Meo Class IV Orals Ques Bank - Mumbai Mmd

MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI Compiled by: WASIM HUSSAIN N https://www.facebook.com/en.wasim

F1 Foam fire fighting system(quantity,ration,line,requirements) BarikF2 What will you do if all the foam is used in one go ? (what for next time ? How you will

prepare onboard?)Barik

F3 Different fire fighting mediums BarikF4 What is the procedure followed to enter CO2 room? (Lots of cross questions on this) Barik

F5 Draw deck seal on your ship and also draw if any alarms or trips on it. BarikF6 CO2 system explain with diagram? Why isolating valve provided in the manifold? What all

are the safeties?Barik/Dastur

F7 Types of detectors on board Bhalla -ShirishF8 Is there a safety valve on fire main? Bhalla -ShirishF9 Isolation valves on fire main; it's use if fire on main deck n E/R? Bhalla -Shirish

F10 What basic check do you think you should do while entering CO2 room? Bhalla -ShirishF11 On an oil tanker fixed fire fighting system on-board. KamathF12 On deck what type of system you use? Why only low expansion foam? Why not high

expansion foam? And where high expansion foam is used?Kamath

F13 Hyper mist system. KamathF14 From where do you maintain water supply to Hypermist system? KamathF15 Fire detectors, fire extinguisher/fixed types. Draw the hyper mist system KamathF16 What are fire fighting system for boiler? What is size of foam extinguisher? Majumdar/Singh

F17 CO2 system weekly checks MishraF18 Draw CO2 portable extinguisher. Its safeties? How it works? MishraF19 Draw mechanical foam system & explain with all its content MishraF20 Ship coming out of dry dock after major changes in fire system. You join the ship and how

will you come to know?Narain

F21 How will you calculate no. of CO2 bottles for engine room? Narain/SainiF22 Safeties in Fixed CO2 system and in CO2 room. Draw CO2 cabinet alarm ckt diagram. Piplani

F23 Fixed fire fighting in deck and E/R? PiplaniF24 Deck fire fighting arrangement on LPG. SharmaF25 Halon system and some other details. When it is going to be eliminated? Principle

involved - how exactly it extinguishes fire (breaking chain reaction)Sharma

F26 If fire in engine room and decided to release CO2, what action will you take before release?

Singh

F27 CO2 flooding system: safeties prior to entry of CO2 room (ventilation should be on, room temp to be maintained below 55 deg C) SinghF28 Fixed CO2 System SubramanianF29 Which extinguishing medium for deck? Draw foam system entire line for deck and ER.

Foam expansion ratios?Subramanian

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FN 3 ‐ COCSOPOOL ‐ FPFF/FFACompiled by: WASIM HUSSAIN N

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F30 What will happen if fire main deck line is cracked and u want water in fire hydrants on deck.?

Cracked fire main lines is major non-conformity, psc detention. Repair, renew the pipeline as soon as possible. Notify flag state, company, supdt. That such non-conformity was found during inspections. Class is to be informed about it. If temporary measures are taken, a condition of class is issued for 3 months to 5 years depending upon whether the work can be carried out during operation of ship or emcy dry dock or in drydock. When permanent repairs are carried out, class again to be informed, class surveyor will inspect the repairs, testing to be done , satisfactory completion, coc will be removed. Temporary repairs can be done for fire fighting purpose but notify all parties the intention of it.

Trassi

F31 How will you ascertain 85% CO2 has been discharged within 2 minutes? TrassiF32 Hazards on tanker? TrassiF33 FFS for deck on your ship and lot of cross questions on that TrassiF34 DRAW FIRE LINE OF YOUR SHIP (WITH ALL ACCESSORIES) TRASSI's FavF35 Explain fixed foam system VinodF36 What is the pressure setting of relief valve in CO2 fixed fire extinguishing system? What

safety are provided in case if CO2 room itself is under fire?xyz

F37 After CO2 release from where will you enter in the engine room ? How many entrances are there in the engine room ?

xyz

F38 Fire on ME cylinder head - How to estinguish and type of extinguisher? xyzF39 Fire fighting in paint locker? xyzF40 At what interval portable fire extinguisher is refilled and pr. Tested.F41 Why CO2 stored at 53 bar?F42 On what principle does DCP extingushes fire?F43 Sketch and explain DCP, portable extinguisher.F44 Standard FireTest? Standard fire test means a test in which specimens are exposed in a test furnace to

temperatures corresponding approximately to the standard time-temperature curve.

F45 Sustained Flaming? Sustained flaming means a presence of flames on or over any part of a specimenlasting 5 s or longer.

F46 NON-COMBUSTIBILITY TEST ACCEPTANCE CRITERIA OF NON-COMBUSTIBILITYMaterials to be classified as non-combustible shall satisfy the following criteria:.1 the average furnace thermocouple temperature rise as calculated in paragraphs 8.4 and 8.5 of the appendix does not exceed 30°C;.2 the average specimen surface thermocouple temperature rise as calculated in paragraphs 8.4 and 8.5 of the appendix does not exceed 30°C;.3 the average duration of sustained flaming as calculated in paragraph 8.3 of the appendix does not exceed 10 s; and.4 the average mass loss as calculated in paragraph 8.2 of the appendix does not exceed 50%.

F47 In hyper mist system how 11 bar(Pres of pump is confirmed) pump generates a fine mist? Surveyor asked the speciality of nozzle?

Wasim Hussain N Diffuser action at nozzle, drop in the pressure at nozzle throat and thus breaking of the liquid particles


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L1 What is EPIRB?how does it activate? HRU?how does it operate? (it activates automatically when it floats in water & water comes in contact wid sea switch) Iqbal

L2 SART? Location? Any indications where SART is kept? Functioning? IQBAL - JHAL3 EPIRB IQBAL - JHAL4 HRU? function? Working principle? Where we use HRU? IQBAL - JHAL5 How will you lower the life boat? Which all checks will you carry out before you lower the life

boat?Kamath

L6 MOB? Details KamathL7 What is survival craft? KapoorL8 Definition as per SOLAS chapter 3. KapoorL9 Type of survival craft. Kapoor

L10 Type of life boat Kapoor

L11 Lowering of enclosed lifeboat. Kapoor

L12 What if free-fall lock doesn’t operate? Kapoor

L13 Regulations of lifeboat Kapoor

L14 Speciality of Tanker Lifeboats Sprinkler System, Air Support system Majumdar/Narain

L15 Where does Air support system take air from? What if the Air from cylinders gets fully discharged?

Majumdar/Narain

L16 Lifeboat - What all we carry in lifeboat? Mishra

L17 Regulation for the lifeboat engine Mishra

L18 Weight of the life boat Mishra

L19 If the life boat engine is not starting what to check? Mishra

L20 Lifeboat lowering procedure and brief explanation about onload and offload release mechanism.

Mishra

L21 What is MOB marker? How much it weighs? How it differs from other lifebuoys? Narain/Saini

L22 Immersion suit? How many on board? Narain/Saini

L23 Automatic life raft launching Narain/Saini

L24 Lifeboat Lowering- use of main and centrifugal brakes. Subramanian

L25 Explain auto life raft inflate arrangement. How does HRU works? Which bottles we use to inflate life raft, how?

Subramanian

L26 Life boat DAVIT safeties Subramanian

L27 How many life rafts on your ship, their location , and capacity of one in fwd? Trassi

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L28 Launching of liferaft Vinod

L29 Locations of the EEBD Vinod

L30 EEBD Vinod Kumar

L31 LSA on ship Vinod Kumar

L32 Procedure for lowering of a Life boat 1. Minimum of 5 persons are required to lower the L/B.2.One person goes inside the L/B and passes the end of toggle painter and plugs the drain.3. Check all lifeline and falls are clear of L/B.4. Make fast the other end of toggle painter on a strong point forward of the ship.5.Remove forward and aft gripes and both person stand by for passing bowing tackle and tricing pendant.6.Remove harbour safety pin.7.Make sure the ship’s side is free of everything, no water or garbage is there.8. Now, one person lift’s the dead mans handle slowly which releases the brake.9.The boat along with cradle sides downward till it comes to the embarkation deck.10.By pulling tricing pendant , bring it alongside the embarkation deck.11.Persons embark inside the boat.12.Now, tricing pendant is removed and the whole load comes on falls.13.Now, boat is further lowered with deadman’s handle.14.As soon as the boat comes around 1meter above the sea-water, it can be released.

L33 Difference between launcing of life raft on side and that of forward life raft?

L34 Lifeboat engine regulation, what if engine is not starting in cold countries?

L35 What is dead man's handle ? What are it functions ? Its called dead mans handle because: though during drills bosun lifts up and life boat gets lowered , that is not the only way u can lower lifeboat. There is a wire rope extend thru pulleys and levers in the lifeboat for the same purpose. So considering this, even one person is sufficient to lower this life boat from lifeboat and escape when all other people are dead. Since there is no person lifting the brake handle physically or loaclly but remotely in the lifeboat, it is called dead mans handle.

L36 Lifeboat maintenance

L37 How many brakes are there on a life boat winch?

L38 Regulation regarding the stowage position of life raft ?



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E1 Regulations for pumping out bilges and cargo residues BarikE2 Discharge criteria of Annex 1? BarikE3 What is Annex 2? Categories BarikE4 What is the constructional requirement for carrying category X cargo? BarikE5 What are the requirements to pump out bilges in special area? BarikE6 For which all ships MARPOL Annex 4 applies? BarikE7 How will you transfer bilges - step by step procedure? What all records you record in Oil record book? From where

you will get the positions? Why positions are required? How will you come to know that you are not in special area?Barik

E8 What do you know about SOx limitations? If you have fuel of only 3.5% sulphur content, is it possible for you to enter SECA area? I told him, exhaust gas cleaning system - he wanted the chemical reaction also.

Barik

E9 Sewage discharge regulation through holding tank, if no approved treatment plant. BarikE10 What is Type1,2,3 tanker? BarikE11 How many annexes are there in MARPOL and explain annex 4 Barik/DastoorE12 Requirements for incinerator and temperature for different chambers Barik/NetiE13 What all you can burn in incinerator? Barik/NetiE14 Difference in discharge criteria of Annex I - between Special Area and Outside Special Area Barik/SubramanianE77 MARPOL annexes and which on your ship was following? Bhalla/ShirishE78 Regulation regarding bilge discharge Bhalla/ShirishE15 Entries to be made in Oil record book? IqbalE16 Which annex of MARPOL deals with garbage? Tell the requirements IqbalE17 Contents of bunker delivery note. IqbalE18 What is Annex 6? IQBAL - JHAE19 New regulations for SOx emmision IQBAL - JHAE20 Greenhouse gases and functions of each IQBAL - JHAE21 MARPOL Annexes 1-6 (as in he wanted the tag line as per marpol) KamathE22 Sewage and garbage discharge regulations KamathE23 Sewage Treatment Plant certificate. KamathE24 MARPOL annexes and accordingly certificates issued. KamathE25 MARPOL equipments. KamathE26 Annex 6 amendment - ECA areas and SOx criteria KamathE27 Requirements of MARPOL KamathE28 BOD, echoliform count calculation & sample test procedure MajumdarE29 What is the alternative sampling point other dan the bunker manifold drip sampling point in a bunker line? Narain

E30 How will you reduce Nox? PaulE31 MARPOL new regulations PaulE32 What is EEDI? Why was it not earlier for what is it for? PaulE33 SOx NOx what is presently in use and values Paul

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E34 MARPOL Annex VI. EEDI n SEEMP. Details. What steps to achieve SEEMP and how to reduce CO2 emission? Sharma

E35 SOx and NOx regulation, tiers. Reduction methods SharmaE36 MARPOL Annex V new amendments SharmaE37 MARPOL Annex IV, when in force, discharge criteria SharmaE38 Difference b/w 15 ppm critiera of general cargo and tanker SharmaE39 Incinerator alarms. SharmaE40 New regulations in garbage and Annex VI - wants to know about EEDI SharmaE68 What does en route signify ShireeshE41 Garbage Record book (in depth) Shirish KumarE42 Annex 1 discharge Criteria SubramanianE43 Annex 6 complete SubramanianE44 EIAPP certificate SubramanianE45 EEDI & SEEMP SubramanianE46 Sewage treatment plant, BOD, SubramanianE47 Garbage New regulations SubramanianE48 Annex 6 pollutants? SubramanianE49 What is BDN and what does it contains? Retention period onboard? It comes under which annex? SubramanianE50 What is MARPOL sample? Retention period? SubramanianE51 ER bilge pumping regulation? SubramanianE52 Annex 6 new amendments. SubramanianE53 NOx limits. Tier 1, 2, 3, what does it signify. SubramanianE54 Bunker sample. How to take? How long on-board? SubramanianE55 Where is sulphur content of bunker recorded? ORB/Log Book? SubramanianE56 If I am PSC can I come and take your ship bunker sample? If no, what is the rule? If yes then where will you log

this down that PSC has taken the sample?Subramanian

E57 How to control NOx? What proof it’s under control? If old ships cant comply what they have to do? SubramanianE58 Annex VI - besides SOx, NOx, particulate matter and air pollution, what is it about? SubramanianE59 Remove gas from refer/AC? How to do? How does the recovery system comply with Annex VI? SubramanianE60 BWM Convention - Details TrassiE61 AFS Convention - Details TrassiE62 Why is emergency steering used? TrassiE63 Annex V when it came into force and discharge criteria. TrassiE64 Discharge criteria of MARPOL Annex IV. Trassi / MajumdarE65 ORB Part I entries. Vinod KumarE66 How MARPOL Annex VI complied on ship? Vinod KumarE67 Describe Annex IV briefly? Who approves sewage treatment plant, how this regulations are made, what tests are

made? What will decide the rate of flow in discharging the sewage OBD?xyz



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E69 What are the contents of SOPEP locker and its position? Contents of SOPEPSOPEP contains the following things:1 The action plan contains duty of each crew member at the time of spill, including emergency muster and actions.2 SOPEP contains the general information about the ship and the owner of the ship etc.3 Steps and procedure to contain the discharge of oil into the sea using SOPEP equipments.4 On board Reporting procedure and requirement in case of oil spill is described.5 Authorities to contact and reporting requirements in case of oil spill are listed in SOPEP. Authorities like port state control, oil clean up team etc are to be notified.6 SOPEP includes drawing of various fuel lines, along with other oil lines on board vessel with positioning of vents, save all trays etc.7 General arrangement of ship is also listed in SOPEP, which includes location of all the oil tanks with capacity, content etc.8 The location of the SOPEP locker and contents of the locker with a list of inventory.

E70 How many bunker samples taken during bunkering?E71 Why bilge lines are flushed before dry dock entry?E72 Why incinerator exhaust not used as inert gas ?E73 What is the difference between MARPOL Annex I regulations inside and outside special areas?E74 Wht is sweet crude and sour crude ? Wasim Hussain N it is H2S Related , a very frequent term in

Petroleum industry, H2S less than 25ppm is Sweet and anything more than that is sour , the significance in petroleum industry is with the material properties required in handling and transport equipment for the crude. A pipeline designed for sweet lean gas cannot be used to transport sour gas (or crude for instance)

E75 Why MARPOL Annex II is called Regulation for the control of pollution by noxious liquid substances in Bulk. While others Annex are for prevention ?

it is because in this annex, we intentionally discharge the residue of x y & z catagories but only after diluting it to a prescribed valueand thus we don't prevent but control the pollution unlike other annexes..



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E76 What is MARPOL LINE? marpol lines r smmal dia lines which r fitted to the cargo line nd connected to strippin pumps for efficient stripping.... thus the cargo residue onboard can b reduced by discharged to port .wen cargo residue is less onboarrd cow washing can b efficiently done which in turn reduces the pollution caused by cargo residues hence it is cald marpol lines

E79 ODMC working, purpose, regulation




SC1 Different types of keel (function of bilge keel) BarikSC2 How is bilge keel attached to hull BarikSC3 Why dry dock required BarikSC4 Collision bulkhead BarikSC5 Why tankers have less freeboard? BarikSC6 Electrical safeties in steering gear sys? BarikSC7 What do you check in keyless propeller when it is removed in dry dock just after inspection? How

will you make sure that it is fitted properly?Barik

SC8 Which is continuous tank top or bulkhead?? BarikSC9 What is special about collision bulkhead and where it is placed? Barik

SC10 What do you check in keyless propeller when it is removed in dry dock just after inspection? How will you make sure that it is fitted properly?

