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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

Converts mechanical energy into electrical energy

Continually recharges the battery

Supply electric power

Partly converts engine power into electric power

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

Belt driven by camshaft

Belt driven by drive-shaft

Belt driven by crankshaft

Chain driven by crankshaft

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

Smaller than the positive terminal post

Larger than the positive terminal post

Of the same size as the positive terminal post

None of these

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

The drive shafts are splined to the differential carrier.

The differential carrier houses differential pinion gears and side gears.

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

2.81

1.28

1.00

1.82

6. 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

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

The pressure created by the oil pump

Splashing action of the crankshaft

Gravity

None of these

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

Sharp edged fragments

None of these

Large particles

Small particles

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

Cylinder volume

Exhaust volume

None of these

Clearance volume

10. The brake pedal during ABS operation

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

Is pushed upward forcefully

All of the above

Page 2 of 5

11. Bead wires are made of

Zinc

Steel

Aluminium

Copper

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

110

90

120

100

13. 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

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

Compensate for wear in the steering linkage

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

Maintain directional control

Prevent uneven tyre wear

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

Exhaust gas volume

Air flow speed

Air temperature

Air-fuel ratio

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

Localized wearing of the brake pads

Judder during braking

Ineffectiveness of the brakes

Rapid wearing of the brake pads

17. Cushioning springs in clutch plate reduces

None of these

Vehicle speed

Torsional vibrations

Jerky starts

18. The specific gravity of Diesel is about

0.85

0.65

0.75

0.95

19. Odometer is an instrument used for measurement of

Fuel consumption

Power

Distance

Engine r.p.m.

20. The function of a governor in automobiles is to

Maximise the fuel economy

Limit the vehicle speed

Limit the power

Maintain constant engine speed

Page 3 of 5

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

Meshes the gears

Moves the synchronizer

Operates the clutch

Selects the synchronizer

22. Tachometer in a vehicle measures

Distance

Speed

Fuel consumption

Engine r.p.m.

23. The main function of intake manifold is that it

Promotes the mixture of air and fuel

Reduces intake noise

Cools the intake air to a suitable temperature

Distributes intake air equally to the cylinders

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

Improved power output

All of these

Improved fuel efficiency

Improved emission

25. The Diesel engine works on

Carnot cycle

Rankine cycle

Diesel cycle

Otto cycle

26. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Freon-12

Ethylene glycol

Ammonium chloride

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

Tractors

Matadors

Passenger cars

Trucks

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

Head light bulb

Ignition warning bulb

Stop light bulb

Parking light bulb

29. The valve tappet clearance is measured by

Feeler gauge

Vernier caliper

Engineering scale

Screw pitch gauge

30. 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

Page 4 of 5

31. The ease with which petrol vaporizes is called its

Oxidation

Octane number

Volatility

Cetane number

32. The parking brake generally acts on

Front wheels

Front and rear wheels

Rear wheels

Propeller shaft

33. The effect of having excess camber is

Too much traction

Excessive steering alignment torque

Uneven tyre wear

Hard steering

34. The Diesel engines are also known as

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

None of these

Steam engines

35. 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

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

1-2-4-3

1-2-3-4

1-3-4-2

1-3-2-4

37. The specific gravity of petrol is about

0.85

1.25

0.95

0.75

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

None of these

Incomplete valve closure

Fouling of spark plug by gasoline

Overheating of the engine

39. 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

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

40. The power source for a brake booster is

Hydraulic pump

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

Electricity

Exhaust manifold pressure

Page 5 of 5

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

175

14

65

82

42. The fuel that detonates easily, is

Iso-octane

Benzene

N-heptane

Alcohol

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

Journal

Small end

Crank arm

Big end

44. Which of the following oil is more viscous?

SAE 30

SAE 40

SAE 70

SAE 80

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

20%

5%

10%

15%

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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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