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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 power source for a brake booster is

Electricity

Hydraulic pump

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

Exhaust manifold pressure

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

Belt driven by drive-shaft

Belt driven by crankshaft

Chain driven by crankshaft

Belt driven by camshaft

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

Stop light bulb

Ignition warning bulb

Head light bulb

Parking light bulb

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

Tractors

Matadors

Trucks

Passenger cars

5. 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

Extreme length of the vehicle

Distance between the centres of the front tyres

6. The specific gravity of Diesel is about

0.95

0.65

0.85

0.75

7. The ease with which petrol vaporizes is called its

Octane number

Oxidation

Volatility

Cetane number

8. Which of the following oil is more viscous?

SAE 70

SAE 80

SAE 30

SAE 40

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

Compensate for wear in the steering linkage

Prevent uneven tyre wear

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

Maintain directional control

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

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

Rotate the tyres

Page 2 of 5

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

Improved fuel efficiency

Improved power output

Improved emission

All of these

12. Odometer is an instrument used for measurement of

Distance

Fuel consumption

Engine r.p.m.

Power

13. 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

14. The Diesel engines are also known as

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

None of these

Steam engines

15. 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

16. The brake pedal during ABS operation

All of the above

Is pushed upward forcefully

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

17. Which one of the following statement correctly describes the construction of a bevel gear type differential?

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

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 drive shafts are splined to the differential carrier.

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

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

Tendency to assume toe-out orientation

Poor recovery of the steering wheel after making a turn

19. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Freon-12

Ethylene glycol

Carbon disulphide

20. Tachometer in a vehicle measures

Distance

Fuel consumption

Speed

Engine r.p.m.

Page 3 of 5

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

175

65

82

14

22. 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

None of these

Gravity

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

90

110

120

100

24. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

Reduces intake noise

Cools the intake air to a suitable temperature

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

Journal

Crank arm

Small end

Big end

26. 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

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

1.00

2.81

1.28

1.82

28. 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

P.L.A.N/4

P.L.A.N/2

29. The function of a governor in automobiles is to

Maximise the fuel economy

Maintain constant engine speed

Limit the vehicle speed

Limit the power

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

Overheating of the engine

None of these

Incomplete valve closure

Fouling of spark plug by gasoline

Page 4 of 5

31. The parking brake generally acts on

Rear wheels

Front and rear wheels

Front wheels

Propeller shaft

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

Partly converts engine power into electric power

Supply electric power

Converts mechanical energy into electrical energy

Continually recharges the battery

33. The specific gravity of petrol is about

0.75

1.25

0.85

0.95

34. Engine misfiring is likely to result from

Vapours lock in the fuel only

Spark plug gap too small

Incorrect fuel air mixture

Spark plug gap too wide

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

Small particles

None of these

Large particles

Sharp edged fragments

36. 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

37. Cushioning springs in clutch plate reduces

Jerky starts

None of these

Vehicle speed

Torsional vibrations

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

Smaller than the positive terminal post

Of the same size as the positive terminal post

None of these

Larger than the positive terminal post

39. Bead wires are made of

Aluminium

Copper

Zinc

Steel

40. The Diesel engine works on

Rankine cycle

Carnot cycle

Diesel cycle

Otto cycle

Page 5 of 5

41. The fuel that detonates easily, is

Iso-octane

Benzene

N-heptane

Alcohol

42. The valve tappet clearance is measured by

Vernier caliper

Screw pitch gauge

Engineering scale

Feeler gauge

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

10%

20%

15%

5%

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

1-2-3-4

1-3-4-2

1-3-2-4

1-2-4-3

45. The effect of having excess camber is

Too much traction

Excessive steering alignment torque

Hard steering

Uneven tyre wear

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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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