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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. 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.

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

14

65

175

82

3. The specific gravity of Diesel is about

0.85

0.65

0.95

0.75

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

Belt driven by crankshaft

Chain driven by crankshaft

Belt driven by drive-shaft

Belt driven by camshaft

5. The Diesel engine works on

Otto cycle

Carnot cycle

Diesel cycle

Rankine cycle

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

Exhaust gas volume

Air flow speed

Air-fuel ratio

Air temperature

7. 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

8. The parking brake generally acts on

Front wheels

Rear wheels

Front and rear wheels

Propeller shaft

9. The effect of having excess camber is

Excessive steering alignment torque

Hard steering

Too much traction

Uneven tyre wear

10. The ease with which petrol vaporizes is called its

Volatility

Octane number

Cetane number

Oxidation

Page 2 of 5

11. Tachometer in a vehicle measures

Distance

Speed

Engine r.p.m.

Fuel consumption

12. 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

Prevent uneven tyre wear

Compensate for wear in the steering linkage

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

Supply electric power

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

Continually recharges the battery

14. 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/4

P.L.A.N

2 × P.L.A.N

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

Ineffectiveness of the brakes

Rapid wearing of the brake pads

Judder during braking

Localized wearing of the brake pads

16. Cushioning springs in clutch plate reduces

Torsional vibrations

Jerky starts

Vehicle speed

None of these

17. The power source for a brake booster is

Electricity

Hydraulic pump

Exhaust manifold pressure

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

18. The function of a governor in automobiles is to

Maximise the fuel economy

Limit the power

Limit the vehicle speed

Maintain constant engine speed

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

90

120

110

100

20. 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

Page 3 of 5

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

Splashing action of the crankshaft

Gravity

The pressure created by the oil pump

None of these

22. The valve tappet clearance is measured by

Feeler gauge

Screw pitch gauge

Vernier caliper

Engineering scale

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

1.00

2.81

1.28

1.82

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

10%

5%

15%

20%

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

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

Poor recovery of the steering wheel after making a turn

26. The specific gravity of petrol is about

0.75

0.85

0.95

1.25

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

Clearance volume

None of these

Exhaust volume

Cylinder volume

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

Rotate the tyres

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

Adjust the damper spring tension

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

Small end

Journal

Big end

Crank arm

30. 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

Extreme length of the vehicle

Distance between the centres of the front tyres

Page 4 of 5

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

Moves the synchronizer

Meshes the gears

Selects the synchronizer

Operates the clutch

32. Bead wires are made of

Copper

Zinc

Steel

Aluminium

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

Larger than the positive terminal post

Of the same size as the positive terminal post

None of these

Smaller than the positive terminal post

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

None of these

Fouling of spark plug by gasoline

Incomplete valve closure

Overheating of the engine

35. Which of the following oil is more viscous?

SAE 70

SAE 30

SAE 40

SAE 80

36. 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

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

None of these

Large particles

Small particles

Sharp edged fragments

38. The fuel that detonates easily, is

Iso-octane

N-heptane

Alcohol

Benzene

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

Improved fuel efficiency

All of these

Improved emission

Improved power output

40. Odometer is an instrument used for measurement of

Distance

Power

Engine r.p.m.

Fuel consumption

Page 5 of 5

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

Tractors

Matadors

Passenger cars

Trucks

42. The main function of intake manifold is that it

Reduces intake noise

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

43. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Freon-12

Carbon disulphide

Ethylene glycol

44. The Diesel engines are also known as

None of these

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

Steam engines

45. 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

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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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