Automobile Engineering Practice Set-6

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

Big end

Journal

Crank arm

Small end

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

Splashing action of the crankshaft

None of these

The pressure created by the oil pump

Gravity

3. 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

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

Trucks

Passenger cars

Tractors

Matadors

5. Bead wires are made of

Copper

Aluminium

Steel

Zinc

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

82

14

175

65

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

Belt driven by drive-shaft

Belt driven by crankshaft

Belt driven by camshaft

Chain driven by crankshaft

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

Parking light bulb

Ignition warning bulb

Head light bulb

Stop light bulb

9. The valve tappet clearance is measured by

Feeler gauge

Engineering scale

Screw pitch gauge

Vernier caliper

10. The specific gravity of petrol is about

1.25

0.75

0.95

0.85

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

1.28

1.00

2.81

1.82

12. The main function of intake manifold is that it

Reduces intake noise

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

13. Which of the following oil is more viscous?

SAE 40

SAE 80

SAE 30

SAE 70

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

Air temperature

Exhaust gas volume

Air flow speed

Air-fuel ratio

15. Odometer is an instrument used for measurement of

Power

Engine r.p.m.

Distance

Fuel consumption

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

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

Maintain directional control

Prevent uneven tyre wear

Compensate for wear in the steering linkage

17. The ease with which petrol vaporizes is called its

Octane number

Volatility

Cetane number

Oxidation

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

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

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.

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

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

Adjust the damper spring tension

20. 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/4

2 × P.L.A.N

P.L.A.N/2

P.L.A.N

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21. The effect of having excess camber is

Excessive steering alignment torque

Uneven tyre wear

Too much traction

Hard steering

22. Engine misfiring is likely to result from

Incorrect fuel air mixture

Spark plug gap too wide

Spark plug gap too small

Vapours lock in the fuel only

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

None of these

Exhaust volume

Cylinder volume

Clearance volume

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

1-2-4-3

1-3-4-2

1-2-3-4

1-3-2-4

25. The power source for a brake booster is

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

Electricity

Hydraulic pump

Exhaust manifold pressure

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

120

90

100

110

27. The function of a governor in automobiles is to

Limit the vehicle speed

Limit the power

Maximise the fuel economy

Maintain constant engine speed

28. The Diesel engines are also known as

Steam engines

None of these

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

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

Localized wearing of the brake pads

Rapid wearing of the brake pads

Judder during braking

Ineffectiveness of the brakes

30. Wheel base of a vehicle is the

Extreme length of the vehicle

Distance between the centres of the front and rear wheels

Distance between the centres of the front tyres

Distance between the centres of the rear tyres

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

Of the same size as the positive terminal post

Smaller than the positive terminal post

Larger than the positive terminal post

None of these

32. Tachometer in a vehicle measures

Fuel consumption

Speed

Distance

Engine r.p.m.

33. The fuel that detonates easily, is

Alcohol

Iso-octane

Benzene

N-heptane

34. The parking brake generally acts on

Propeller shaft

Front wheels

Rear wheels

Front and rear wheels

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

Selects the synchronizer

Operates the clutch

Meshes the gears

Moves the synchronizer

36. The specific gravity of Diesel is about

0.85

0.75

0.65

0.95

37. 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

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

Improved fuel efficiency

All of these

Improved power output

Improved emission

39. Cushioning springs in clutch plate reduces

Vehicle speed

Torsional vibrations

None of these

Jerky starts

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

20%

15%

10%

5%

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41. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Carbon disulphide

Ammonium chloride

Freon-12

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

Sharp edged fragments

Small particles

None of these

Large particles

43. The Diesel engine works on

Carnot cycle

Diesel cycle

Rankine cycle

Otto cycle

44. 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

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

Incomplete valve closure

Fouling of spark plug by gasoline

None of these

Overheating of the engine

Automobile Engineering Practice Set-6

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