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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 valve tappet clearance is measured by

Feeler gauge

Screw pitch gauge

Engineering scale

Vernier caliper

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

82

14

175

65

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

Moves the synchronizer

Selects the synchronizer

Meshes the gears

Operates the clutch

4. The Diesel engine works on

Diesel cycle

Rankine cycle

Otto cycle

Carnot cycle

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

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

Adjust the damper spring tension

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

Of the same size as the positive terminal post

Larger than the positive terminal post

Smaller than the positive terminal post

None of these

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

Small particles

None of these

Sharp edged fragments

Large particles

8. The main function of intake manifold is that it

Reduces intake noise

Promotes the mixture of air and fuel

Cools the intake air to a suitable temperature

Distributes intake air equally to the cylinders

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

Ineffectiveness of the brakes

Localized wearing of the brake pads

Rapid wearing of the brake pads

Judder during braking

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

Parking light bulb

Head light bulb

Ignition warning bulb

Stop light bulb

Page 2 of 5

11. 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

12. The effect of having excess camber is

Excessive steering alignment torque

Too much traction

Uneven tyre wear

Hard steering

13. 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

14. Engine misfiring is likely to result from

Incorrect fuel air mixture

Vapours lock in the fuel only

Spark plug gap too wide

Spark plug gap too small

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

Continually recharges the battery

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

Supply electric power

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

Cylinder volume

None of these

Exhaust volume

Clearance volume

17. 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

18. Bead wires are made of

Steel

Aluminium

Copper

Zinc

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

Belt driven by camshaft

Belt driven by crankshaft

Chain driven by crankshaft

Belt driven by drive-shaft

20. The brake pedal during ABS operation

Is pushed upward forcefully

Pedal stroke becomes longer

All of the above

Transmits slight kickback to the driver's foot

Page 3 of 5

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

Gravity

Splashing action of the crankshaft

The pressure created by the oil pump

None of these

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

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

Maintain directional control

Prevent uneven tyre wear

Compensate for wear in the steering linkage

23. Wheel base of a vehicle is the

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

Extreme length of the vehicle

Distance between the centres of the front tyres

24. The fuel that detonates easily, is

Benzene

N-heptane

Iso-octane

Alcohol

25. Cushioning springs in clutch plate reduces

Torsional vibrations

Jerky starts

Vehicle speed

None of these

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

Journal

Crank arm

Big end

Small end

27. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Ammonium chloride

Freon-12

Carbon disulphide

28. Odometer is an instrument used for measurement of

Distance

Engine r.p.m.

Power

Fuel consumption

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

Exhaust gas volume

Air-fuel ratio

Air temperature

Air flow speed

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

10%

15%

5%

20%

Page 4 of 5

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

1-2-4-3

1-3-2-4

1-2-3-4

1-3-4-2

32. The specific gravity of petrol is about

0.85

0.95

1.25

0.75

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

2.81

1.28

1.00

1.82

34. 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.

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

Tractors

Matadors

Trucks

Passenger cars

36. Tachometer in a vehicle measures

Engine r.p.m.

Distance

Speed

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)

P.L.A.N/4

P.L.A.N

2 × P.L.A.N

P.L.A.N/2

38. The specific gravity of Diesel is about

0.65

0.75

0.85

0.95

39. The ease with which petrol vaporizes is called its

Cetane number

Octane number

Oxidation

Volatility

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

120

90

100

110

Page 5 of 5

41. Which of the following oil is more viscous?

SAE 40

SAE 70

SAE 30

SAE 80

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

All of these

Improved power output

Improved fuel efficiency

Improved emission

43. The parking brake generally acts on

Rear wheels

Propeller shaft

Front wheels

Front and rear wheels

44. The function of a governor in automobiles is to

Limit the vehicle speed

Maximise the fuel economy

Maintain constant engine speed

Limit the power

45. The Diesel engines are also known as

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

None of these

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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