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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

Hydraulic pump

Exhaust manifold pressure

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

Electricity

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

Belt driven by camshaft

Chain driven by crankshaft

Belt driven by crankshaft

Belt driven by drive-shaft

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

None of these

Larger than the positive terminal post

Of the same size as the positive terminal post

Smaller than the positive terminal post

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

20%

5%

10%

15%

5. 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

6. The specific gravity of petrol is about

0.75

0.85

0.95

1.25

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

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

Poor recovery of the steering wheel after making a turn

8. The Diesel engine works on

Diesel cycle

Rankine cycle

Carnot cycle

Otto cycle

9. Bead wires are made of

Zinc

Copper

Steel

Aluminium

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

1.82

1.00

2.81

1.28

Page 2 of 5

11. Cushioning springs in clutch plate reduces

Vehicle speed

Torsional vibrations

None of these

Jerky starts

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

100

90

120

110

13. The ease with which petrol vaporizes is called its

Cetane number

Volatility

Oxidation

Octane number

14. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ethylene glycol

Ammonium chloride

Freon-12

15. 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

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

Continually recharges the battery

Partly converts engine power into electric power

Supply electric power

Converts mechanical energy into electrical energy

17. Engine misfiring is likely to result from

Vapours lock in the fuel only

Incorrect fuel air mixture

Spark plug gap too small

Spark plug gap too wide

18. Wheel base of a vehicle is the

Distance between the centres of the front tyres

Distance between the centres of the front and rear wheels

Extreme length of the vehicle

Distance between the centres of the rear tyres

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

Incomplete valve closure

Fouling of spark plug by gasoline

None of these

Overheating of the engine

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

Parking light bulb

Stop light bulb

Head light bulb

Ignition warning bulb

Page 3 of 5

21. The valve tappet clearance is measured by

Engineering scale

Feeler gauge

Vernier caliper

Screw pitch gauge

22. The parking brake generally acts on

Propeller shaft

Rear wheels

Front and rear wheels

Front wheels

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

Crank arm

Big end

Small end

Journal

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

None of these

Cylinder volume

Clearance volume

Exhaust volume

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

Compensate for wear in the steering linkage

Maintain directional control

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

Prevent uneven tyre wear

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

Improved emission

All of these

Improved fuel efficiency

Improved power output

27. 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

28. The function of a governor in automobiles is to

Maintain constant engine speed

Limit the vehicle speed

Limit the power

Maximise the fuel economy

29. The specific gravity of Diesel is about

0.65

0.75

0.85

0.95

30. The effect of having excess camber is

Uneven tyre wear

Excessive steering alignment torque

Hard steering

Too much traction

Page 4 of 5

31. The Diesel engines are also known as

Steam engines

None of these

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

32. Odometer is an instrument used for measurement of

Power

Distance

Engine r.p.m.

Fuel consumption

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

1-3-4-2

1-2-3-4

1-2-4-3

1-3-2-4

34. The fuel that detonates easily, is

Alcohol

N-heptane

Iso-octane

Benzene

35. 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.

36. The brake pedal during ABS operation

All of the above

Transmits slight kickback to the driver's foot

Is pushed upward forcefully

Pedal stroke becomes longer

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

175

65

82

14

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

Ineffectiveness of the brakes

Judder during braking

Localized wearing of the brake pads

Rapid wearing of the brake pads

39. Which of the following oil is more viscous?

SAE 80

SAE 70

SAE 40

SAE 30

40. 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/2

P.L.A.N/4

Page 5 of 5

41. Tachometer in a vehicle measures

Distance

Speed

Engine r.p.m.

Fuel consumption

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

Small particles

Large particles

Sharp edged fragments

None of these

43. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Reduces intake noise

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

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

Matadors

Tractors

Trucks

Passenger cars

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

The pressure created by the oil pump

Gravity

Splashing action of the crankshaft

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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