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Automobile Engineering MCQs
0

Automobile Engineering Practice Set-6

August 8, 2021

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Page 1 of 5

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

Continually recharges the battery

Supply electric power

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

2. 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.

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

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.

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

Operates the clutch

Selects the synchronizer

Meshes the gears

Moves the synchronizer

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

Chain driven by crankshaft

Belt driven by camshaft

Belt driven by drive-shaft

Belt driven by crankshaft

5. 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

6. Cushioning springs in clutch plate reduces

Vehicle speed

None of these

Torsional vibrations

Jerky starts

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

Journal

Crank arm

Big end

Small end

8. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ethylene glycol

Freon-12

Ammonium chloride

9. The specific gravity of petrol is about

1.25

0.75

0.85

0.95

10. Wheel base of a vehicle is the

Distance between the centres of the front tyres

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

Extreme length of the vehicle

Page 2 of 5

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

Exhaust gas volume

Air temperature

Air-fuel ratio

Air flow speed

12. Which of the following oil is more viscous?

SAE 40

SAE 80

SAE 70

SAE 30

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

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

Poor recovery of the steering wheel after making a turn

14. 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

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

None of these

Larger than the positive terminal post

Smaller than the positive terminal post

Of the same size as the positive terminal post

16. 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

17. Tachometer in a vehicle measures

Fuel consumption

Speed

Engine r.p.m.

Distance

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

15%

20%

5%

10%

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

The pressure created by the oil pump

None of these

Gravity

Splashing action of the crankshaft

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

Localized wearing of the brake pads

Ineffectiveness of the brakes

Rapid wearing of the brake pads

Judder during braking

Page 3 of 5

21. The Diesel engines are also known as

Steam engines

Compression ignition (C.I.) engines

None of these

Spark ignition (S.I.) engines

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

Trucks

Matadors

Tractors

Passenger cars

23. The ease with which petrol vaporizes is called its

Oxidation

Volatility

Octane number

Cetane number

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

82

65

175

14

25. The effect of having excess camber is

Hard steering

Too much traction

Excessive steering alignment torque

Uneven tyre wear

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

1-2-4-3

1-3-2-4

1-3-4-2

1-2-3-4

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

Improved emission

All of these

Improved fuel efficiency

Improved power output

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

Small particles

Sharp edged fragments

Large particles

None of these

29. The valve tappet clearance is measured by

Screw pitch gauge

Engineering scale

Vernier caliper

Feeler gauge

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

1.00

1.82

1.28

2.81

Page 4 of 5

31. 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

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

Cylinder volume

Exhaust volume

Clearance volume

None of these

33. The main function of intake manifold is that it

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

Reduces intake noise

Cools the intake air to a suitable temperature

34. The parking brake generally acts on

Rear wheels

Propeller shaft

Front and rear wheels

Front wheels

35. The function of a governor in automobiles is to

Limit the power

Limit the vehicle speed

Maximise the fuel economy

Maintain constant engine speed

36. Engine misfiring is likely to result from

Spark plug gap too small

Incorrect fuel air mixture

Vapours lock in the fuel only

Spark plug gap too wide

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. The brake pedal during ABS operation

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

All of the above

Is pushed upward forcefully

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

Ignition warning bulb

Head light bulb

Stop light bulb

Parking light bulb

40. Bead wires are made of

Zinc

Aluminium

Steel

Copper

Page 5 of 5

41. The Diesel engine works on

Carnot cycle

Diesel cycle

Rankine cycle

Otto cycle

42. The fuel that detonates easily, is

N-heptane

Iso-octane

Alcohol

Benzene

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

120

90

110

100

44. Odometer is an instrument used for measurement of

Fuel consumption

Distance

Engine r.p.m.

Power

45. The specific gravity of Diesel is about

0.65

0.75

0.95

0.85

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A Demrot is the founder of VideRime Online Learning, a leading engineering website. He did his BE Civil and M.Tech Structure from RGPV University, Bhopal and has been working as an Assistant Professor in a reputed college.

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