Barik

SC11 Do you know what is reverse transom stern. Draw its structure. Barik/DastoorSC12 GRT, GT, Deadwt, Tonnage, NT, Lightwt, Displacement, TEU Barik/Narain/SainiSC13 Draw cross section of bulk carrier and explain BhallaSC14 Load line draw n explain. BhallaSC15 Duct keel define and give measurements of it. Where it opens up and what is the use of it? Bhalla/ShirishSC16 Camber, sheer Bhalla/ShirishSC17 Bilge keel; draw how it is attached to the ship. Bhalla/ShirishSC18 Are stiffeners used for collision bulkhead? What is the spacing b’n stiffeners? IqbalSC19 What is apparent slip? IqbalSC21 Importance of freeboard, and some cross question. IqbalSC22 Function of floors. IqbalSC23 What is fresh water allowance, and some cross question. IqbalSC24 Midship Section of Bulk carrier IQBAL - JHASC25 Angle of Lol and what is GM , at angle of Lol. IQBAL - JHASC26 Plimsoll marking IQBAL - JHASC27 What is Garboard strake, sheer strake, bilge strake? KamathSC28 What is buttock line in ship? KamathSC29 What are the diagrams on your ship posted in alleyways regarding ships structure and exact KamathSC30 Reserve buoyancy Kamath

SC31 Lightweight, Deadweight (cross questions). KamathSC32 Angle of Loll. What happens when ship rolls now? KamathSC33 Watertight Bulkheads its uses, from where to where it extends? KamathSC34 What is TEU & FEU? KapoorSC35 How container is loaded in hold and on top of container. KapoorSC36 How is locking of container is done. Name of that device. KapoorSC37 Safeties of deck crane and what all safeties are provided in operator's cabin? KapoorSC38 What is hose test for cargo hold and how it is done and on which all parts of cargo hold/hatch cover Kapoor

FN 3 - COSCOPOOL - SHIP CONSTRUCTION & NAVAL ARCHITECTURE

FN 3 ‐ COCSOPOOL ‐ SHIPCO/NAV ARCHCompiled by: WASIM HUSSAIN N



SC39 Torsion box. Diagram and purpose. What is torsion box? All the details with diagram and cross questions

Kapoor / Mishra

SC40 What is Metacentric Height? What is the effect of large / small Metacentric Height? Majumdar

SC41 How where to calculate rudder drop using trammel guage and propeller drop using poker guage? Rudder drop: trammel gauge. Its an L shaped or sometimes C shaped or MajumdarSC42 GRT, NRT, DWT, LWT & Calculation Majumdar/BarikSC43 What is function of Bilge Keel? What is length and width of Bilge Keel on your ship? Majumdar/NarainSC44 What are other means of damping the rolling of ship? Majumdar/NarainSC45 Rudder Construction MishraSC46 GZ and GM curves, explain stability in it, at what angle will vessel lose its stability? MishraSC47 Draw cargo hold & show all components & attachments MishraSC48 Garboard strake, freeing port? Narain/SainiSC49 Safeties provided on sounding pipe Narain/TambvekarSC50 Draw and explain construction of double bottom tank. Show all frames used PiplaniSC51 Corrugated bulkheads and what advantages over normal bulkheads? PiplaniSC52 Forces acting on fwd part of ship in heavy weather? What is bulbous bow? Whether it is solid or PiplaniSC53 Types of stabilizers Piplani/Kamat

SC54 Definition - hawse pipe, spurling pipe, sole piece Piplani/KamatSC55 What type of crane on deck ? S NarainSC56 Various types of keel? Explain duct keel in detail? SainiSC57 Define deadweight SharmaSC58 Free surface effect. How to reduce in tankers and in bulk carriers? What are the processes? Terms SharmaSC59 Difference b/w cargo and passenger ship Sharma

SC60 What is floors? Where are they located? There types? SharmaSC61 Pounding and Panting? Discuss in details. Explain the arrangement in fwd part of ship’s structure to

counteract the same. Sharma/Mishra

SC20 Inclining experiment? What is inclining angle? (Cross questions) Shirish / Iqbal

SC62 How do calculate freeboard? http://www.marinewiki.org/index.php?title=Freeboard_calculation Shirish KumarSC63 What is free surface effect and in which ship? xQs Shirish KumarSC64 Where is bulbow bow and what's that for ? Have to explain no drawing? Shirish KumarSC65 Collision Bulkhead: location and function SinghSC66 Stable and Unstable Ship with diagram SinghSC67 How keyless propellers doesn’t slip, what principle? SubramanianSC68 Draw the mid-section of bulk carrier. Lots of cross question regarding framing, floors, use of hopper

tanks?Subramanian

SC69 Strengthening of rudder. Where is load taken? SubramanianSC70 Draw load lines. Significance. SubramanianSC71 Aft end arrangement drawing with provision to show strengthening for taking the rudder weight. SubramanianSC72 How is propeller fitting done? Procedure? How is it secured? The nut name? SubramanianSC73 Draw shafting and propeller diagram Subramanian




SC74 Panting? Draw panting region. All the stiffeners names. SubramanianSC75 Drawing of shell plating in NA – What is that drawing called? SubramanianSC76 Draw quick closing valve and explain the mechanism TambvekarSC77 What is Aframax, Panamax, Suezmax, Kamsarmax? What is being done to Panama Canal

presently?Trassi

SC78 Free surface effect TrassiSC79 If the hatch cover is closed, how will you know hatch cover is not leaking? Hose test. Condition of hatch cover seals. Inspection of all coamings and receses

where seals fit tightly.TRASSI

SC80 At what pressure bulk carrier cargo hold is tested for its integrity.? TRASSISC81 Which type of windlass onboard? TRASSISC82 Which type of windlass pump and what is the motor rating? Type of starter? TRASSISC83 Load line curve TRASSISC84 What is gunwale? TRASSISC85 What is Camber? TRASSISC86 What are the types of floors? TRASSISC87 In double bottoms what arrangement is provided to subdivide the tanks e. g. (db tk1, db tk2, db tk3

etc.)?TRASSI

SC88 Transverse bulkhead diagram TrassiSC89 Transverse bulkhead oil tanker draw it TrassiSC90 Draw fwd and aft part of ship TrassiSC91 Type of keels and draw bilge keel. Types of keel? Cross section of bilge keel. What are the

dimensions of bilge (plate/keel)?Trassi

SC92 What difference between product tanker and crude carrier? TrassiSC93 Deck crane - if it rotates 360 degrees then how the flexible hydraulic hose does not gets entangled? hydraulic unit with power pack and motor all located in upper slewing post Trassi / Barik

SC94 How will you make sure if hatch covers are seal tight? Which test? Explain fire hose test? Trassi/VinodSC95 If GZ is more, what does it indicate? It’s a stiff ship or tender ship? VinodSC96 Stability of a ship, VinodSC97 Free surface effect, how can you reduce free surface effect? VinodSC98 When a surveyor comes for loadline markings, what he checks with respect to engine room

equipments for load line?XYZ

SC99 How is watertightness of a Bulk Head tested? http://www.ukpandi.com/fileadmin/uploads/uk‐pi/LP%20Documents/Carefully_to_Carry/Testing%20hatchcovers.pdf

SC100 GZ curve and cross curves of stabilitySC101 Why minimum bunker is maintained before entering into drydock? (NEEDS REVIEW) its the GM of the ship, which get affected while docking.... Wth

more bunkers, ur c.g. Will drop down....and at the time of crtical docking point, the gm value is drastically changed.....so...the more difference between g and m of gm.....the less stable she becomes while docking it frm aft, at the first instant itself....

SC102 Inspection of sea chest in drydock Wasim Hussain N 1. Condition of Paint / Coating 2. Condition of Grating / Wastage, if any 3. DPT / UT for surface inspections in areas where there is change of shape i.e corners, edges, bends 4. Condition of Sea Chest Sacrificial Anodes & Electrical Continuity of the same 5. Steam blow or air blow line to be checked clear.




SC103 How will you find out if rudder is cracked in dry dock? How will you fix the crack?

SC104 What is rudder balancing? http://www.marinewiki.org/index.php?title=Rudder_-_Swing_test

SC105 What happens to GM of ship, when ship moves from water to dock?

SC106 What is loadicator?

SC107 In the threaded portion of the propellershaft which diameter is bigger : fwd or aft?

SC108 What is singing of propeller? Some propellers in service produce a high-pitched noise, often referred to as Singing. This sound typically is a clear harmonic tone much like a humming or ringing wine glass.More of an annoyance than anything harmful, the causes of singing are not completely understood. Many theories have been put forward to account for the phenomenon of Singing, but it appears to be affected by critical factors for which the theories make no allowance. For instance, in some cases when a twin-screw vessel has one propeller that sings, the noise is eliminated just by switching position of propellers. Or had been replaced by an identical spare Propellers which were found silent. Also the less number of blades the less cases of "singing".

Mitigation of Singing: Antisinging EdgeThe singing is in function of propeller diameter and Rpm's, Boat speed and Trailing-edge size (thickness) and roundness. In most of the cases not much can be done on Diameter, Rpm's or speed, but we can modify the Edge Geometry. This has been the Strategy for all efforts to eliminate singingMost Propeller professionals (and others) are familiar with the Antisinging Edge – a Chamfering of the Trailing edge, typically on the Suction side. The intent of this shape is to avoid the creation of curving flow eddies by cleanly separating the flow off of the blade.The following graphic shows the Chamfering that goes from a 0.5 or 0.4 Radius to the tip of Suction Side.However the adoption of unduly thin edges can result in erosion or fracture of the blade near the edges, it is advised that Antising Edge may be considered as a last resort to minimize the Singing of an existing Propeller.

SC109 How to know ship sagged or hogged?SC110 Why tanker having less freeboardSC111 During fooding of ER, the aft end sinks first, still the emergency bilge suction valve and the

emergency bilge pump are situated to forwd end of the engine. Why?SC112 Differentiate between crane and derrickSC113 What is the difference between watertight door and weathertight door?




SC115 Safety Features of Engine Room Crane: 1) The most important safety feature of the crane is the electromagnetic fail safe brakes which do not allow the crane to fall with the load even when there is failure of power. For this:Normally centrifugal brakes are used which are fitted inside the rotating drum.The brake pads are always in applied state and pushed by magnetic springs when not in operation or when there is a power failure.As the crane is operated or the power is supplied, the spring gets pulled inward or compressed due to the electromagnetic effect of the current. This allows the crane to be operated normally.2)Emergency stop is provided in the remote so that the operator can stop the crane at any time.3)The motor is fitted with distance limit switch in both transverse and longitudinal direction so that the travel of the trolley and hence crane should not overshoot the rack’s end.4)Mechanical stoppers are provided for both directions in case the electrical distance limit trips fail.5)The up and down travel of the hook is also attaches with automatic stopper to avoid overloading of the motor.6)The motor is fitted with thermal protection trip. When the motor windings get overheated, trip will activate saving the motor winding from burning.7) Load limit switch is also fitted which will trip the motor if the load to be lifted is above the crane capacity.




SS1 How will you confirm that pump room ventilation 20 air changes are taking place? BarikSS2 Draw deck seal on your ship and also draw if any alarms or trips on it. Barik/MishraSS3 Pump room blower capacity and regulations? KapoorSS4 GAS CARRIER: Draw and explain fixed DCP fire fighting system on deck & cargo space PiplaniSS5 GAS CARRIER: LPG cargo containment system? PiplaniSS6 GAS CARRIER: MARVS setting on cargo tanks.. PiplaniSS7 GAS CARRIER: Material of tank insulation - what is there in the space between primary barrier & secondary barrier of

cargo tank?Piplani

SS8 GAS CARRIER: When you carry propane in cargo tanks, what arrangement is provided for expansion of tanK? PiplaniSS9 GAS CARRIER: : Draw cross section of cargo tank? Material of chokes on which tank is supported. Cargo Boil off rate

for your ship?Piplani/Majumdar

SS10 GAS CARRIER: Loading and discharging operation. What safeties provided and all alarms and trips. Details. SharmaSS11 Gas Carrier: Why do we have booster pumps and heat exchanger in cargo line? TrassiSS12 GAS CARRIER: Air lock arrangement explain with diagram and regulations regarding the same. TrassiSS13 GAS CARRIER: Types of gas carrier. TrassiSS14 Gas Carrier: Types of cargo pumps you had on-board. TrassiSS15 COPT Trips TrassiSS16 OIL TKR: Hazards on crude oil tanker TrassiSS17 What do u mean by Aframax tankers? TrassiSS18 What pressure and vacuum values are there for PV valve and PV breaker? TrassiSS19 CHEM TKR: Difference between BCH & IBC code? BCH applicable to ships made before 1st July 1986 & IBC

after 1st July 86.Trassi/Barik

SS20 CHEM TKR: Draw cross section of type 2 tanker along with constructional details. Trassi/BarikSS21 CHEM TKR: How many cargo tanks? Trassi/BarikSS22 CHEM TKR: How many manifolds? Trassi/BarikSS23 CHEM TKR: Which cargo needs water padding? Phosphorus - Red or Yellow? (confirm) Trassi/BarikSS24 CHEM TKR: Which category does vegetable oil falls in? It falls in chapter 17 of IBC code since it is chemical. Trassi/BarikSS25 CHEM TKR: Major hazard on chemical tanker fire, spillage ,health,static charge,and reactivity of cargo with

tank coatingTrassi/Narain

SS26 CHEM TKR: Type 1 chemical tanker draw how tank is arranged? Trassi/NarainSS27 What checks you make on p/v breaker? VaadSS28 What is the function of mast riser? VaadSS29 Pump room ventilation, blower interlocks VinodSS30 Why oil does not come out of PV valve or vents though tank pressure is more than the atmospheric pressure? Pv valve has a setting for over pressurization and vacuum.

Before that setting is achieved nothing will come out. Plus 2% volumetric space is provided for expansion and contraction purpose which is more than sufficient to stabilise the pressure. However if that setting is achieved then oil will come out of it.

FN 3 COSCOPOOL - SHIP SPECIFIC / CARGO SYSTEMS




IG1 What is the Difference between the IGG and IGGS? KapoorIG2 (Safety)Regulations for IG? KapoorIG3 Why IG not required below 20000 DWT? KapoorIG4 Why IG not in bunker tanks? KapoorIG5 Scrubber tower with diagram MishraIG6 What is safety on IG line? Narain/SainiIG7 What is used to prevent the back flow from cargo tanks? Narain/SainiIG8 Where you have read about the regulation of IG? Narain/SainiIG9 Above what flash point IG is used? Why not for F/O? Is there any fuel less than 60 deg. What? And how much is the

flash point? Used in what?Paul

IG10 Why IG used for COW? (static electricity) PaulIG11 Inert gas purpose, what was system on your ship? PiplaniIG12 Draw IG system and many cross questions in it - like type of water filled in deck seal (SW or FW)? Function of vent v/v

on the line? Difference in pv valve and pv breaker? Reasons for high oxygen % in inert gas?Saini

IG13 IG below 20000DWT. What to do if IG is not there? How to carry cargo(on less than 2000DWT)? Arrangements and their details

Sharma

IG14 Visual inspection of IG furnace and Demister SharmaIG15 Deck seal as on your ship - draw it TrassiIG16 IG Alarms & Trips TrassiIG17 What are the pressure limits for p-v valve and p-v breaker on IG system? TrassiIG19 Draw Mast Riser. How is Mast Riser connected to all tanks? How is the Vapour Emitted from Mast Riser? How is the

Pressure given to the vapours?Trassi

IG20 Safeties devices in IG system, trips VinodIG21 What is the purpose for mast riser ? Does mastriser function same as High Velocity Vent Valve (HVVV) ? XYZIG22 What is the difference between PV breaker and PV valve ? XYZIG23 Why do we inert the tanks in oil tanker? XYZIG24 Inert gas plant XYZ

FN 3 - COSCOPOOL - IG SYSTEMS




F3-1 Which person on ship is not a passenger (Crew and child below 1 year) F3-2 What does PSC inspector checks on ship? BarikF3-3 What is risk analysis? If you have to do hot work on bottom platform then how will u do risk analysis? IQBAL - JHAF3-4 What is STCW? 1995 ammendments? 2010 ammendments? Why 2010 ammendments? Piplani/ShirishF3-5 Full form of function 3? Name all the subject which function 3 covers? Sharma/BarikF3-6 Difference b/w Flag state and PSC Sharma/Saini/Na

rain

F3-7 What is PSC and its functions? SubramanianF3-8 Name a few conventions? What are conventions? VinodF3-9 What is classification society and its function? How Lloyd’s Register started? Vinod

F3-10 What is the speciality of SCBA compressor ?F3-11 What is meant by White list?F3-12 What is there to check cargo density if cargo pump is tripping on overload?F3-13 Saturday routines ? please enlistF3-14 What is LANE METER? A method of measuring the space capacity of ro-ro ships

whereby each unit of space (linear meter) is represented by an area of deck 1.0 meter in length x 2.5 meters in width.

F3-15 Bunkering safetiesF3-16 Actions after getting OMD alarm? BarikF3-17 E/R flooding – Actions? While answering he asked All Requirements of Bilge Injection Valve PiplaniF3-18 Bad weather precautions and actions SinghF3-19 Actions taken when there is an oil spill VinodF3-20 Bunker hose bursts while bunkering; actions to be taken.

