Mining Engineering

Q1. Which cut is used for solid blasting in Indian coal Minesa) Fan cut b) burn cut c) wedge cut d) drag cut

Q2. Permitted explosives are safe to use becausea) They have less strength b) they have low velocity of detonation c) they do not

produce much noise during blasting d) special chemical are used to extinguish the spark produced during blasting.

Q3. Burden is the distance between a) Two blast holes in same row b) distance between two rows c) distance between

first row of blast holes and bench d) none of the aboveQ4. Which of the following explosive have maximum strength

a) ANFO b) TNT c) RDX d) NitroglycerineQ5. To measure the performance of blasting which factor is calculated

a) Tonnage factor b) space factor c) stripping ratio d) Powder factorQ6. What is the formula for blast ability? a) B = c / t b ) B = t / c c) B = c + t d ) B = c X t

Where B = Blast ability c = compressive strength t = tensile strength of a rock

Q7 As per provision of regulation 170 (1a)(b) of CMR 1957 danger zone is an area falling a radius of --------

a) 100 m b) 150 m c) 200m d) 300m

Q8 While blasting in hot strata the temperature of hole should not exceed a) 50 c b) 60 c c) 70 c d) 80 c

Q9 Fly rocks during opencast blasting is controlled by a) Pop shooting b) Plaster shooting c) muffled blasting d) overcharging

Q10 While dealing with Misfire shot the relieving hole is drilled at a distance not less than a) 10 m b) 20m c) 30 m d) 40 m

Q11 As per CMR the recapping of rope is done once at least in every a) 3 month b) 4 months c) 6 months d) 1 year.

Q12 what is the maximum angle of fleet is permissible in winding as per CMR

a) 1 b) 1.5 c) 2 d) 2.5

Q13 a coal seam is said to be of degree III if rate of emission of gas in m3 /te of coal raised is

a) is equal to 10 b) less than 10 c) more than 10 d) in between 1 to 10

Q 14 reportable injury means any injury other than serious bodily injury, which involves the enforced absence of injured person from work for a period of

a) 24 hours or more b) 36 hours or more c) 48 hours or more d) 72 hours or more

Q15 When the air and mineral flow is in same direction the ventilation is known as

a) Homotropal ventilation b) antitropal ventilation c) boundary ventilation d0 natural ventilation

Q16 Roof falls are more common if the face is at

a) Right angles to the main cleatb) Parallel to the main cleatc) 60 degrees to the main cleatd) None of the above

Q17 A seam is worked at a depth of 70 mtrs . from surface and the width of the galleries is 3.2 mtr the dimension of the pillar should not exceed

a) 15.0 mtrsb) 16.5 mtrsc) 19.5 mtrsd) 13.5 mtrs

Q18 In board and pillar panel worked in conjunction with hydraulic stowing extraction line preferred is

a) Step diagonalb) Diagonalc) Steep diagonal d) Straight

Q19 emulsion explosive is mixture of

a) Ammonium nitrate, TNT, NGb) Ammonium nitrate, TNT, guar gumc) Ammonium nitrate, NG , water

d) Ammonium nitrate, water, hollow microballons

Q20 Coalfication has taken place in order of

a) Peat. Lignite, bituminous, anthraciteb) Lignite, peat, bituminous, anthracitec) Peat, lignite, anthracite, bituminousd) Bituminous, peat, anthracite, lignite

Q21 coal seams are normally found in

a) Sedimentary rocksb) Igneous rocksc) Metamorphic rocksd) Any type of rocks

Q22 In India a coal seam is defined as a thick coal seam if its thickness is

a) 3m or moreb) 3.5 m or morec) More than 4.8md) 2.5m or more

Q23 black damp is a mixture of

a) CO2 + N2b) CH4 + COc) CO + CO2d) O2 + H2S

Q24 When working approaches waterlogged areas apparatus used as precautionary measure is

a) Diamond drillingb) Burn side boringc) Jackhammer drillingd) Chilled shot drilling

Q25 keps are used in

a) Koepe windingb) Direct haulagec) Endless haulaged) Drum winding

Q26 Chasnala mine disaster is due to

a) Fireb) Inundationc) Explosiond) Noxious gases

Q27 permissible dust concentration in Indian mines isa) 3mg/m2of airb) 4mg/m2of airc) 3.5mg/m3 of aird) 5mg/m2 of air

Q28 Factor of safety for winding rope is

a) 10b) 15c) 5d) 7.5

Q29 Life of winding rope is

a) 4.5 yearsb) 14 monthsc) 2 yearsd) 3.5years

Q30 Runaway switch is used in

a) Rope haulageb) Windingc) Belt conveyord) Aerial ropeway

Q31 The purpose of wire gauge in flame safety lamp is

a) To prevent the passage of flame from inside to the outside of the lampb) To prevent the passage of CH4 from outside to the inside of the lampc) To disperse the combustion gases uniformlyd) For proper circulation of air current

