Automobile Engineering Practice Set-7

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

Tilt bracket

Steering yoke joint

Upper bracket

Lower bracket

2. The seat belt tensioners are built in the

Seat belt retractors

Seat belt buckles

Front seats

Shoulder anchors

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

Less chances of running flat

Better fuel efficiency

Slow air leakage

All of these

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

Frictional power

None of these

Brake power

Indicated power

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

Ambient temperature

25°C

35°C

20°C

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

One

Four

Two

Eight

7. The calorific value of Diesel is about

42.5 MJ/kg

36.5 MJ/kg

45.5 MJ/kg

38.5 MJ/kg

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

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

None of the above

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.

9. The basic function of the suspension is to

Automatically correct the effects of over steering

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

Absorbs vibration and impact forces from the road surface

Ensure that wheel alignment is not disturbed during driving

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

Spray atomized fuel in the cylinder

Provide flame front for ignition

Mix the fuel and air

Ignite the air-fuel mixture

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11. Two general types of tyres are

Tube type and tubeless

Air and pneumatic

Split rim and drop centre

Solid and tubeless

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

Using catalytic converter

None of these

Using some additives in the fuel

Recirculating exhaust

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

All of the above

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

Air temperature ignites the fuel in the Diesel engine

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

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

Positive caster

Negative camber

Negative caster

Positive camber

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

Vapour locking has no effect on brake performance

Brakes function more effectively

Brake operation is delayed after depression of the brake pedal

Brakes fail completely

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

Cushion ring which prevents piston slap and knock

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

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

17. Damper in an automobile is used to

Absorb the energy

Increase the energy

Release the energy

Dissipate the energy

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

10:1

15:1

13:1

17:1

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

Valve stems

Camshaft pulley

Rocker arms

Pistons

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

Centre

Corners

None of these

Edges

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

Brake power

Specific air consumption

Mean effective pressure

Compression ratio

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

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

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

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

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

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

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

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

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

Engine piston

Jacket cooling water

Lubricating oil

Engine cylinder

25. The function of a connecting rod is

To drive the drive plate

To turn the flywheel

To transmit motion of the piston to the crankshaft

To drive the fuel pump

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

Connecting rod

Piston pin boss

Piston skirt

Piston crown

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

Cushion springs

Central hub

Coil springs known as torsional springs

Clutch pedal

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

Remain constant

Decrease

Be doubled

Increase

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

45 bar

25 bar

35 bar

15 bar

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

8

4

6

2

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

Makes chemicals by mechanical means

Has curved plates instead of flat plates

Uses chemical action to provide electricity

Does not use an electrolyte

32. Petrol that detonates easily is called

High octane petrol

Unleaded petrol

Low octane petrol

Blended fuel

33. Clutch facings are usually attached to the plate by

Steel rivets

Steel screws

Aluminium screws

Brass rivets

34. The function of oil control rings is that it

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

Keeps the cylinder wall lubricated by holding oil in its channel

Lubricates the cylinder wall by releasing oil from its hole

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

35. The parking brakes employed in vehicles are operated

Pneumatically

None of these

Hydraulically

Mechanically

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

90°

130°

60°

45°

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

Cap bolt

Rod cap

Cap roller bearing

Piston pin

38. An imbalance wheel during vehicle operation

Deflects in the vehicle's longitudinal direction

Creates a standing wave

Makes large noise when its heavy point hits the road surface

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

39. The purpose of transmission in an automobile is

None of these

To vary the speed of automobile

To vary the power of automobile

To vary the torque at the wheels

40. The cam shaft in an engine is always mounted

Perpendicular to the crankshaft

None of these

Inclined to the crankshaft

Parallel to the crankshaft

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41. 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 economy

Noise level and strength

42. One effect of detonation is

Delay in ignition

Loss of power

Overheating of engine

Overcooling of engine

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

Crankshaft

Cylinder block

Cylinder head

Oil pan

Automobile Engineering Practice Set-7

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