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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

Torsional vibrations

None of these

Vehicle speed

Jerky starts

2. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Freon-12

Ammonium chloride

Carbon disulphide

3. The fuel that detonates easily, is

Alcohol

N-heptane

Iso-octane

Benzene

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

5%

20%

15%

10%

5. The parking brake generally acts on

Front and rear wheels

Front wheels

Rear wheels

Propeller shaft

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

Small end

Crank arm

Journal

Big end

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

Selects the synchronizer

Operates the clutch

Meshes the gears

Moves the synchronizer

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

Incomplete valve closure

Fouling of spark plug by gasoline

None of these

Overheating of the engine

9. Wheel base of a vehicle is the

Distance between the centres of the front and rear wheels

Distance between the centres of the front tyres

Distance between the centres of the rear tyres

Extreme length of the vehicle

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

None of these

Smaller than the positive terminal post

Of the same size as the positive terminal post

Larger than the positive terminal post

Page 2 of 5

11. The specific gravity of Diesel is about

0.95

0.85

0.75

0.65

12. The effect of having excess camber is

Uneven tyre wear

Too much traction

Hard steering

Excessive steering alignment torque

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

None of these

Small particles

Large particles

Sharp edged fragments

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

None of these

The pressure created by the oil pump

Splashing action of the crankshaft

Gravity

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

Localized wearing of the brake pads

Ineffectiveness of the brakes

Rapid wearing of the brake pads

Judder during braking

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

Ignition warning bulb

Parking light bulb

Stop light bulb

Head light bulb

17. 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

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

Poor recovery of the steering wheel after making a turn

Generation of a braking effect at tight corners

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

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

Improved emission

Improved power output

All of these

Improved fuel efficiency

20. Which of the following oil is more viscous?

SAE 80

SAE 30

SAE 40

SAE 70

Page 3 of 5

21. The Diesel engine works on

Rankine cycle

Diesel cycle

Carnot cycle

Otto cycle

22. The valve tappet clearance is measured by

Engineering scale

Vernier caliper

Screw pitch gauge

Feeler gauge

23. Engine misfiring is likely to result from

Spark plug gap too small

Vapours lock in the fuel only

Spark plug gap too wide

Incorrect fuel air mixture

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

65

175

14

82

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

Air-fuel ratio

Air temperature

Air flow speed

Exhaust gas volume

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

None of these

Cylinder volume

Clearance volume

Exhaust volume

27. 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 × P.L.A.N

P.L.A.N/2

28. The specific gravity of petrol is about

0.95

0.85

0.75

1.25

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

120

110

100

90

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

Passenger cars

Trucks

Tractors

Matadors

Page 4 of 5

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

1-3-4-2

1-3-2-4

1-2-4-3

1-2-3-4

32. The ease with which petrol vaporizes is called its

Volatility

Octane number

Oxidation

Cetane number

33. 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 camshaft

Belt driven by drive-shaft

34. Odometer is an instrument used for measurement of

Engine r.p.m.

Distance

Fuel consumption

Power

35. The brake pedal during ABS operation

Is pushed upward forcefully

All of the above

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

36. 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 drive shafts are splined to the differential carrier.

The differential carrier houses differential pinion gears and side gears.

The differential carrier houses differential pinion gears and side gears; each pinion gear meshes with a different side gear.

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

Adjust the tyre pressure

Rotate the tyres

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

38. Tachometer in a vehicle measures

Speed

Distance

Fuel consumption

Engine r.p.m.

39. The power source for a brake booster is

Exhaust manifold pressure

Electricity

Hydraulic pump

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

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

Prevent uneven tyre wear

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

Maintain directional control

Compensate for wear in the steering linkage

Page 5 of 5

41. The Diesel engines are also known as

Compression ignition (C.I.) engines

Steam engines

Spark ignition (S.I.) engines

None of these

42. Bead wires are made of

Copper

Zinc

Aluminium

Steel

43. The function of a governor in automobiles is to

Limit the power

Maximise the fuel economy

Maintain constant engine speed

Limit the vehicle speed

44. 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

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

1.28

2.81

1.82

1.00

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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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