1 What is the sequence of processes in Otto Cycle?

Adiabatic compression -constant volume heat addition -Adiabatic expansion ­constant volume heat rejection

Adiabatic compression -constant pressure heat addition -Adiabatic expansion­constant volume heat rejection.

Adiabatic compression -constant volume heat addition -Adiabatic expansion ­constant pressure heat rejectIon

Adiabatic compression -constant volume and constant pressure heat addition­Adiabatic expansion -constant volume heat rejection.

2 Two types of engines used in automobiles are

Steam engines and C.I. engines

Steam turbines and S.I. engines

C.I. engines and S.I. engines

Gas turbines and steam turbines

3 The correct order in which the four operations occur in four stroke engine is

suction, compression, power, exhaust

suction, power, compression, exhaust

compression, power, suction, exhaust

exhaust, compression, suction, power

4 Stroke means piston movement from

BDC to TDC

TOC to BDC

Both and

Neither nor

5 The fuel in the float chamber is kept at a constant level by the action of

Float and needle valve

Main jet

Fuel pump

Opening of throttle valve

6 Stalling of S.I. Engine after high speed driving can be caused by

Vapour lock

Incorrect ignition timing

Malfunctioning of carburettor

Malfunctioning of spark plug

7 A knock occurs in II phase of combustion in diesel engine
Because of longer delay period

A -true, R -not true

A-nottrue,R-true

Both are not true

A -true and R is the reason of A

8 When air-fuel mixture ignites before the spark, the phenomenon is c"lIed as

Detonation

Normallgnition

Pre-ignition

Auto-ignition

9 The stoichiometric A/F ratio for combustion in S.I. engine is

4:1

12:1

15

1

10 How many stages are there in c.I. Engine combustion?

Four

Five

Three

Two

11 Antiknock quality of gasoline is measured in

Oxidation number

Vaporization number

Octane number

Cetane number

12 Which part of engine is having connection with pinion of starting motor

Crankshaft

Cam shaft

Damper pulley

Fly wheel

13 Why wet battery is required to supply current to starter motor

To have high voltage

To have low voltage and very high current

To have smooth operation

To reduce cost

14 The automotive electrical system does all the following EXCEPT

produces electric energy

stores electrical energy in alternator

stores electrical energy in chemical form

delivers electrical energy on demand to other electrical accessories

15 The voltage required at spark plug is

6-12V

1000 -2000 V

10,000 -20,000 V

1,00,000 -2,00,000 V

16 Why flash point and fire point of fupl is determined?

For knowing how sofe it is when stored

For knowing combustion characteristic of fuel

For knowing self-ignition temperature of fuel

For knowing vapour lock tendency of fuel

17 The curve A in the given diagram represents


engine fuel consumption

engine brake specific fuel consumption

engine brake torque

engine brake power

18 The curve B in the given diagram represents


engine fuel consumption

engine brake specific fuel consumption

engine broke torque

engine brake power

19 The curve C in the given diagrom represents


engine fuel consumption

engine brake specific fuel consumption

engine broke torque

engine broke power

20 Idling co-emission for all two and three wheeled petrol vehicles should not exceed ............. by volume

3.0°

4.5°

5.0°

6.0°

21 Maximum torque multiplication in a torque converter is

2.8

8.2

1.5

5.1

22 Clutch slips due to
Oil on friction plate
Worn-out clutch lining
Weak pressure springs

alone is correct

and are correct

and are correct

All and are correct

23 The purpose of the sliding joint in a propeller shaft is to

adjust the distance between gear box and differential

avoid whirling motion of propeller shaft

transfer power from gear box and differential

allow easy disassembly of the propeller shaft for repairs

24 Rear axle of HCVs is equipped with the following arrangement:

semi-floating

three quarter-floating

fully-floating

a quarter-floating

25 Limited slip differential is essential in

Cars

Trucks

MUV

Tractors

26 The camber angle is normally kept upto

06°

04°

05°

02°

27 The following arc the reasons for hard steering
excessive castor may be there
incorrect wheel alignment
tyre pressure may be too high
steering-gear may be adjusted too tightly

