Automobile Engineering Practice Set-7

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1. In a single dry plate clutch, torsional vibrations are absorbed by

Cushion springs

Clutch pedal

Central hub

Coil springs known as torsional springs

2. An imbalance wheel during vehicle operation

Bounces vertically or deflects from side to side (as seen from front or rear)

Makes large noise when its heavy point hits the road surface

Deflects in the vehicle's longitudinal direction

Creates a standing wave

3. The battery is an electrochemical device, which means battery

Uses chemical action to provide electricity

Has curved plates instead of flat plates

Does not use an electrolyte

Makes chemicals by mechanical means

4. Damper in an automobile is used to

Release the energy

Absorb the energy

Increase the energy

Dissipate the energy

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

45°

130°

60°

90°

6. The correct flow of power through the drive train is

Engine drive shafts, clutch, main shaft, counter shaft, final driven gear, wheels

Engine clutch, counter shaft, main shaft, final driven gear, drive shafts, wheels

Engine main shaft, counter shaft, clutch, final driven gear, drive shafts, wheels

Engine clutch, main shaft, counter shaft, final driven gear, drive shafts, wheels

7. The cam shaft in an engine is always mounted

Parallel to the crankshaft

None of these

Inclined to the crankshaft

Perpendicular to the crankshaft

8. A basic difference between the spark ignition engine and the Diesel engine is that the

All of the above

Diesel engine compresses air alone instead of an air-fuel mixture

Air temperature ignites the fuel in the Diesel engine

Fuel is sprayed into the combustion chamber in the Diesel engine as the piston nears T.D.C. on the compression stroke

9. The number of exhaust manifolds in a V6 engine is

Four

Eight

Two

One

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

Connecting rod

Piston crown

Piston pin boss

Piston skirt

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11. If the air-fuel mixture in a spark ignition engine is too rich, then air-fuel ratio is about

17:1

15:1

13:1

10:1

12. An overinflated tyre will wear the tread most near the

Corners

Edges

Centre

None of these

13. In vehicles with tilt steering, the steering column is pivoted in

Upper bracket

Lower bracket

Tilt bracket

Steering yoke joint

14. The calorific value of Diesel is about

38.5 MJ/kg

45.5 MJ/kg

36.5 MJ/kg

42.5 MJ/kg

15. In a four speed four stroke Diesel engine, the intake valve

Opens at T.D.C. and closes at B.D.C.

Opens at 10° after T.D.C. and closes at 20° before B.D.C.

Opens at 20° before T.D.C. and closes at 35° after B.D.C.

None of the above

16. The advantage of a tubeless tyre over tube type tyre is

Better fuel efficiency

Less chances of running flat

All of these

Slow air leakage

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

35 bar

15 bar

45 bar

25 bar

18. The parking brakes employed in vehicles are operated

Mechanically

None of these

Pneumatically

Hydraulically

19. One effect of detonation is

Overheating of engine

Loss of power

Delay in ignition

Overcooling of engine

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

Be doubled

Remain constant

Decrease

Increase

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21. The temperature indicating instrument in vehicles indicates the temperature of

Jacket cooling water

Lubricating oil

Engine piston

Engine cylinder

22. The basic part of the engine, to which the other engine parts are attached or assembled is the

Cylinder block

Crankshaft

Oil pan

Cylinder head

23. The power actually developed inside the engine cylinder is called as

None of these

Frictional power

Brake power

Indicated power

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

Vapour locking has no effect on brake performance

Brake operation is delayed after depression of the brake pedal

Brakes fail completely

Brakes function more effectively

25. The advantage of having a tandem master cylinder arrangement in automobiles is that it

Supplies equal fluid pressure to each line of a divided line brake circuit, thereby preventing the brakes from dragging on one side

Enhances safety by activating the brakes using vacuum pressure in the event of brake fluid loss

Enhances safety by serving two independent lines in a divided line brake circuit

Boosts the brake fluid pressure to reduce the force required to depress the brake pedal

26. Petrol that detonates easily is called

Low octane petrol

Blended fuel

High octane petrol

Unleaded petrol

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

Provide flame front for ignition

Spray atomized fuel in the cylinder

Ignite the air-fuel mixture

Mix the fuel and air

28. Clutch facings are usually attached to the plate by

Steel screws

Brass rivets

Aluminium screws

Steel rivets

29. The purpose of transmission in an automobile is

To vary the speed of automobile

To vary the torque at the wheels

None of these

To vary the power of automobile

30. How many cells are used in a 12 volt car battery?

4

8

6

2

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31. The function of a second ring is that it is a

Back up oil control ring which will work in place of the bottom ring when it is broken

Compression ring and aids the top ring in sealing and cooling

Cushion ring which prevents piston slap and knock

Back up compression ring which will work in place of the top ring when it is broken

32. The function of a connecting rod is

To drive the drive plate

To transmit motion of the piston to the crankshaft

To turn the flywheel

To drive the fuel pump

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

Positive caster

Negative caster

Positive camber

Negative camber

34. The function of oil control rings is that it

Maintains a seal and prevents escape of burned gases and oil leakage

Keeps the cylinder wall lubricated by holding oil in its channel

Lubricates the cylinder wall by releasing oil from its hole

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

35. The seat belt tensioners are built in the

Shoulder anchors

Front seats

Seat belt buckles

Seat belt retractors

36. Two general types of tyres are

Tube type and tubeless

Solid and tubeless

Split rim and drop centre

Air and pneumatic

37. The most effective method of controlling S.I. engine exhaust emission is by

Recirculating exhaust

Using some additives in the fuel

Using catalytic converter

None of these

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

Noise level and strength

Noise level and economy

Strength and cost

Strength and less end thrust

39. The connecting rod is attached to the piston by the

Cap bolt

Cap roller bearing

Piston pin

Rod cap

40. The basic function of the suspension is to

Ensure that wheel alignment is not disturbed during driving

Ensure that the steering wheel can deliver a suitable amount of steering force

Automatically correct the effects of over steering

Absorbs vibration and impact forces from the road surface

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41. The temperature at which tyre inflation pressure should be checked is

Ambient temperature

25°C

35°C

20°C

42. The motion of the cam is transferred to the valves through

Camshaft pulley

Valve stems

Pistons

Rocker arms

43. When indicated power (I.P.) and frictional power (F.P.) are known, we can calculate

Compression ratio

Specific air consumption

Mean effective pressure

Brake power

Automobile Engineering Practice Set-7

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