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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 basic purpose of providing caster angle on wheels is to

Compensate for wear in the steering linkage

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

Prevent uneven tyre wear

Maintain directional control

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

Clearance volume

Cylinder volume

None of these

Exhaust volume

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

20%

10%

15%

5%

4. 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.

5. 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

6. Cushioning springs in clutch plate reduces

Jerky starts

Torsional vibrations

Vehicle speed

None of these

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

Ineffectiveness of the brakes

Localized wearing of the brake pads

Judder during braking

Rapid wearing of the brake pads

8. Tachometer in a vehicle measures

Fuel consumption

Speed

Distance

Engine r.p.m.

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

Journal

Small end

Big end

Crank arm

10. The Diesel engines are also known as

None of these

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

Steam engines

Page 2 of 5

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

Continually recharges the battery

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

Supply electric power

12. 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

13. The ease with which petrol vaporizes is called its

Octane number

Cetane number

Volatility

Oxidation

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

1.82

1.28

2.81

1.00

15. The main function of intake manifold is that it

Reduces intake noise

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

16. 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

17. The parking brake generally acts on

Front and rear wheels

Front wheels

Propeller shaft

Rear wheels

18. 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

19. Wheel base of a vehicle is the

Distance between the centres of the front tyres

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

Extreme length of the vehicle

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

Large particles

None of these

Sharp edged fragments

Small particles

Page 3 of 5

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

Improved fuel efficiency

Improved emission

All of these

Improved power output

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

90

110

100

120

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

Parking light bulb

Stop light bulb

Ignition warning bulb

Head light bulb

24. Which of the following oil is more viscous?

SAE 80

SAE 40

SAE 30

SAE 70

25. The function of a governor in automobiles is to

Maximise the fuel economy

Maintain constant engine speed

Limit the vehicle speed

Limit the power

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

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

Rotate the tyres

27. The brake pedal during ABS operation

Transmits slight kickback to the driver's foot

All of the above

Is pushed upward forcefully

Pedal stroke becomes longer

28. 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

29. The effect of having excess camber is

Excessive steering alignment torque

Uneven tyre wear

Hard steering

Too much traction

30. The specific gravity of petrol is about

1.25

0.75

0.95

0.85

Page 4 of 5

31. The fuel that detonates easily, is

Alcohol

Benzene

Iso-octane

N-heptane

32. The Diesel engine works on

Otto cycle

Rankine cycle

Carnot cycle

Diesel cycle

33. The power source for a brake booster is

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

Exhaust manifold pressure

Hydraulic pump

Electricity

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

Fouling of spark plug by gasoline

None of these

Incomplete valve closure

Overheating of the engine

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

Gravity

None of these

Splashing action of the crankshaft

The pressure created by the oil pump

36. 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

37. The specific gravity of Diesel is about

0.75

0.95

0.65

0.85

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

175

65

14

82

39. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Ammonium chloride

Freon-12

Carbon disulphide

40. The valve tappet clearance is measured by

Engineering scale

Screw pitch gauge

Feeler gauge

Vernier caliper

Page 5 of 5

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

1-3-2-4

1-2-3-4

1-2-4-3

1-3-4-2

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

Passenger cars

Tractors

Matadors

Trucks

43. Odometer is an instrument used for measurement of

Fuel consumption

Engine r.p.m.

Distance

Power

44. Bead wires are made of

Aluminium

Copper

Steel

Zinc

45. 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

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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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