Automobile Engineering Practice Set-7

Page 1 of 5

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

Cap bolt

Rod cap

Piston pin

Cap roller bearing

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

Tilt bracket

Upper bracket

Steering yoke joint

Lower bracket

3. Clutch facings are usually attached to the plate by

Steel rivets

Aluminium screws

Brass rivets

Steel screws

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

25°C

35°C

Ambient temperature

20°C

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

Using catalytic converter

Recirculating exhaust

None of these

Using some additives in the fuel

6. The purpose of transmission in an automobile is

To vary the torque at the wheels

To vary the speed of automobile

None of these

To vary the power of automobile

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

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

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

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

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

8. The basic function of the suspension is to

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

Absorbs vibration and impact forces from the road surface

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

Negative caster

Positive caster

Negative camber

Positive camber

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

Centre

None of these

Edges

Corners

Page 2 of 5

11. The seat belt tensioners are built in the

Seat belt buckles

Shoulder anchors

Front seats

Seat belt retractors

12. An imbalance wheel during vehicle operation

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)

Deflects in the vehicle's longitudinal direction

Creates a standing wave

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

Piston skirt

Piston crown

Piston pin boss

Connecting rod

14. 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

15. Petrol that detonates easily is called

High octane petrol

Unleaded petrol

Low octane petrol

Blended fuel

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

Indicated power

Brake power

None of these

Frictional power

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

4

2

8

6

18. Two general types of tyres are

Tube type and tubeless

Split rim and drop centre

Air and pneumatic

Solid and tubeless

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

Spray atomized fuel in the cylinder

Mix the fuel and air

Ignite the air-fuel mixture

Provide flame front for ignition

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

90°

130°

60°

45°

Page 3 of 5

21. One effect of detonation is

Overcooling of engine

Overheating of engine

Delay in ignition

Loss of power

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

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

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

23. The cam shaft in an engine is always mounted

Parallel to the crankshaft

Perpendicular to the crankshaft

Inclined to the crankshaft

None of these

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

All of these

Less chances of running flat

Better fuel efficiency

Slow air leakage

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

Mean effective pressure

Specific air consumption

Compression ratio

Brake power

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

Cylinder head

Oil pan

Crankshaft

Cylinder block

27. The function of a connecting rod is

To drive the fuel pump

To drive the drive plate

To transmit motion of the piston to the crankshaft

To turn the flywheel

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

13:1

10:1

17:1

15:1

29. 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

Lubricates the cylinder wall by releasing oil from its hole

Keeps the cylinder wall lubricated by holding oil in its channel

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

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

Pistons

Rocker arms

Camshaft pulley

Valve stems

Page 4 of 5

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

Brake operation is delayed after depression of the brake pedal

Vapour locking has no effect on brake performance

Brakes function more effectively

Brakes fail completely

32. The parking brakes employed in vehicles are operated

None of these

Hydraulically

Mechanically

Pneumatically

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

Coil springs known as torsional springs

Clutch pedal

Central hub

Cushion springs

34. 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

35. Damper in an automobile is used to

Release the energy

Increase the energy

Absorb the energy

Dissipate the energy

36. The calorific value of Diesel is about

38.5 MJ/kg

45.5 MJ/kg

42.5 MJ/kg

36.5 MJ/kg

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

Remain constant

Decrease

Be doubled

Increase

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

25 bar

15 bar

45 bar

35 bar

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

Compression ring and aids the top ring in sealing and cooling

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

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

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

Engine cylinder

Engine piston

Lubricating oil

Jacket cooling water

Page 5 of 5

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

Has curved plates instead of flat plates

Makes chemicals by mechanical means

Uses chemical action to provide electricity

Does not use an electrolyte

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

One

Eight

Four

Two

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

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

Air temperature ignites the fuel in the Diesel engine

All of the above

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