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

Sharp edged fragments

Large particles

None of these

Small particles

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

Larger than the positive terminal post

Of the same size as the positive terminal post

None of these

Smaller than the positive terminal post

3. The effect of having excess camber is

Too much traction

Uneven tyre wear

Hard steering

Excessive steering alignment torque

4. 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

5. 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 differential carrier houses differential pinion gears and side gears.

The drive shafts are splined to the differential carrier.

6. Bead wires are made of

Zinc

Aluminium

Copper

Steel

7. The specific gravity of Diesel is about

0.85

0.95

0.75

0.65

8. The valve tappet clearance is measured by

Vernier caliper

Feeler gauge

Screw pitch gauge

Engineering scale

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

Maintain directional control

Compensate for wear in the steering linkage

Prevent uneven tyre wear

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

10. Cushioning springs in clutch plate reduces

Torsional vibrations

Vehicle speed

Jerky starts

None of these

Page 2 of 5

11. The parking brake generally acts on

Rear wheels

Front wheels

Front and rear wheels

Propeller shaft

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

Ineffectiveness of the brakes

Rapid wearing of the brake pads

Localized wearing of the brake pads

Judder during braking

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

Improved power output

Improved fuel efficiency

All of these

Improved emission

14. 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

15. The main function of intake manifold is that it

Reduces intake noise

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

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

Adjust the damper spring tension

Adjust the tyre pressure

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

17. The Diesel engines are also known as

Compression ignition (C.I.) engines

Steam engines

Spark ignition (S.I.) engines

None of these

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

1.82

1.28

1.00

2.81

19. Odometer is an instrument used for measurement of

Power

Engine r.p.m.

Distance

Fuel consumption

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

82

14

65

175

Page 3 of 5

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

Poor recovery of the steering wheel after making a turn

Generation of a braking effect at tight corners

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

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

Tractors

Matadors

Passenger cars

Trucks

23. Tachometer in a vehicle measures

Engine r.p.m.

Speed

Fuel consumption

Distance

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

Crank arm

Big end

Journal

Small end

25. 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/4

2 × P.L.A.N

P.L.A.N/2

26. The specific gravity of petrol is about

0.75

0.85

0.95

1.25

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

Overheating of the engine

Incomplete valve closure

None of these

Fouling of spark plug by gasoline

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

1-2-4-3

1-3-4-2

1-3-2-4

1-2-3-4

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

Belt driven by crankshaft

Belt driven by drive-shaft

Belt driven by camshaft

Chain driven by crankshaft

Page 4 of 5

31. 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

32. Engine misfiring is likely to result from

Spark plug gap too small

Spark plug gap too wide

Incorrect fuel air mixture

Vapours lock in the fuel only

33. The function of a governor in automobiles is to

Limit the vehicle speed

Limit the power

Maximise the fuel economy

Maintain constant engine speed

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

Gravity

None of these

Splashing action of the crankshaft

The pressure created by the oil pump

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

5%

10%

15%

20%

36. 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

37. The Diesel engine works on

Otto cycle

Rankine cycle

Carnot cycle

Diesel cycle

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

Exhaust volume

Clearance volume

None of these

Cylinder volume

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

Selects the synchronizer

Meshes the gears

Moves the synchronizer

Operates the clutch

40. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Carbon disulphide

Freon-12

Ammonium chloride

Page 5 of 5

41. The fuel that detonates easily, is

N-heptane

Iso-octane

Benzene

Alcohol

42. The ease with which petrol vaporizes is called its

Cetane number

Oxidation

Octane number

Volatility

43. The brake pedal during ABS operation

Pedal stroke becomes longer

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

All of the above

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

100

120

110

90

45. Which of the following oil is more viscous?

SAE 70

SAE 30

SAE 40

SAE 80

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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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