Automobile Engineering Practice Set-6

Page 1 of 5

1. The valve tappet clearance is measured by

Vernier caliper

Screw pitch gauge

Engineering scale

Feeler gauge

2. In a hydraulic power steering system, the power steering pump is driven by a

Belt driven by crankshaft

Belt driven by camshaft

Belt driven by drive-shaft

Chain driven by crankshaft

3. The forced fed lubrication system means that the oil is delivered to the engine by

None of these

The pressure created by the oil pump

Gravity

Splashing action of the crankshaft

4. The Diesel engine works on

Carnot cycle

Rankine cycle

Diesel cycle

Otto cycle

5. If a tyre is designated as 175/65 R-14 82-S, then the aspect ratio for the tyre is

65

14

175

82

6. A heat treated glass generally used in automobiles bursts into ________ upon cracking,

None of these

Sharp edged fragments

Large particles

Small particles

7. The gear shift lever requires two separate motions to shift gears, and the first movement

Meshes the gears

Selects the synchronizer

Moves the synchronizer

Operates the clutch

8. The advantage of the fuel injection system over the carburettor system is

Improved power output

All of these

Improved fuel efficiency

Improved emission

9. The ease with which petrol vaporizes is called its

Oxidation

Octane number

Cetane number

Volatility

10. The basic purpose of providing caster angle on wheels is to

Prevent uneven tyre wear

Maintain directional control

Compensate for wear in the steering linkage

Bring the road contact of the tyre under the point of load

Page 2 of 5

11. The specific gravity of acid in a fully charged battery is generally

1.00

1.28

2.81

1.82

12. The brake pedal during ABS operation

Transmits slight kickback to the driver's foot

All of the above

Pedal stroke becomes longer

Is pushed upward forcefully

13. Which one of the following statement correctly describes the construction of a bevel gear type differential?

The drive shafts are splined to the differential carrier.

The differential carrier houses differential pinion gears and side gears.

The differential carrier houses differential pinion gears and side gears; each pinion gear meshes with a different side gear.

The left side gear and the differential carrier rotate in constant unison.

14. Engine misfiring is likely to result from

Incorrect fuel air mixture

Spark plug gap too wide

Vapours lock in the fuel only

Spark plug gap too small

15. Bead wires are made of

Copper

Zinc

Aluminium

Steel

16. The parking brake generally acts on

Propeller shaft

Rear wheels

Front wheels

Front and rear wheels

17. The function of an alternator in an automobile is to

Partly converts engine power into electric power

Continually recharges the battery

Converts mechanical energy into electrical energy

Supply electric power

18. The specific gravity of Diesel is about

0.65

0.85

0.75

0.95

19. The specific gravity of petrol is about

1.25

0.75

0.85

0.95

20. Wheel base of a vehicle is the

Distance between the centres of the front tyres

Distance between the centres of the rear tyres

Extreme length of the vehicle

Distance between the centres of the front and rear wheels

Page 3 of 5

21. The indicated power of a four stroke engine (in watts) is equal to (where P = Mean effective pressure in N/m², L = Length of stroke in metres, A = Cross-sectional area of the piston in m², and N = Speed of the engine in revolutions per second (r.p.s)

P.L.A.N

2 × P.L.A.N

P.L.A.N/4

P.L.A.N/2

22. The power source for a brake booster is

The pressure difference between the atmospheric pressure and the vacuum pressure in the intake manifold

Hydraulic pump

Electricity

Exhaust manifold pressure

23. The firing order for an inline four cylinder I.C. engine is

1-2-4-3

1-3-4-2

1-3-2-4

1-2-3-4

24. The effect of having excess camber is

Too much traction

Excessive steering alignment torque

Uneven tyre wear

Hard steering

25. When the piston is at T.D.C., the volume above the piston in the combustion chamber is the

None of these

Clearance volume

Cylinder volume

Exhaust volume

26. Odometer is an instrument used for measurement of

Engine r.p.m.

Distance

Power

Fuel consumption

27. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Freon-12

Ammonium chloride

Ethylene glycol

28. The octane number of compressed natural gas (CNG) is

120

110

100

90

29. The negative terminal post on the top of a battery is

None of these

Of the same size as the positive terminal post

Larger than the positive terminal post

Smaller than the positive terminal post

30. Which of the following oil is more viscous?

SAE 30

SAE 40

SAE 70

SAE 80

Page 4 of 5

31. Which of the following symptom is caused as a result of brake disc run out?

Ineffectiveness of the brakes

Rapid wearing of the brake pads

Judder during braking

Localized wearing of the brake pads

32. Incorrect steering axis inclination (S.A.I.) causes

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

Poor recovery of the steering wheel after making a turn

33. Which of the following bulb in a car will have the least wattage?

Stop light bulb

Head light bulb

Parking light bulb

Ignition warning bulb

34. The fuel that detonates easily, is

Alcohol

Iso-octane

N-heptane

Benzene

35. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

Reduces intake noise

Promotes the mixture of air and fuel

36. The minimum parking brake force is generally ___________ of gross vehicle mass (GVM).

10%

20%

5%

15%

37. Cushioning springs in clutch plate reduces

Torsional vibrations

Jerky starts

None of these

Vehicle speed

38. The connecting rod lower end is connected to the relevant ________ of crankshaft.

Small end

Crank arm

Journal

Big end

39. The correct way to rectify an imbalanced wheel is to

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

Adjust the damper spring tension

40. The function of a governor in automobiles is to

Limit the power

Maximise the fuel economy

Limit the vehicle speed

Maintain constant engine speed

Page 5 of 5

41. Tachometer in a vehicle measures

Fuel consumption

Distance

Speed

Engine r.p.m.

42. The information provided by the oxygen (O₂) sensor to the feedback control system is about the

Air temperature

Exhaust gas volume

Air-fuel ratio

Air flow speed

43. The Diesel engines are also known as

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

None of these

Steam engines

44. Two speed reverse gear arrangements is generally provided in case of

Tractors

Trucks

Matadors

Passenger cars

45. If the valve clearances are excessively large, the problem that can arise is

Overheating of the engine

Incomplete valve closure

None of these

Fouling of spark plug by gasoline

Automobile Engineering Practice Set-6

Related

Leave a ReplyCancel reply

Secured Payments

Protection

Automobile Engineering Practice Set-6

Share this Now with Friends:

Related

Leave a ReplyCancel reply

Secured Payments

Protection