Post on 13-Mar-2022
Date of Test : 24.06.2015
Medium of Questions: English
Question Paper Code: 119/2015
Exam Name: Operator - Water Authority
PSC Operator - Water Authority Examination Previous Year Question
Paper
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(A) o"F
(c) o"c
(A) Reducing frictional Power
(C) Reduce comPressron Pressure
5. Catalytic converter is associated with :
(A) automatic transmission system
(C) emission control system
4.
,.
3.
4
A
The rotor type oi:I PumP has :
(A) an inner rotor with a lobe less than the outer rotor
(B) an outer rotor with a lobe less than the inner rotor
(C) an inner rotor with a lobe more than the outer rotor
(D) two rotor with same number of lobes
Theoretically the inlet valve closes at BDC during suction stroke. Practically the inlet valve
remainsopenafewmored'egreesofcrankshaftrotationafterBDC.Thepurposeofthisisto:
100 mark's
The location of Thermostat valve in cooling system is :
(A) at engine inlet from radiator
(C) between radiator and water pump
The viscosity of multigrade oil is determined at :
Tirne : I hour and 15 minutes
(B) at engine outlet to radiator
(D) between water PumP and engine
(B) 100'F
(D) 100'c
(B) Increase valve overlapping period
(D) Increase volumetric efficiency
(B) engine intake system
(D) vehicle braking sYstem
(B) Dragging of clutch
(D) Clutch spinning
6. Which of the following is not a part of primary circuit of ignition system?
(A) Battery (B) CB points
(C) Ignition coils thick wire winding (D) Spark plug
InsufEcient clutch free pedal play causes :
(A) DifficultY in gear shifting
(C) Clutch sliPPing
lP.r.o.l
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E.
9.
13.
t4.
(A) Throw out bearing
(C) Idler gear
10. The type of lubrication systern suitabl'e for racing cars ts :
(A) wet sump lubrication system
(C) dry sump lubrication system
Double heiical gears are known as :
(A) Herring bone gear
(C) Bevel gear
Which of the following device can bring two gearsspeed for smooth gear shifting?
(A) DweII
(C) Included angle
(A) multi axle mechanism
(C) transfejr case
rotating at different speeds to the same
(B) Synchronizer
(D) Inter locking mechanism
(B) splash lubrication system
(D) petrol lubrication system
(B) Camber angle
(D) Overlap period
(B) free wheel mechanism
(D) trans axle mechanism
(B) Spur gear
(D) Spiral gear
ls11. If the lock to lock steering wheel rotation is four turns and the front wheel movbment60 degrees, what is the steering ratio?
(A) 15:1 (B) l8:1
(C) 24:I (D) 2r:1
12. The effect of carbon deposits on the cylinder head inside the combustion chamber is :
(A) increased delay period
(B) increased fuel economy
(C) reduced compression ratio and pre-ignition
(D) increased compression ratio and pre-ignition
Which among the foUowing maintains a constant levei of petrol in float chamber?
(A) Petrol main jet (B) Float and needle valve
(C) Float and throttle valve (D) Choke valve
The time duration, given in degrees of distributor rotation that the CB points remain closedbetween successive opening is :
15. The engine power transfer mechanism that combines a transmission assembly anddifferential assemblv in a sinEle unit is known as :
A4ttgt20t5
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16. Which among the following is not a part of suspension system?
17, The stub axle is connected to the front main axle beam by means of:
(A) trailing link(C) torsion bar
(A) Shackle pin
(C) King pin
18. The distance between therear wheel is known as ;
(A) Wheel track
(C) Wheel base
(B) tie rod
(D) anti roll bar
(B) Wrist pin
(D) Tie rod
centre of front wheel at straight ahead position and the centre of
(B) Thrust line of wheels
(D) Toe-in of the wheels
19.
20, Which of the following is not a possible cause of engine overheating?
"External pressure applied upon a confined fluid isThis law is.:
(A) Pascal's law .