FN 3 COSCOPOOL - EVERYTHING ELSE




Column1 Column2 Column3 Column4SO1 What is major non conformity ? BarikSO2 What is the non conformity and who all can find these? auditor, - internal or external (flag, class) BarikSO3 Regulations for Emergency generator? BarikSO4 What are the documents issued under ISM code (lots of cross questions on this) BarikSO5 ISM certificates and when they shall be revoked prior to 5 years BarikSO6 What is the difference between cargo and passenger ship? BarikSO7 Where do you find your duties on board? BarikSO8 What all is there in SMS manual? BarikSO9 Who issues DOC and SMC and validity and to whom it is issued. Barik

SO10 What are the differences in life boat and rescue boat? BarikSO11 What is Chapter 9 of SOLAS? Barik/DastoorSO12 What are SOLAS Chapter 5 new amendments?? Barik/DastoorSO13 How will you know that the copy of DOC on-board is concerned to that vessel only? Barik/MishraSO14 What is the non-conformity and who all can find these? Barik/MishraSO15 ISPS Barik/Vaad/MishraSO16 Name SOLAS Chapters & Explain Ch 12. How you will detect fire in cargo hold? Bhalla/ShirishSO17 Certificates carried on board Bhalla/ShirishSO18 What is ISM code and why it came into action? Tell me at least three main objectives of ISM? If two

hrs notice is given what will be your first action?Kamath

SO19 ISPS - how the system works, depth KamathSO20 AIS Details? How it works? What identifications you are getting? Use of AIS? Kamath/TrassiSO21 Security levels.....with cross que KamathSO22 What all certificates should be carried by ship? Kamath/BarikSO23 What is the difference between the CODE and the Convention? KapoorSO24 Name 6 codes and 6 conventions? KapoorSO25 What is SOLAS Ch IX? Tell me about that MishraSO26 SOLAS chapter 11. Explain everything whatever it deals with. Both parts. MishraSO27 What is chapter 9? How many regulations of ISM? MishraSO28 Emergency fire pump regulation Mishra/TrassiSO29 Explain ISPS and lot of cross questions? Narain/SainiSO30 Have you ever followed ISM code on-board? Narain/SainiSO31 Under which SOLAS chapter ISM Code included? Narain/SainiSO32 Latest amendment in SOLAS regarding Lifeboat NewSO33 Duty of DPA? What is non-conformity? SainiSO34 Emergency generator and emergency fire pump regulations? SainiSO35 Bulk carrier transverse stability Chapter in SOLAS SharmaSO36 ISM code new amendment (energy efficiency) SharmaSO37 ISPS - Basic/General SharmaSO38 What are the emergency fire pump regulations and working? (means of starting and at what

distance how much pressure this is what he wanted)Singh

FN 3 COSCOPOOL - SOLAS & RELATED CODES




SO39 New Amendments in SOLAS SinghSO40 SOLAS Ch 11 - B, some certificate, who assigns it, validity. SubramanianSO41 ISM objectives? How will you make sure that it’s being followed? SubramanianSO42 ISM Details : What is ISM? History of ISM. Which SOLAS Chapter? What certificates / verifications/

validity/ issuing authority? Difference between SMC & DOC? Similar items in SMC & DOC? How do you know ISM is implemented on a ship when you join?

Trassi / Barik / Majumdar

SO43 Functional requirement of ISM? (one sentence answer). How ISM maintained and monitored onboard? Certificates Issued and other things like audits, management review etc.

Trassi / Kapoor

SO44 What is IMDG and IBC code? What certificates are issued under these codes? xyzSO45 In which chapters of SOLAS and Annexures of MARPOL do IBC and IMDG code related? xyzSO46 What is ISPS code (full form) when it came into force, what certificates? Who were your DPA, CSO,

and SSO? What are their responsibilities (each of them) where is their name posted?xyz

SO47 What are security levels, how these were maintained on-board? Your responsibilities? xyzSO48 What is VRP? (Vessel Response Plan?)




4ME1 During manoeuvring, how will you know leakage in Air starting valve? AK Sharma4ME2 T/C surging. Procedure to follow during departure of main engine? AK Sharma4ME3 Purpose of negative cam in distributor? AK Sharma4ME4 Fuel injector leaking? What it indicates? Exhaust temperature will be high or low. AK Sharma4ME5 What all will check when you take round of main engine only? AK Sharma4ME6 Why turbocharger? Barik4ME7 Surging and reasons for it Barik4ME8 How main engine reversing takes place? Barik/Dastoor4ME9 There is alarm of OMD. What actions will you take? Barik/Dastoor

4ME10 How main engine reversing takes place? Barik/Dastoor4ME11 Main difference between LO oil used in crankcase for 2S & 4S Barik/Dastur4ME12 When you are taking indicator card and engine tripped on some mechanical trip what will be

maximum pressure?Barik/Mishra

4ME13 Stresses acting on 4stroke conrod. Are they any different than 2s conrod stresses? Barik/Mishra4ME14 Different means of reversing . How reversing took place in ur ship? Barik/Neti4ME15 Draw indicator diagram for leaking fuel injector. Iqbal4ME16 How is firing order for Main engine decided? Why 1-7-2-4-6-3-5 and not 1-2-3-4-5-6-7? Iqbal4ME17 Importance of flywheel. Narain/Iqbal4ME18 Stern tube lubrication and some cross question. Iqbal4ME19 Piston rings, Determine Condition of piston ring w/o removing piston out. IQBAL - JHA4ME20 Coolers on ME / AE IQBAL - JHA4ME21 Critical Speed IQBAL - JHA4ME22 Why chokes are used in engine, types of chokes? IQBAL - JHA4ME23 Starting Air Line Safeties IQBAL - JHA4ME24 Advance technlogy in Engines? IQBAL - JHA4ME25 Types of crank shaft. Welded crank shaft is welded where? AE has which crank shaft? Jha4ME26 How do you measure ovality of big end? Why do u measure at those point only? Jha4ME27 Why bottom end serrated? Jha4ME28 BSFOC calculation (from qty of FO in liters ) Kamat/Piplani4ME29 Exhaust manifold- How pulse of exhaust gets converted into constant pressure? Kamat/Piplani4ME30 Hydraulic exhaust valve and spring loaded old type valves - what are advantages? Kamat/Piplani4ME31 Air cooler maintenance Kamat/Piplani4ME32 Starting air line safeties (Fn 3) Kamat/Piplani4ME33 M/E fuel injector diagram operation. Kamath4ME34 M/E interlocks. Kamath4ME35 M/E Manoeuvring Kamath4ME36 M/E - What S denotes in SMC Kamath4ME37 What if stroke to bore ratio less. Kamath4ME38 Advantages of super long stroke. Kamath4ME39 M/E valve timing diagram. Kamath4ME40 M/E exhaust v/v how it operates. Function of sealing air. What if sealing air not present. Kamath

FN 4B - MEOL - MAIN ENGINE, ME SHAFTING AND RELATED SYSTEMS

FN 4 ‐ ME RELATED SYSTEMSCompiled by: WASIM HUSSAIN N



4ME41 Why exhaust valve don’t fall in liner when spring air not present. Kamath4ME42 M/E bottom end bearing clearance procedure. Kamath4ME43 Cross head-why is it there in 2-s and what does it do primarily. Kamath4ME44 2-s /4-s difference and difference between there lubrication system Kamath4ME45 Difference between c-case oil and cylinder oil, oil used for camshaft lub. , cold corrosion. Kamath4ME46 Piston cooling in 2/s & 4/s, and parameters. Kamath4ME47 Jacket cooling Parameters. Kamath4ME48 Cylinder Lubrication in 2/s & 4/s. some cross questions. Kamath4ME49 Scavenge fire. Kamath4ME50 Crank case explosion. Kamath4ME51 Piston oil cooling line in both aux and main. Kamath4ME52 Safety valve on ME. Kamath4ME53 Prepare main engine .but while explaining put lots of cross questions - like what if leak in JCW

line etc.Kamath

4ME54 Cylinder line lubrication oil properties? Kapoor4ME55 Full shaft arrangement of M/E, how is it connected to propeller, shafts rest on which thing after the

engine room?Kapoor

4ME56 What is stern tube? where it is? What is the purpose of it? Kapoor4ME57 Valve timing diagram of the loop scvanging and uni flow scvanging? Kapoor4ME58 What is SFOC? How it is calculated? Kapoor4ME59 Liner calibration which tool? Kapoor4ME60 What is the least count and the zero error with reference to micro meter? Kapoor4ME61 Fuel Pump - Jerk type and Bosch type Kapoor4ME62 MEP - How to calculate? Why to calculate? Majumdar4ME63 Tie bolt function and diagram Mishra4ME64 Types of turbocharger Mishra4ME65 Main engine is turning on air but not coming on fuel – reasons? Mishra4ME66 Types of ME bedplate. Mishra4ME67 4 stroke engine for propulsion. Show entire arrangement. Piplani4ME68 Cylinder oil properties for 2 stroke and 4 stroke. TBN value Piplani4ME69 Crankshaft deflection - How taken? How to draw the graph of Angle vs Deflection? How will you

check misalignment is due?Piplani

4ME70 Safeties for crankcase. Function of breather pipe,. Flash point of Lube oil Piplani4ME71 OMD alarm. What % OMD alarm will get activated? Piplani4ME72 Reversing of main engine. Lost motion principle Piplani4ME73 4 stroke engine for propulsion. Show entire arrangement. Piplani4ME74 Cylinder oil properties for 2 stroke and 4 stroke. TBN value Piplani4ME75 How is camshaft & crankshaft connected in M/E? Lubrication arrangement for them Piplani4ME76 Safeties for crankcase. Function of breather pipe,. Flash point of Lube oil Piplani4ME77 OMD alarm. What % OMD alarm will get activated? Piplani4ME78 Reversing of main engine. Lost motion principle Piplani




4ME79 Crankshaft deflection - How taken? How to draw the graph of Angle vs Deflection? How will you check misalignment is due?

Piplani

4ME80 Difference between turbochargers of 2 stroke and 4 stroke Piplani4ME81 ME Safeties Piplani4ME82 ME LO line diagram including cross head lubrication and piston return lines Piplani4ME83 How to calculate power? How it’s done on ship? How to calculate power if there’s no cylmate, no

digital indicator and no old school stylus! planimeter is not provided when the engine doesn't have a separate cam for taking power cards. instead sometimes electronic engine performance monitors are provided. but sometimes they are not..so then we find out power developed by using turbocharger rpm and then correlating it various graphs of other paramneters like scavenge temp and all.

Saini

4ME84 RT-Flex distributor reversing, how is it done, construction diagram Sharma4ME85 Draw card & indicator card difference. Then explain Draw Card Sharma4ME86 What is puncture valve? Sharma4ME87 Difference between ME & MC engines Sharma4ME88 Type of fuel pump in your ship and explain? Shirish Kumar4ME89 Why FQS lever is provided ? FQS- lever in SULZER engines. FQS is provided to adjust the ignition delay due to

bad quality of fuel in 2S engineShirish Kumar

4ME90 ME cooling water test, values and action Singh4ME91 Manoeuvring diag. (Asked for block diagram and safeties/ interlocks) Singh4ME92 Starting Air Line Explosion - a) What is it? b) Causes c) During manoeuvring starting air v/v

leaking how will you identify which one & what will be your action?Singh

4ME93 Tie Rods: Functions and Pre-Tensioning Method Singh4ME94 Fuel V/v Diagram and working Singh4ME95 Turbocharger Surging: explain what is it Singh4ME96 Main Engine Reversing- lots of cross questions Subramanian4ME97 How propeller torque is achieved? Subramanian4ME98 ME lub oil line diagram, showing all components in line? Subramanian4ME99 Hydrostatic Hydrodynamic Lubrication Subramanian

4ME100 Working of VIT? some cross questions Subramanian4ME101 Working of fuel pump? Subramanian4ME102 Reversing of main engine? Lots of cross question? Exhaust v/v cam need not be set to new

position? Why?Subramanian

4ME103 Draw power card, compression card, Difference between peak pr, compression pr, mean effective pr,

Tambvekar




4ME104 Difference between RTA engine and MAN MC engine There are still some differences in the lubrication arrangements. In MAN B&W, luboil is conveyed by means of telescopic pipes common for piston cooling and bearing lubrication, while in Sulzer, it is conveyed through an arrangement of hollow pins and articulated pipes, separate for each function.Another difference in lub oil system is MAN B&W has a common pump and pressure line for both main bearing and crosshead bearing lubrication. The luboil is admitted to the upper half of the crosshead bearings from where oil grooves lead the oil to the lower loaded half. Sulzer has some kind of pressure boosting arrangement using a second set of pumps to supply oil direct to the crosshead bearing loaded lower half. inorder to reduce bending moment of tie rods in rta jack bolts r used ...tie rods of mc engine do not tube and they do not go upto the bedplate.... cylinder lubrication of rta is accumulator pressure type

Trassi

4ME105 Safety of T/G and how will u check for over speed trip Trassi4ME106 How lubrication takes place in LMC engine? Crosshead lubrication. How so small pressure is

maintaining the oil film?Trassi

4ME107 Stroke to bore ratio of your engine, Trassi4ME108 How much was SFOC of your ship. Trassi4ME109 What type of lubricator in Sulzer RT FLEX? Trassi4ME110 Longitudinal cross-section of bellow of exhaust valve? Trassi4ME111 Piston clearances. Vaad4ME112 How reversing of main engine takes place? Draw how air distributor cam rotates in forward and

reverse direction? (basically the operating mechanism).Vaad

4ME113 Scavenge Space inspection. Vaad4ME114 RT Flex lubrication system Vaad4ME115 Stuffing box. Vaad4ME116 How reversing is achieved? Vinod4ME117 Why turbocharger? Can we run main engines without them? How? Vinod4ME118 All the clearances and why are they given? Vinod4ME119 Reversing in MC engines Vinod4ME120 OMD and its principle xyz4ME121 Checks to be made while crank case inspection xyz4ME122 Crank case explosion xyz4ME123 How to take all ME bearing clearance and what are the normal values of clearances? xyz4ME124 Piston crown checks xyz4ME125 Piston ring clearances xyz4ME126 Piston checks xyz4ME127 Cylinder head overhaul xyz4ME128 Tappet clearance xyz4ME129 Rocker arm maintenance xyz4ME130 Fuel pp onboard, type, parts,construction xyz4ME131 Main engine interlocks, xyz4ME132 Turning gear interlock, how it works? xyz




4ME133 Power imbalance and catalytic fines xyz4ME134 Draw manoeuvring diagram, tell the position of fuel cam while stopping and few more question on

it.xyz

4ME135 Draw lube oil circuit of your main engine and what are the alarms and trips provided for lube oil only for main engine?

xyz

4ME136 V/v timing diagram of 2-stroke, p-v diagram of same and draw card for 2-stroke and then the postion of TDC on draw card?

xyz

4ME137 How is chain case lubricated? xyz4ME138 How can the chain be tightened if it has become loose? xyz4ME139 What is the sac volume in a fuel injector? xyz4ME140 What is the pressure of lube oil at ME main bearings? Wasim Hussain N GUYS, YOU ARE CONFUSING LUB OIL LINE PRESSURE

WITH OIL PRESSURE AT BEARING! WHAT SURVEYOR WOULD BE INTERESTED IN LINE PRESSURE OF OIL? THE PRESSURE THAT WE SEE ON GAUGE IS ACTUALLY THE PRESSURE THAT IS MAINTAINED TO SUPPLY ENOUGH OIL TO EACH BEARING! ACTUAL OIL PRESSURE AT THE BEARINGS IS FOUND USING THE FORMULA: Brg Load = (mu) sq(N -rps) R L / C, Brg Pr = Load/Area

xyz

4ME141 The line from the expansion tank enter to the suction side or discharge side of the JCW pump and explain the reason for that

xyz

4ME142 Draw main engine lube oil line xyz4ME143 What is the purpose of having back flush filter in LO line? xyz4ME144 What is the pressure of lube oil at ME main bearings? xyz4ME145 What is VIT and cross questions? xyz4ME146 How reversing takes place? xyz4ME147 What type of lubrication used for thrust bearing? Hydrodynamic or hydrostatic lub? As thrust collar rotates it draws oil with it creating pressure and because of the

shape at the back of thrust pad it tilts pivoting on its inner edge.As a result oil wedge is formed for lubrication.Therefore hydrodynamic lubrication occurs

4ME148 LO test report from shore- what all are the contaminants? If iron n copper present in LO test report wat will you check in engine(which part)? If sodium is present what is the cause?

4ME149 Procedure for taking indicator card4ME150 How peak pressure measured in generator? Can we use same instrument for ME?4ME151 What is the material of crosshead bearing, telescopic pipe, articulated pipe?




4ME152 What is piston slap? Piston slap is nothing new to piston driven internal combustion engines and compressors. It is the secondary (sideways or perpendicular) movement of a piston against the side of a cylinder bore where the primary movement of a piston is intended to be parallel (up and down) to the cylinder bore. All piston driven internal combustion engines and compressors have a certain amount of piston slap. Excessive piston slap occurs when the clearance between the piston and the cylinder bore is too great. The piston to cylinder bore clearance becomes too great either through wear, mismatched pistons and cylinder bores at manufacturing or, a combination of both. The audible noise associated with excessive piston slap is due to the perpendicular impact of the piston against the wall of the cylinder bore. Audible piston slap is typically loudest when the engine is first started up. The pistons then expand with heat reducing the piston to cylinder bore clearance thus, reducing the perpendicular impact of the piston against the cylinder wall and its resulting noise.