Q32 the hopkalite used in CO detector is a mixture of MnO2 and

a) Lead oxideb) Copper oxidec) NaCl

d) Silica gel

Q33 Self-rescuer can be used upto ________ % of CO

a) 2b) 3c) 1.5d) 2.5

Q34 According to CMR 1957 CH4 % in return airway should not exceed

a) 1%b) 1.75%c) 0.75%d) 1.25%

Q35 the wet bulb temperature in development faces should not exceed

a) 33 Cb) 32.5 Cc) 33.5 Cd) 30 C

Q36 In contiguous seams means the parting between two seams is within

a) 10mb) 9mc) 15md) 20m

Q37 which of the following instruments is used to measure the cooling power of the air

a) Anemometerb) Velometerc) Manometerd) Katathermometer

Q38 Joining of two ropes is called as

a) Splicingb) Cappingc) Interlockingd) Gassing

Q39 Clifton pulley is used in

a) Direct rope haulageb) Main and tail rope haulagec) Gravity haulage d) Endless rope haulage

Q40 when shot hole is blasted at a quarry face, fracture of rock takes place by

a) Compression shock wave b) Reflected shock wave

c) Both by compression and tensilee) By gas pressure

Q41 The minimum accuracy of colliery triangulation survey is aimed at

a) 1 in 5000b) 1in 7000c) 1in 10000d) 1 in 15000

Q42 fast and accurate extension of centerlines in long tunnels can be done by

a) Miners dialb) Theodolitec) Laser beam rangerd) Strings with chalk marks

Q43 Mechanized opencast mining in India is economically feasible at present if the overburden to coal ratio is approximately upto

a) 1in2b) 1in 4c) 1in 8d) 1in10

Q44 for overburden removal with shovel dumper combination the optimum size of the dumper depends on

a) The distance of the haulb) Size of the shovelc) Size of the shovel and the distance of hauld) Tonnage to be handled

Q45 In an underground coal mine the place where explosive is stored in underground is called as

a) Reserve station b) Shelterc) Magazined) None of the above

Q46 for heavy duty crushing on hard material the type of jaw crusher normally selected is

a) Blake type double toggle b) Dodge typec) Single toggle typed) None of the above

Q47 To separate two finely divided solids from one another the process to be selected is

a) Floatingb) Washingc) Jiggingd) None of the above

Q48 A Zn deposit is formed by a geological process is called

a) Hydrothermalb) magmatic separationc) supergened) None of the above

Q49 cut and fill stoping can be operated

a) Underhand onlyb) Overhand onlyc) Both underhand and overhand d) None of the above

Q50 If the RQD of the ore and wall rock are low the method of stoping selected will be

a) Shrinkageb) Sublevel cavingc) Block cavingd) Cut and fill

Q51 the stoping method in which maximum cost is incurred is

a) Square set stopingb) Cut and fill stopingc) Shrinkage stoping

d) Sublevel stoping

Q52 In the panel caving system of block caving the contact between the ore and capping is kept

a) Horizontalb) Inclinedc) Verticald) None of the above

Q53 The ventilation plan of a mine should be on a reference scale ofa) 1000: 1b) 1200: 1c) 2000:1d) 1500:1

Q54 In any working below ground there should be provided at least two shafts or incline which should be away from each other by a minimum distance

a) 12.5 mtrsb) 13.5 mtrsc) 14.5 mtrsd) 15.4 mtrs

Q55 Poisson ratio is a relationship between

a) Longitudinal stress and lateral stressb) Longitudinal strain and lateral stressc) Longitudinal stress and internal straind) Longitudinal strain and lateral strain

Q56 RQD is a quantitative index based on core recovery procedure which is determined by incorporation of only those pieces of core that are

a) Less than or equal to 100mmb) Greater than or equal to 100mmc) Less than or equal to 125mmd) Greater than or equal to 125mm

Q57 In a contoured Map if there are higher values in side the loop it indicates

a) Ridgeb) Valleyc) Plane landd) None of the above

Q58 The intersection of a vertical line through the observer’s station with the upper portion of the celestrial sphere is called

a) Nadirb) Ceriestrial horizonc) Zenithd) None of the above

Q59 the effect of curvature in leveling is an error, which is

a) Subtractiveb) Additivec) Multiplicatived) None of the above

Q60 The minimum accuracy of colliery triangulation survey is aimed at

a) 1in 5000b) 1in 7000c) 1in 10000d) 1in 15000

Q61 The earliest indication of the spontaneous heating of coal can be given by

a) Sweating of stratab) Make of CO2c) Temperature rised) None of the above

Q62 In an underground coal mine ventilated by 100 HP fan (Air HP) it is required to double the quantity of air for the purpose of air HP required will be

a) 200 H.Pb) 400 H.Pc) 800 H.P.d) 600 H.P.

