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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 parking brake generally acts on

Front wheels

Rear wheels

Propeller shaft

Front and rear wheels

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

Fouling of spark plug by gasoline

Overheating of the engine

Incomplete valve closure

None of these

3. The valve tappet clearance is measured by

Engineering scale

Feeler gauge

Vernier caliper

Screw pitch gauge

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

Belt driven by crankshaft

Belt driven by camshaft

Belt driven by drive-shaft

Chain driven by crankshaft

5. The Diesel engines are also known as

Spark ignition (S.I.) engines

Steam engines

Compression ignition (C.I.) engines

None of these

6. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

Reduces intake noise

Distributes intake air equally to the cylinders

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

Prevent uneven tyre wear

Compensate for wear in the steering linkage

Maintain directional control

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

8. 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.

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

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

100

120

110

90

10. 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

Page 2 of 5

11. The power source for a brake booster is

Hydraulic pump

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

Electricity

Exhaust manifold pressure

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

Localized wearing of the brake pads

Judder during braking

Rapid wearing of the brake pads

Ineffectiveness of the brakes

13. The fuel that detonates easily, is

Benzene

Iso-octane

Alcohol

N-heptane

14. The specific gravity of petrol is about

1.25

0.85

0.95

0.75

15. The Diesel engine works on

Diesel cycle

Rankine cycle

Otto cycle

Carnot cycle

16. Cushioning springs in clutch plate reduces

Torsional vibrations

None of these

Vehicle speed

Jerky starts

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

Converts mechanical energy into electrical energy

Continually recharges the battery

Supply electric power

Partly converts engine power into electric power

18. 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

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

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

Stop light bulb

Ignition warning bulb

Parking light bulb

Head light bulb

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

Sharp edged fragments

Small particles

Large particles

None of these

Page 3 of 5

21. The ease with which petrol vaporizes is called its

Oxidation

Cetane number

Octane number

Volatility

22. 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/2

P.L.A.N

P.L.A.N/4

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

20%

15%

10%

5%

24. 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

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

Meshes the gears

Moves the synchronizer

Operates the clutch

Selects the synchronizer

26. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ammonium chloride

Ethylene glycol

Freon-12

27. Bead wires are made of

Copper

Aluminium

Steel

Zinc

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

Improved emission

Improved fuel efficiency

All of these

Improved power output

29. The function of a governor in automobiles is to

Limit the power

Maximise the fuel economy

Maintain constant engine speed

Limit the vehicle speed

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

Adjust the damper spring tension

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

Page 4 of 5

31. 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

32. Odometer is an instrument used for measurement of

Power

Fuel consumption

Engine r.p.m.

Distance

33. Engine misfiring is likely to result from

Vapours lock in the fuel only

Spark plug gap too small

Spark plug gap too wide

Incorrect fuel air mixture

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

1.28

1.00

2.81

1.82

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

Tractors

Passenger cars

Trucks

Matadors

36. Which of the following oil is more viscous?

SAE 70

SAE 30

SAE 80

SAE 40

37. 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

Smaller than the positive terminal post

None of these

38. The brake pedal during ABS operation

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

Is pushed upward forcefully

All of the above

39. Tachometer in a vehicle measures

Distance

Engine r.p.m.

Speed

Fuel consumption

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

Journal

Small end

Big end

Crank arm

Page 5 of 5

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

None of these

Splashing action of the crankshaft

The pressure created by the oil pump

Gravity

42. The specific gravity of Diesel is about

0.65

0.75

0.85

0.95

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

Cylinder volume

Exhaust volume

None of these

Clearance volume

44. The effect of having excess camber is

Uneven tyre wear

Too much traction

Excessive steering alignment torque

Hard steering

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

175

14

65

82

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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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