Q.1

The combustion process in a Diesel engine is a

  • constant volume process
  • constant pressure process
  • constant temperature process
  • adiabatic process
Q.2

Damper is also known as

  • shock absorber
  • torsion bar
  • spring
  • radius rod
Q.3

The included angle is the sum of the

  • camber and castor
  • castor and S.A.I
  • camber and S.A.I.
  • camber and toe-in
Q.4

The function of oil-control rings is that it

  • lubricates the cylinder wall by releasing oil from its hole
  • keeps the cylinder wall lubricated by holding oil in its channel
  • prevents engine oil from going into the combustion chamber and returns excess lubricating oil off the cylinder wall through the return holes in the piston to the oil pan
  • maintains a seal and prevents escape of burned gases and oil leakage
Q.5

The size of engine cylinder is referred in terms of its

  • diameter and bore
  • displacement and efficiency
  • bore and stroke
  • bore and length
Q.6

In a petrol engine, the high voltage for spark plug is in the order of

  • 1000 volts
  • 2000 volts
  • 11 kilovolts
  • 22 kilovolts
Q.7

Two advantages of using helical gears rather than spur gears in a transmission system are

  • strength and cost
  • strength and less end thrust
  • noise level and strength
  • noise level and economy
Q.8

The driveshafts are connected to the differential and wheel hubs through universal joints because the universal joints

  • absorb the vibrations transferred from the surface of the road
  • compensate for variations in the relative positions of the differential and the wheels which result from bumpy road surfaces or other similar driving conditions.
  • absorb any difference in speed between the left and right wheels when the vehicle is turning
  • none of the above
Q.9

In petrol engines, during suction stroke, __________ is drawn in the cylinder

  • air and fuel
  • only fuel
  • only air
  • none of these
Q.10

The lower cylindrical portion of the piston which improves piston cooling performance is called

  • piston crown
  • connecting rod
  • piston pin boss
  • piston skirt
Q.11

When cornering, the differential generates a difference in the speed of the left and right wheels.

  • True
  • False
Q.12

An under-inflated tyre will wear the tread most

  • near the centre
  • near the edges
  • in the lateral direction
  • in the cross direction
Q.13

When the front wheels of a vehicle are locked during braking, then

  • stopping distance becomes extremely long
  • front tyres skid across the road surface, and the vehicle spins around
  • rear tyres skid across the road surface, and the vehicle spins around
  • driver loses control over the steering, and the vehicle continues moving in its current direction
Q.14

Caster is a

  • forward tilt of the kingpin
  • backward tilt of the kingpin
  • either 'a' or 'b'
  • none of these
Q.15

The damper fluid leakage typically occur from

  • upper damper mounting
  • bottom of damper
  • clearance between inner and outer tubes of damper
  • coil spring mounting
Q.16

The main characteristics of a maintenance-free (MF) battery is that

  • a maintenance-free battery requires little maintenance during normal use and it is sufficient to add water instead of an electrolyte containing sulphuric acid
  • a maintenance-free battery has a relatively short shelf life when compared with standard batteries
  • since it is sealed, the water in a maintenance-free battery is not lost through evaporation thus accordingly it is not necessary to top up the cells with water
  • recharging of a maintenance-free battery is neither required nor possible
Q.17

Which of the following parameter can be adjusted by modifying the tie-rod attachment length ?

  • Camber
  • Caster
  • Toe
  • Steering gear ratio
Q.18

The purpose of a cylinder head gasket is to

  • prevent the combustion gases from leaking from the joint between the cylinder block and the cylinder head
  • prevent engine oil from going into combustion chamber
  • removes impurities from cylinder head lubricating oil
  • none of the above
Q.19

In order to implement gear changes in the gear unit of an automatic transmission, a __________ is used.

  • synchronizer
  • planetary gear
  • magnetic clutch
  • hydraulic multi plate clutch
Q.20

The function of antilock brake system (ABS) is that is

  • reduces the stopping distance
  • minimises the brake fade
  • maintains directional control during braking by preventing the wheels from locking
  • prevents nose dives during braking and thereby postpones locking of the wheels
Q.21

If clearance volume of I.C. engines is increased, the compression ratio will

  • increase
  • decrease
  • remain constant
  • be doubled
Q.22

The auto ignition in a spark ignition engine means

  • automatic ignition of the charge at the end of compression
  • ignition induced by the passage of a spark
  • ignition of the charge before the passage of flame front
  • ignition induced to supplement the process of normal combustion
Q.23

The order in which effort applied to the steering wheel is transferred to the front wheel is

  • steering wheel - steering gearbox - steering shaft - tie rod - steering knuckle - front wheels
  • steering wheel - steering shaft - steering gearbox - tie rod - steering kunckle -front wheels
  • steering wheel - steering shaft - steering gearbox - steering knuckle - tie rod - front wheels
  • steering wheel - tie rod - steering gearbox - steering shaft - steering knuckle - front wheels
Q.24

A front stabilizer bar is used to

  • increase vehicle load-carrying capacity
  • provide a softer ride
  • control suspension movement and body roll
  • all of the above
Q.25