Q63 Ore for metal lead is

a) Galenab) Sphaleritec) Graphited) Pyrite

Q64 DGMS comes under

a) Mines Ministry

b) Labor Ministryc) Ministry of Coald) Law Ministry

Q65 lily controller is used for the protection in winder

a) Over windb) Over speed c) Over currentd) Over load

Q66 balance rope is used on Koepe friction winder

a) To increase the weight of load b) To connect cage and counter weightc) To balance winding roped) To balance cage winding rope and to reduce power consumption

Q67Factor of safety (FOS) in connection with winding

a) Assumes a constant valueb) Varies with respect to timec) Applicable to dynamic loadingd) Applicable to static loading

Q68 LHD is a

a) Loading machineb) Hauling machinec) Dumping machined) Loading, hauling and dumping machine

Q69 the shape of the casting in a centrifugal pump is

a) involuteb) Circularc) Cylindricald) Conical

Q70 Magnetic separation is

a) A dry method b) An wet methodc) Combination of two d) None of the above

Q71 Notice to regional inspector of mines about occurrence of serious accident is given in form

a) IV Ab) IV Bc) IV Cd) IV D

Q72 Blasting Gallery method is not suitable for working seam thickness

a) Less than 7 mb) More than 7mc) Up to 11md) More than 11m

Q73 The size and speed of rotation being the same the head developed is max in case ofa) an Arial flow fanb) a backward bladed centrifugal fanc) a radial bladed centrifugal fand) a forward bladed centrifugal fan

Q74 In water gas explosion the two highly explosive gases that are involved are

a) H2 and COb) N2 and COc) H2 and CO2d) O2 and CO

Q75 In an underground working area CH4 and CO2 are normally expected to be found respectively

a) Near the floor and along the the roadwayb) Near the floor and near the roofc) Near the roof and near the floord) Along the roadway and near the floor

Q76 The most important parameter of a dust that governs its physiological effect is

a) Concentration of dust in airb) Shape of dustc) Time of exposured) Size of dust

Q77 In a mine a big roof fall has taken place in the mine intake place in main intake airway. The fan drift water gauge

a) Will remain unaffected

b) Will register an increasec) Will decreased) Will increase temporarily only when fall takes place

Q78 Stone dust barriers are installed in underground

a) To prevent the imitation of coal dust explosionb) To prevent imitation of firedamp explosionc) To act as the storage of stone dustd) None of the above

Q79 60 dB + 60dB

a) 120 dBb) 3600 dBc) 63 dBd) 36 dB

Q80 In ventilation network analysis, kirchhoff’s first law is used which states

a) The pressure loss in a closed mesh is zerob) The algebraic sum of quantitities flowing at a junction is zeroc) The resistance of an airway varies with the square of the air velocityd) None of the above

Q81 Atkinson’s equation P = RQ2 is applicable for

a) Laminar flow onlyb) Fully turbulent flow onlyc) Leakage paths onlyd) All of the above

Q82 NVP in a mine is more in

a) Summer as the air going in is hotb) Winter as the air going in is coldc) Rainy season as the air going in is moistd) Do not vary with season

Q83 Reynolds number varies

a) Inversely with flow velocityb) Directly with flow velocityc) Directly with square of flow velocityd) Does not vary with velocity flow

Q 84 Resistance of a mine airway does not depend upon a) Its lengthb) Its cross sectionc) Quantity of air flowing in itd) Its coefficient of friction

Q85 An electric cap lamp as used in mine has a fuse of capacity

a) 1 ampb) 2 ampc) 3 ampd) 4 amp

Q86 A 10% increase in cross sectional area of a roadway will reduce the resistance approximately by

a) 10%b) 20%c) 30%d) 40%

Q87 The recommended instrument for the air borne respirable dust sampling in the Indian mines is

a) CLP-10b) Konimeterc) RAM-Id) NCB/MRE-113A

Q88 The oxygen concentration in underground mine should not be less than

a) 20.93%b) 20%c) 19%d) 18%

Q89 the thickness of ventilation stopping should not be less than

a) 27 cmsb) 38 cmsc) 35 cmsd) 47 cms

Q90 A cap lamp must be able to produce an illumination of

a) 0.25 lumansb) 0.25 luxc) 0.25 candlas/m2d) 0.25 foot candlas

Q91 Gravimetric dust samplers works on the principals of

a) Filtrationb) Thermal precipitationc) Opticald) Impaction

Q92 carbon monoxide detector tubes uses

a) PETNb) Protosorbc) Hopcolited) Potassium palladium sulphate

Q93 Installation of booster fan in one district

a) Reduces the flow of air in other districtb) Increases the flow of air in other districtc) Reduces the resistance of other districtd) None of the above

Q94 Pitot tube is generally used for

a) Measurement of air velocity in mine airb) Measurement of air pressurec) Measurement of air velocity in ductsd) None of the above

Q95 Gas chromatography utilizes the principal of

a) Sonic velocityb) Refractive indexc) Solid gas absorptiond) Optical

Q96 Explosibility of coal dust generally does not depends on

a) Fineness of dustb) Composition of dustc) Presence of methane in aird) Colour of dust

Q97 For measuring relative humidity we usea) Anemometerb) Velometerc) Psychrometerd) Manometer

Q98 Geothermal gradient in Indian coal fields is about

a) 1 0 C / 20mb) 1 0 C / 92mc) 1 0 C / 38md) 1 0 C / 72m

Q99 A drum Shearer is mounted on

a) Its own skidb) Separate railc) A.F.C.d) Support frame

Q100 Dust generation may be reduced by drilling

a) low RPMb) Sharp bitc) High RPMd) Low Thrust

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