PSC Operator - Water Authority Examination Previous Year ...

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



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



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



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



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



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

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(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



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

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A



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


(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

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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


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



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



(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



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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