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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 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

Judder during braking

Ineffectiveness of the brakes

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

5%

10%

20%

15%

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

Smaller than the positive terminal post

Larger than the positive terminal post

Of the same size as the positive terminal post

None of these

4. 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

5. The commonly used antifreeze solution in automobiles is

Freon-12

Ethylene glycol

Carbon disulphide

Ammonium chloride

6. The specific gravity of Diesel is about

0.95

0.75

0.65

0.85

7. 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

8. Wheel base of a vehicle is the

Distance between the centres of the rear tyres

Distance between the centres of the front tyres

Extreme length of the vehicle

Distance between the centres of the front and rear wheels

9. The function of a governor in automobiles is to

Maintain constant engine speed

Limit the vehicle speed

Maximise the fuel economy

Limit the power

10. 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/4

P.L.A.N/2

Page 2 of 5

11. The Diesel engine works on

Rankine cycle

Carnot cycle

Diesel cycle

Otto cycle

12. The Diesel engines are also known as

None of these

Compression ignition (C.I.) engines

Steam engines

Spark ignition (S.I.) engines

13. Cushioning springs in clutch plate reduces

Torsional vibrations

Vehicle speed

None of these

Jerky starts

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

Big end

Crank arm

Small end

Journal

15. 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

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

Ignition warning bulb

Stop light bulb

Parking light bulb

Head light bulb

17. Tachometer in a vehicle measures

Speed

Engine r.p.m.

Fuel consumption

Distance

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

14

175

82

65

19. The fuel that detonates easily, is

N-heptane

Alcohol

Benzene

Iso-octane

20. The specific gravity of petrol is about

0.95

1.25

0.85

0.75

Page 3 of 5

21. Bead wires are made of

Steel

Zinc

Copper

Aluminium

22. The power source for a brake booster is

Hydraulic pump

Electricity

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

Exhaust manifold pressure

23. The ease with which petrol vaporizes is called its

Octane number

Cetane number

Volatility

Oxidation

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

Large particles

Sharp edged fragments

Small particles

None of these

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

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

Continually recharges the battery

Supply electric power

26. 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; each pinion gear meshes with a different side gear.

The differential carrier houses differential pinion gears and side gears.

27. Odometer is an instrument used for measurement of

Power

Fuel consumption

Distance

Engine r.p.m.

28. The effect of having excess camber is

Hard steering

Uneven tyre wear

Excessive steering alignment torque

Too much traction

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

Improved emission

Improved fuel efficiency

All of these

Improved power output

30. Which of the following oil is more viscous?

SAE 80

SAE 70

SAE 40

SAE 30

Page 4 of 5

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

Tractors

Trucks

Passenger cars

Matadors

32. The valve tappet clearance is measured by

Vernier caliper

Screw pitch gauge

Feeler gauge

Engineering scale

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

120

100

90

110

34. Engine misfiring is likely to result from

Vapours lock in the fuel only

Spark plug gap too small

Spark plug gap too wide

Incorrect fuel air mixture

35. The parking brake generally acts on

Front wheels

Rear wheels

Propeller shaft

Front and rear wheels

36. The brake pedal during ABS operation

Pedal stroke becomes longer

All of the above

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

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

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

Poor recovery of the steering wheel after making a turn

38. The main function of intake manifold is that it

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

Reduces intake noise

Cools the intake air to a suitable temperature

39. 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

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

Meshes the gears

Operates the clutch

Selects the synchronizer

Moves the synchronizer

Page 5 of 5

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

1-2-4-3

1-2-3-4

1-3-2-4

1-3-4-2

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

None of these

Clearance volume

Cylinder volume

Exhaust volume

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

Compensate for wear in the steering linkage

Maintain directional control

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

Prevent uneven tyre wear

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

1.28

1.00

2.81

1.82

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

Air temperature

Air flow speed

Air-fuel ratio

Exhaust gas volume

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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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