All arc correct

are correct

are correct

are correct

28 In a simple planetary gear set, the output member used in order to increase turque is always

Sun gear

Ring gear

Planet carrier

Planet

29 The brake system which is the most efficient among the given, is

Mechanical brake system

Hydraulic brake system

Vacuum servo brake system

Air brake system

30 Select the better arrangement of shoes for manually operated hydraulic brake system

one leading, one trailing shoe

both leading shoes

both trailing shoes

Any of the arrangement

31 The purpose of tyre rotation on automobiles is to

avoid ply separation

get better ride

equalise wear

decrease heat dissipation in tyre

32 Which of the following pair(s) is/are correctly matched?
Spark plug 1 mm
C.B. point 0.3 mm
condenser l2 V -0.2 uF
L.T 12 V









33 Which of the following pair(s) is NOT properly matched?

Head light 12V, 60W/60W

Blinkers 12V, 18W /18W

Brake light 12V, 3W

Parking light 12V, 6W

34 The distance between the front axle and the rear axle measured along the length of the vehicle is called

Wheel track

Whee1 base

Front overhang

Vehicle length

35 Which resistance depends upon wind velocity, speed, shape and size of the body of the vehicle

Frictional resistance

Rolling resistance

Air resistance

Tractive resistance

36 While cornering, centrifugal force produces a movement of vehicle about a longitudinal axis, which is called as

Bouncing

Pitching

Rolling

Gyroscopic effect

37 Maruti 1000 passenger car is having following layout:

Front Engine Rear wheel Drine

Rear Engine Rear Wheel Drive

Front Engine Front Wheel Drive

Rear Engine Front Wheel Drive

38 Which of the following car body shapes has the largest internal dimensions

Coupe

Saloon

Convertible

Estate

39 In conventional layout, clutch is mounted between

Engine and Gear box

Gear box and propeller shaft

Propeller shaft and final drive

Final drive and differential

40 Worn-out piston rings cause
excessive oil consumption
loss of power
loss of torg LlC
loss of compression

only are correct

only are correct

All are correct

only is correct

41 Which piston ring wears faster than the other ring

Top compression ring

Lower compression ring

Oil control ring

Oil scraper ring

42 Pitch and tone of electric horn is adjusted by

air gap

contact gap

air gap and contact gap respectively

contact gap and air gap respectively

43 Vapour lock occurs in the

Fuel line or pump

Fuel pump or tank

Carburettor and tank

Tank or gauge pipe

44 To remove cylinder liners from engine block, use

Wooden hammer and chisel

Pullers

Pressure screw, pusher and twister

Mallet and vice grip

45 A bent wheel of the car should be

welded

heated

straightened

discarded

46 The process of removing all of the old brake fluid from the hydraulic system is called

bleeding

cleaning

changing

flushing

47 A warped pressure plate should be

retempered

straightened

replaced

refaced

48 Painting cracks occur due to

thin layer of paint

thick layer of paint

improper paint viscosity

wrong setting of air pressure during painting

49 Front wheel alignment is adjusted by altering

angle of track arm

length of track arm

distance between king pins

position of the drag link

50 Firing order of six cylinder inline engine fitted with right hand crankshaft is









51 A motor vehicle designed for physically handicapped person is called

contract carriage

stage carriage

invalid carriage

articulate carriage

52 LCV have gross vehicle weight range as

1.5 -6.0 tonnes

5.0 -8.5 tonnes

8.0 -10.0 tonnes

10.0 -16.0 tonnes

53 Secretary of Regional Transport Authoritv is

R.T.o.

Transport Minister

Transport Commissioner

I.M.V.

54 CMVR revised in the is being enforced today.

1988

1956

1979

1989

55 CRRI is situated at

Pune

Mumbai

Ahmednagar

Delhi

56 Who is the administrative in-charge at State Transport Depot?

Depot Controller

Asst. Traffic Supdt.

Depot Manager

Asst. Workshop Supdt.

57 The proto-type of every vehicle to be mechanically fit to drive in public place is certified bv:

CIRT

ARAI

VRDI

CRRI

58 Third party insurance safeguards the interest of

third party only

owner only

owner and third party

owner, third party and vehicle

59 Temporary registration of a motor cycle remains valid for a period not exceeding

15 days

one month

six months

one year

60 Minimum educational qualifications for driving goods carriage carrying dangerous goods is

Fourth Std.

Fifth Std

Ninth Std.

Tenth Std.

61 If material expands freely due to heating,it will develop

Thermal stresses

Tensile stresses

Compressive stresses

No stress

62 The total strain energy stored in a body is termed as

Resilience

Proof resilience

Modulus of resilience

Toughness

63 According to Euler's theory, the strength of a column against buckling is dependent upon

Modulus of elasticity

Bulk modulus

Cross-section area of column

None of above

64 In a beam at a place where the shear force is maximum, the bending moment will be

Maximum

Minimum

Zero

Neither maximum nor minimum

65 A beam is said to be of uniform strength if

Bending moment is same throughout the beam

Shear stress is same throughout the beam

Deflection is same throughout the beam

Bending stress is same at every section along its longitudinal axis.