4ME153 Not all ships are provided with planimeter. How to calculate power in that case? Also the procedure to find SFOC?

4ME154 MCR, NCR - Definitions? Your ship MCR. NCR?4ME155 Stresses in A/E and M/E starting frm piston to propeller?4ME156 The line from the expansion tank enter to the suction side or discharge side of the JCW pump and

explain the reason for that4ME157 How to check the integrity of piston rod gland without opening it?4ME158 Why 1.4mm lift is given for injectors? Why not more or less? this lift is needle lifts up in the injector during injection. if this is the lift which u are

talking about, then higher lift will impinge needle on its seat an damage takes place drastically. lower lift will reduce amount of flow of oil required.

4ME159 How is the Tie rod attached to the Bedplate?4ME160 What UEC stands for ? Wasim Hussain N U-Uniflow scavenging E-Exhaust gas turbocharging

C-Cross head type engine4ME161 How to find the elongation of chain in chain case? How to measure percentage elongation?

4ME162 What is Mark-1,2,3,4& 5 engine?4ME163 What is MC,ME,MCC,MCE?4ME164 What is oil analysis? How it can be used for engine condition monitoring?4ME165 How will you know without opening anything that it is two stroke or 4 stroke Engine?4ME166 What is priming of fuel injector?4ME167 Difference between lubrication of X-HD in sulzer RTA n B&W MC engines. Construction and

operational differences?4ME168 How to confirm exhaust valve rotation? In man bw , there is spring loaded rod or plunger which when removed from its

stowed position, stands upright on the damping piston which looks like inverted saucepan.This piston has a tapered crease. When the plunger is in contact with this, when the valve rotates the plunger goes up and down.That shows exh valve moving up and down and rotating.

4ME169 Why Pulse type T/C used in AE and Constant Pressure T/C in ME?




4ME170 How to adjust timing of cam shaft relative to crank shaft?4ME171 Difference between super VIT and VIT?4ME172 Difference between specific fuel consumption and total fuel consumption?4ME173 Excessive honing of liner will lead to? Wasim Hussain N failure of lub oil retentivity on liner which leads to damage of

piston rings nd liner due to lack of lubrication. excessive clearance b/w liner nd rings ,in severe cases blow past can take place

4ME174 What is supercharging? Construction of turbochager, function of each parts, 4ME175 JCW Expansion tank- why it is provided? Suppose oil is there from where it can come?4ME176 Difference between RTA engine and MAN MC engine There are still some differences in the lubrication arrangements. In MAN B&W,

luboil is conveyed by means of telescopic pipes common for piston cooling and bearing lubrication, while in Sulzer, it is conveyed through an arrangement of hollow pins and articulated pipes, separate for each function.

Another difference in lub oil system is MAN B&W has a common pump and pressure line for both main bearing and crosshead bearing lubrication. The luboil is admitted to the upper half of the crosshead bearings from where oil grooves lead the oil to the lower loaded half. Sulzer has some kind of pressure boosting arrangement using a second set of pumps to supply oil direct to the crosshead bearing loaded lower half. inorder to reduce bending moment of tie rods in rta jack bolts r used ...tie rods of mc engine do not tube and they do not go upto the bedplate.... cylinder lubrication of rta is accumulator pressure type

4ME177 6S60MC-C8 wat does C8 stand foR?4ME178 In man B&W L-MC engine I saw that the fuel recirculation was through the fuel injector when the

engine is stopped . Although on Sulzer RTA i was told that the recirculation takes place by keeping the suction valve open hence shorting the fuel through the pump itslef and no fuel goes thru the injectors. Any comments on the same?

there's a separate connection from fuel supply line (8 to 9 bars) to individual units fuel injectors.Per unit we have two copper line which is tapped and valves provided (one inlet and one outlet) So fuel from 9 bar line is taken and main line and given to fuel injector 1 then outlet is conected to fuel injector 2 then outlet of 2 is connected to inlet of 3 and outlet of 3 connected to main fuel oil return line .This was there as per my latest ship . Connections differ as per licensee.

4ME179 What is detuner? Detuner reduces the critical rpm.If critical rpm is near or above 75% mcr then it would be near operating point of the engine.So installation of de-tuner will shift the critical rpm in manoeuvring range of the engine like between half ahead and full ahead or between full ahead and 40 % mcr speed. Inside crankcase, in chaincase there are extra wheels which rotate in opposite direction and twice the speed , powered by chain in manbw




4ME180 Can any one explain the Main engine air fuel interlock, more specifically how does the air get cut off and fuel injected during starting of the main engine. any diagrams would be helpful

When start signal is given...electrical signal opens the start solenoid admitting the starting air to turn d engine. It cutsoff whn a predefined rpm reaches. Now, in case of Sulzer engines, air along with very small amt of fuel is used during starting. Whereas in MAN BW only air is used, and once tht rpm is reached, there is an overlap period of start n run signal as both the uswitches "start n run" r pressed together for 1sec to 1.5sec ensuring air n fuel admitted together for a positive start. ABOVE CONTENT IS AS EXPLAINED BY SAMANTH SIR. But if still it needs ne correction or if im wrong plz do correct me.

4ME181 MAN B&W 7K80MCC-MK6 ENGINE - MK6 IS THE MARK NUMBER. BUT WHAT IT INDICATES AND WHAT CHANGES ARE MADE IN ENGINE COMPARE TO SAME SERIES PREVIOUS ENGINE?

http://www.mandieselturbo.com/files/news/filesof6534/Press_Release_0022.pdf




4AE1 What to do if cam of fuel pump of one of d unit of Aux. engine is corroded? AK Sharma4AE2 Tappet clearance? How will you ensure that the v/v seats are closed (to take tappet)? Checking the push rods are loose is one method but the appropriate method is to

see that push rod roller is on base circle of the camIqbal

4AE3 Tappet Adjustment. How is it done? Where all it can be checked? What happens if wrongly adjusted? If no indication on flywheel, how will you do?

Kamath

4AE4 How to adjust compression pressure when generator is running? Narain4AE5 How is camshaft & crankshaft connected in A/E? Lubrication arrangement for them Piplani4AE6 How starting air is supplied to aux engine? Draw & explain. Function of air distributor. Piplani4AE7 Tappet clearance. Everything in depth (start to end) Sharma4AE8 4-stroke bottom end bearing clearance. How to take and position of piston? Sharma4AE9 Draw timing and PV diagram along with piston movements of 4 stroke engine? Dual, Diesel & Otto

cyclesSubramanian

4AE10 Draw/explain LO circuit for AE. How does liner get lubricated? (fav question) oil through gudgeon pin and splash Subramanian4AE11 AE - how fuel goes inside? Diagram? Injector overhaul? Trassi4AE12 Additives of A/E L.O.TBN of AE oil ? Trassi4AE13 Aux engine liner lubrication Vinod4AE14 Crankcase inspection in auxiliary engine, Vinod4AE15 How lubrication of liner is done in aux engine? Vinod4AE16 How to test lub oil trip and over speed trip in aux engine? Vinod4AE17 What impurities can be found in the LO of a generator xyz4AE18 How does A/E LO get dirty? xyz4AE19 How does piston gets lubricated in 2s & 4s? With figure xyz4AE20 Lube oil consumption increases of generator after 1000 hrs of decarb ? What all possible reason ?

4AE21 Overspeed Trip Testing for AE 1. SIMULATION: reduce the governor overspeed spetting to slightly above normal operating speed (eg: 750 rpm for 720 rpm rated engine). Then increase the fuel to the engine by either pushing the fuel racks or by governor knob or from the main switchboard. Remember overspeed is actually done on engines at no load. Refer manual for safety instructions as most of the manudfacturers specify to check con. rod bottom end bolt tightness after an overspeed trip. 2. ACTUAL: Just keep on increasing the fuel to the engine till the engine trips on overspeed (be cautious about rpm). To be little bit more elaborate: every engine has 2 overspeed trip settings. one is electrical and other is mechanical. Both are for the engine side and not for alternator. Electrical setting or trip will activate first and then if electrical fails then mechanical.

4AE22 Why 2 springs for 4S valve arrangement? Wasim Hussain N IT ALTERS THE NATURAL FREQUENCY, THEREBY MOVING AWAY THE CRITICAL / RESONANT FREQUENCY OUT OF NORMAL OPERATING RANGE, ALSO, IT EXERTS BALANCED FORCE ON VALVE AGAINST VALVE SEAT

4AE23 How to identify a unit at TDC without refering to flywheel marking?4AE24 Why gudgeon pin in compressor is fixed and free floating in AE?

FN 4B - AUX ENGINE & RELATED SYSTEMS

FN 4B‐ AE AND RELATED SYSTEMSCompiled by: WASIM HUSSAIN N



4AE25 Difference between auxiliary engine governor and main engine governor.4AE26 Why we cant reverse 4 stroke engine directly? main reason is v/v timing diagram. Engine can be reversed easily if v/v timing is

symmetric across bdc n tdc...For eg: 2 stroke engine with loop n cross flow scavenging can be easily reverse b coz ports timing is symmentric... But in case of 4 stroke engine valve timing is different wrt bdc n tdc. So reversing becomes complicated.

4AE27 Engine is running but not taking load. What may be the reason? Generator ? Load limit switch on governor has been set to zero. Set it at 10 for max load limit. In ME, VIT linkage disengaged due to fretting governor actuator erratic

FN 4B‐ AE AND RELATED SYSTEMSCompiled by: WASIM HUSSAIN N



4BL1 What is steam trap? Where is it located? Its function? Is there a strainer before it? AK Sharma4BL2 Position of steam trap in bunker heating steam line? AK Sharma4BL3 Feed water line diagram? How will u know oil on feed water line? AK Sharma4BL4 What is priming of boiler? AK Sharma4BL5 How may safety valves are there on Auxiliary Boiler and how does it works with diagram. Barik/Dastoor4BL6 What are all the safety checks u will carry out before starting a boiler? Barik/Mishra4BL7 Why vent provided on boiler? Barik/Mishra4BL8 Boiler mountings? Barik/Neti4BL9 Why easing gears? Barik/Neti

4BL10 Purpose of expansion tank. How to know the tank is empty or full, if you are not able to see the level in gauge glass.

Dastoor

4BL11 Purpose of boiler register draw n show Dastoor4BL12 Why 2 Boiler gauge glasses? How to find if both functioning correctly? IQBAL - JHA4BL13 About safety valve. Gagging of valve and its purpose. Kamat4BL14 If oil goes into the boiler how will u come to know? Already INSIDE the boiler Kamat4BL15 Boiler water treatment: how salt formation takes place though FWG water has salt content 2ppm? Kamat/Piplani

4BL16 Boiler water level is going down – reasons? (I said tube leak then he asked how to confirm) Kamat/Piplani4BL17 Boiler gauge glass blow down. Kamath4BL18 Boiler accumulation of pressure. Test of accumulation of pressure. What is importance of Boiler low

water level trip and alarm. How to try out /test?Kamath

4BL19 Types of boiler burner? Explain any 1? Mishra4BL20 Boiler furnace inspection, how will you prepare for that? Mishra4BL21 Draw Boiler feed water line. In which line is the feed water regulator? Is it in the main line or auxiliary

line?Mishra

4BL22 If one gauge glass show half level and other showing fluctuation what does it mean? Mishra4BL23 How to know if oil is there in boiler water? What are boiler water treatments? Piplani4BL24 pH of boiler water? Why alkaline? What acidity hazards? Scaling hazards? Piplani4BL25 What if Chloride contents increases? Piplani4BL26 Hydraulic pressure testing of boiler. Why & How? Piplani4BL27 What is soot? Why soot blow? Draw arrangement of soot blowers on your ship. Piplani4BL28 Draw cross section of boiler and all the feed water and steam outlet connection and where fitted

location-wise. Or Sketch boiler of your ship with all detailsPiplani / Vaad

4BL29 Safeties on Boiler? Singh4BL30 Boiler CW Test, Values & Action Singh4BL31 Boiler Water Treatment, what if chloride content increases, blowdown procedure, what if Chlorine

content continue to increase even after blowdown?Subramanian

4BL32 What is boiler steam temp? I said 100deg saturated steam? Then he asked- How does 100deg steam heat fuel oil up to 140deg?

Subramanian

4BL33 Boiler feed water line diagram Trassi / Barik4BL34 What type of steam trap on deck cargo steam line? Trassi / Barik4BL35 Hot well overflowing reasons Trassi / Barik

FN 4B MEOL - BOILERS

FN 4B+6 BOILERSCompiled by: WASIM HUSSAIN N



4BL36 Boiler water tests? Values? What to do when value rises? How is phosphate test done and why is phosphate test done?

Vaad

4BL37 What information is provided on safety valve? Vinod4BL38 Boiler safeties Vinod4BL39 There is no water in the boiler - What action will you take? Vinod4BL40 Boiler gauge glass, boiler leak off alarm why? Vinod4BL41 Why do you blow down boiler and how? Vinod4BL42 What do u mean by boiler panting?4BL43 What do u mean by boiler running in?4BL44 Purpose of ignition transformer?4BL45 Effects of water getting carried over boiler4BL46 Boiler double banking4BL47 How much was the pre and post purge time. Can u change that and how to find the min amount of

purge time(if there is no manual)?4BL48 What is boiling point of a liquid ?4BL49 nitrate in jacket water should be around 1400 ....what will happen if nitrate comes below this level. what

may be the reason of falling nitrate4BL50 Floating of boiler safety valve is done during drydock survey4BL51 How is boiler feed water control connected to boiler combustion control. 4BL52 Manual firing of boiler4BL53 Why feed water p/p lose suction if feed water temperature is too high?4BL54 How to adjust air fuel ratio in a boiler?4BL55 How to fire the boiler manually?4BL56 Methods for detection and taking out oil from hotwell?4BL57 What is Primary and Secondary Air Combustion in Boiler?4BL58 Why multistage pump for blr feed water?4BL59 What actions to be taken for the following-for boilers

1.low ph or acidic condition2.high alkanility3high tss4.hydrazine.

Low ph : add chemicals and increase alkalinity.High alkalinity: blowdown and take fresh water which will dilute and reduce alkalinityTss: to reduce scum and bottom blowdown Hydrazine : this is oxygen scavenger and addition of hydrazine will reduce oxygen from boiler water.

4BL60 What will happen if steam traps are not used in steam system? nothing happens if you dont use steam traps. u will increase losses as first latent heat of steam to water is not used . second since steam will return to your hotwell instead of hot water, that would seriously steam the hotwell. as the dump condensor is not designed to condense that amount of steam, hot well will be very hot and boiling.

4BL61 What is the voltage supplied to pilot burner in boiler and how ? pilot igniter voltage is in the order of 11,100 volts exactly. Don say 11000 volts. From 440V, a step up transformer is used and thus such high voltages are achieved at the electrode terminals to create a spark.




4BL62 Why rotary cup burner is preferred in boiler? The use depends on turndown ratio.Higher the load fluctuations higher is the need of turndown ratio.Rotary cup don't have high turndown ratio. They are used for almost same loads or very little load fluctuations.Means only for purpose of heating.When turbines r used such as copt or propulsion, high pressure and high load fluctuations are encountered so rotary cup burners are not used , instead pressure jet, y-jet. Etc are used.

4BL63 How would you find out if oil has entered inside the boiler steam drum? Oil in steam drum means that your hot well and cascade tank is also full of oil. This is a definite disaster. Hope you all must have seen that the boiler feed pump takes suction from bottom of cascade tank. If oil has managed to find its way into steam drum, then it is not traces, it is a major contamination and thus steam pressure would have dropped well before such happening. Boiler fuel consumption increases and steam pressure becomes erratic. In such situation, tubes will start to over heat and melting may start as temperature increases. Steam pressure may still be less. Oil detection probe/alarm installed in condensate observation tank . Sight glass at obs tank.Plus water doesn't overflow from top most level from observation tank to hotwell but at slightly lower level to compensate for some oil (if any) will remain in observation tank and not flow into hotwell. P alkalinity wil increase

4BL64 Prepurging & postpurging time for boiler? 2 min.... for purging which accomodates 4 times of complete furnace air change......

4BL65 Chloride content of boiler water: normal range? According to drew chemical sheet which I have used, it says low pressure boilers upto 7 to 8 bars, chloride can be upto 300 ppm. Of course lesser the better.However as pressures go high the acceptable limit comes down.High pressure boilers it goes down 50ppm. for 16 bar = 150 ppm...for 30 bar = less than 50 ppm

4BL66 What is the purpose of a gland steam? As steam performs work on the system giving out enthalpy and driving the turbine, the pressure of the steam or enthalpy decreases, temperature falls etc.In order to obtain same work done per unit area, as pressure drops thru the stages of turbine the area of turbine blades has to increase, hence lp is bigger than hp. When pressure falls to such a level that air ingress starts at the end of turbine , we give 0.2 bar steam for not allowing air to go out nor steam to come out from the turbine into engine room.




