Automobile Engineering Practice Set-6

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

Continually recharges the battery

Partly converts engine power into electric power

Supply electric power

Converts mechanical energy into electrical energy

2. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Reduces intake noise

Promotes the mixture of air and fuel

Cools the intake air to a suitable temperature

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

Poor recovery of the steering wheel after making a turn

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

Tendency to assume toe-out orientation

5. Bead wires are made of

Steel

Zinc

Copper

Aluminium

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

Larger than the positive terminal post

None of these

Of the same size as the positive terminal post

Smaller than the positive terminal post

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

Overheating of the engine

None of these

Incomplete valve closure

Fouling of spark plug by gasoline

8. The specific gravity of Diesel is about

0.95

0.75

0.85

0.65

9. Odometer is an instrument used for measurement of

Fuel consumption

Power

Engine r.p.m.

Distance

10. The Diesel engine works on

Diesel cycle

Otto cycle

Rankine cycle

Carnot cycle

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11. The specific gravity of petrol is about

0.75

1.25

0.85

0.95

12. Cushioning springs in clutch plate reduces

Vehicle speed

Jerky starts

Torsional vibrations

None of these

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

None of these

Small particles

Large particles

Sharp edged fragments

14. Tachometer in a vehicle measures

Speed

Fuel consumption

Engine r.p.m.

Distance

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

1-3-4-2

1-2-4-3

1-2-3-4

1-3-2-4

16. The function of a governor in automobiles is to

Maximise the fuel economy

Limit the vehicle speed

Limit the power

Maintain constant engine speed

17. Wheel base of a vehicle is the

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

Distance between the centres of the front tyres

Extreme length of the vehicle

18. The effect of having excess camber is

Excessive steering alignment torque

Uneven tyre wear

Hard steering

Too much traction

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

Rotate the tyres

Adjust the tyre pressure

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

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

Matadors

Tractors

Trucks

Passenger cars

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

Improved fuel efficiency

Improved emission

Improved power output

All of these

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

None of these

Exhaust volume

Clearance volume

Cylinder volume

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

Crank arm

Small end

Big end

Journal

24. The fuel that detonates easily, is

N-heptane

Iso-octane

Benzene

Alcohol

25. Which of the following oil is more viscous?

SAE 80

SAE 70

SAE 30

SAE 40

26. The brake pedal during ABS operation

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

Is pushed upward forcefully

All of the above

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

Head light bulb

Parking light bulb

Stop light bulb

Ignition warning bulb

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

Ineffectiveness of the brakes

Localized wearing of the brake pads

Rapid wearing of the brake pads

Judder during braking

29. 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

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

100

110

90

120

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

10%

5%

20%

15%

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

Meshes the gears

Operates the clutch

Moves the synchronizer

Selects the synchronizer

33. Engine misfiring is likely to result from

Spark plug gap too wide

Vapours lock in the fuel only

Incorrect fuel air mixture

Spark plug gap too small

34. The power source for a brake booster is

Electricity

Hydraulic pump

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

Exhaust manifold pressure

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

Maintain directional control

Prevent uneven tyre wear

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

Compensate for wear in the steering linkage

36. The valve tappet clearance is measured by

Vernier caliper

Screw pitch gauge

Feeler gauge

Engineering scale

37. 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)

2 × P.L.A.N

P.L.A.N/4

P.L.A.N

P.L.A.N/2

38. 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; each pinion gear meshes with a different side gear.

The differential carrier houses differential pinion gears and side gears.

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

39. The ease with which petrol vaporizes is called its

Oxidation

Volatility

Octane number

Cetane number

40. The parking brake generally acts on

Rear wheels

Propeller shaft

Front wheels

Front and rear wheels

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

82

175

65

14

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

1.00

2.81

1.28

1.82

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

Exhaust gas volume

Air temperature

Air flow speed

Air-fuel ratio

44. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Carbon disulphide

Freon-12

Ammonium chloride

45. The Diesel engines are also known as

Compression ignition (C.I.) engines

None of these

Spark ignition (S.I.) engines

Steam engines

Automobile Engineering Practice Set-6

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