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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 Diesel engines are also known as

Steam engines

None of these

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

2. 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; 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.

The drive shafts are splined to the differential carrier.

3. The fuel that detonates easily, is

Iso-octane

N-heptane

Alcohol

Benzene

4. Wheel base of a vehicle is the

Distance between the centres of the front tyres

Extreme length of the vehicle

Distance between the centres of the front and rear wheels

Distance between the centres of the rear tyres

5. The effect of having excess camber is

Uneven tyre wear

Excessive steering alignment torque

Too much traction

Hard steering

6. 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

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

82

175

14

65

8. The specific gravity of Diesel is about

0.75

0.85

0.95

0.65

9. Bead wires are made of

Copper

Zinc

Aluminium

Steel

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

All of these

Improved power output

Improved emission

Improved fuel efficiency

Page 2 of 5

11. Odometer is an instrument used for measurement of

Power

Distance

Fuel consumption

Engine r.p.m.

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

Splashing action of the crankshaft

The pressure created by the oil pump

None of these

Gravity

13. The parking brake generally acts on

Front and rear wheels

Rear wheels

Front wheels

Propeller shaft

14. Cushioning springs in clutch plate reduces

Jerky starts

Torsional vibrations

None of these

Vehicle speed

15. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Carbon disulphide

Ammonium chloride

Freon-12

16. 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

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

Big end

Crank arm

Small end

Journal

18. The ease with which petrol vaporizes is called its

Oxidation

Volatility

Octane number

Cetane number

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

1-3-4-2

1-2-4-3

1-2-3-4

1-3-2-4

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

Head light bulb

Ignition warning bulb

Stop light bulb

Parking light bulb

Page 3 of 5

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

Selects the synchronizer

Meshes the gears

Operates the clutch

Moves the synchronizer

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

15%

5%

20%

10%

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

Of the same size as the positive terminal post

None of these

Larger than the positive terminal post

Smaller than the positive terminal post

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

Fouling of spark plug by gasoline

Incomplete valve closure

Overheating of the engine

None of these

25. 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

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

Large particles

Small particles

None of these

Sharp edged fragments

27. The valve tappet clearance is measured by

Engineering scale

Screw pitch gauge

Vernier caliper

Feeler gauge

28. The function of a governor in automobiles is to

Limit the power

Limit the vehicle speed

Maximise the fuel economy

Maintain constant engine speed

29. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

Reduces intake noise

Promotes the mixture of air and fuel

30. Engine misfiring is likely to result from

Spark plug gap too wide

Vapours lock in the fuel only

Incorrect fuel air mixture

Spark plug gap too small

Page 4 of 5

31. The Diesel engine works on

Rankine cycle

Otto cycle

Diesel cycle

Carnot cycle

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

Belt driven by crankshaft

Belt driven by drive-shaft

Chain driven by crankshaft

Belt driven by camshaft

33. The power source for a brake booster is

Electricity

Hydraulic pump

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

Exhaust manifold pressure

34. The specific gravity of petrol is about

0.75

0.95

1.25

0.85

35. Which of the following oil is more viscous?

SAE 40

SAE 30

SAE 80

SAE 70

36. 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

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

Trucks

Matadors

Passenger cars

Tractors

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

Rotate the tyres

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

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

Ineffectiveness of the brakes

Judder during braking

Rapid wearing of the brake pads

Localized wearing of the brake pads

40. 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

Page 5 of 5

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

1.28

2.81

1.00

1.82

42. 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/2

P.L.A.N

2 × P.L.A.N

P.L.A.N/4

43. Tachometer in a vehicle measures

Speed

Distance

Engine r.p.m.

Fuel consumption

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

Prevent uneven tyre wear

Compensate for wear in the steering linkage

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

Maintain directional control

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

120

110

90

100

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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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