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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 effect of having excess camber is

Too much traction

Uneven tyre wear

Excessive steering alignment torque

Hard steering

2. 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

P.L.A.N/4

2 × P.L.A.N

P.L.A.N/2

3. Bead wires are made of

Aluminium

Copper

Zinc

Steel

4. Which of the following oil is more viscous?

SAE 30

SAE 80

SAE 70

SAE 40

5. The Diesel engine works on

Carnot cycle

Otto cycle

Rankine cycle

Diesel cycle

6. The specific gravity of petrol is about

0.85

0.75

1.25

0.95

7. Engine misfiring is likely to result from

Incorrect fuel air mixture

Spark plug gap too small

Vapours lock in the fuel only

Spark plug gap too wide

8. The power source for a brake booster is

Exhaust manifold pressure

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

Hydraulic pump

Electricity

9. 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

10. The specific gravity of Diesel is about

0.85

0.65

0.75

0.95

Page 2 of 5

11. Odometer is an instrument used for measurement of

Distance

Engine r.p.m.

Fuel consumption

Power

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

Judder during braking

Ineffectiveness of the brakes

Rapid wearing of the brake pads

Localized wearing of the brake pads

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

Small end

Crank arm

Journal

Big end

14. 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 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 drive shafts are splined to the differential carrier.

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

Clearance volume

Cylinder volume

None of these

Exhaust volume

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

Passenger cars

Tractors

Trucks

Matadors

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

Adjust the damper spring tension

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

18. The fuel that detonates easily, is

Iso-octane

Alcohol

N-heptane

Benzene

19. Cushioning springs in clutch plate reduces

Torsional vibrations

Vehicle speed

None of these

Jerky starts

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

1-2-3-4

1-3-4-2

1-2-4-3

1-3-2-4

Page 3 of 5

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

20%

15%

5%

10%

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

Large particles

Sharp edged fragments

None of these

Small particles

23. 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

Distance between the centres of the front tyres

Extreme length of the vehicle

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

Prevent uneven tyre wear

Maintain directional control

Compensate for wear in the steering linkage

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

25. The commonly used antifreeze solution in automobiles is

Freon-12

Ethylene glycol

Carbon disulphide

Ammonium chloride

26. The Diesel engines are also known as

None of these

Compression ignition (C.I.) engines

Steam engines

Spark ignition (S.I.) engines

27. The function of a governor in automobiles is to

Limit the power

Maintain constant engine speed

Maximise the fuel economy

Limit the vehicle speed

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

82

65

14

175

29. The ease with which petrol vaporizes is called its

Oxidation

Cetane number

Octane number

Volatility

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

None of these

Fouling of spark plug by gasoline

Overheating of the engine

Incomplete valve closure

Page 4 of 5

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

Operates the clutch

Selects the synchronizer

Meshes the gears

Moves the synchronizer

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

Gravity

The pressure created by the oil pump

None of these

Splashing action of the crankshaft

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

All of these

Improved emission

Improved fuel efficiency

Improved power output

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

2.81

1.28

1.82

1.00

35. 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

36. 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

37. The brake pedal during ABS operation

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

All of the above

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

110

120

100

90

39. Tachometer in a vehicle measures

Distance

Fuel consumption

Speed

Engine r.p.m.

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

Chain driven by crankshaft

Belt driven by crankshaft

Belt driven by camshaft

Belt driven by drive-shaft

Page 5 of 5

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

Air temperature

Air-fuel ratio

Air flow speed

Exhaust gas volume

42. The valve tappet clearance is measured by

Engineering scale

Feeler gauge

Vernier caliper

Screw pitch gauge

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

Parking light bulb

Head light bulb

Stop light bulb

Ignition warning bulb

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

Poor recovery of the steering wheel after making a turn

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

Tendency to assume toe-out orientation

45. The parking brake generally acts on

Front and rear wheels

Propeller shaft

Rear wheels

Front wheels

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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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