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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 brake pedal during ABS operation

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

All of the above

Pedal stroke becomes longer

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

Chain driven by crankshaft

Belt driven by drive-shaft

Belt driven by crankshaft

Belt driven by camshaft

3. Cushioning springs in clutch plate reduces

None of these

Torsional vibrations

Jerky starts

Vehicle speed

4. The parking brake generally acts on

Front wheels

Rear wheels

Front and rear wheels

Propeller shaft

5. The fuel that detonates easily, is

Iso-octane

N-heptane

Benzene

Alcohol

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

Trucks

Matadors

Tractors

Passenger cars

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

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

Compensate for wear in the steering linkage

Prevent uneven tyre wear

Maintain directional control

8. The power source for a brake booster is

Hydraulic pump

Electricity

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

Exhaust manifold pressure

9. The ease with which petrol vaporizes is called its

Volatility

Octane number

Oxidation

Cetane number

10. Bead wires are made of

Copper

Aluminium

Zinc

Steel

Page 2 of 5

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

1-3-2-4

1-2-4-3

1-2-3-4

1-3-4-2

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

Ignition warning bulb

Stop light bulb

Head light bulb

Parking light bulb

13. The Diesel engine works on

Carnot cycle

Diesel cycle

Rankine cycle

Otto cycle

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

None of these

Of the same size as the positive terminal post

Smaller than the positive terminal post

Larger than the positive terminal post

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

Exhaust volume

Cylinder volume

None of these

Clearance volume

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

Improved fuel efficiency

Improved power output

All of these

Improved emission

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

2.81

1.00

1.28

1.82

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

Sharp edged fragments

None of these

Large particles

Small particles

19. Engine misfiring is likely to result from

Incorrect fuel air mixture

Vapours lock in the fuel only

Spark plug gap too small

Spark plug gap too wide

20. The valve tappet clearance is measured by

Feeler gauge

Screw pitch gauge

Engineering scale

Vernier caliper

Page 3 of 5

21. 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/2

2 × P.L.A.N

P.L.A.N/4

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

Supply electric power

Partly converts engine power into electric power

Continually recharges the battery

Converts mechanical energy into electrical energy

23. Odometer is an instrument used for measurement of

Engine r.p.m.

Distance

Power

Fuel consumption

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

100

110

90

120

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

Rotate the tyres

Adjust the damper spring tension

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

26. Tachometer in a vehicle measures

Fuel consumption

Speed

Distance

Engine r.p.m.

27. The specific gravity of Diesel is about

0.65

0.85

0.75

0.95

28. The effect of having excess camber is

Hard steering

Too much traction

Excessive steering alignment torque

Uneven tyre wear

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

Localized wearing of the brake pads

Rapid wearing of the brake pads

Judder during braking

Ineffectiveness of the brakes

30. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Freon-12

Ammonium chloride

Carbon disulphide

Page 4 of 5

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

20%

15%

5%

10%

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

None of these

Fouling of spark plug by gasoline

Overheating of the engine

Incomplete valve closure

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

Air temperature

Exhaust gas volume

Air-fuel ratio

Air flow speed

34. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

Reduces intake noise

35. The specific gravity of petrol is about

0.85

1.25

0.95

0.75

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

Splashing action of the crankshaft

Gravity

None of these

The pressure created by the oil pump

37. Which of the following oil is more viscous?

SAE 30

SAE 80

SAE 40

SAE 70

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

Operates the clutch

Selects the synchronizer

Moves the synchronizer

Meshes the gears

39. The function of a governor in automobiles is to

Maintain constant engine speed

Maximise the fuel economy

Limit the vehicle speed

Limit the power

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

The drive shafts are splined to the differential carrier.

The differential carrier houses differential pinion gears and side gears.

Page 5 of 5

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

175

14

82

65

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

Small end

Crank arm

Big end

Journal

43. 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

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

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

Poor recovery of the steering wheel after making a turn

Tendency to assume toe-out orientation

45. The Diesel engines are also known as

None of these

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

Steam engines

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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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