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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 brake pedal during ABS operation

Is pushed upward forcefully

All of the above

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

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

Rapid wearing of the brake pads

Localized wearing of the brake pads

Ineffectiveness of the brakes

Judder during braking

3. 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

P.L.A.N/2

P.L.A.N/4

4. The specific gravity of Diesel is about

0.75

0.95

0.85

0.65

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

Meshes the gears

Selects the synchronizer

Operates the clutch

Moves the synchronizer

6. The fuel that detonates easily, is

Alcohol

Benzene

N-heptane

Iso-octane

7. The Diesel engines are also known as

Steam engines

Spark ignition (S.I.) engines

None of these

Compression ignition (C.I.) engines

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

Air flow speed

Air-fuel ratio

Air temperature

Exhaust gas volume

9. Tachometer in a vehicle measures

Fuel consumption

Engine r.p.m.

Speed

Distance

10. Which of the following oil is more viscous?

SAE 30

SAE 70

SAE 40

SAE 80

Page 2 of 5

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

5%

20%

10%

15%

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

Splashing action of the crankshaft

None of these

Gravity

The pressure created by the oil pump

13. Cushioning springs in clutch plate reduces

None of these

Jerky starts

Vehicle speed

Torsional vibrations

14. The Diesel engine works on

Carnot cycle

Rankine cycle

Otto cycle

Diesel cycle

15. The power source for a brake booster is

Electricity

Hydraulic pump

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

Exhaust manifold pressure

16. 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

Compensate for wear in the steering linkage

Prevent uneven tyre wear

17. 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

18. The parking brake generally acts on

Front and rear wheels

Propeller shaft

Rear wheels

Front wheels

19. The ease with which petrol vaporizes is called its

Oxidation

Volatility

Octane number

Cetane number

20. Bead wires are made of

Zinc

Steel

Aluminium

Copper

Page 3 of 5

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

1.00

1.82

2.81

1.28

22. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Reduces intake noise

Promotes the mixture of air and fuel

Cools the intake air to a suitable temperature

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

Small end

Crank arm

Big end

Journal

24. The effect of having excess camber is

Uneven tyre wear

Too much traction

Hard steering

Excessive steering alignment torque

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

1-3-4-2

1-2-3-4

1-3-2-4

1-2-4-3

26. Odometer is an instrument used for measurement of

Engine r.p.m.

Power

Fuel consumption

Distance

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

Cylinder volume

None of these

Exhaust volume

Clearance volume

28. 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; 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.

The left side gear and the differential carrier rotate in constant unison.

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

None of these

Sharp edged fragments

Large particles

Small particles

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

Larger than the positive terminal post

None of these

Smaller than the positive terminal post

Of the same size as the positive terminal post

Page 4 of 5

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

120

110

100

90

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

Improved emission

Improved fuel efficiency

All of these

Improved power output

33. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ammonium chloride

Ethylene glycol

Freon-12

34. The function of a governor in automobiles is to

Maintain constant engine speed

Limit the vehicle speed

Limit the power

Maximise the fuel economy

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

Matadors

Trucks

Passenger cars

Tractors

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

Poor recovery of the steering wheel after making a turn

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

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

Fouling of spark plug by gasoline

Incomplete valve closure

None of these

Overheating of the engine

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

175

65

82

14

39. The specific gravity of petrol is about

0.95

0.75

0.85

1.25

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

Converts mechanical energy into electrical energy

Supply electric power

Partly converts engine power into electric power

Continually recharges the battery

Page 5 of 5

41. The valve tappet clearance is measured by

Engineering scale

Vernier caliper

Screw pitch gauge

Feeler gauge

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

Belt driven by camshaft

Belt driven by drive-shaft

Belt driven by crankshaft

Chain driven by crankshaft

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

Ignition warning bulb

Head light bulb

Stop light bulb

Parking light bulb

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

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

Adjust the damper spring tension

45. Engine misfiring is likely to result from

Spark plug gap too wide

Incorrect fuel air mixture

Vapours lock in the fuel only

Spark plug gap too small

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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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