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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

Pedal stroke becomes longer

All of the above

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

Overheating of the engine

Fouling of spark plug by gasoline

None of these

Incomplete valve closure

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

100

120

110

90

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

Smaller than the positive terminal post

None of these

Of the same size as the positive terminal post

Larger than the positive terminal post

5. The specific gravity of petrol is about

0.95

0.75

1.25

0.85

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

The pressure created by the oil pump

None of these

Splashing action of the crankshaft

Gravity

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

14

82

65

175

8. The effect of having excess camber is

Uneven tyre wear

Excessive steering alignment torque

Hard steering

Too much traction

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

Chain driven by crankshaft

Belt driven by camshaft

Belt driven by drive-shaft

Belt driven by crankshaft

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

Passenger cars

Trucks

Tractors

Matadors

Page 2 of 5

11. The power source for a brake booster is

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

Hydraulic pump

Exhaust manifold pressure

Electricity

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

1-2-4-3

1-3-4-2

1-2-3-4

1-3-2-4

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

Stop light bulb

Parking light bulb

Head light bulb

Ignition warning bulb

14. The specific gravity of Diesel is about

0.95

0.75

0.65

0.85

15. The Diesel engines are also known as

None of these

Compression ignition (C.I.) engines

Steam engines

Spark ignition (S.I.) engines

16. The function of a governor in automobiles is to

Limit the power

Maximise the fuel economy

Limit the vehicle speed

Maintain constant engine speed

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

10%

15%

20%

5%

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

Small end

Journal

Big end

Crank arm

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

Sharp edged fragments

None of these

Small particles

Large particles

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

Compensate for wear in the steering linkage

Maintain directional control

Prevent uneven tyre wear

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

Page 3 of 5

21. 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

22. The fuel that detonates easily, is

Alcohol

N-heptane

Benzene

Iso-octane

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

Air temperature

Air-fuel ratio

Exhaust gas volume

Air flow speed

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

Operates the clutch

Meshes the gears

Selects the synchronizer

Moves the synchronizer

25. Which of the following oil is more viscous?

SAE 40

SAE 30

SAE 80

SAE 70

26. Tachometer in a vehicle measures

Engine r.p.m.

Fuel consumption

Speed

Distance

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

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

Continually recharges the battery

Supply electric power

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

Rapid wearing of the brake pads

Judder during braking

Localized wearing of the brake pads

Ineffectiveness of the brakes

29. 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.

30. The main function of intake manifold is that it

Reduces intake noise

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

Page 4 of 5

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

Improved emission

All of these

Improved power output

Improved fuel efficiency

32. The valve tappet clearance is measured by

Vernier caliper

Feeler gauge

Screw pitch gauge

Engineering scale

33. The Diesel engine works on

Diesel cycle

Rankine cycle

Carnot cycle

Otto cycle

34. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ethylene glycol

Freon-12

Ammonium chloride

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

None of these

Cylinder volume

Exhaust volume

Clearance volume

36. Odometer is an instrument used for measurement of

Engine r.p.m.

Distance

Power

Fuel consumption

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)

2 × P.L.A.N

P.L.A.N/2

P.L.A.N/4

P.L.A.N

38. 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

39. The parking brake generally acts on

Propeller shaft

Front and rear wheels

Front wheels

Rear wheels

40. Cushioning springs in clutch plate reduces

Torsional vibrations

None of these

Jerky starts

Vehicle speed

Page 5 of 5

41. The ease with which petrol vaporizes is called its

Cetane number

Octane number

Volatility

Oxidation

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

1.28

2.81

1.00

1.82

43. 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

44. Bead wires are made of

Zinc

Copper

Steel

Aluminium

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

Poor recovery of the steering wheel after making a turn

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

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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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