66 Maximum shear stress in Mohr's circle is

Equal to radius of Mohr's circle

Greater than radius of Mohr's circle

Less than radius of Mohr's circle

None of above

67 The constant term for Rankine's formula is called Rankine's constant and is given by:
where fc Yield stress in component, E Modulus of elasticity


68 What is the angle between plane of maximum shear with principal plane?

90°

45°

60°

0°

69 If a shaft is designed to take combined bending moment and torsion then the equivalent torque will be



70 Hoop stress in a thin cylinder is given by the formula,
where D Diameter of cylinder
P Load applied
t Thickness



71 Working of metals at temperature below their recrystallisation temperature is defined as

Hot working

Cold working

Hot spinning

Cold spinning

72 Hollow cylindrical bodies like water pipes, gun barrels etc., can be manufactured by

Investment casting

Die casting

Centrifugal casting

Shell moulding

73 Split nut in lead screw mechanism of lathe

Vee

Square

Buttress

Acme

74 Work holding device used for hollow cylindrical bar on lathe is

Chuck

Arbour

Mandrel

Magnetic chuck

75 The main difference between a shaper and a planer is

A shaper is smaller in size

A shaper is hydraulically operated while a planer is mechanically operated

Number of cutting tools is more in planer

Cutting tool is stationary in planer while cutting tool moves in shapero

76 Thermoplastic material such as cellulose nitrate, polystyrene are cast by

Continuous casting

Centrifugal casting

Injection moulding

Die casting

77 Milling of curvel irregular surfaces is possible with

shaper

vertical column and knee milling machine

plane milling

None of the above

78 Shock resisting steel is mainly used

Leaf and coil spring

Hammers ilnd chisels

Cranks and piston rods

Loco wheels and rails

79 What are the changes of metal structure dimension in hot rolling process as the metal passes through the rolls?

Reduced in thickness and increased in length

Reduced in thickness and in length

Increased in thickness and reduced in length

Increased in thickness and in length

80 Which process is used to produce tools, gear blanks, crankshafts, connecting rods, gears etc.

Forging

Smithing

Swaging

Fullering

81 Which is the process of removing thick layers of metal by means of Cold Chisel?

Cutting

Sawing

Chipping

None of the above

82 Drill size before tapping is derived from the where'D' is diameter of tap drill size, is diameter of tap to be used and is depth of cut

D T 2d

D T 2d

D T 3d

D T 3d

83 What are conditions which tend to promote the formation of built-up edge of cutting tool?

Low cutting speed, low rake angle and high speed.

High cutting speed, low rake angle and high speed.

High cutting speed, high rake angle and high feed.

Low cutting speed, high rake angle and low feed.

84 Which cutting tool is used for enlarging or finishing a hole previously drilled, bored or cored to give a good finish and an accurate dimension?

Parallel shank twist drill

Taper shank core drill

Reamer

Multi-tooth twist cutter

85 Precision grinders are those that finish parts to a very accurate dimensions. One of the grinders is

Swing frame grinder

Abrasive belt grinder

Surface grinder

Portable and flexible shaft grinder

86 Which is a process that is used to produce geometrically true surface, correct minor surface, imperfections, improve dimensional accuracy or provide a very close fit between two contact surfaces?

Honing

Polishing

Lapping

Buffing

87 The purpose of annealing is to

refine structure

reduce softness

improve machinability

None of the above

88 Choose the wrong statement from the following:

The shaper in comparison to planer is easier to operate and about three times quicker in action.

In shaper, the metal is removed during forward stroke.

The shaper is best suited for cutting keyways and splines on shafts.

In case of planer, reciprocating motion is given to the cutting tool.

89 The orthogonal cutting takes place when cutting face of tool is at one of the angles mentioned below to the line of action of tool.

