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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 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.

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

1-3-4-2

1-2-3-4

1-2-4-3

1-3-2-4

3. Cushioning springs in clutch plate reduces

None of these

Torsional vibrations

Jerky starts

Vehicle speed

4. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

Reduces intake noise

5. The specific gravity of petrol is about

0.85

1.25

0.95

0.75

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

Splashing action of the crankshaft

Gravity

None of these

The pressure created by the oil pump

7. The effect of having excess camber is

Excessive steering alignment torque

Hard steering

Uneven tyre wear

Too much traction

8. 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

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

Belt driven by drive-shaft

Belt driven by camshaft

Belt driven by crankshaft

Chain driven by crankshaft

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

Operates the clutch

Selects the synchronizer

Moves the synchronizer

Meshes the gears

Page 2 of 5

11. The brake pedal during ABS operation

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

All of the above

Is pushed upward forcefully

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

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

Compensate for wear in the steering linkage

Maintain directional control

Prevent uneven tyre wear

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

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

Adjust the damper spring tension

Rotate the tyres

14. Bead wires are made of

Aluminium

Zinc

Copper

Steel

15. Engine misfiring is likely to result from

Vapours lock in the fuel only

Spark plug gap too wide

Incorrect fuel air mixture

Spark plug gap too small

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

2.81

1.00

1.82

1.28

17. The Diesel engine works on

Diesel cycle

Otto cycle

Rankine cycle

Carnot cycle

18. Which of the following oil is more viscous?

SAE 40

SAE 30

SAE 80

SAE 70

19. Tachometer in a vehicle measures

Speed

Distance

Engine r.p.m.

Fuel consumption

20. 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

Page 3 of 5

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

None of these

Overheating of the engine

Fouling of spark plug by gasoline

Incomplete valve closure

22. The ease with which petrol vaporizes is called its

Volatility

Octane number

Cetane number

Oxidation

23. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Ethylene glycol

Freon-12

Carbon disulphide

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

20%

5%

10%

15%

25. Odometer is an instrument used for measurement of

Engine r.p.m.

Distance

Fuel consumption

Power

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

100

90

110

120

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

Parking light bulb

Stop light bulb

Head light bulb

Ignition warning bulb

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

Small end

Crank arm

Big end

Journal

29. The Diesel engines are also known as

Spark ignition (S.I.) engines

None of these

Steam engines

Compression ignition (C.I.) engines

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

Improved power output

Improved fuel efficiency

Improved emission

All of these

Page 4 of 5

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

Rapid wearing of the brake pads

Judder during braking

Ineffectiveness of the brakes

Localized wearing of the brake pads

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

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

Supply electric power

Continually recharges the battery

33. 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

34. The fuel that detonates easily, is

N-heptane

Benzene

Iso-octane

Alcohol

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

Air-fuel ratio

Air flow speed

Air temperature

Exhaust gas volume

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

Tractors

Matadors

Passenger cars

Trucks

37. Wheel base of a vehicle is the

Distance between the centres of the front and rear wheels

Extreme length of the vehicle

Distance between the centres of the rear tyres

Distance between the centres of the front tyres

38. The valve tappet clearance is measured by

Screw pitch gauge

Feeler gauge

Engineering scale

Vernier caliper

39. The function of a governor in automobiles is to

Maximise the fuel economy

Maintain constant engine speed

Limit the vehicle speed

Limit the power

40. The specific gravity of Diesel is about

0.95

0.85

0.75

0.65

Page 5 of 5

41. 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

2 × P.L.A.N

P.L.A.N/2

P.L.A.N

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

Poor recovery of the steering wheel after making a turn

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

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

Sharp edged fragments

Small particles

None of these

Large particles

44. The parking brake generally acts on

Rear wheels

Front wheels

Front and rear wheels

Propeller shaft

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

65

14

82

175

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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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