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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 main function of intake manifold is that it

Promotes the mixture of air and fuel

Cools the intake air to a suitable temperature

Distributes intake air equally to the cylinders

Reduces intake noise

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

Rapid wearing of the brake pads

Ineffectiveness of the brakes

Judder during braking

Localized wearing of the brake pads

3. Which one of the following statement correctly describes the construction of a bevel gear type differential?

The drive shafts are splined to the differential carrier.

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

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.

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

Partly converts engine power into electric power

Continually recharges the battery

Converts mechanical energy into electrical energy

Supply electric power

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

20%

15%

10%

5%

6. Which of the following oil is more viscous?

SAE 40

SAE 70

SAE 30

SAE 80

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

Exhaust gas volume

Air flow speed

Air temperature

Air-fuel ratio

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

Maintain directional control

Compensate for wear in the steering linkage

Prevent uneven tyre wear

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

9. The power source for a brake booster is

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

Electricity

Exhaust manifold pressure

Hydraulic pump

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

110

90

120

100

Page 2 of 5

11. Tachometer in a vehicle measures

Fuel consumption

Speed

Distance

Engine r.p.m.

12. The Diesel engines are also known as

Compression ignition (C.I.) engines

Steam engines

Spark ignition (S.I.) engines

None of these

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

1-3-4-2

1-2-4-3

1-3-2-4

1-2-3-4

14. The brake pedal during ABS operation

Transmits slight kickback to the driver's foot

Is pushed upward forcefully

Pedal stroke becomes longer

All of the above

15. Bead wires are made of

Aluminium

Copper

Steel

Zinc

16. The specific gravity of petrol is about

0.95

0.85

1.25

0.75

17. The effect of having excess camber is

Hard steering

Excessive steering alignment torque

Uneven tyre wear

Too much traction

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

Big end

Crank arm

Small end

Journal

19. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ammonium chloride

Ethylene glycol

Freon-12

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

Cylinder volume

None of these

Clearance volume

Exhaust volume

Page 3 of 5

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

Adjust the tyre pressure

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

Adjust the damper spring tension

22. Odometer is an instrument used for measurement of

Power

Engine r.p.m.

Fuel consumption

Distance

23. Wheel base of a vehicle is the

Extreme length of the vehicle

Distance between the centres of the front tyres

Distance between the centres of the front and rear wheels

Distance between the centres of the rear tyres

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

Improved emission

Improved power output

All of these

Improved fuel efficiency

25. The function of a governor in automobiles is to

Limit the power

Maximise the fuel economy

Limit the vehicle speed

Maintain constant engine speed

26. The Diesel engine works on

Rankine cycle

Carnot cycle

Otto cycle

Diesel cycle

27. 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/2

2 × P.L.A.N

P.L.A.N/4

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

Matadors

Trucks

Passenger cars

Tractors

29. Cushioning springs in clutch plate reduces

Jerky starts

None of these

Torsional vibrations

Vehicle speed

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

1.00

1.28

2.81

1.82

Page 4 of 5

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

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

Poor recovery of the steering wheel after making a turn

32. Engine misfiring is likely to result from

Spark plug gap too small

Spark plug gap too wide

Vapours lock in the fuel only

Incorrect fuel air mixture

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

Moves the synchronizer

Meshes the gears

Operates the clutch

Selects the synchronizer

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

Belt driven by crankshaft

Chain driven by crankshaft

Belt driven by camshaft

Belt driven by drive-shaft

35. The specific gravity of Diesel is about

0.95

0.75

0.85

0.65

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

82

175

14

65

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

The pressure created by the oil pump

Gravity

Splashing action of the crankshaft

None of these

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

None of these

Large particles

Sharp edged fragments

Small particles

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

Incomplete valve closure

Overheating of the engine

Fouling of spark plug by gasoline

None of these

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

Head light bulb

Stop light bulb

Ignition warning bulb

Parking light bulb

Page 5 of 5

41. The parking brake generally acts on

Front wheels

Rear wheels

Front and rear wheels

Propeller shaft

42. The valve tappet clearance is measured by

Vernier caliper

Engineering scale

Feeler gauge

Screw pitch gauge

43. The ease with which petrol vaporizes is called its

Oxidation

Volatility

Octane number

Cetane number

44. The fuel that detonates easily, is

N-heptane

Benzene

Iso-octane

Alcohol

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

Smaller than the positive terminal post

Of the same size as the positive terminal post

None of these

Larger than the positive terminal post

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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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