4BL67 Hide-out It can be seen in high pressure boilers that as the steaming rate increases the levels of certain salts, particularly phosphate salts, does not raise in line with others. When the load is reduced the concentrations return to normal. This is termed hide-out and is due to the reduced solubility of sodium phsophate at temperatures above 250'C When phosphate hide-out occurs there is a risk of permenant scal deposition and/or evolution of free caustic which in turn could lead to severe corrosion due to caustic attack Treatment using volatile solids free chemicals such as hydrazine, Eliminox and neutralising amines should be considered. This is termed All Volatile Treatment

(AVT)

4BL68 Why are the two safety valves in a boiler set at different pressures ? practically it is not possible to set at same exact pressures. We tried to. But there was some error..That is why class gives an allowance of 3% between the safety valves. If you can set well and good. If not this 3% is for human error allowance. Not only in marine industry - we follow DOT and Boiler Norms which used ashore. Also remember if you set at same pressure, then you would waste too much water.

4BL69 Types of steam trap . Working . Purpose and location steam traps allows latent heat of steam also to be extracted from return steam. as steam trap doesnt allow steam to pass through, the steam condenses into water in the pipeline itself, the condensed water is able to lift the valve in steam trap. secondly the hotwell will not steam up as return will be hot water rather than steam

4BL70 REASON FOR BOILER FEED WATER CASCADE TANK OVERFLOW WHILE MANOEUVRING? Swapneil Tamhankar : Mismatch between steam generation amd steam requirement. In order to maintain or prolong boiler pressure without the need to fire it, when boiler pressure rises too much, we open more steam to bunker tanks, these bunker tanks situated in fwd , midship area will have condensate in their return line as well as in steam inlet line, this water comes back to cascade tank and overflows the cascade tank. TO AVOID THIS: Do not open too much any steam to a tank which has very long steam line and return line. If we open a lill bit, then steam will make the water before steam trap into steam first, so your inlet is completely filled with steam so half the work is over.Do not open more than one tank at a time, ensure system is stable first, then crack open second tank steam inlet . And so on and so forth

4BL71 Why a high lift safety valve is called high lift safety valve? The ordinary safty vlv usd to lift d/36. Latr high lift vlv came it had waste piston arrangement it liftd d/24. Nd now we hv improvd high lift it lifts d/12 with floating ring and waste steam piston. Hence v use 2 so that atleast v get a total lift of d/6 .

4BL72 Why at start the air damper after pre purge cycle not closed fully? U need air for fuel to burn.But u don't want to extinguish the flame when it ignites.So we keep supplying air at minimum rate. Plus if u close it fully while fd fan is running, it would overload the fan to an extent.

4BL73 What is wing clearance in boiler safety valve? wing clearance = lip clearance4BL74 Boiler precautions to be taken before starting.




USEFUL LINK http://www.dft.gov.uk/mca/mcga07-home/shipsandcargoes/mcga-shiptype/dops_-_all-newpage-33/ds-newpage-76.htm

6BL1 Why you open vent of boiler during cold starting Sharma6BL2 Boiler gauge glass blow through procedure Singh6BL3 What will you do if one of the boiler gauge glass is showing very low water level and PID controller how

it works?Mishra-Barik

6BL4 On-board your ship boiler automation failed, safety valve not lifted. What will be your immediate action? How will you continue boiler at low firing rate - If your boiler fuel oil pressure control valve is not working?

Piplani

FUNCTION 6: MREL - BOILERS




4RF1 How will you detect moisture in ref system? What will u do to remove it? AKSharma4RF2 What is condenser and evaporator pressure? AKSharma4RF3 State of refrigerant before and after TEV? AKSharma4RF4 What is short cycling and reasons? AKSharma4RF5 Explain TEV? AKSharma4RF6 In refer plant if there is oil in the evaporator, how will you clean it? Barik/Dastoor4RF7 Detailed drawing of refrigeration system Kamat/Piplani4RF8 Reasons for domestic refrigeration not undergoing HP trip. Kamath4RF9 Refrigerant used in air conditioning system? Kamath

4RF10 Reefer plant. Why back pressure v/v? What is the function of solenoid? Kamath4RF11 Cut in cut out -cross questions Kapoor4RF12 Low refrigerant - How will you get to know? Kapoor4RF13 Leakage detection. You carried out leak test rectified and still refrigerant is leaking. Why and from

where?Kapoor/Mishra

4RF14 Capacity of recovery bottle? Refrigeration recovery units contain a vacuum pump, which can work to very low vacuums (less than 1 torr), and a condensing unit, which allows the gas to be removed, condensed to a liquid and stored. The unit has either its own (internal) recovery refrigerant container (usually 13 kg) or is connected to an external cylinder (13, 26 or 55 kg). These cylinders are supplied in various colours, the colour may indicate which refrigerant it contains, but it should, in every case, have a yellow band or section around the cylinder neck to indicate that it contains recovered refrigerant.

Mishra

4RF15 Reefer short cycle Mishra4RF16 A/C not providing cooling. Reasons? Mishra4RF17 Ref charging methods? Where is the point for charging? Where else you can have the point to charge

the refrigerant? Explain method of chargingMishra

4RF18 Loading & unloading of AC compressor - Explain Mishra4RF19 Difference between AC compressor & Air compressor unloader Mishra4RF20 Why in Refrigeration system there is Equalising line? What about which is not having Equalising line-

How superheat is created in it ?Mishra

4RF21 Difference between AC compressor and air compressor crankcase design and its venting arrangement ?

Mishra

4RF22 Reefer compressor unloading with diagram Mishra/Trassi4RF23 Draw refrigeration cycle and principle of refrigeration? Narain4RF24 Refrigeration lines- Overcharging, short cycling, what if moisture is present? Where heat is added and

where heat is removed in refrigeration system?Piplani

4RF25 Procedure of refrigerant charging (gas) in ac plant, and what precautions are taken for personal safety? (he wanted to listen hand gloves of leather nd never use rubber hand gloves)

Piplani/Singh

4RF26 Working of TEV? Sharma4RF27 Location of drier in domestic reefer Sharma4RF28 Domestic Refrigerator Compressor type Singh

FUNCTION 4B : MEOL - MARINE REF & AC

FN 6 ‐ MROL ‐ EVERYTHING ELSECompiled by: WASIM HUSSAIN N



4RF29 Draw refrigeration cycle? Lots of cross question on this. What is latent heat etc? Everything he wanted to know is how?

Subramanian

4RF30 Safeties on reefer. Why belt driven? Trassi4RF31 Difference between cut out and trips in reference to refrigeration plant ? Cut out is regular operational feature. It needs to manual reset. It resets

automatically. Like LP CutOut / Cut in. But Trips are fault isolation feature... they need to be manually reset after identifying cause.. Like HP Cut Out or LO Low Pr cut out

Trassi

4RF32 How A.C system capacity control takes place? Vaad4RF33 How to fill Lub oil in a refrigeration compressor?4RF34 How is the load decided on AC compressor and how does it work?4RF35 How is the cold room temperature maintained?4RF36 Whats the difference between air compressor lube oil and refer lube oil properties?4RF37 Air vent of refrigeration & air compressor difference?4RF38 Difference between LP cutout and LP controller?4RF39 what is cascade refrigeration system. tell me construction, how temp is maintained to -165 degree.

4RF40 Lube oil charging in ref compressor durin running, Construction of charging v/v4RF41 What all parameters to be checked in a refrigeration compressor?4RF42 What are the reasons for suction line getting hot/ cold?4RF43 Frosting in the suction line... Causes?4RF44 What is a back pressure valve? And where it is used?

6RF1 AC compressor short cycling reason Mishra6RF2 Ref compressor- air is present- What will happen? Bhalla/Shirish6RF3 How to charge refrigerant in the system? Mishra/Nair6RF4 Type of compressor for AC on your ship? Was vent provided in crank case on it? Kamath

FUNCTION 6: MROL - MARINE REF & AC




4PF1 Purifier overflowing reasons Barik/Neti/Mishra

4PF2 Boiler blowdown procedure? ( we don’t want the v/v & v/v seats of ovbd & boilerside v/v to get corroded, hence we first open ovbd v/v then boiler side v/v, then we open the v/v in between these two v/vs & control blowdown by this v/v)

Iqbal

4PF3 What is main function of gravity disc? What shape? What passes through, what effect of its sizes, how it exactly controls oil water interface? What will happen with wrong selection? How to select exact size?

Kamath/Piplani

4PF4 Principle of purifier, draw diagram, why it is necessary to heat the oil, temperature you maintained on your ship for FO and LO? And why that much temp only?

Kapoor

4PF5 How to start purifier? Mishra4PF6 Approach towards rectifying a fault in the purifier and what if oil is leaking? Saini4PF7 How to select gravity disc? Sharma4PF8 Why we stop purifier with the help of hand brake everytime? To quickly pass critical rpm. No separate arrangement to avoid it Trassi4PF9 e line in purifier Trassi

4PF10 Why brake on purifier? Trassi4PF11 Why purifier brakes are applied during stopping. Is there any arrangement that the critical speed is

bypassed very fast for purifier. Ans is no. Trassi

4PF12 Why do we apply break to purifier at the time of stopping? And what is the arrangement to overshoot the critical rpm at time of starting?

Trassi

4PF13 Why brake is given to purifier? Trassi / Barik4PF14 How is the vertical shaft and horizontal shaft of purifier alligned?4PF15 What is the function of the friction clutch mechanism used in purifiers?4PF16 Safeties on Purifier4PF17 Purifier working principle4PF18 Manual desludging of Pfx?4PF19 Safety in purifier ? Light phase HT alarm

Overflow alarm/tripMotor overload/currentBack pressure drop shutdownExcess vibration shutdownLow sealing / control water trip"Fuel feed low temp, high temp, low/high pressure alarmOil in water alarmBowl speed low/high.Feed flow lowVibration sensorWater pressure high (closing water and outlet)

FN 4B MEOL - PURIFIERS

FN 4B+6 ‐ PURIFIERSCompiled by: WASIM HUSSAIN N



6PF1 Purifier overflow, Bhalla/Shirish6PF2 Purifier speed not building after start. Bhalla/Shirish6PF3 Purifier - how the shaft is connected to the motor? what are the arrangements for that? Kapoor6PF4 What are friction pads? How are they placed and arranged? Kapoor6PF5 In the running purifier how will u come to know that the friction pad is wear down? Kapoor6PF6 What are imp parameters in purifier? Explain its effects. Mish/Nair6PF7 Purifier not desludging – reasons & actions Mishra6PF8 Why a Purifier vibrate? What is there to control it? Mishra6PF9 Purifier overflowing reasons? Differences in conventional Alfa Laval and ALCAP purifier? Saini

6PF10 Purifier leaking; reasons Shirish6PF11 Oil from water side of purifier Shirish6PF12 Gravity disk selection Shirish6PF13 Purifier Overflowing, what all things will you check? Probable causes of overflowing Subramanian6PF14 Purifier Dissembly Subramanian6PF15 What exactly is the paring disc? Is it centripetal pump or water paring device? Given differently in

Alfa Laval & McGeorgeWasim Hussain N "PARING" in English means 'spreading or distributing evenly (equally) or making all even (equal)'. I guess, I don't have to explain water paring disc now? ;) In alfa laval, oil is also being collected evenly by another 'paring disc'. In Selfjector, that's called centripetal pump. In the newest Alfa Laval purifiers we have instead, oil paring tube which is spring loaded against inlet pipe and positions itself as per oil water interface and picks up oil.

FUNCTION 6: MROL - PURIFIERS

FN 4B+6 ‐ PURIFIERSCompiled by: WASIM HUSSAIN N



4CA1 Why compressors are there in more than one stage? (Lots of cross questions on this) Barik4CA2 Why we use intercooler & after cooler? Iqbal4CA3 Bumping clearance and cross question. Kamath4CA4 What all factors effect vol. efficiency? Kamath4CA5 Air compressor overhaul and valve overhaul. How to test its properly overhauled? Kapoor4CA6 Bumping clearance. What will happen if it is more and if it is less? How is it? Majum/Narain4CA7 PV diagram for Air compressor - Difference between Isothermal/Adiabatic Compression Majum/Narain4CA8 Multistage compression, why, operation, principle, what type of compressor Majumdar4CA9 Compressor unloader working, if 1st stage suction and discharge v/v leaking what will be the

effect, how lubrication is done, profile for lubrication in comp crankshaft, exact profile.Mishra

4CA10 WHAT ARE DIFFERENT TYPES OF COMPRESSOR VALVE?AND PLS DONT TELL HP AND LP AND IF VALVE SEAT GOES HOW TO REPAIR ? CAN WE LAP VALVE SEAT?

Mishra

4CA11 Compressor 2 stage PV diagram Sharma4CA12 Compressor specifications and inspection inside crankcase Singh4CA13 Where safety valve is fitten? Which side and why? Singh4CA14 Compressor safeties Singh/Kamath/Vaad

4CA15 Multistage Compression, PV Diagram, Safeties. Subramanian4CA16 Starting air bottle safeties Vaad4CA17 What happens when the fusible plug melts? Vaad4CA18 What all you will check in air compressor crankcase?4CA19 Why is an air compressor started unloaded?4CA20 How does the air compressor start and stop automatically?4CA21 What will happen if the suction and discharge valve of air compressor got interchanged after

overhaul?no air would enter the compressor bcoz in normal case, suction valve is in the position of air to open from the top, if its interchanged wit the discharge valve which is designed to open while air acts from the bottom, it would not open and compressor would not produce any pressurised air!!!

4CA22 Will the reciprocating compressor work, if direction of motor changes? Explain? Theoretically It will run, but the LO & CW P/p will not run leading to LO & CW no flow trip ...

4CA23 In a two stage tandem air compressor adjusting the first stage bump clearance will effect the bump clearance in the second stage,so how does it work out?

no 1st stage bump clearance adjustment do not effect the 2nd stage clearance coz u add a gasket or shim in first stage at the cylinder head cover bottom...but if u adjust the 2nd stage clearance den it'll definately affect the 1st stage coz u have 2 add shims at d foot of connecting rod..

4CA24 Can we use shims to adjust bumping clearance in air compressors?4CA25 How does the air compressor start and stop automatically?

FN 4B MEOL - COMPRESSED AIR SYSTEMS

FN 4B+6 ‐ COMPRESSED AIR SYSTEMSCompiled by: WASIM HUSSAIN N



6CA1 Compressor Valve Inspection. IQBAL-JHA6CA2 If vlvs of air comp are leaky what will happen? Indication of 1st stage discharge vv leaking? Kamath

6CA3 MAC capacity reduced & longer time to fill up the bottle. Reasons? Kamath6CA4 How to start air compressor in manual Mishra6CA5 Compressor taking time to fill the bottle, reason? Mishra-Barik6CA6 Compressor intercooler use? Draw 2 stage on graph? What is that graph called? Paul6CA7 Starting Air Compressor Safeties Singh6CA8 How will u come to know that your main air compressor is working efficiently, if your 2/E tell you to

check the efficiency, what all things u will check?Subramanian

FN 6 MROL - COMPRESSED AIR SYSTEMS

FN 4B+6 ‐ COMPRESSED AIR SYSTEMSCompiled by: WASIM HUSSAIN N



4PP1 Multi stage pump and its diagram, Barik4PP2 NPSH of pump Barik4PP3 Class survey of ballast pump what are your preperations Barik4PP4 While you stop purifier it starts vibrating - What could be the reason other than critical speed? Barik/DastUr4PP5 Casing ring & wear ring location its function Barik/Dastur4PP6 How multistage centrifugal pumps connected in parallel &series? It’s application Barik/Dastur4PP7 OWS 3 way valve testing Barik/Dastur4PP8 Different types of pumps used in engine room Barik/Neti4PP9 Rudder drop. Why rudder drop happens? Jumping Clearance Barik/Neti

4PP10 Where you will use centrifugal pump and where you will use reciprocating pump? Barik/Neti4PP11 What is NPSH? Factors affecting NPSH? Iqbal4PP12 Draw diagram of gear pump. Iqbal4PP13 Why Pump Vibrates? IQBAL - JHA4PP14 OWS - how it works? What principle? Why do you fill it with sea water? Mishra4PP15 If you start main sea water pump and it trips wht are the reasons? Narain4PP16 Centrifugal p/p - clearance between wear ring & casing Piplani4PP17 Cargo pump type and their bearing lubrication, details Sharma4PP18 If there are two different types of cargoes in two adjacent tanks- one greater than another. Pump is tripping

on overload which discharging higher SG cargo. So how will you discharge cargo of that tank? (Something else, other than heating and cooling)

Sharma

4PP19 Where emegency bilge suction is fitted ? Which pump and why? How will you test? Who will test? Procedure Singh

4PP20 Mechanical seal diagram and function. Function of lantern ring in centrifugal pumps. Subramanian4PP21 Bilge line not taking suction? Trassi4PP22 Centrifugal pump - part names Trassi4PP23 If you start main sea water pump and it trips. What are the reasons? Trassi4PP24 How to start sea water pump? Check load, electrical part, freeness of motor, coupling etc Trassi

4PP25 Centrifugal p/p cross-section, working and for some reason diag of rotation. Wear ring. Gland. Vaad4PP26 Difference between mech seal and oil seal? XYZ4PP27 Bunker line pressure test bunker line pressure test with air - 6 monthly done by ship staff.

hydrostatic pressure test done by shore staff with certificate provided, uscg requirement only, need not be done if ship doesn't call US ports. that is done by water and then air pressure. it is not done on entire bunker line but only the part which cannot be seen between weather deck and the part where it emerges into the engine room. certification is necessary part for this testing.

