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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

Supply electric power

Continually recharges the battery

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

2. 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.

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.

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

Tendency to assume toe-out orientation

Poor recovery of the steering wheel after making a turn

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

4. 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

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

None of these

Smaller than the positive terminal post

Of the same size as the positive terminal post

Larger than the positive terminal post

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

None of these

Large particles

Sharp edged fragments

Small particles

7. The valve tappet clearance is measured by

Engineering scale

Vernier caliper

Screw pitch gauge

Feeler gauge

8. The function of a governor in automobiles is to

Limit the power

Maintain constant engine speed

Limit the vehicle speed

Maximise the fuel economy

9. Tachometer in a vehicle measures

Distance

Fuel consumption

Speed

Engine r.p.m.

10. The commonly used antifreeze solution in automobiles is

Freon-12

Ammonium chloride

Carbon disulphide

Ethylene glycol

Page 2 of 5

11. The specific gravity of Diesel is about

0.75

0.95

0.85

0.65

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

Cylinder volume

None of these

Exhaust volume

Clearance volume

13. Odometer is an instrument used for measurement of

Distance

Power

Engine r.p.m.

Fuel consumption

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

1.82

1.28

2.81

1.00

15. Engine misfiring is likely to result from

Spark plug gap too wide

Vapours lock in the fuel only

Spark plug gap too small

Incorrect fuel air mixture

16. 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

17. Wheel base of a vehicle is the

Distance between the centres of the front tyres

Extreme length of the vehicle

Distance between the centres of the front and rear wheels

Distance between the centres of the rear tyres

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

None of these

Fouling of spark plug by gasoline

Incomplete valve closure

Overheating of the engine

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

Rotate the tyres

Adjust the tyre pressure

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

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

Belt driven by drive-shaft

Belt driven by camshaft

Chain driven by crankshaft

Belt driven by crankshaft

Page 3 of 5

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

Passenger cars

Trucks

Tractors

Matadors

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

120

110

90

100

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

Prevent uneven tyre wear

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

Compensate for wear in the steering linkage

Maintain directional control

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

82

14

175

65

25. The brake pedal during ABS operation

Is pushed upward forcefully

All of the above

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

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

Journal

Small end

Big end

Crank arm

27. The Diesel engines are also known as

Steam engines

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

None of these

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

Exhaust gas volume

Air-fuel ratio

Air flow speed

Air temperature

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

Operates the clutch

Moves the synchronizer

Meshes the gears

Selects the synchronizer

30. The parking brake generally acts on

Front wheels

Rear wheels

Front and rear wheels

Propeller shaft

Page 4 of 5

31. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

Cools the intake air to a suitable temperature

Reduces intake noise

32. The ease with which petrol vaporizes is called its

Cetane number

Volatility

Oxidation

Octane number

33. 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

34. Cushioning springs in clutch plate reduces

None of these

Vehicle speed

Torsional vibrations

Jerky starts

35. The specific gravity of petrol is about

0.75

0.95

0.85

1.25

36. The fuel that detonates easily, is

N-heptane

Alcohol

Benzene

Iso-octane

37. The Diesel engine works on

Rankine cycle

Otto cycle

Diesel cycle

Carnot cycle

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

Judder during braking

Localized wearing of the brake pads

Rapid wearing of the brake pads

Ineffectiveness of the brakes

39. Which of the following oil is more viscous?

SAE 80

SAE 70

SAE 30

SAE 40

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

1-3-4-2

1-2-3-4

1-3-2-4

1-2-4-3

Page 5 of 5

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

20%

15%

10%

5%

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

Improved emission

Improved fuel efficiency

All of these

Improved power output

43. Bead wires are made of

Aluminium

Steel

Zinc

Copper

44. The power source for a brake booster is

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

Hydraulic pump

Exhaust manifold pressure

Electricity

45. The effect of having excess camber is

Excessive steering alignment torque

Too much traction

Uneven tyre wear

Hard steering

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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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