(C) Charl's law
(A) Brake binding
(C) Oil with less viscosity
(A) Float chamber
(C) Mixing chamber
(A) Crown wheel
(C) Pinion wheel
transmitted uniformly in all directions".
(B) Boyles. Iaw
(D) Avagadro's law
@) Fan belt slipping
(D) Over inflated tyre
2I. The narrow space in the cylindrical air horn of the Carburettor through which the air passes is :
22. Major constituent. of CNG (Compressed Natural Gas) is :
(A) Butane
(C) Ethane
23. The component of air brake system which protect reservoir from over loading is :
@) Ventuary' (D) None of the above
(B) Propane
(D) Methane
(B) Unloader valve
(D) Brake chamber
@) Sun gear
@) Planet gear
24.
(A) Brake valve
(C) kvelling valve
The larger gear wheel used in the final drive is called :
A 119/2015tP.r.o.l
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25. The formation of air pockets inside the torque converter due to low pressure is known as :
26. Which among the following factor which does not affect engine compression ratio?
(A) Thickness of cylinder head gasket (B) Carburettor flooding
(C) Baffles on piston (D) Particulate deposits insitle cylincler
27 . The process commonly used for the manufacturing of cylincler liners is : '
(A) Air bieeding
(C) Free wheeling
(A) forging
(C) plaster mould casting
28. The material used for piston ring is :
(A) Cast Iron with Silicon
(C) Stainless steel
(A) valve guide
(C) push rod
Va1ve lapping is the process of grinding :
(A) valve seat and margin
(C) vaive seat and guide
(A) DiaI guage
(C) Straight edge
(A) U-bolt
(C) Cerrtre bolt
119/2015
(B) Cavitation
(D) None of the above
(B) centrifugalcasting
(D) moulding
@) Forged steel
@) Alluminium alloy
(B) Telescopic guage
(D) Trammel
(B) High discharge test
(D) Cadmium test
(B) Shackle
(D) Shackle pin
6
29.. The component which transmit reciprocating motion of valve lifter to rocker arm :
(B) tappet
(D) rocker shaft
(B) valve seat and stem
(D) valve seat and face
31. The warpage of machined faces of cylinder block and cylinder head can be checked with :
30.
32. The test for finding the chemical conclitions of the positive and negative battery plates is :
(A) Open volt test
(C) Specific gravity test
33. The leaf springs are connected to axle beam by means of :
A
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84, The angle between king pin centre line and vertical in the plane of wheel is cailed :
(A) Steering axis inclination (B) King pin inclination
(C) Castor (D) Camber
86. Wear on tyre is more on one side is due to :
(A) Incorrect camber angle (B) Low tyre pressure
(C) High tyre pressure (D) Suilden acceleration
86. Useful power obtained at the engine fly wheel is callecl:
(A) Indicated power (B) Frictional power
(C) Mechanical advantage @) Brake power
8?. The nozzle valve in the injector unit is lifted offfrom it's seat by :
(A) Spring pressure (B) High pressure diese-
(C) Spindle pressur (D) Compression pressure
8E. FIP is driven by:
(A) Crank shaft gear (B) Distributor shaft
(C) Cam shaft screw gear (D) Can shaft gear
gg, Which among the following tool is suitable for inserting piston with rings into the engine
cylinder?
(A) Screw driver (B) Piston ring expander
(C) Piston ring compressor @) All of the above
40. The boiling point of the coolent in cooling syetem is raised by :
(A) Pressure cap (B) PumP casing
(C) Thermostatvalve (D) Radiator
41. Wheat stone bridge works on the principle of:
(A) Ohme Law (B) Kirehoffls Laws
(C) Jouleg Law (D) Faraday's Law
42. In DC machineg for more voltage usually winding is done in :
(A) Lap winding (B) Double Laver winding
(C) Wave winding (D) Concentric winding
A 7 119/2015IP.T.O.I
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45.
