Automobile Engineering Practice Set-6

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1. The fuel that detonates easily, is

Benzene

Alcohol

N-heptane

Iso-octane

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

Passenger cars

Matadors

Trucks

Tractors

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

Ignition warning bulb

Parking light bulb

Stop light bulb

Head light bulb

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

65

82

175

14

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

1-3-4-2

1-2-4-3

1-3-2-4

1-2-3-4

6. Bead wires are made of

Aluminium

Zinc

Steel

Copper

7. The specific gravity of Diesel is about

0.95

0.75

0.85

0.65

8. 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

Extreme length of the vehicle

Distance between the centres of the front tyres

9. The function of a governor in automobiles is to

Limit the vehicle speed

Maintain constant engine speed

Maximise the fuel economy

Limit the power

10. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Ammonium chloride

Freon-12

Carbon disulphide

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11. 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

2 × P.L.A.N

P.L.A.N

P.L.A.N/4

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

Meshes the gears

Selects the synchronizer

Operates the clutch

Moves the synchronizer

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

Adjust the damper spring tension

Rotate the tyres

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

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

Small particles

Large particles

Sharp edged fragments

None of these

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

Exhaust volume

Clearance volume

None of these

Cylinder volume

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

Rapid wearing of the brake pads

Localized wearing of the brake pads

Ineffectiveness of the brakes

Judder during braking

17. The Diesel engines are also known as

None of these

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

Steam engines

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

120

90

110

100

19. The main function of intake manifold is that it

Promotes the mixture of air and fuel

Reduces intake noise

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

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

1.00

2.81

1.28

1.82

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

None of these

Splashing action of the crankshaft

Gravity

The pressure created by the oil pump

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

Larger than the positive terminal post

Smaller than the positive terminal post

Of the same size as the positive terminal post

None of these

23. The valve tappet clearance is measured by

Feeler gauge

Engineering scale

Screw pitch gauge

Vernier caliper

24. Odometer is an instrument used for measurement of

Power

Engine r.p.m.

Fuel consumption

Distance

25. Tachometer in a vehicle measures

Fuel consumption

Speed

Distance

Engine r.p.m.

26. The brake pedal during ABS operation

All of the above

Is pushed upward forcefully

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

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

Maintain directional control

Compensate for wear in the steering linkage

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

Prevent uneven tyre wear

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

Fouling of spark plug by gasoline

None of these

Incomplete valve closure

Overheating of the engine

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

Partly converts engine power into electric power

Supply electric power

Converts mechanical energy into electrical energy

Continually recharges the battery

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

Tendency to assume toe-out orientation

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

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31. Which of the following oil is more viscous?

SAE 40

SAE 70

SAE 80

SAE 30

32. The ease with which petrol vaporizes is called its

Oxidation

Cetane number

Volatility

Octane number

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

Improved fuel efficiency

All of these

Improved power output

Improved emission

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

The differential carrier houses differential pinion gears and side gears.

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

15%

20%

10%

5%

36. The effect of having excess camber is

Uneven tyre wear

Too much traction

Hard steering

Excessive steering alignment torque

37. The specific gravity of petrol is about

0.95

1.25

0.85

0.75

38. The parking brake generally acts on

Propeller shaft

Front and rear wheels

Rear wheels

Front wheels

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

Belt driven by drive-shaft

Chain driven by crankshaft

Belt driven by crankshaft

Belt driven by camshaft

40. Cushioning springs in clutch plate reduces

None of these

Torsional vibrations

Vehicle speed

Jerky starts

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

Crank arm

Small end

Big end

Journal

42. 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

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

Air flow speed

Air temperature

Air-fuel ratio

Exhaust gas volume

44. The power source for a brake booster is

Exhaust manifold pressure

Hydraulic pump

Electricity

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

45. The Diesel engine works on

Rankine cycle

Otto cycle

Carnot cycle

Diesel cycle

Automobile Engineering Practice Set-6

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Automobile Engineering Practice Set-6

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