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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. Cushioning springs in clutch plate reduces

Vehicle speed

Jerky starts

Torsional vibrations

None of these

2. 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

3. Engine misfiring is likely to result from

Spark plug gap too small

Vapours lock in the fuel only

Incorrect fuel air mixture

Spark plug gap too wide

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

1.28

1.00

2.81

1.82

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

Small end

Journal

Big end

Crank arm

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

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

Adjust the damper spring tension

Rotate the tyres

7. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Reduces intake noise

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

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

Overheating of the engine

Incomplete valve closure

Fouling of spark plug by gasoline

None of these

9. The brake pedal during ABS operation

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

Is pushed upward forcefully

All of the above

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

Of the same size as the positive terminal post

Smaller than the positive terminal post

None of these

Larger than the positive terminal post

Page 2 of 5

11. The specific gravity of Diesel is about

0.75

0.95

0.65

0.85

12. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ethylene glycol

Ammonium chloride

Freon-12

13. The fuel that detonates easily, is

Iso-octane

Benzene

N-heptane

Alcohol

14. 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

Judder during braking

Rapid wearing of the brake pads

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

Converts mechanical energy into electrical energy

Supply electric power

Continually recharges the battery

Partly converts engine power into electric power

16. The effect of having excess camber is

Too much traction

Excessive steering alignment torque

Uneven tyre wear

Hard steering

17. The power source for a brake booster is

Hydraulic pump

Exhaust manifold pressure

Electricity

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

18. 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 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.

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

Belt driven by drive-shaft

Chain driven by crankshaft

Belt driven by camshaft

Belt driven by crankshaft

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

The pressure created by the oil pump

None of these

Gravity

Splashing action of the crankshaft

Page 3 of 5

21. The Diesel engines are also known as

None of these

Compression ignition (C.I.) engines

Steam engines

Spark ignition (S.I.) engines

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

1-3-2-4

1-3-4-2

1-2-3-4

1-2-4-3

23. Odometer is an instrument used for measurement of

Engine r.p.m.

Fuel consumption

Power

Distance

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

Stop light bulb

Ignition warning bulb

Head light bulb

Parking light bulb

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

175

82

65

14

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

120

90

110

100

27. 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

28. The parking brake generally acts on

Front and rear wheels

Rear wheels

Propeller shaft

Front wheels

29. 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

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

20%

5%

10%

15%

Page 4 of 5

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

Improved emission

Improved power output

All of these

Improved fuel efficiency

32. Which of the following oil is more viscous?

SAE 80

SAE 40

SAE 30

SAE 70

33. Bead wires are made of

Aluminium

Copper

Steel

Zinc

34. 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

2 × P.L.A.N

P.L.A.N

P.L.A.N/4

35. Tachometer in a vehicle measures

Fuel consumption

Engine r.p.m.

Distance

Speed

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

Small particles

Large particles

None of these

Sharp edged fragments

37. The Diesel engine works on

Diesel cycle

Rankine cycle

Carnot cycle

Otto cycle

38. Wheel base of a vehicle is the

Extreme length of the vehicle

Distance between the centres of the rear tyres

Distance between the centres of the front tyres

Distance between the centres of the front and rear wheels

39. The ease with which petrol vaporizes is called its

Cetane number

Oxidation

Octane number

Volatility

40. The specific gravity of petrol is about

0.85

0.95

1.25

0.75

Page 5 of 5

41. The function of a governor in automobiles is to

Limit the vehicle speed

Maintain constant engine speed

Maximise the fuel economy

Limit the power

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

Trucks

Matadors

Passenger cars

Tractors

43. The valve tappet clearance is measured by

Screw pitch gauge

Vernier caliper

Feeler gauge

Engineering scale

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

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

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

Air temperature

Air-fuel ratio

Exhaust gas volume

Air flow speed

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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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