Automobile Engineering Practice Set-6

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

None of these

Large particles

Sharp edged fragments

Small particles

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

15%

20%

5%

10%

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

All of these

Improved power output

Improved fuel efficiency

Improved emission

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

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

Poor recovery of the steering wheel after making a turn

Tendency to assume toe-out orientation

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

Clearance volume

Cylinder volume

Exhaust volume

None of these

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

None of these

Gravity

Splashing action of the crankshaft

The pressure created by the oil pump

7. Bead wires are made of

Aluminium

Zinc

Steel

Copper

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

Parking light bulb

Stop light bulb

Ignition warning bulb

Head light bulb

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

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

The differential carrier houses differential pinion gears and side gears.

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.

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

65

175

14

82

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11. The power source for a brake booster is

Electricity

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

Hydraulic pump

Exhaust manifold pressure

12. The function of a governor in automobiles is to

Maximise the fuel economy

Limit the power

Maintain constant engine speed

Limit the vehicle speed

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

Operates the clutch

Moves the synchronizer

Meshes the gears

Selects the synchronizer

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

1.00

1.28

1.82

2.81

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

Matadors

Trucks

Tractors

Passenger cars

16. The effect of having excess camber is

Hard steering

Uneven tyre wear

Excessive steering alignment torque

Too much traction

17. The commonly used antifreeze solution in automobiles is

Freon-12

Ammonium chloride

Carbon disulphide

Ethylene glycol

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

Judder during braking

Ineffectiveness of the brakes

Rapid wearing of the brake pads

Localized wearing of the brake pads

19. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Reduces intake noise

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

20. The Diesel engine works on

Carnot cycle

Otto cycle

Rankine cycle

Diesel cycle

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21. Cushioning springs in clutch plate reduces

Torsional vibrations

Vehicle speed

None of these

Jerky starts

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

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

Adjust the tyre pressure

23. The brake pedal during ABS operation

Pedal stroke becomes longer

Is pushed upward forcefully

All of the above

Transmits slight kickback to the driver's foot

24. Engine misfiring is likely to result from

Spark plug gap too small

Vapours lock in the fuel only

Incorrect fuel air mixture

Spark plug gap too wide

25. Odometer is an instrument used for measurement of

Engine r.p.m.

Fuel consumption

Distance

Power

26. The fuel that detonates easily, is

Iso-octane

N-heptane

Benzene

Alcohol

27. The specific gravity of Diesel is about

0.85

0.75

0.65

0.95

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

Supply electric power

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

Continually recharges the battery

29. Which of the following oil is more viscous?

SAE 30

SAE 80

SAE 70

SAE 40

30. The parking brake generally acts on

Front wheels

Front and rear wheels

Rear wheels

Propeller shaft

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31. The ease with which petrol vaporizes is called its

Octane number

Volatility

Cetane number

Oxidation

32. The valve tappet clearance is measured by

Screw pitch gauge

Feeler gauge

Engineering scale

Vernier caliper

33. 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/2

P.L.A.N/4

34. 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

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

Belt driven by camshaft

Belt driven by drive-shaft

Chain driven by crankshaft

Belt driven by crankshaft

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

Small end

Journal

Big end

Crank arm

37. The Diesel engines are also known as

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

None of these

Steam engines

38. Tachometer in a vehicle measures

Engine r.p.m.

Speed

Fuel consumption

Distance

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

None of these

Incomplete valve closure

Overheating of the engine

Fouling of spark plug by gasoline

40. The specific gravity of petrol is about

0.75

0.85

1.25

0.95

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41. 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

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

None of these

Smaller than the positive terminal post

Larger than the positive terminal post

Of the same size as the positive terminal post

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

90

120

100

110

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

1-3-4-2

1-3-2-4

1-2-3-4

1-2-4-3

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

Compensate for wear in the steering linkage

Maintain directional control

Prevent uneven tyre wear

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

Automobile Engineering Practice Set-6

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