45°

60°

90°

120°

90 Which one of the following is most suitable to hold the job for drilling hole on the curved surface?

Angle plate

Table with T-slot

Vee-block

None of these

91 A body of weight 1000 N is moved on a horizontal plane haveing coefficient of friction 1/sq.rt of(3). The minimum force applied parallel to the horizontal plane to move the body is

1000 sq.rt

1000

1000/sq.rt

500

92 The efficiency of screw jack

depends on load on jack

depends on the pitch of the screw threads of the jack

depends on both and

does not depend combinedly on and

93 A dynamometer fitled on internal combustion engine measures

the brake horse power

the brake torque

the indicated horse

the indicated torque

94 The size of the cam depends upon

Base circle

Prime circle

Pitch circle

Pitch curve

95 The magnitude of 'Coriolis' component of acceleration of sliding block relative to link is
where V velocity of sliding block on link, w angular velocity of link

(1) Vw

Vw/2

2Vw

Vw2

96 In an engine mechanism, at what position of Crank angle, the angular velocity of connecting rod is zero?

180°

90°

45°

0°

97 Contact ratio of spur gear pair is the ratio of
Angle of action to pitch angle
Length of line of action to base of pitch of teeth
Length of line of action to circular pitch of teeth
Arc of contact to circular pitch of teeth.

Which of these statements are correct

and are correct

and are correct

and are correct

All are correct

98 The angle between the common tangent to the base circle of gear pair and common tangent to their pitch circle is called

Cone angle

Helix angle

Spiral angle

Pressure angle

99 No force is required for the downward motion of the load on screw jack if (alpha pitch angle and phi Friction angle)

alpha phi

alpha phi

alpha 0

None of the above

100 In case of Pivot bearing, the wear is

Maximum at the centre of the contact area

Zero at the centre of the contact area

Uniform throughout the contact area

Zero at the maximum radius of the contact area

101 Specific speed of the hydraulic turbine is given by following equation:



102 Falling drops of rain acquire spherical shape on account of

Viscosity

Surface Tension

Adhesion and cohesion

Compressibility

103 The standard atmospheric pressure of air is 760 mm of mercury
10.33 metres of water column
1.0332 atm
101.325 KN/m2

alone is correct

are correct

are correct

All are correct

104 The centre of gravity of the volume of the liquid dispersed by an immersed body is called as

Centre of pressure

Meta-centre

Centre of buoyancy

Centre of gravity

105 Which of the following represents steady uniform flow

Flow through a diverging duct at increasing rate

Flow through a diverging duct at any decreasing rate

Flow through a long pipe at constant rate

Flow through a long pipe at decreasing rate

106 Cavitation in hydraulic turbine results in

Noise and vibration

Reduction of discharge

Drop in output and efficiency

All of the above

107 For pumping viscous oil, the pump used is

Centrifugal pump

Reciprocating pump

Turbine pump

Screw pump

108 A pump which does not com.e in category of positive displacement pump is

Reciprocating pump

Gear pump

Vane pump

Centrifugal pump

109 The water turbine selected for head varying from 50 m to 150 m is

Bulb Turbine

Propeller Turbine

Pelton Wheel

Francis Turbine

110 Airy vessels are provided in reciprocating pump to

store air discharged by pump

obtain continuous discharge from the pump

increase the pressure of water

safeguard the pump

111 Petroleum can be classified as

A renewable form of energy source

A non-renewable form of energy source

A non-conventional form of energy source

None of the above

112 The disadvantage of using solar energy for power production is

Energy available in daytime only

Initial cost is high

Requirement of large area for harnessing solar energy

All of the above

113 Solar cells are made of

Silica

Antimony

Carbon

Steel

114 Which of the following devices can be used to harness solar energy?

Photo-voltaic cell

Wind mill

Gas turbine

Steam turbine

115 When can we have windmill for power?

When high velocity wind (not cyclonic) for long duration of day is available

Cyclonic wind is available

Low velocity wind is constantly available

Movement of air occurs

116 Which one of the following is correct statement?

Latent heat is the heat that does not follow first law of thermodynamics.

Latent heat is the heat that is required to change the substance from solid to gaseous state

Latent heat is the heat that can be detected

Latent heat is the heat required to change a state of substance from liquid to gaseous state.

