Q.1

The frequency of flashing of light per minute in a direction (side turn) indicator is about

  • 9
  • 90
  • 900
  • 9000
Q.2

The purpose of adding pigment to the paint is that it

  • optimises the viscosity of paint
  • makes paint film hard
  • gives colour and filling up effect to the paint
  • none of the above
Q.3

When the battery is half (50%) charged, the specific gravity of acid in a battery is usually

  • 0.74
  • 1.00
  • 1.12
  • 1.19
Q.4

In bias ply tyres

  • all plies run parallel to one another
  • belts of steel mesh are used in the tyres
  • one ply layer runs diagonally one way and another layer runs diagonally the other way
  • all of the above
Q.5

The two rows of cylinders in a 'V' type engine are generally arranged at

  • 45°
  • 60°
  • 90°
  • 130°
Q.6

The characteristic that is enhanced by the use of cylinder sleeves is

  • cooling efficiency
  • resistance to wear
  • lubrication performance
  • none of these
Q.7

The major purpose of an electronically-controlled automatic transmission is that this type of transmission

  • eliminates gear clutches
  • eliminates the gear shift lever
  • reduces the number of automatic-transmission components
  • reduces shift shock and achieves more efficient transmission of engine torque
Q.8

The effect of vapour locking on the brake performance is that the

  • brakes function more effectively
  • brakes fail completely
  • brake operation is delayed after depression of the brake pedal
  • vapour locking has no effect on brake performance
Q.9

The main function of an exhaust muffler is the

  • optimisation of exhaust efficiency
  • reduction of exhaust noise
  • reduction of nitrogen oxide in the exhaust gases
  • reduction of the exhaust gas volume
Q.10

In a Diesel engine, the function of a fuel injector is to

  • mix the fuel and air
  • ignite the air-fuel mixture
  • provide flame front for ignition
  • spray atomized fuel in the cylinder
Q.11

Thinner is added to the paint in order to

  • make pigments and resin mix easily
  • make paint film hard
  • optimise its viscosity
  • none of these
Q.12

A laminated glass upon cracking

  • bursts into sharp edged fragments
  • bursts into granular pieces
  • sandwiched layer traps the fragments
  • breaks into the form of crystals
Q.13

The specific gravity of Diesel is about

  • 0.65
  • 0.75
  • 0.85
  • 0.95
Q.14

The boiling point of Diesel fuel is in the range of

  • 70°C to 100°C
  • 100°C to 120°C
  • 120°C to 180°C
  • 180°C to 360 °C
Q.15

During braking, the brake shoe is moved outward to force the lining against the

  • wheel piston or cylinder
  • anchor pin
  • brake drum
  • wheel rim or axle
Q.16

The crescent-shaped cavity on the piston head top surface is called as

  • piston oil hole
  • snap ring
  • valve recess
  • valve clearance
Q.17

The octane rating of petrol commerically available is

  • 85-95
  • 95-100
  • 100-110
  • 110-125
Q.18

The differential ensures that each wheel is driven at a speed which corresponds to the distance it must travel around a corner, and it consequently prevents against excessive tyre wear.

  • Agree
  • Disagree
Q.19

The connecting rods are generally made of __________ shaped cross-section.

  • I
  • C
  • L
  • H
Q.20

The connecting rod is attached to the piston by the

  • cap bolt
  • piston pin
  • cap roller bearing
  • rod cap
Q.21

The characteristic that is enhanced by the honing of cylinder sleeves inner surface is

  • cooling efficiency
  • resistance to wear
  • lubrication performance
  • none of these
Q.22

The firing order for an opposed four cylinder l.C. engine is

  • 1-2-3-4
  • 1-3-4-2
  • 1-4-3-2
  • 1-3-24
Q.23

The ease with which petrol vapourizes is called its

  • oxidation
  • octane number
  • volatility
  • cetane number
Q.24

In a four speed four-stroke Diesel engine, the intake valve

  • opens at T.D.C. and closes at B.D.C.
  • opens at 20° before T.D.C. and closes at 35° after B.D.C.
  • opens at 10° after T.D.C. and closes at 20° before B.D.C.
  • none of the above
Q.25

The service brakes employed in cars are generally operated

  • mechanically
  • hydraulically
  • pneumatically
  • none of these
Q.26

The rating of C.I. engine fuel (Diesel) is given by

  • octane number
  • performance number
  • cetane number
  • none of these
Q.27

The anti-knock property of compression ignition engine fuel can be improved by adding

