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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 negative terminal post on the top of a battery is

Of the same size as the positive terminal post

None of these

Larger than the positive terminal post

Smaller than the positive terminal post

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

None of these

Incomplete valve closure

Fouling of spark plug by gasoline

Overheating of the engine

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

90

100

120

110

4. The function of a governor in automobiles is to

Limit the vehicle speed

Maintain constant engine speed

Maximise the fuel economy

Limit the power

5. Cushioning springs in clutch plate reduces

Torsional vibrations

None of these

Vehicle speed

Jerky starts

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

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

Tendency to assume toe-out orientation

7. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

Reduces intake noise

Promotes the mixture of air and fuel

8. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ammonium chloride

Ethylene glycol

Freon-12

9. The parking brake generally acts on

Propeller shaft

Front and rear wheels

Front wheels

Rear wheels

10. The Diesel engine works on

Carnot cycle

Rankine cycle

Otto cycle

Diesel cycle

Page 2 of 5

11. Bead wires are made of

Copper

Zinc

Aluminium

Steel

12. 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

13. The effect of having excess camber is

Excessive steering alignment torque

Hard steering

Too much traction

Uneven tyre wear

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

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

Adjust the damper spring tension

Adjust the tyre pressure

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

Partly converts engine power into electric power

Supply electric power

Converts mechanical energy into electrical energy

Continually recharges the battery

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

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

Maintain directional control

Compensate for wear in the steering linkage

Prevent uneven tyre wear

17. 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.

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

Judder during braking

Rapid wearing of the brake pads

Localized wearing of the brake pads

Ineffectiveness of the brakes

19. Odometer is an instrument used for measurement of

Power

Fuel consumption

Engine r.p.m.

Distance

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

Splashing action of the crankshaft

The pressure created by the oil pump

Gravity

None of these

Page 3 of 5

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

Improved fuel efficiency

Improved power output

All of these

Improved emission

22. The specific gravity of Diesel is about

0.95

0.65

0.85

0.75

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

1.82

1.00

1.28

2.81

24. 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

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

Moves the synchronizer

Operates the clutch

Selects the synchronizer

Meshes the gears

26. The brake pedal during ABS operation

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

All of the above

27. Engine misfiring is likely to result from

Vapours lock in the fuel only

Spark plug gap too small

Incorrect fuel air mixture

Spark plug gap too wide

28. The valve tappet clearance is measured by

Engineering scale

Feeler gauge

Screw pitch gauge

Vernier caliper

29. Tachometer in a vehicle measures

Engine r.p.m.

Fuel consumption

Speed

Distance

30. The ease with which petrol vaporizes is called its

Cetane number

Octane number

Volatility

Oxidation

Page 4 of 5

31. The Diesel engines are also known as

Steam engines

Spark ignition (S.I.) engines

None of these

Compression ignition (C.I.) engines

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

1-2-4-3

1-3-4-2

1-2-3-4

1-3-2-4

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

10%

20%

15%

5%

34. The fuel that detonates easily, is

Benzene

N-heptane

Iso-octane

Alcohol

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

Air-fuel ratio

Air flow speed

Exhaust gas volume

Air temperature

36. The specific gravity of petrol is about

0.95

0.85

0.75

1.25

37. The power source for a brake booster is

Hydraulic pump

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

Electricity

Exhaust manifold pressure

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

Cylinder volume

Clearance volume

None of these

Exhaust volume

39. 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

P.L.A.N/4

P.L.A.N/2

2 × P.L.A.N

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

Chain driven by crankshaft

Belt driven by crankshaft

Belt driven by camshaft

Belt driven by drive-shaft

Page 5 of 5

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

82

65

175

14

42. Which of the following oil is more viscous?

SAE 40

SAE 80

SAE 70

SAE 30

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

Passenger cars

Tractors

Matadors

Trucks

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

Large particles

None of these

Small particles

Sharp edged fragments

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

Crank arm

Small end

Journal

Big end

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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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