4PP28 Why gear pump not used for emgcy fire pump as it develops high pressure?4PP29 Difference between centrifugal and gear pump4PP30 How to check the correct working of 15 ppm alarm?

FN 4B MEOL - PUMPS AND PUMPING SYSTEMS

FN 4B+6 ‐PUMPS AND PUMPING SYSTEMSCompiled by: WASIM HUSSAIN N



6PP1 Bilge pump suddenly lost suction. What will u check first and after that? Barik/Neti6PP2 Clearances in Gear Pump to be checked? Majumdar6PP3 Wear Ring replacement procedure? Majumdar6PP4 Wear ring use? Clearance? (0.3 mm) Paul6PP5 Draw mechanical seal? Uses? Paul6PP6 Centrifugal pump O/H checks? Paul/Sharma6PP7 Replacement procedure for Mechanical seal Sharma6PP8 All S.W. pumps are shut also valves are shut. Start sequence by sequence dont forget to say will check for the freeness of the motor and

pump couplingTrassi's fav

6PP9 What is the purpose of spring in mechanical seal?6PP10 How to select gland packing?6PP11 Sea water on ME lube oil pump – what is your action?

FN 6 -PUMPS AND PUMPING SYSTEMS

FN 4B+6 ‐PUMPS AND PUMPING SYSTEMSCompiled by: WASIM HUSSAIN N



HY1 What is Safematic system? Barik/MishraHY3 Hunting gear, oil flow and safety in steering gear. KamatHY4 Steerig gear test before departure MishraHY5 Hydraulic system of windlass. What is the hydraulic symbol of pump and motor? TrassiHY6 How winches operated on your ship? TrassiHY7 What are the primary purpose of hydraulic fluid on board? TrassiHY8 Difference between steering gear motor and other motors onboard steering gear motor does not have a overload trip whereas other motors

have. it will not trip on single earth fault...n take 200% overload. steering

gear motor is connected to INS (insulated neutral system)...unlike other

motors which are connected to ENS (earthed neutral system). purpose is

same as told by nishant sharma...i.e. it will not trip on single earth fault. i.e.

minimum two earth fault will be required for trip to happen.

HY9 Why the high pressure line (eg: Steering gear system) has Square type flanges and not round ??Mishra

HY10 Draw the 4 ram steering gear and explain how it works? How are the pumps controlled? MishraHY11 What is 100% redundancy? MishraHY12 What are the follow up,non follow up,and automatic systems of control systems in steering gear?

Mishra

4FW1 Vacuum loss occurred in fresh water generator. How will you come to know without pressure gauge?Barik/Dastur

4FW2 Fresh water generator principle? The saturation temperature of water is directly proportional to the vapor pressure of the liquid, as the pressure decreases, the saturation temperature of water decreases, thereby if we reduce the pressure well below vapor pressure of the liquid at certain temperature, evaporation takes place. Pressure & Temperature are related by Gay-Lussac's Law : p1/t1 = p2/t2

Kamath/Shirish

4FW3 Start the fresh water generator, principle of fresh water generation, working of ejector? Kapoor4FW4 How will you start FWG? Mishra4FW5 Fresh water generator.working. Eductor pump working.Salinometer working.. Mishra4FW6 FWG not producing vacuum - Reasons Shirish4FW7 Fresh water generator working and problems Singh4FW8 Principle of FWG? Reverse osmosis and vacuum FWG? Subramanian

4EE1 What is plasticity & elasticity? Barik4EE2 2E asks you to cut threads using lathe. How will u carry out the job? Speed of lathe machine? Tools

used? Piplani

4EE3 Steering gear failure. It is not responding from bridge – Causes? Piplani/Nair4EE4 What is the maximum angle did your hose lifting crane moved? Trassi4EE5 Difference b/w cut-out & trip? Trassi

FUNCTION 4B : MEOL - STEERING GEAR & OTHER HYDRAULIC SYSTEMS

FUNCTION 4B : MEOL - FWG & FW SYSTEM

FUNCTION 4B : MEOL - EVERYTHING ELSE

FN 4B ‐ MEOL ‐ EVERYTHING ELSECompiled by: WASIM HUSSAIN N



4EE6 Why air vents are provided in tanks? Vinod4EE7 What is jumping clearance? http://www.marinewiki.org/index.php?title=Rudder_-_Swing_test xyz4EE8 What are the types of welding? xyz4EE9 How many seachest on board, why high sea chest in port?4EE10 Difference between relief valve and safety valve?4EE11 In bunker analysis report what all items are given? (he need details of impurities)

FN 4B ‐ MEOL ‐ EVERYTHING ELSECompiled by: WASIM HUSSAIN N



6MAE1 How to take butt clearance? Barik6MAE2 Gen exh temp onboard Barik6MAE3 Cooling water temp, pr onboard Barik6MAE4 Lub oil temp and pr onboard Barik6MAE5 How to measure ovality of conrod? Barik/Dastur6MAE6 How piston crown distortion measured? Barik/Dastur6MAE7 Function and checking of rotocap during overhaul Barik/Neti6MAE8 Liner calibration Barik/Neti6MAE9 How will you take butt clearance? Barik/Neti/Sharma

6MAE10 What all checks you will make on piston when removed during decarb? Barik/Neti/Sharma/Subramanian

6MAE11 Checks in Crankcase inspection? (Lots of cross questions on this) Barik/Subramanian

6MAE12 Piston checks and clearances Bhalla/Shirish6MAE13 Air cooler dirty - How will you come to know? Air Cooler cleaning Bhalla/Shirish6MAE14 How do you conclude your liner has got crack? Iqbal6MAE15 How frequently you clean scavenge valves? Iqbal6MAE16 Draw valve timing diagram of your ship n explain. Iqbal6MAE17 Engine Holding down bolt torque IQBAL-JHA6MAE18 Crankcase Inspection. IQBAL-JHA6MAE19 Why Secondary Explosion in Engine? IQBAL-JHA6MAE20 Cylinder head overhaul of AE Kamath6MAE21 Overhauling of fuel valve of both aux and main engine. Kamath6MAE22 Tappet clearance.in detail. Kamath6MAE23 How is piston calibration done in A/E (start from when you stop the engine as in he wanted to hear all the safety precautions) Kamath

6MAE24 How butt clearance is taken Kamath6MAE25 Reasons for excessive LO consumption (he wanted answer regarding oil scraper ring worn out) Kamath6MAE26 What type of edge does the oil scrapper ring has? Kamath6MAE27 What is surging? Then went deeper into surging topic came to surging graph about

surge line & on graph what is plotted against what?Kamath

6MAE28 If exhaust gas of M/E for a particular unit has gone up what are the reasons? Kamath6MAE29 How to adjust the tappet clearance? Kamath6MAE30 Have you taken crankshaft deflection in aux. engines? Where do you fit dial gauge

and how it stays there? What locations to take deflections?Kamath/Piplani

6MAE31 How the inlet and exaust valve lapping in done? Kapoor6MAE32 Liner calibration - how is done? Kapoor6MAE33 Crank case inspection of main engine? Kapoor6MAE34 Full generator decarb? Butt clearance/ tappet clearance. Kapoor/Kamath6MAE35 Liner gauging Mishra6MAE36 Cyl head decarb - What are the things you will check? How will you clean all

passages?Mishra

6MAE37 Scavenge temperature of 1 unit increasing – reasons & actions Mishra/Nair

FN 6 - MROL - MAIN/AUX ENGINES AND RELATED SYSTEMS

FN 6 ‐ MROL ‐ MAIN/AUX ENGINES AND RELATED SYSTEMSCompiled by: WASIM HUSSAIN N



6MAE38 Generator not starting on air , reason? Mishra-Barik6MAE39 How will you take crank shaft deflection. Why we take two readings in BDC not

exactly on BDC reason,Mishra-Barik

6MAE40 Tappet clearance procedure? Can you take tappet clearance of no. 1 unit inlet valve on different angles of flywheel other than normal tappet angle on flywheel?

NARAIN

6MAE41 Tappet checking? If fitter does that, how will u verify that he is doing it properly? Paul6MAE42 How to take compression pressure on running generator? What do u know by taking

it? How will you take it?Paul

6MAE43 How reversing takes place? Piplani6MAE44 How to take Bottom end bearing clearance in aux. engine? What position is correct? Piplani/Kamath

6MAE45 ME main bearing bottom half end removal procedure? Saini6MAE46 Crank web deflection taking procedure? How to take bottom readings? (Wanted to

listen about the use of mirror)Saini

6MAE47 LO testing Sharma6MAE48 Stuffing box if butt clearance decrease and no spares Sharma6MAE49 Working of stuffing box? For what used? Sharma6MAE50 Crank case explosion Sharma6MAE51 Scavenge temperature of 1 unit increasing – reasons & actions Shirish6MAE52 Crankcase inspection Shirish6MAE53 Bottom end bearing checks after taking out con rod. Shirish6MAE54 How is con rod bolt fitted in bottom end bearing and checks made on it? Shirish6MAE55 Piston ring; what all clearances are taken and their significance? Shirish6MAE56 Scavenge piston space inspection and conclusions Singh6MAE57 Tie rod tension - how u will check? Procedure? Singh6MAE58 M/E Decarb: Piston and Liner (only checks to be made on piston and liner calibration

and ovality)Singh

6MAE59 How to check tappet clearance? At what degree of crankshaft? How u will know without flywheel marking, without fuel pump inspection window, that your correct position is reached??

Subramanian

6MAE60 What all clearances to check in piston rings, how to take, where to take? Subramanian6MAE61 How will you come to know that piston rings blow past, when engine is running? &

after opening crankcase?Trassi

6MAE62 Checks made on a new liner before replacing xyz6MAE63 How to put a new liner in a unit? xyz6MAE64 How to take out the old liner? (whole procedure from removing exhaust valve) xyz6MAE65 Indication of scavenge fire xyz6MAE66 How to measure Compression pressure of AE?6MAE67 Hw to check main brg clearance of Aux. engine of underslung crankshaft?6MAE68 How will you check main bearing clearance for aux engine? What particular angle

you prefer and why that angle is important?6MAE69 One unit exhaust temperature high during your watch, course of action?




6MAE70 Methods for measuring TAPPET CLEARENCE in AE Dial Gauge Method: -In this method the fuel injector is taken out and from the opening a dial gauge is put inside. Then the turning gear is engaged and the engine turned over. The pointer of the dial gauge will move in one direction and then stop and start in opposite direction. The moment the pointer of the dial gauge stops and changes its direction of movement is the TDC of the unit. This method is not normally used in day-to-day practice, but may be used in the calibration of the flywheel if it is not calibrated, or after some repairsCamshaft Method: -The camshaft window of the engine can be opened up and the camshaft inspected. The cam of the engine has a base circle, and acceleration and dwell periods. If the roller of the follower is at the base circle, then the particular valve is closed by spring action. When both the exhaust valve and the inlet valve follower are on the base circle, then the unit is also at TDC. It must be remembered that as a four-stroke engine has two rotations of the crankshaft there is one injection TDC where the injection and the combustion take place. The second time the piston is at TDC is when the exhausting of the flue gases takes place. It is very important to identify the combustion TDC, as tappets have to be adjusted at that point.Crankcase Method: -In this method the crankcase doors are opened up and the piston is visually checked whether is going up or down. This is the surest method, but a bit cumbersome. It should be used when you have a strong doubt about the other methods.

Valve Spring Method: -This is not an independent method but is used in conjunction with the flywheel method. In this method if the flywheel is indicating two units, you can check the springs of both the units. The unit in which the springs are loose is the one at TDC. The caution is that this method is useful for an engine in use. If you have removed the rocker arms during the overhaul and thereafter you want to use this method then it can cause Push rod method:-in this method the push rod will rotates or free to move at the time of compression or power stokes,u will get this from flywheel marking,Fuel pump timing method:-in this method open the window of inspection door fitted in pumps,when the punching mark is coincide with the mark of pump,ie injection timing,the valves r closed in this time, during this time we will check the tappet clearance

6MAE71 Routine maintenance of auxiliary engines6MAE72 AE clearances ... bottom to top .. and how to take the gudgeon pin clearances.6MAE73 How to detect crankshaft bending? (He wanted to hear crankshaft deflection)6MAE74 What is wedge formation in liner at what position?6MAE75 How to know that there is instrumental error from crank web deflection and readings?




How your engine measures NOx(engine parameter)? Swapneil Tamhankar 3 methods1) Engine parameter check method- need to have technical file which states components responsible for nox.- record book of engine parameters-Eiapp certificate

2) Simplified measurement method- onboard verification tests are done during periodical and intermediate surveys,Deviations are to be with 10% of applicable nox limits listed in nox technical file.

3) Direct measurement and monitoring method

-sensors installed and records parameters,-last 30 days dats have to be stored.Procedure for direct measurement is In MEPC.103(49)

Ship owners are free to use any method of their choice.

On my 9 ships in career I have seen only the first method , engine parameter check method as the method used.




All certified engines are delivered with an individual Technical File that contains the engine’s specifications for compliance with the NOx regulation, and the applicable onboard verification procedure. The certification process includes an emission test for compliance with the NOx requirements on the manufacturer’s test bed

There are three on board verification procedures which can be used The method used is initially decided by the engine manufacturer, and is usually a specific chapter in the engine’s Technical File.Engine parameter check methodSimplified measurement methodDirect measurement and monitoring methodThe engine parameter check ensures that the present state of the engine corresponds to the specified components, calibration or parameter adjustment state at the time of initial certification. The engine’s Technical File identifies the components, settings and operating values that influences the exhaust emissions and these must be checked to ensure compliance during surveys and inspections. The components and settings will be those which affect the NOx produced by the engine, such as:Injection timingInjection system components (nozzle, injector, fuel pump)Injection pressureCamshaft components (fuel cam, inlet- and exhaust cam)Valve timingCombustion chamber (piston, cylinder head, cylinder liner)Compression ratio (connecting rod, piston rod, shim, gaskets)Turbocharger type and build (internal components)Charge air cooler/charge air pre-heaterAuxiliary blowerNOx reducing equipmentThe Simplified measurement method is where the NOx content of the exhaust gas is measured during a 20 minute full load run of the engine. Due to the possible deviations when applying the simplified measurement method, an allowance of 10% of the applicable limit value is accepted for confirmation tests and during periodical and intermediate surveys.

For the direct measurement and monitoring method, the engine will be fitted with a direct measurement system which monitors the NOx emissions, either as spot checks logged regularly or continuous monitoring. Records must be kept for at least 3 months and must have been taken in the past 30 days.




MEP1 Engine room temp BarikMEP2 How to convert Celcius to Fahrenheit BarikMEP3 My body temp BarikMEP4 Steam line leaking in bilges - how will you rectify ? Barik

MEP33 Why is the service tank temperature maintained @ 98 deg and just before fuel pump/fuel injector it is brought to 145-148 deg? Why not maintain service tank @ 145-148 deg?

Wasim Hussain N Major reason - Can lead to thermal cracking of fuel Bhalla

MEP5 Overhaul the sea water suction strainer and add lots of problems in it. KamathMEP6 The oil filter in emergency gen is jammed by which tool you will remove it without KamathMEP7 What is SDNR? How will u lap the valve seat and valve lid? What are the KapoorMEP8 LO Cooler leak - How to find? Mish/Nair

MEP28 Reamer, dye, hack saw, function, type , profile, how will you order? MishraMEP9 During sailing bridge reported that steering gear is not responding in both auto

pilot and manual steering. What will you check if your steering gear is of latest Piplani

MEP10 Hydraulic jack working with simple diagram. PiplaniMEP11 Welding of two metal pieces of diff thickness. What will you do for the surface

preparation of those two metal pieces?Wasim Hussain N In short, I would say, If the difference between thickness is more than 3mm (or 4mm) or 25% of thickness of thinner plate, a taper is made on thicker plate of length of taper = 4 times(diff in thickness). Theres more to it. Google that question and go for a link from VERISTAR. It mentions relevant regulations from Bureau Veritas.

