Automobile Engineering Practice Set-6

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

Improved emission

All of these

Improved fuel efficiency

Improved power output

2. Which of the following oil is more viscous?

SAE 40

SAE 30

SAE 70

SAE 80

3. 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

Judder during braking

Ineffectiveness of the brakes

4. The effect of having excess camber is

Hard steering

Too much traction

Excessive steering alignment torque

Uneven tyre wear

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

Sharp edged fragments

Large particles

None of these

Small particles

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

1-3-2-4

1-2-4-3

1-3-4-2

1-2-3-4

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

The vehicle to pull to the side of lesser inclination

Poor recovery of the steering wheel after making a turn

Generation of a braking effect at tight corners

Tendency to assume toe-out orientation

8. The valve tappet clearance is measured by

Engineering scale

Screw pitch gauge

Feeler gauge

Vernier caliper

9. The power source for a brake booster is

Hydraulic pump

Exhaust manifold pressure

Electricity

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

10. 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

Splashing action of the crankshaft

Gravity

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11. The fuel that detonates easily, is

Benzene

N-heptane

Alcohol

Iso-octane

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

Clearance volume

Exhaust volume

Cylinder volume

None of these

13. The function of a governor in automobiles is to

Maximise the fuel economy

Limit the vehicle speed

Limit the power

Maintain constant engine speed

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

Smaller than the positive terminal post

Of the same size as the positive terminal post

Larger than the positive terminal post

None of these

15. Engine misfiring is likely to result from

Incorrect fuel air mixture

Vapours lock in the fuel only

Spark plug gap too wide

Spark plug gap too small

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

Small end

Big end

Journal

Crank arm

17. The ease with which petrol vaporizes is called its

Volatility

Cetane number

Oxidation

Octane number

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

Selects the synchronizer

Meshes the gears

Operates the clutch

Moves the synchronizer

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

Air-fuel ratio

Exhaust gas volume

Air flow speed

Air temperature

20. The specific gravity of petrol is about

1.25

0.95

0.85

0.75

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

14

65

175

82

22. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Freon-12

Ethylene glycol

Ammonium chloride

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

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

Compensate for wear in the steering linkage

Prevent uneven tyre wear

Maintain directional control

24. The Diesel engine works on

Otto cycle

Diesel cycle

Carnot cycle

Rankine cycle

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

90

120

110

100

26. The brake pedal during ABS operation

Transmits slight kickback to the driver's foot

All of the above

Is pushed upward forcefully

Pedal stroke becomes longer

27. Odometer is an instrument used for measurement of

Power

Distance

Fuel consumption

Engine r.p.m.

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

Supply electric power

Continually recharges the battery

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

29. The parking brake generally acts on

Front wheels

Rear wheels

Propeller shaft

Front and rear wheels

30. 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

P.L.A.N/2

P.L.A.N/4

2 × P.L.A.N

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31. The Diesel engines are also known as

Spark ignition (S.I.) engines

Steam engines

None of these

Compression ignition (C.I.) engines

32. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

Reduces intake noise

Distributes intake air equally to the cylinders

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

Adjust the tyre pressure

Adjust the damper spring tension

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

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

20%

15%

5%

10%

35. Tachometer in a vehicle measures

Fuel consumption

Distance

Speed

Engine r.p.m.

36. Wheel base of a vehicle is the

Extreme length of the vehicle

Distance between the centres of the front tyres

Distance between the centres of the front and rear wheels

Distance between the centres of the rear tyres

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

Tractors

Trucks

Passenger cars

Matadors

38. Bead wires are made of

Aluminium

Zinc

Copper

Steel

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

Fouling of spark plug by gasoline

Incomplete valve closure

None of these

Overheating of the engine

40. 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

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41. Cushioning springs in clutch plate reduces

Vehicle speed

Jerky starts

Torsional vibrations

None of these

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

Chain driven by crankshaft

Belt driven by crankshaft

Belt driven by camshaft

Belt driven by drive-shaft

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

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.

44. The specific gravity of Diesel is about

0.95

0.65

0.75

0.85

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

1.00

1.82

1.28

2.81

Automobile Engineering Practice Set-6

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Automobile Engineering Practice Set-6

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