44. The capacity of a L,ead acid cell is usually expressed in :
(A) Ampere hour
(C) Watts
43. The curve representing ohm's law is :
(A) A parabola
(C) Linear
(A) Battery
(C) Headlight
(A) 46"
(c). 6e
(A) Iow(C) Hieh
(A) Back emf is high
(C) Fiux is very low
(A) Inside caliper
(C) Spring joint caliper
(A). Overchargedbattery
(C) Fused bulb
(A) 7,eto
(C) High
rtsl2015
(B) Line firnctions
@) A hllperbola
(B) Voltage
(D) Ampere
(B) Distributer
. (D) Sparkplug
(B) ef(D) f
(B) Medium
(D) Very high
(B) Armature voltage is low
@) Armature current is high
The output voltage of ignition coil in an automobile is given to :
46. When power factor is unity, the phase angle between voltage and current?
48. The speed of a DC series rnotor ig dangerously high at no load because :
49. Which caliper ie used for scribing line along curved edgea?
(B) 0utside caliper
@) Jenny caliper
50. This is not the reason for no light from the bulb in an autonobile lighting syetem :
51. If a contactor ig in the open position, the armqture is at its greatest .listance from the coreand the impedance of the coil is :
@) Defective light switch
@) Blown fuse
(B) Inw(D) Half, the normal value
A
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52. For a given VA ratihg cross-section area of core will be less if the following metal is used :
54. An AC or DC electric motor can be used to automatically :
(A) Dynamo sheet
(C) Normal iron sheet
53. Which of the following is not used for etching?
(A) Ferric Chloride
(C) Alkaline Ammonia
(A) Charge the spring
(C) To discharge the spring
In electrical accessories the use of silver is at :
(A) Contact points
(C) Lamp terminal
(A) Milli ammeter
(C) Galvanometer
@) Cupric Chloride
(D) Carbon Tetra Chloride
(B) To reiease the spring
(D) To load the circuit breaker
negative terminal of the battery is earthed- This indicates
(B) AC Generator
@) Inverter
(B) High alloy sheet
(D) Stalloy sheet
55. Air pollution is the least in this t11pe of energy converter :
(A) Bio gas energy converters
(B) Diesel generating sets
(C) Solar cell energy converter
(D) Thermal electric generating statiohs
If a new vehicle is foui.rd that thbthe use of the following :
(A) DC Generator
(C) . Ignition coil
56.
57. Sweep of cefing fan refers to :
(A) Radius of circle formeil by its rotation
(B) Doublb the Iength ofthe blade
(C) The distance from the contr€ of motor to tip ofblade
(D) Double the distance from entre of motor to tip of blade
(B)
(D)
59. The instrument which can be claseified ae an absolute instrument is :
swltcn f,ermrnar
Wire
(B) Micro ammeter .
(D) Tangentgalvanometer
ttgl2015tP.T.O.l
A
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60. The rating of power factor improvgment capacitor is rn :
63.
(A) Micro farads
(C) KVAR
61. A transistor is a operated device.
(A) Current
(C) Both voltage and current
62. DC supply is essential for the operation of:
(A) Mercury vapour lamp
(C) Sofium vapour lamp
(A) Dynamic brake push-button
(C) Delay push-button
Chatter in an AC relay magnet can be eliminated by using :
(A) Laminator
(B) Shading coil
(C) 'U' shaped magnetic core
(D) Matching fixed and movable magnetic limbs
In this wiring, two lamps should be switched 'ON at a time :
(A) Tunnel wiring
(C) Godown wiring
(B) Farads
(D) KVA
G) Voltage
(D) None of the above
(B) Arc lamp
(D) Fluorescent lamp
(B) Hostel wiring
@) Corridor wiring
(B) Regenerativebrakepush-button
(D) Joggingpush-button
64.
65. For alignment of the job in a lathe machine, we may require small movements (snall angularmovements) of the chuck. This could be achieved by using a controller with :
66. Degaussing is the process of:
(A) Removing gases from a material
(B) Removing impurities from a magnetic material.