117 In steam power plant, thermodynamic cycle used is

Brayton

Rankine

Carnot

Joule

118 Match List-I correctly with List-II and select your answer using the code given below:
List-I List-II
Steam engine I. Spark plug
Steam turbine II. Eccentric
Otto cycle engine III. Manhole
Boiler IV. Fixed and moving blades

A B C D

II IV I III

III II I IV

IV III II I

I III IV II

119 The fuel mostly used in steam boilers is

Peat

Coking bituminous coal

Non-coking bituminous coal

Brown coal

120 In a four stroke engine, we get one power stroke in

270 of crank rotation

360 of crank rotation

540 of crank rotation

720 of crank rotation

121 Morse test is carried out to determine the IP of a

Single cylinder petrol engine

Single cylinder diesel engine

Multi cylinder engine

Double acting steam engine

122 The device for smoothing out the power impulses from the engine is called

Fly wheel

Clutch

Torque convertor

Differential

123 Which one of the statement is correct
Petrol engine is a reciprocating engine
Petrol engine is high speed engine
Petrol engine uses petrol as fuel
Petrol engine is internal combustion engine

All four are correct

only is correct

only is correct

All are wrong

124 To develop high voltage for spark plug of petrol engine

Distributor is installed

Carburettor is instailed

Battery is installed

Ignition coil is installed

125 Standard firing order for four cylinder, four stroke petrol engine is







20

126 In compression ignition four stroke cycle engine, Cam shaft runs at

half the speed of crankshaft

same the speed of crankshaft

twice the speed of crankshaft

any speed irrespective of crankshaft speed.

127 The actual volume of fresh charge taken into four stroke-petrol engine is

Less than stroke volume

Equal to stroke volume

Equal to stroke volume clearance volume

Does not depend upon stroke volume

128 A two stroke IC engine is identified by

the size of the engine

size of the flywheel

type of cooling system

absence of valves

129 Within a carburettor, the velocity of air is maximum at

outlet

inlet

throat of venturi

central point of total length

130 The diesel engine is identified by the presence of

air cleaner

radiator

fuel injector

starter

131 In a heat engine which of the following energy conservation occurs?

Work is converted into heat.

Heat energy is converted into electrical energy.

Heat energy is converted into work.

Electrical energy is converted into heat energy.

132 What is thermal efficiency of a heat engine?

It is the ratio of brake pmver to indicated power

It is the ratio of work output to heat supplied

It is the ratio of heat rejected to heat supplied

It is the ratio of work output to heat rejected

133 Compression ratio of a petrol engine is

Higher than that of diesel engine

Lower than that of diesel engine

Equal to that of diesel engine

None of the above

134 In a condensing steam engine,

the pressure in condenser is above atmospheric pressure

the pressure is below atmospheric pressure

the pressure is equal to atmospheric pressure

the complete vacuum exists in condenser

135 With increase in compression ratio, the thermal efficiency of the Otto cycle

Decreases

Does not change

Cannot be predicted unless 'y'(adiabatic index)is known

Increases

136 As the compression ratio increases, the volumetric efficiency of compressor

decreases

increases

remains same

becomes unpredictable

137 Rotary compressor can supply

large volumes of air at low pressure

small volumes of air at high pressure

large volumes of air at high pressure

small volumes of air at low pressure

138 Which one of the following is not a safety device on Compressor

Relief valve

Over-pressure shut down

Strainer

Over-speed shut down

139 The axial flow compressor and centrifugal compressor represent

Positive and non-positive type of rotary compressor respectively

Positive type compressors

Non-positive and positive type of rotary compressor respectively

Non-positive type of compressors

140 In multistage compression, intercooling is done to

Reduce the volume of air

Minimise the work of compression

Cool the air

All of the above

141 Refrigeration is based on

First law of thermodynamics

Second law of thermodynamics

Dalton's law

Boyle's law

142 In domestic refrigerator, following compressor is used:

Rotary

Reciprocating

Centrifugal

None of the above

143 Freezing point of Brine is

Below 0 centigrade

Above 0 centigrade

Equal to 0 centigrade

None of the above

144 Function of thermostat in a domestic refrigerator is to maintain

Temperature constant

Pressure constant

Volume constant

None of the above

145 Air conditioning is control of

Temperature of air

Relative humidity of air

Temperature, relative humidity and motion of air

None of the above

146 In comfort air conditioning, the required comfort conditions are

15°C DBT and 75% R.H.

20°C DBT and 80 R.H.

15°C DBT and 35% R.H.

24°C DBT and 60% R.H.

147 Human body dissipates heat in the form of

Sensible heat only

Latent heat only

Both sensitive and latent heat

None of the above

148 The method commonly used for dehumidifying air is ....

Heating

Cooling

Heating and Cooling

To spray steam in the air

149 Refrigerant used in vapour absorption refrigerator is

Freon-12

Water

Ammonia

F-l1

150 If window air conditioner is kept at the centre of closed room, then temperature of the room will

increase

decrease

not change

unpredictable