Piplani/Nair

MEP12 Hot oil filter cleaning procedure that lies in main engine fuel line system? SainiMEP13 Your duty as a 4th engineer on ship? SainiMEP14 Bunkering sample analysis report; what all is there? ShirishMEP15 Difference between safety and relief valve ShirishMEP16 What are catfines and their relevance? ShirishMEP17 Draw SDR vv. How the spindle is attached with vv? Trassi's favMEP18 Overhauling of procedure of SDNR valve . How to open if bonnet is stuck? Trassi's favMEP19 Overhauling of SDRV. Valve not coming out with valve stem. Tapping and jacking Trassi's favMEP20 Least count of a 0-1inch outside micrometer xyzMEP21 Plate type HX overhaul xyzMEP22 Bearing nomenclatureMEP23 Different methods of fixing a leaking pipe - atleast 3MEP24 How to calculate least count on micrometer?MEP25 How will you order a high pressure pipe? Material and property? Construction?MEP26 How will you replace joint in SW line without removing pipeline? Swapneil Tamhankar Tool called as flange separator, it works similar to wedge. Then you have chemical

called as joint remover( ask in store) , it actually burns the joint. This procedure is for without removing pipeline and making a gap between the flanges.

MEP27 If u have 200 MT in tank and another bunker came of 500 MT and your tank capacity is only 400 – what will you do?

MEP29 Sea water pipe , leakage at pipe flange edge and not possible to isolate, how to MEP30 What is pin gauge?MEP31 What is the composition of brass ,bronze and gunmetal?MEP32 What is the type of lubrication in Gears?MEP34 Why the cap of sounding pipe is spring loaded??

FN 6 - MROL - EVERYTHING ELSE




EL1 What is the function of commutator in DC motor? BarikEL2 What is Fleming’s law? BarikEL3 What are the emergency generator requirements as per SOLAS? How will you confirm that the

emergency generator has come on load within 45 seconds?Barik

EL4 How to carry out insulation resistance test? BarikEL5 MSB safeties? (Lots of cross questions on this) BarikEL6 AVR with diagram BarikEL7 Brushless gen with diagram BarikEL8 Reverse power trip with diagram BarikEL9 Limiting value of IR at which motor will keep on running with insulation leaking Barik

EL10 Megger testing, how to connect probes BarikEL11 How current moves in a conductor. BarikEL12 What is the difference between AC & DC? BarikEL13 Compare AC & DC with stresses. BarikEL14 What will you do if there is low insulation when you start a motor. How will you correct it Barik/DastoorEL15 Overhaul of motor Barik/DastoorEL16 Alarm or trips on steering gear motor. Barik/DastoorEL17 Maintenance on Alternator Barik/Dastr/MishEL18 Safeties on MSB Barik/Dastr/PiplaEL19 Reverse power trip & testing Barik/DasturEL20 Power factor definition. How will u calculate it? Barik/DasturEL21 Wheat stone bridge principle. How it’s balanced? Relation between R1 R2 R3 R4 Barik/DasturEL22 Megger why used? How to test its working? Types of megger? How does it measure insulation when you

are setting a voltage range on it? How will the dynamo work on non-battery type?Barik/Mishra

EL23 Type of transformer in welding machine? Barik/MishraEL24 What is function of fuses? Barik/NetiEL25 Different kind of fuses Barik/NetiEL26 Motor protection Barik/NetiEL27 Open circuit fault Barik/NetiEL28 Earth circuit fault Barik/NetiEL29 Reverse power trip Barik/NetiEL30 Generator safeties Barik/NetiEL31 Protection in motors for short circuit Barik/NetiEL32 Safeties on MSB? IQBAL-JHAEL33 Earth fault indication alarms activated. What step you will take? IQBAL-JHAEL34 Black out occurs on your ship. What will be your action? IQBAL-JHAEL35 Paralleling of Alternator: Conditions and Manual procedure Iqbal-W'kdeEL36 What is single phasing? Iqbal-W'kdeEL37 Paralleling of generators? (mention all the 4 conditions) Iqbal-W'kdeEL38 Preferential trip Iqbal-W'kde

FN 5 - EECEOL

FN 5 ‐ EECEOLCompiled by: WASIM HUSSAIN N



EL39 Power factor Iqbal-W'kdeEL40 Trickle charge Iqbal-W'kdeEL41 Actual electrical parameters on-board your ship and cross ques Iqbal-W'kdeEL42 What is IP number? What the two digits of it indicate? What was the IP number for motor in the engine

room, and for MSB?Kamath

EL43 What is Insulation resistance? What is the temperature value for class F insulation? KamathEL44 What is earth fault? Why it occurs? Is there any system to monitor in continuously? What is the minimum

value of it is allowed?Kamath

EL45 What all ratings of motor are given on its nameplate? KamathEL46 What is IP for MSB? KamathEL47 IP and significance for motor, what was IP of E/R motors in your ship? KamathEL48 Induction motor principle. KamathEL49 Starters, why it is required? KamathEL50 Star delta starter diagram and explanation. KamathEL51 AVR diagram and working. Why it is used? KamathEL52 Reverse power trip KamathEL53 Preferential trip, what are essential and non-essential loads? KamathEL54 Zener diodes. KamathEL55 Intrinsic circuit. Where it is used? KamathEL56 Explosion proof motor and where it is used. KamathEL57 Safeties on overhead crane. KamathEL58 Electrical hazards. KamathEL59 Fire class motors . KamathEL60 Overhead crane limit switch value. KamathEL61 Star circuit. Power calculation. Power factor. What is phase angle? KamathEL62 Safety of ESB. Same as MSB + 1.it shud b in the vicinity of the emergency gen. 2.

Above upper continuous deck, aft of the collision bulkhead, and shud hv easy access from open deck. 3. Dont forget to tell it shud b dead front type.

Kamath

EL63 Emergency generator Safety. KamathEL64 Types of batteries? Sp Gr? Voltage? Reaction? How will you know battery fully charged? What battery

on board? It's rating? What is voltage for charging? (26V) Battery maintenance? Hydrometer? Principle of Hydrometer?

Majumdar

EL65 What all types of power supply on board? Why 440V in ER and 220/110V in accommodation? Why not opposite?

Majumdar

EL66 Types of motor on board? Principle? Synchronous vs induction motor? Where synchronous motor used? Majumdar

EL67 How to parallel generator? How do you know incoming generator in phase? Synchroscope diagram? Fleming left and right hand rule? Lenz’s law?

Majumdar

EL68 Under voltage trip diagram MishraEL69 If two generators are sharing equal load but amps are different MishraEL70 How is electricity produced? From where it is tapped? MishraEL71 General electrical safeties? Mishra




EL72 What general safeties you will find in a starter box or near the starter box? Told him abt fuses and then said there is a rubber mat on the floor near the starter box and indications So he said rubber mat is the requirement now ……..

Mishra

EL73 Esb safeties 440v earth fault alarm MishraEL74 220v earth fault alarm MishraEL75 Battery charging failure alarm MishraEL76 IR alarm MishraEL77 How is earthing given to the ship? What is NER? What purpose? If not given what would happen? Mishra

EL78 How is earthing given on the shore? MishraEL79 Starter maintenance? MishraEL80 How to test insulation resistance? On the whole what should be the value for entire ship how much it

should be? How will you check it for the motor ?Mishra

EL81 ESB 440v supplied to ? MishraEL82 Emergency generator : means of starting MishraEL83 Paralleling, MishraEL84 Synchroscope diagram MishraEL85 Transformer principle MishraEL86 MSB block diagram MishraEL87 MSB safeties: Physical and Electrical PiplaniEL88 Emergency generator starting requirements, procedure PiplaniEL89 Power management system block diagram and working PiplaniEL90 Induction motor working diagram and principle PiplaniEL91 Battery maintenance PiplaniEL92 Battery Room Safeties PiplaniEL93 Draw explosimeter Piplani/KamathEL94 What are safeties in E/R overhead crane? What is fail set mechanism? Piplani/KamathEL95 If electrical cargo p/p is der on your ship and you are discharging cargo of Sp.Gr.1. Motor current is 400

A, you change over cargo tank and new tank is of cargo whose sp.gr is 1.8. What will happen? (I tried answering - the pump power consumption will be more so more current will be drawn by motor, if more than over current trip will occur so reduce the discharge rate ) he said he don’t want to reduce the discharge speed then? He gave me another clue that if 2nd cargo pumping draws 600 A current and trip is set at 550A then what will u do? Kamat Sir asked me to use basic engineering knowledge

Piplani/Kamath

EL96 What is intrinsically safe equipment? Piplani/KamathEL97 How do you measure SG of battery acid? Then what is Hygrometer? What is working principle of

Hydrometer & Hygrometer?Hydrometer for SG, Hygrometer for humidity In air Narain / Majumdar

EL98 E/R crane safeties SharmaEL99 E/R crane motor safeties. Fail-safe of brake & Brake Diagram. Sharma

EL100 Alternator routines Sharma

EL101 If your generator working ok but alternator not producing proper voltage? (avr) Sharma




EL102 Motor maintenance (Megger IR check etc) Sharma

EL103 Motor safeties Sharma

EL104 Motor speed control Sharma

EL105 Difference between synchronous motor and induction motor Sharma

EL106 Synchronous motor where used in ER Sharma

EL107 Synchronising how done dark lamp etc circuit diagram Sharma

EL108 MSB safeties Sharma

EL109 What happen if generator overload? Sharma

EL110 Preferential trip in detail Sharma

EL111 Emergency supply goes to where Sharma

EL112 Power factor in detail Sharma

EL113 How to calculate on-board power factor? Sharma

EL114 When we get power factor=1? Sharma

EL115 Ships Power Supply system (No diagram but verbally explain it is combination of S/bs, Transformers, fuses, contacts, CBs, diff voltages etc.)

Singh

EL116 Why Starters fitted- function of DOL Starter? Remember he wants to hear that starter not only for reducing starting current but it is one of the safety-because DOL doesn’t reduces starting current).

Subramanian

EL117 What is Isolation Transformer? Subramanian

EL118 Principle of Transformers- what happens to current and voltage during transformation? Subramanian

EL119 Draw and explain Brushless Generator. Residual Magnetism etc Subramanian

EL120 Navigation Light Panel. Subramanian

EL121 Motor Safeties. Subramanian

EL122 Single Phasing, How will you come to know which phase has gone, how will you test? Subramanian

EL123 Megger working. How to test IR resistance. Why you can’t use multimeter for the same?? Subramanian

EL124 How to use megger, multimeter and tong meter? Tambvekar

EL125 Safeties of MSB, why 0.6 m gap is given behind Tambvekar




EL126 Battery checks Tambvekar

EL127 Procedure for entering battery room Tambvekar

EL128 Insulation resistance, minimum acceptable value Tambvekar

EL129 Open circuit fault Tambvekar

EL130 What are the ESB safeties as per SOLAS Trassi

EL131 What is MCB and what all trips are provided on MCB Trassi

EL132 What type of fuses is used in ER? If HRC fuse is blown off what test will u carry out? Trassi

EL133 What is reverse power trip and how will u carry out the test to check the trip is working? Trassi

EL134 How to check reverse power trip? Prime mover will be running or not? Then take the gene again on load. Trassi

EL135 Types of fuses? Explain semi enclosed? Is semi enclosed present in ship? Trassi

EL136 Power factor. Lot of cross questions Trassi

EL137 Types of fuses in engine room, how to test a ceramic fuse, what position will you keep the knob of multimeter when testing the fuse? ans is on continuity or resistance,

Trassi

EL138 What type of crane on deck? Trassi

EL139 MCB trips, Trassi

EL140 How to check that a 3 phase motor is star or delta connected just by looking at the terminals. Draw the arrangement.

Trassi

EL141 Types of motor use in engine room INDUCTION MOSTLY, VERY FEW APPLICATIONS OF DC MOTOR (GOVERNOR) AND SYNCHRONOUS

xyz

EL142 Types of induction motors xyz

EL143 Lead acid batteries its safety battery room ventilation xyz

EL144 Welding circuit xyz

EL145 Single earth fault, short circuit fault xyz

EL146 Short circuit fault safeties xyz

EL147 Navigation lights – AC / DC? xyz

EL148 DC motor on board? xyz

EL149 Difference b\w AC and DC motor? xyz

EL150 Rectifier? How it works? Example?? xyz




EL151 Transformer? Working? xyz

EL152 Megger testing xyz

EL153 How to detect earth fault? xyz

EL154 Generator trips xyz

EL155 Alternator trips xyz

EL156 Describe preferential trip xyz

EL157 Electric principle of welding xyz

EL158 How emergency generator does comes on load when main power fails xyz

EL159 Synchroscope function xyz

EL160 Power distribution system with diagram xyz

EL161 Why is a Megger used for insulation test and not a multi meter? With a megger,a voltage of not less than 500 volts DC is used for testing the insulation resistance of windings. With a multi-meter, the voltage used is not more than 3-volts DC. Megger uses high impedance testing and is therefore more accurate than a multi-meter

EL162 How do you test reverse power trip? When two generators are running in parallel and one generator can carry the load, reverse power trip can be tested by load shifting using governor control. When the load has shifted sufficiently and the off loaded generator is carrying a small percentage of load, its breaker trips and fuel supply to its prime mover cuts off. This means reverse power relay has operated. The relay can be tested by simulation (using the test push button on the relay) to see if it initiates a trip signal. Simulation and actual both can be used to test.In actual change controls to manual. Reduce load one one gen and increase on other. Reverse power will trip at - 10% of rated power .

EL163 Why do we close the switch at 11 o'clock and not at 12 o' clock? When the synchroscope is approaching 12 o'clock the "slip" (differential) between the sine waves is approaching minimum (slip is zero when the synch'scope is at 12 o'clock) and the voltage differential between the phases is minimal (it's zero when the synch'scope is at 12 o'clock). Due to time taken to close the synchronoscope switch, it is generally done at 11 o’clock. Due to the small delay to close, by doing at 11 o’clock, we are achieving closing close to 12 o’clock.

EL164 Where and why is it used? Used for power factor correction as a synchronous capacitor.




EL165 How is the speed of a DC motor varied? To vary the speed of a DC motor we need a constant voltage power supply with a series POT resistor of higher watt rating. A Pulse Width Modulator (PWM) can be used.

EL166 What does three-phase current mean? Three current sinusoidal waveforms equal in magnitude but with a phase shift of 120 degrees.

EL167 After a black out the emergency generator comes on; On restoring the main supply we are closing the circuit breaker of the main generator without bothering about synchronizing. How is this possible?

There is a power link connection breaker between the main generator and the emergency generator. During black out, this breaker trips. The emergency generator starts and its breaker closes and feeds only the emergency loads. During restoration, the main generator is started again and its breaker is closed. As the link breaker is still open, there is no paralleling between main and emergency generator. Ask E/O for more details.

EL168 How is the speed of a 3-phase induction motor varied? The speed of a normal 3-phase induction motor is a function of the frequency of the supply voltage. Changing the speed of such a motor hence requires building a 3-phase power frequency convertor. This can be realised by using power MOSFETs (or IGBTs) capable of handling high voltages and fast switching speeds.

EL169 What safety precautions need to be taken during maintenance on batteries? The room needs to be ventilated to prevent explosions due to gases generate by the battery. Protective clothing, gloves and eye protection should be used to prevent acid splash over. No flames or ignition sources should be brought near batteries. Never short both positive and negative terminals as this will cause short circuit and high energy flashover. When disconnecting batteries, always disconnect negative terminals first and vice versa when reconnecting.

EL170 Explain the condition for Paralleling of Alternators? The following conditions must be fulfilled for proper synchronizing of alternators.The terminal voltage of the incoming machine must be approximately equal to bus-bar voltage.The frequency of the incoming machine must be equal to that of the bus-bar.In the case of 3-phase alternators an additional requirement is that phase sequence of the incoming machine voltages must be the same as that of the bus-bars.

EL171 If you get an earth fault alarm what will you do? The fault can be investigated by first identifying areas of ship that have a high chance of earth fault (example deck lighting or pantry equipment) and then switching off their supplies one at a time to see if the alarm is gone. When a particular load clears the alarm, we know that that circuit is having earth fault and we can go and repair it.




EL172 How does current flow during welding? The current flows through the electrode and to the clamp. That's how it flows in MIG, stick, flux cored. On Tig, the electricity flows through the electrode also except that now that's the only function of it, the rod is held in your hand and electrode in the other.

EL173 What is an AVO meter? The Avometer was a British brand of multimeter, latterly owned by Megger. It is often called simply an AVO and derives its name from the first letter of the words amperes, volts, ohms

EL174 What limits the electrical load? The available power is fixed and the voltage is fixed, so the setting of the breaker or fuse is the normal current of the load. If the load exceeds the rated current, then the breaker or fuse will operate and limit the load.

EL175 What is the meaning of saying I and V are in phase? The angle between the I and V waveforms is zero which means the load is purely resistive.

EL176 Where is it used? Synchronous motors find applications in all industrial applications where constant speed is necessary. Improving the power factor as Synchronous condensers. Electrical power plants almost always use synchronous generators because it is important to keep the frequency constant at which the generator is connected. Low power applications include positioning machines, where high precision is required, and robot actuators.

EL177 What are the differences between synchronous and induction motor?* Synchronous motor : Constant speed on all loads, can be operated on a wide range of power factors, not self starting, requires dc excitation.Induction Motor : Speed varies with load, operates on lagging power factor, self starting, no dc excitation required.

