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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 specific gravity of petrol is about

0.85

0.75

1.25

0.95

2. 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 differential carrier houses differential pinion gears and side gears.

The drive shafts are splined to the differential carrier.

3. 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

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

Ignition warning bulb

Parking light bulb

Head light bulb

Stop light bulb

5. Cushioning springs in clutch plate reduces

Torsional vibrations

Vehicle speed

None of these

Jerky starts

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

Maintain directional control

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

Compensate for wear in the steering linkage

Prevent uneven tyre wear

7. The function of a governor in automobiles is to

Maintain constant engine speed

Limit the power

Maximise the fuel economy

Limit the vehicle speed

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

Cylinder volume

Exhaust volume

Clearance volume

None of these

9. 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

2 × P.L.A.N

P.L.A.N

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

1.00

1.82

2.81

1.28

Page 2 of 5

11. 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

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

Splashing action of the crankshaft

None of these

Gravity

The pressure created by the oil pump

13. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Distributes intake air equally to the cylinders

Reduces intake noise

Promotes the mixture of air and fuel

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

Small end

Crank arm

Journal

Big end

15. The Diesel engine works on

Otto cycle

Rankine cycle

Diesel cycle

Carnot cycle

16. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Carbon disulphide

Ammonium chloride

Freon-12

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

Larger than the positive terminal post

Smaller than the positive terminal post

None of these

Of the same size as the positive terminal post

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

Belt driven by crankshaft

Belt driven by drive-shaft

Belt driven by camshaft

Chain driven by crankshaft

19. The effect of having excess camber is

Too much traction

Hard steering

Uneven tyre wear

Excessive steering alignment torque

20. The valve tappet clearance is measured by

Screw pitch gauge

Vernier caliper

Engineering scale

Feeler gauge

Page 3 of 5

21. Tachometer in a vehicle measures

Engine r.p.m.

Distance

Fuel consumption

Speed

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

None of these

Large particles

Sharp edged fragments

Small particles

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

Passenger cars

Matadors

Tractors

Trucks

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

120

90

110

100

25. 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

26. The Diesel engines are also known as

None of these

Steam engines

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

27. Engine misfiring is likely to result from

Spark plug gap too small

Incorrect fuel air mixture

Spark plug gap too wide

Vapours lock in the fuel only

28. The parking brake generally acts on

Rear wheels

Front wheels

Propeller shaft

Front and rear wheels

29. The power source for a brake booster is

Electricity

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

Exhaust manifold pressure

Hydraulic pump

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

10%

20%

5%

15%

Page 4 of 5

31. 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

32. The fuel that detonates easily, is

Benzene

N-heptane

Alcohol

Iso-octane

33. The ease with which petrol vaporizes is called its

Oxidation

Cetane number

Volatility

Octane number

34. Which of the following oil is more viscous?

SAE 70

SAE 80

SAE 30

SAE 40

35. 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

Distance between the centres of the rear tyres

Extreme length of the vehicle

36. The specific gravity of Diesel is about

0.75

0.95

0.85

0.65

37. Odometer is an instrument used for measurement of

Distance

Fuel consumption

Engine r.p.m.

Power

38. Bead wires are made of

Steel

Zinc

Aluminium

Copper

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

Attach appropriate weights to the wheel at appropriate positions

Adjust the damper spring tension

Rotate the tyres

Adjust the tyre pressure

40. 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

Page 5 of 5

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

The vehicle to pull to the side of lesser inclination

Poor recovery of the steering wheel after making a turn

Generation of a braking effect at tight corners

Tendency to assume toe-out orientation

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

Improved fuel efficiency

Improved power output

Improved emission

All of these

43. 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

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

14

65

175

82

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

Overheating of the engine

Fouling of spark plug by gasoline

Incomplete valve closure

None of these

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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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