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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 function of a governor in automobiles is to

Maximise the fuel economy

Limit the power

Limit the vehicle speed

Maintain constant engine speed

2. The Diesel engines are also known as

Compression ignition (C.I.) engines

None of these

Spark ignition (S.I.) engines

Steam engines

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

110

120

100

90

4. 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

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

82

14

175

65

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

None of these

Splashing action of the crankshaft

Gravity

The pressure created by the oil pump

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

10%

5%

20%

15%

8. The power source for a brake booster is

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

Electricity

Hydraulic pump

Exhaust manifold pressure

9. 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

10. The effect of having excess camber is

Hard steering

Excessive steering alignment torque

Too much traction

Uneven tyre wear

Page 2 of 5

11. The brake pedal during ABS operation

All of the above

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

Is pushed upward forcefully

12. The parking brake generally acts on

Front wheels

Propeller shaft

Rear wheels

Front and rear wheels

13. Tachometer in a vehicle measures

Engine r.p.m.

Fuel consumption

Distance

Speed

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

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

Poor recovery of the steering wheel after making a turn

Tendency to assume toe-out orientation

15. 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 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.

16. 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

17. The specific gravity of Diesel is about

0.85

0.65

0.95

0.75

18. 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

19. The main function of intake manifold is that it

Reduces intake noise

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

Cools the intake air to a suitable temperature

20. The fuel that detonates easily, is

N-heptane

Alcohol

Iso-octane

Benzene

Page 3 of 5

21. The ease with which petrol vaporizes is called its

Octane number

Oxidation

Cetane number

Volatility

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

Trucks

Matadors

Passenger cars

Tractors

23. Bead wires are made of

Steel

Aluminium

Zinc

Copper

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

1-3-4-2

1-2-3-4

1-2-4-3

1-3-2-4

25. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ammonium chloride

Ethylene glycol

Freon-12

26. Which of the following oil is more viscous?

SAE 70

SAE 30

SAE 80

SAE 40

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

Judder during braking

Localized wearing of the brake pads

Ineffectiveness of the brakes

Rapid wearing of the brake pads

28. Odometer is an instrument used for measurement of

Distance

Engine r.p.m.

Fuel consumption

Power

29. Engine misfiring is likely to result from

Spark plug gap too small

Incorrect fuel air mixture

Spark plug gap too wide

Vapours lock in the fuel only

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

Improved emission

All of these

Improved power output

Improved fuel efficiency

Page 4 of 5

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

1.00

1.82

2.81

1.28

32. 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

33. The Diesel engine works on

Rankine cycle

Diesel cycle

Otto cycle

Carnot cycle

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

Crank arm

Journal

Big end

Small end

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

Converts mechanical energy into electrical energy

Continually recharges the battery

Partly converts engine power into electric power

Supply electric power

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

Sharp edged fragments

Large particles

Small particles

None of these

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

Air-fuel ratio

Exhaust gas volume

Air flow speed

Air temperature

38. Wheel base of a vehicle is the

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

Extreme length of the vehicle

Distance between the centres of the front tyres

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

None of these

Incomplete valve closure

Overheating of the engine

Fouling of spark plug by gasoline

40. The valve tappet clearance is measured by

Engineering scale

Vernier caliper

Feeler gauge

Screw pitch gauge

Page 5 of 5

41. 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

42. The specific gravity of petrol is about

0.75

0.95

1.25

0.85

43. Cushioning springs in clutch plate reduces

Torsional vibrations

None of these

Vehicle speed

Jerky starts

44. 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

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

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

Adjust the tyre pressure

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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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