Automobile Engineering Practice Set-7

Page 1 of 5

1. The purpose of transmission in an automobile is

To vary the power of automobile

To vary the torque at the wheels

To vary the speed of automobile

None of these

2. 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

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

Indicated power

None of these

Brake power

Frictional power

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

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

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

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

Eight

Two

One

Four

6. The calorific value of Diesel is about

42.5 MJ/kg

38.5 MJ/kg

36.5 MJ/kg

45.5 MJ/kg

7. The basic function of the suspension is to

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

Ensure that wheel alignment is not disturbed during driving

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

8

2

4

6

9. The function of a connecting rod is

To transmit motion of the piston to the crankshaft

To turn the flywheel

To drive the fuel pump

To drive the drive plate

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

Cylinder head

Crankshaft

Oil pan

Cylinder block

Page 2 of 5

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

Slow air leakage

All of these

Better fuel efficiency

Less chances of running flat

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

Piston skirt

Piston pin boss

Piston crown

Connecting rod

13. Petrol that detonates easily is called

Blended fuel

Low octane petrol

High octane petrol

Unleaded petrol

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

Cap roller bearing

Cap bolt

Rod cap

Piston pin

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

Brake power

Specific air consumption

Compression ratio

Mean effective pressure

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

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

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

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

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

Engine cylinder

Lubricating oil

Engine piston

Jacket cooling water

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

Ambient temperature

25°C

20°C

35°C

19. The cam shaft in an engine is always mounted

None of these

Inclined to the crankshaft

Parallel to the crankshaft

Perpendicular to the crankshaft

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

Vapour locking has no effect on brake performance

Brakes function more effectively

Brakes fail completely

Brake operation is delayed after depression of the brake pedal

Page 3 of 5

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

Corners

Edges

Centre

None of these

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

Tilt bracket

Upper bracket

Steering yoke joint

Lower bracket

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

Strength and cost

Noise level and strength

Strength and less end thrust

Noise level and economy

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

130°

45°

90°

60°

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

Using catalytic converter

Recirculating exhaust

Using some additives in the fuel

None of these

26. The parking brakes employed in vehicles are operated

Pneumatically

Mechanically

Hydraulically

None of these

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

Decrease

Be doubled

Remain constant

Increase

28. Clutch facings are usually attached to the plate by

Steel rivets

Aluminium screws

Brass rivets

Steel screws

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

None of the above

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

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.

30. The seat belt tensioners are built in the

Shoulder anchors

Front seats

Seat belt buckles

Seat belt retractors

Page 4 of 5

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

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

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

All of the above

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

Does not use an electrolyte

Makes chemicals by mechanical means

Uses chemical action to provide electricity

Has curved plates instead of flat plates

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

Coil springs known as torsional springs

Cushion springs

Clutch pedal

Central hub

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

Pistons

Rocker arms

Camshaft pulley

Valve stems

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

Positive caster

Positive camber

Negative caster

Negative camber

36. Damper in an automobile is used to

Dissipate the energy

Release the energy

Absorb the energy

Increase the energy

37. The function of oil control rings is that it

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

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

38. 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

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

Provide flame front for ignition

Spray atomized fuel in the cylinder

Mix the fuel and air

Ignite the air-fuel mixture

40. One effect of detonation is

Overcooling of engine

Loss of power

Delay in ignition

Overheating of engine

Page 5 of 5

41. 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

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

Compression ring and aids the top ring in sealing and cooling

42. Two general types of tyres are

Solid and tubeless

Tube type and tubeless

Air and pneumatic

Split rim and drop centre

43. 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

Creates a standing wave

Deflects in the vehicle's longitudinal direction

Automobile Engineering Practice Set-7

Related

Leave a ReplyCancel reply

Secured Payments

Protection

Automobile Engineering Practice Set-7

Share this Now with Friends:

Related

Leave a ReplyCancel reply

Secured Payments

Protection