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

Moves the synchronizer

Meshes the gears

Operates the clutch

Selects the synchronizer

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

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

Adjust the damper spring tension

3. 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

4. Cushioning springs in clutch plate reduces

Torsional vibrations

Jerky starts

None of these

Vehicle speed

5. 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

6. The power source for a brake booster is

Exhaust manifold pressure

Hydraulic pump

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

Electricity

7. Tachometer in a vehicle measures

Distance

Speed

Engine r.p.m.

Fuel consumption

8. The parking brake generally acts on

Front wheels

Propeller shaft

Rear wheels

Front and rear wheels

9. Bead wires are made of

Copper

Steel

Aluminium

Zinc

10. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Ethylene glycol

Freon-12

Carbon disulphide

Page 2 of 5

11. The main function of intake manifold is that it

Promotes the mixture of air and fuel

Cools the intake air to a suitable temperature

Distributes intake air equally to the cylinders

Reduces intake noise

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

82

65

14

175

13. Engine misfiring is likely to result from

Spark plug gap too wide

Incorrect fuel air mixture

Vapours lock in the fuel only

Spark plug gap too small

14. The effect of having excess camber is

Too much traction

Uneven tyre wear

Excessive steering alignment torque

Hard steering

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

Improved emission

Improved power output

Improved fuel efficiency

All of these

16. The specific gravity of Diesel is about

0.85

0.65

0.75

0.95

17. The Diesel engine works on

Rankine cycle

Carnot cycle

Diesel cycle

Otto cycle

18. 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

19. The Diesel engines are also known as

Compression ignition (C.I.) engines

None of these

Spark ignition (S.I.) engines

Steam engines

20. The ease with which petrol vaporizes is called its

Oxidation

Volatility

Cetane number

Octane number

Page 3 of 5

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

Clearance volume

Exhaust volume

None of these

Cylinder volume

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

Big end

Crank arm

Journal

Small end

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

Parking light bulb

Stop light bulb

Ignition warning bulb

Head light bulb

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

Converts mechanical energy into electrical energy

Supply electric power

Partly converts engine power into electric power

Continually recharges the battery

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

1-3-2-4

1-3-4-2

1-2-4-3

1-2-3-4

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

Tractors

Passenger cars

Trucks

Matadors

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

15%

20%

5%

10%

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

Poor recovery of the steering wheel after making a turn

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

29. 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; each pinion gear meshes with a different side gear.

The differential carrier houses differential pinion gears and side gears.

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

30. Odometer is an instrument used for measurement of

Power

Fuel consumption

Engine r.p.m.

Distance

Page 4 of 5

31. The function of a governor in automobiles is to

Maintain constant engine speed

Limit the power

Limit the vehicle speed

Maximise the fuel economy

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

Judder during braking

Ineffectiveness of the brakes

Localized wearing of the brake pads

Rapid wearing of the brake pads

33. Which of the following oil is more viscous?

SAE 70

SAE 30

SAE 80

SAE 40

34. The valve tappet clearance is measured by

Feeler gauge

Vernier caliper

Engineering scale

Screw pitch gauge

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

120

90

100

110

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

Splashing action of the crankshaft

None of these

Gravity

The pressure created by the oil pump

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)

P.L.A.N/4

P.L.A.N

P.L.A.N/2

2 × P.L.A.N

38. The brake pedal during ABS operation

All of the above

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

Is pushed upward forcefully

39. Wheel base of a vehicle is the

Distance between the centres of the front and rear wheels

Distance between the centres of the rear tyres

Distance between the centres of the front tyres

Extreme length of the vehicle

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

1.28

1.82

2.81

1.00

Page 5 of 5

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

Air flow speed

Air-fuel ratio

Exhaust gas volume

Air temperature

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

Large particles

Small particles

Sharp edged fragments

None of these

43. The fuel that detonates easily, is

Alcohol

Iso-octane

Benzene

N-heptane

44. The specific gravity of petrol is about

0.95

0.85

0.75

1.25

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

Overheating of the engine

Incomplete valve closure

Fouling of spark plug by gasoline

None of these

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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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