EL178 What are the safety precautions when working on electrical equipments? Switch off power, wear proper protective clothing, safety shoes, Notice board : Do not switch on – Men at work, stand on rubber mat, remove metal rings, watch bracelets, use proper insulated tools, check power supply with voltmeter and double check the voltmeter with known power supply, keep one person stand-by with proper safety gears, inform authority and get proper work permit. In case of electrical shock, give proper first aid, check heart beat and pulse.

EL179 Why is special lighting used in battery rooms? Spark proof lighting is used as explosive gases may be generated during battery charging and so there should be no sparks in the room. Ask E/O for more details.




EL180 Where is a slip ring used and where is a commutator used? Slip rings are commonly found in slip ring motors, electrical generators for alternating current systems and alternators. They can be used on any rotating object to transfer power.A commutator is a common feature of direct current rotating machines. By reversing the current direction in the moving coil of a motor's armature, a steady rotating force (torque) is produced.

EL181 When does Reverse power flow? Situation of a generator is feeding a system through switchgear having several generators connected in parallel with this generator. The flow of current, when the system is running normally, is from the generators to the switchgear. If one generator experiences problems and its terminal voltage falls below the system voltage, the generator will act as a motor, just as a motor can act as a generator, and current will flow from the switchgear to the generator. This is reverse power. The effects can range from minor to extreme in the event of a complete mechanical failure of the

generator which fails.

EL182 What protection is provided against this? Single phasing can be identified by special protective relays which can identify and isolate the connected loads. Smaller motors rely on overcurrent and negative phase sequence relays. Motor protection relays for larger motors come readily fitted with protection against single phasing.

EL183 What is special about Steering gear Overload safety? Short Circuit protection and were appropriate-single phase protection is fitted. In addition instead of over current protection an Overload alarm is fitted set to operate at not less than twice normal running current. ALSO ASK YOUR SHIP E/O FOR INFORMATION.

EL184 What is rms value? Root mean square value is the peak value divided by square root of 2

EL185 How is the protection against reverse power given? Reverse power protection is used for anti-motoring. This function is used for protection of prime mover not generator. It can cut-off the fuel supply and stop the prime mover.

EL186 Where does reactive power go? Reactive power is not 'lost'. It is delivered to the motor where it sustains the electric field that enables the motor to convert the real power (electrical) into mechanical torque.

EL187 What is the meaning of preferential trip? Why is it provided? Preferential trip is a kind of electrical arrangement on ship which is designed to disconnect the non-essential circuit i.e. non-essential load from the main bus bar in case of partial failure or overload of the main supply. It lets the critical loads run (like steering gear) and trips the non essential loads (like AC and galley) and is a safety feature




EL188 What is the meaning of power factor? Power factor is the cosine of the angle between voltage and current waveform.

EL189 How can it be improved? Power factor improvement capacitor banks are used if the loads are mainly resistive.

EL190 What is the benefit of improving power factor? Power factor close to 1 means for the same real power in kW, the load current is less and hence the I2R losses are less. The system efficiency is higher as the losses are lower. Improved voltage regulation is achieved.

EL191 For a given line voltage, four heating coils will produce maximum heat when connected in- Parallel

EL192 If a motor is wound star and you want to change to delta what should you do? Open the terminal connection box. Remove the shorting link connecting the common connection (star) point of A2, B2 and C2. With the 3 phase windings marked A1A2, B1B2, C1C2, connect A2 to B1, B2 to C1 and C2 to A1.

EL193 What is the voltage used for ignition in boilers/incinerators etc.? Normally 10,000V (10kV) - incinerator and around 19k in boilers

EL194 What can be possible reasons for a motor failing to start? No power , Fuse blown , Overload trip, contactor coil burnt , Contactors contacts bad, control circuit relay faulty, stop switch open circuit and start switch does not operate, hold on contact does not make and motor burnt.

EL195 Explain what happens if a DC motor is fed with AC supply? Motor will run at low speed, sparking at brushes, heat due to eddy current will finally burn the motor.

EL196 Why is 440 V used for motors and 110/220 V used for lighting? Motor load currents are large. Motors are 3-phase loads. A higher 440V voltage means lesser current for the same power and hence losses and size of cable wires is lower. Lighting is single phase loads and its load currents are small, hence lower voltage means less insulation in the cable wires. Ask E/O for more information

EL197 How to test emergency generator widout switching off main supply Many methods1. Simulation switch2. Tie breaker on esb to be switched off3. Tie breaker on msb switched off.Any one can be used

EL198 Is the alternator connected star or delta Look up in Dennis T Hall. Also in your ship ask E/O. Normally star.

EL199 Compare between lead acid and nickel-cadmium batteries? Lead acid : Dilute H2SO4, spongy and PbSO2, low efficiency, 2 volt per cell, less strong, requires more maintenance, less efficient wrt temperature, discharges fast, low cost, problem of sulfation.NiCd : KOH, Ni & Cd, high efficiency, 1.2V per cell, robust, less maintenance, more efficient wrt temp difference, retains charge for longer periods, expensive, no sulfation.

EL200 Why are motor ratings given in KW and that of alternator and transformer given in KVA? kW is the output mechanical power of a motor and is expressed in kW.kVA is the net (apparent) power input to the transformer. This input power is the output + losses.kW = kVA x system power factor




EL201 What is a self-monitoring alarm circuit? It self monitors the health of the alarm circuit. That is, it senses whether the power supply to the alarm circuit is healthy and all the relays and contacts are functioning normally. Check with E/O for more details.

EL202 What is Under-voltage protection? It prevents closure of the breaker by mistake, or the generator that is coming on load during parallel operation. It also provides protection against loss of voltage while machinery is connected to the switchboard.

EL203 Why is it different from that for welding? It is higher as the ignition requires break down of air gap for park to occur. The air breaks down at this high voltage of 10kV. Therefore, it is higher than normal welding voltage.

EL204 How does the emergency generator start automatically? It is activated by a under voltage relay. When there is blackout, the under voltage relay senses loss of voltage and starts up the emergency generator. Similarly when the power is restored, the relay stops the emergency generator. Ask E/) for more details.

EL205 What is the purpose of the earth fault indication on the switch board? It detects and indicates phase to earth fault on a circuit.

EL206 There is something done to bearing pedestal of an alternator, what is it? Insulation pads made from nylon are fitted under each pedestal bearing and the bearing holding down bolts are similarly insulated. MAGNETIC INTERPOLES producing opposite ampere turns fitted which minimizes effect of stray magnetic fields causing reduced emf in the shaft.

EL207 What is a diode? In electronics, a diode is a two-terminal electronic component with asymmetric transfer characteristic, with low (ideally zero) resistance to current flow in one direction, and high (ideally infinite) resistance in the other. A semiconductor diode, the most common type today, is a crystalline piece of semiconductor material with a p-n junction connected to two electrical terminals

EL208 Sometimes, when you change the running direction of a E/R blower (from supply to exhaust) it trips. Why?

If the flaps of the blower are not set or opened properly or the filters are clogged, the air supply is affected and the blower may be overloaded causing it to trip. Ask E/O for more information.

EL209 If all your air bottles are at low pressure and there is a blackout how do you start the generators? If main air bottles are empty, the emergency air bottle can be used to start the main generator. If even the emergency air bottle is empty, then it can be filled by running emergency air compressor (powered by emergency generator). Once the emergency air bottle is filled, this air can be used to start the main generator.

EL210 What is the function of a fuse? Fuse places a limit on the amount of current that can be drawn by an electric circuit by opening (blowing or melting) when the current exceeds a preset limit. This protects the circuit and the surroundings from fire or damage in the case of an overload or short circuit.




EL211 What is the regular maintenance done on batteries? Every week the cell voltage is checked. The specific gravity is monitored using the battery hydrometer. The terminals are lubricated to prevent corrosion. Sometimes load tests are done on the batteries. Ask E/O also for more information.

EL212 Purpose of AVR During KVAr loading, voltages of alternators falls which can be gained by AVR, which increases the excitation until voltage is back to normal . (NEEDS FURTHER INPUTS & REVIEW)

EL213 How does this cause a rotation to change? Due to the change in phase sequence, the rotating magnetic field changes direction and the rotor rotates in the opposite direction.

EL214 How is protection provided for OL and SC? Damage from short circuits and overloads can be reduced or prevented by employing fuses, circuit breakers, or other overload protection, which disconnect the power in reaction to excessive current. The tripping time is much less (in milli seconds) for short circuit due to very high currents but can higher (a few seconds) due to currents say 1.1 to 1.5 times the normal current.

EL215 What is a current transformer and voltage transformer?* Current transformers used for sensing load currents and as inputs to indicating instruments. Voltage transformers used for step-up / step-down voltages.

EL216 What is a relay? How is it different from a magnetic contactor? Contactor is a heavy duty switch whereas the relay is light duty switch. Relays can be as simple as 12 V DC solenoids with 12 V, 0.5 A rated contacts. They are used to detect faults on the power system and signal a local or remote switching device (breaker) to trip the circuit.

EL217 What is colour code of resistors , Please explain ? Colours to denote value. In four band colour coding, the first band indicates the first digit, the second band : the second digit and the third band : the number of zeroes.The values are as given below:Black : 0, Brown : 1, Red : 2, Orange : 3, Yellow : 4, Blue : 5, Green : 6, Violet : 7, Grey : 8, White : 9.

EL218 What are the safeties on MSB? Circuit breakers, fuses and over current relays are used. The panels are dead front panel, that is, we cannot open the panel for maintenance until we switch off the power to the panel by circuit breaker.

EL219 What is capacitance? Capacitance is the ability of a body to store an electrical charge. Any body or structure that is capable of being charged, either with static electricity or by an electric current exhibits capacitance. C = Q/V where Q is the charge and V is the voltage

EL220 Even though the main engine runs at varying speeds, how does the alternator maintain constant frequency?

By use of thyristor controlled frequency (rpm) converters.

EL221 How is this voltage achieved? By connecting 12 cells in series. 12 x 2 V = 24 V is total battery bank voltage.




EL222 How is the direction of rotation varied? By changing the phase sequence (from say R-Y-B to R-B-Y)

EL223 What is the harm if reverse power flows? Assume that the generator normally produces an amount of power equal to P, and that when operating as a motor, it will absorb a similar amount, P. Therefore, the net effect on the grid will be the same as if it experienced a step increase in load equal to 2P. Depending on the size of the grid and the strength of the remaining generation, a step increase of 2P could result in a significant frequency change on the grid.There could be prime mover damage in some instances (especially steam turbines).

EL224 If you press the ACB Close button on an idle generator what will happen? Ask E/O. Normally, the breaker won’t close until you synchronise, so even if you press the breaker close, it will not close. The breaker has under-voltage protection which will not let you close it.

EL225 Apart from renewing bearings is there any reason for opening up motors for maintenance? Ask E/O. Insulation checks and renewal (example using insulation spray on stator winding insulation)

EL226 What is the meaning of overload? An overload is a current over and above the normal load current (over the load). In other words greater than the original design current. This can be a momentary overload such as the starting current for a motor which is usually ignored or it can be a sustained overload such as plugging in too many appliances at once or a motor that has faulty bearings or gets jammed

EL227 What is an induction motor? An induction motor is an alternating current motor in which the primary winding on one member (usually the stator) is connected to the power source and a secondary winding or a squirrel-cage secondary winding on the other member (usually the rotor) carries the induced current.

EL228 What is the meaning of excitation in an alternator? An electric generator or electric motor consists of a rotor rotating in a magnetic field. The magnetic field may be produced by permanent magnets or by field coils. In the case of a machine with field coils, a current must flow in the coils to generate the field, otherwise no power is transferred to or from the rotor. The process of generating a magnetic field by means of an electric current is called excitation.

EL229 Permanent magnets are generally made of- Alnico alloys

EL230 What is the full form of ACB? Air circuit breaker. It is normally used at 400V and higher current applications (generator breakers).

EL231 What is the meaning of ACB, MCCB, NFB? Air circuit breaker for 400V higher current ratings.Moulded case circuit breaker for 400V medium current ratings.No Fuse Breaker – 75 A capacity




EL232 What is a synchronous condenser? A synchronous condenser is a device identical to a synchronous motor, whose shaft is not connected to anything but spins freely. Its purpose is not to convert electric power to mechanical power or vice versa, but to adjust conditions on the electric power transmission grid. Its field is controlled by a voltage regulator to either generate or absorb reactive power as needed to adjust the grid's voltage, or to improve power factor.

EL233 What is meaning of short circuit? A short circuit occurs when conductors are connected (shorted) together by a fault. This is normally phase to phase fault due to failure of insulation by something cutting the wires, fires, etc.

EL234 How is the direction varied? A general purpose DC motor can be reversed by changing the polarity of either the armature or the field but not both.

EL235 What is a magnetic contactor? Where is it used? A contactor is an electrically controlled switch used for switching a power circuit, similar to a relay except with higher current ratings. Contactors are used to control electric motors, lighting, heating, capacitor banks, and other electrical loads.

EL236 What does different position of the synchroscope needle mean; what is the difference between 6 o clock and 12 clock?

6 o’clock means that out of synchronisation. We cannot parallel the incoming generator. 12 o’clock means the perfect synchronised condition (voltage, frequency and phase sequence match).

EL237 What is the voltage used in a meggar? 500V DC.

EL238 What is the full battery voltage ? 24 V DC.

EL239 What is the voltage available from each cell in a lead acid battery? 2 V DC.

EL240 What is the specific gravity of electrolyte used in lead acid battery? 1280 at full charge and 1180 at discharge.

EL241 What is the best value possible? 1 is the best value possible. That is possible with a purely resistive load.

EL242 Out at sea, if there is a black out during your watch, what action will you take? <Refer company manual for detailed procedure>

EL243 Why generally we use induction motor on board, not synchronus motor? Easy to make. Serves our purpose on board. Easy to operate. Singly excited ac supply is more than sufficient to start and rotate the motor. Induction motors are Used where speed control is not a priority at all but continous running, easy start motors are needed. (ref Theraja for details)

EL244 What is the usual value you see onboard? 0.8

EL245 Can reverse power trip occur with one generator running? If yes, how? If no, why?

EL246 Short circuit and Earth fault: Define




EL247 Star-Delta starter: No diagram jus explain why used on-board

EL248 What is KVA?

EL249 What is meant by phase in AC?

EL250 Why is DC not much in use now?

EL251 Where are you likely to see DC used?

EL252 What is a semi conductor?

EL253 What is doping?

EL254 What happens to insulation when temperature rises?

EL255 What are Superconductors?

EL256 What happens to resistance of conductors when temperature rises?

EL257 What is "slip"?

EL258 What is a synchronous motor?

EL259 How do you use a multimeter?

EL260 How do you check continuity?

EL261 What do we use for welding on ships? AC or DC?

EL262 What is the voltage?

EL263 Does current flow through hull during welding?

EL264 If so why don't you get a shock?

EL265 What is safe voltage to prevent shock?

EL266 What is the meaning of earthing in a ship?

EL267 What is the meaning of Star winding/ Delta winding?

EL268 Is the ship's alternator Star wound or Delta wound?

EL269 Can you draw a DOL starter circuit?

EL270 What is the normal setting of overload relays?

EL271 How does a thermal overload relay work?




EL272 What is single phasing?

EL273 How can it happen?

EL274 What is the harm caused by this?

EL275 Why is it necessary that incoming alternator frequency is more than bus bar?

EL276 What is dark lamp and bright lamp method for synchronizing? How is the connection made?

EL277 Why is this reverse power used instead of reverse current in alternators? CURRENT IS REVERSING DIRECTION EVERY HALF CYCLE IN AC

EL278 Is the field current in an alternator AC or DC ?

EL279 Is the field rotating or stationary?

EL280 How is it supplied?

EL281 What is a brush less alternator?

EL282 How is the excitation achieved in this?

EL283 What is the meaning of residual magnetism?

EL284 What is a zener diode?

EL285 What is a thyristor? What is an SCR?

EL286 How does an inverter work?

EL287 How does a tube light work?

EL288 What is the function of the choke?

EL289 What is the difference between neutral and earth?

EL290 If the AVR, is defective, when additional loads come on will the generator be able to take it?

EL291 How do you test reverse power trip, high current trip, preferential trip?

EL292 Why is a capacitor used in single phase motors, fluorescent tube lights and electronic circuits.*

EL293 while welding onboard a ship the current passes through hull, then why people dont get electric shock? METAL HULL HAS RESISTANCE THAN BODY

EL294 types of fuses used in ER ,how to test cartridge type fuse (ceramic )

EL295 how to select a fuse ? BASED ON MAX FAULT CURRENT

EL296 Sketch the types of motor starters. Why timer required in auto transformer and start delta types?




EL297 How do you trace earth faults?

EL298 Trips on an alternator. Motor protection aids?

EL299 There is no neutral on board then how do we get 220V supply?

EL300 Safeties in Alternator



Meo Class IV Orals Ques Bank - Mumbai Mmd

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