(C) Demagnetizing a metallic part
' (D) Demagnetizing a magnet
tt9l2015 10 A
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67. HRC fuse is superior protective device as compared to circuit breaker and relay as far as :
(A) Electromagnetic stresses are concerned
(B) Thermal stresses are concerned
(C) Both electromagnetic and thermal stresses are concerned
(D) None of the above
68.
69.
which of the following material has a nelative temperatuie co.efficient of resistance?
(A) Carbon
(C) Copper
By inserting reactance in the rotor circuit :
In three phase power measurement by twofound negative. Then the P.F of the load is :
(A) 0.4 lagging
(C) 0.8 lagging
Epoxy cable joint is used where
(A) H.T cable joints
(C) Temporary joint
(A) Decreasing Rr
(C) Increasing C11
(B) Brass
(D) Aluminium
wattmeter method, reading of one wattmeter
(B) 0.5 lagging
(D) Unity
(B) Heating ofthe cable is not permitted
(D) 'T' joints only
valve eloses and
@) Non return, Foot
(D) Suction, Delivery
(B) Shell type
@) Toroidal type
(B) Increasing Rr,
(D) Increasing both Rr, and C
119/201"5lP.r.o.I
.(A) Reducee starting.torque as well as maximum torque
(B) Increases starting torque but maximum torque remains unchanged
(C) Increases starting torque as well as maximum torque
(D) Increases starting torque but maximum torque reduces
71.
72. At the suction gtroke in a reciprocating pump, thevalve opens.
. , , ,(A) Foot, Non return
(C) Delivery, Suction
73, Voltage stabilizers having auto transformer in servo stabilizer is of
(A) Core type
(C) Distributed core tYPe
?4. The ripple factor of a capacitor filter may be decreased by
.A
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75. On doubling the supply frequency, the eddy current will(A) Become half of their former value
(B) Become four times of their former value
(O Remains unaffected
(D) Become eight times of their former value
76. Ifthree persons take reading in horizontally placed meter at the same instant, whose readingis correct?
(A) The reading taken by the left hand side person
(B) The reading taken by the middle person
(C) The reading taken by the right hand side person
(D) The reading taken by three persons simultaneously
77. If the end of the shaft ofa grinder motor turn blue it is an indication of:
78. In black cotton soil, where water level is'encountered within the pole pit, it is better to use :
(A) Over heating
(C) Freezing
(A) Alternatingcurrent(C) Pulsating current
(A) DC shunt motor
(C) DC series motor
81. On which river bank is Goa located? \
(A) Ganga
(C) Gomati
@) Scoring
(D) Burring
80. When an electric train moves down a hill. the DC series motor then act as :'
(A) Concretefoundation
(C) Embankrnent only
79. For testing insulation resistance the most suited electrical supply is :
(B) Earthen foundation
(D) Mass concrete and embankment
(D Direct current
(D) Oscillatingcurrent
G) DC shunt generator
(D) . DC series generator
(B) Mandovi
(D) Sabarmati
(B) Karnataka
(D) Uttar'Pradesh
82. In which state is "Hawa Mahal (Palace of breeze)" Iocated?
(A) Rajasthan
(C) Andhra Pradesh
A119/2015 t2
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(B)
(D)
(B)
(D)
Ambala
Delhi
Mumbai
Delhi
Equitorial
Mediterranean
Rajasthan
Bihar
M.T. Vasudevan Nair:
Kumaran Aashan
(B)
(D)
(B)
(D)
119/A016lP.r.o.l
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92. Where is Edakkal caves located?
(B) Wayanad
@) Kozhikode
Who is the founder of Sadhujana Paripalana Yogam?
C{) Sree Narayana guru
(C) AYYankali
94. The number of west flowing rivers in Kerala :
(A) 33
(c) 14
95. Smallest Taluk in Kerala :.
(C) Ottapalam
96. Which is the largest fresh water lake in Kerala ?
(A) Astamudi
(C) Wular
97.
99.
100:
(B)
(D)
EMS Nanboothiripaclu
Chattampi Swami
@) 2e
(D) 41
@)
(D)
@)
(D)
Eranad
Varkala
98.
L4
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