The compression ratio of a petrol engine is nearly

  • 4:1
  • 8:1
  • 15:1
  • 20:1
Q.26

The most accurate ignition system of a spark ignition engine is

  • magneto system
  • battery system
  • electronic control unit system
  • magneto and electronic system
Q.27

The main feature of MacPherson strut suspension is that

  • the vertical size of the suspension can be made more compact
  • non-vertical external forces are supported by the suspension arms
  • the unsprung mass in lighter
  • the assembly is slightly more complicated in design
Q.28

When the brake pedal free play is less than the specified value, then the

  • brake drags
  • brake fades
  • vapour locking occurs in the brake lines
  • antilock braking system malfunctions
Q.29

A worm gear is used as the pinion for the rack and pinion type of steering gearbox, because it

  • improves steering comfort when steering wheel is turned to effect small changes in the direction of forward motion
  • allows the steering wheel to be turned by a greater amount when steering
  • makes the steering more responsive
  • reduces the amount of kick-back for large steering angles
Q.30

The basic function of the suspension is to

  • absorb vibration and impact forces from the road surface
  • ensure that the steering wheel can deliver a suitable amount of steering force
  • ensure that wheel alignment is not disturbed during driving
  • automatically correct the effects of over steering
Q.31

Two general types of tyres are

  • tube type and tubeless
  • solid and tubeless
  • air and pneumatic
  • split-rim and drop centre
Q.32

The best fuels for compression ignition engines are

  • straight chain paraffins
  • aromatics
  • branched chain paraffins
  • napthalenes
Q.33

The timing belt is attached to the camshaft pulley and

  • timing belt drive pulley
  • distributor
  • radiator fan pulley
  • alternator pulley
Q.34

The rigid suspension is beneficial when

  • it is desired to reduce the unsprung mass
  • it is desired to have more flexibility in design
  • it is desired to improve tyre-to-ground contact characteristics
  • large changes in load make it necessary to have a large suspension stroke
Q.35

The main function of a resonator is that it

  • regulates the intake air flow rate
  • reduces the intake air noise .
  • enhances intake efficiency
  • regulates the intake air temperature
Q.36

The lubrication oil flow in an engine is in the order as

  • oil strainer - oil pump - relief valve - oil filter - cylinder block - cylinder head - oil pan
  • oil pump - oil strainer - relief valve - oil filter - cylinder block - cylinder head - oil pan
  • oil strainer - oil filter - relief valve - oil pump - cylinder block - cylinder head - oil pan
  • oil strainer - oil pump - relief valve - oil filter - cylinder head - cylinder block - oil pan
Q.37

The purpose of turning radius gauges is to measure the

  • contact areas of the tyres
  • free play of the steering wheel
  • turning radius of the left and right wheels
  • difference in the toe angles of the left and right wheels
Q.38

The smooth shift mechanism of an automatic transmission reduces the degree of shock at shifting of gears.

  • Yes
  • No
Q.39

The braking control type traction control system (TCS) generally operates in the speed range of

  • less than 20 kmph
  • less than 40 kmph
  • less than 60 kmph
  • more than 60 kmph
Q.40

The stroke of an engine is the

  • volume of the cylinder
  • length of the connecting rod
  • internal diameter of the cylinder
  • distance between T.D.C. and B.D.C.
Q.41

The painting of automobiles is done to

  • prevent rust from growing on the body
  • improve its external appearance
  • retain the characteristics of steel for long
  • all of these
Q.42

The exhaust gas from petrol engine contains

  • petrol vapours
  • water vapours
  • carbon monoxide
  • all of these
Q.43

The three basic cylinder arrangements for automotive engines are

  • flat, radial, and V
  • in a row, in line, and opposed
  • in line, V, and opposed
  • V, double row, and opposed
Q.44

The seat belt will move out smoothly when pulled out slowly, but it will lock when pulled quickly.

  • Agree
  • Disagree
Q.45

If the spark plug deposit indicates black coating of soot, it indicates that the engine has been generally operating on

  • too lean mixture
  • stoichiometric mixture
  • most economical mixture
  • too rich mixture
Q.46

The function of a second ring is that it is a

  • back up compression ring which will work in place of the top ring when it is broken
  • compression ring and aids the top ring in sealing and cooling
  • back up oil control ring which will work in place of the bottom ring when it is broken
  • cushion ring which prevents piston slap and knock
Q.47

The main task of a battery in automobiles is to

  • supply electricity to the alternator
  • act as a reservoir or stabilizer of electricity
  • supply electricity to the vehicle's electrical system at all times while the engine is running
  • supply a large amount of power to turn the starter motor when the engine is being started
Q.48

In case of a Diesel car, the pressure at the end of compression is of the order of

  • 15 bar
  • 25 bar
  • 35 bar
  • 45 bar
Q.49

The function of a radiator fan in the cooling system is that

  • it blows air through the radiator when necessary
  • it is turned by wind force as the vehicle moves forward, and its rotation drives the water pump
  • it cools the engine by blowing air onto the cylinder block
  • it draws heat out of the engine compartment
Q.50

The torque converter uses __________ to transfer torque.

  • air
  • automatic transmission fluid (ATF)
  • gears
  • steel belt
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