  • tetraethyl lead
  • trimethyl pentane
  • amyl nitrate
  • hexadecane
Q.28

Clutch facings are usually attached to the plate by

  • steel rivets
  • brass rivets
  • aluminium screws
  • steel screws
Q.29

Instead of valves, the ports are used in case of

  • four stroke I.C. engines
  • two-stroke I.C. engines
  • V-6 engines
  • none of these
Q.30

The function of positive crankcase ventilation (PCV) system is that it

  • mixes fuel with air
  • promotes combustion by creating a swirling movement in the air-fuel mixture
  • returns blow-by gases from the crankcase to the intake system
  • feeds blow-by gases to the exhaust manifold
Q.31

A four-cylinder engine has a capacity of 2.4 litres. The swept volume of one cylinder is

  • 400 cm3
  • 600 cm3
  • 1200 cm3
  • 2400 cm3
Q.32

When the top of the wheel is tilted outward, then it is called

  • positive camber
  • negative camber
  • positive caster
  • negative caster
Q.33

The starting system includes

  • a battery, a starter, and an ignition switch
  • a battery, a distributor, and an ignition switch
  • a battery, a starter, and a distributor
  • a distributor, a starter, and an ignition switch
Q.34

The two kinds of piston rings are

  • compression and oil-control rings
  • compression and sliding seal rings
  • oil scrapper and oil-control rings
  • pressure and sealing rings
Q.35

An imbalance wheel during vehicle operation

  • makes large noise when its heavy point hits the road surface
  • deflects in the vehicle's longitudinal direction
  • bounces vertically or deflects from side to side (as seen from front or rear)
  • creates a standing wave
Q.36

The purpose of transmission in an automobile is

  • to vary the speed of automobile
  • to vary the torque at the wheels
  • to vary the power of automobile
  • none of these
Q.37
The power source for a brake booster is
  • Exhaust manifold pressure
  • Electricity
  • The pressure difference between the atmospheric pressure and the vacuum pressure in the intake manifold
  • Hydraulic pump
Q.38
The firing order for an in-line four cylinder I.C. engine is
  • 1-2-3-4
  • 1-3-4-2
  • 1-2-4-3
  • 1-3-2-4
Q.39
The condition that causes vapour locking in a brake system is
  • Overheating of the fluid due to frequent brake application
  • Overcooling of the brakes during high speed driving
  • Keeping the vehicle without use for an extended period
  • An excessively high engine speed on a downhill road
Q.40
The device for smoothening out the power impulses from the engine is called
  • Clutch
  • Differential
  • Flywheel
  • Torque converter
Q.41
The component that connects the steering rack to the knuckles is
  • tie-rod
  • sector gear
  • pivot
  • spline
Q.42
Which of the following indicates a multigrade oil ?
  • SAE 30
  • API SF
  • SAE 20 W-50
  • API 50
Q.43
The cetane number of a Diesel fuel is a measure of
  • volatility
  • viscosity
  • ignition quality
  • delay peirod
Q.44
The air gap between the central electrode and ground (or side) electrode of a spark plug is around
  • 0.2 mm
  • 0.5 mm
  • 1 mm
  • 1.5 mm
Q.45
The cetane rating of Diesel fuel is in the order of
  • 25
  • 45
  • 70
  • 90
Q.46
The most commonly used supplementary restraint system (SRS) component is
  • seat belt
  • brake
  • airbag
  • steering
Q.47
The compression ratio in petrol engine is kept less than in Diesel engine because
  • it makes petrol engines lighter
  • higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition
  • less compression ratio gives better performance
  • it is just customary to have less compression ratio in petrol engines
Q.48
The main function of the tread pattern on tyre is that
  • the tread grooves pass air between the tyre and road surface, thereby preventing tyre from overheating
  • the crests between the tread grooves absorb road noise
  • in wet conditions, the tread grooves expel water that is drawn between the tyre and road surface
  • the tread pattern protects the tyre's inner carcass from small stones and pieces of glass
Q.49
The tilting of the front wheels away from the vertical, when viewed from the front of the car, is called
  • camber
  • caster
  • toe-in
  • toe-out
Q.50
In a fuel injection system, the electronic control module (ECM) calculates the optimum fuel-injection volume for the engine condition based on the data received from the sensors, and injects this volume of fuel into the intake manifold at the optimum timing.
  • Correct
  • Incorrect
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