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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. Odometer is an instrument used for measurement of

Fuel consumption

Distance

Engine r.p.m.

Power

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

None of these

Fouling of spark plug by gasoline

Incomplete valve closure

Overheating of the engine

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

All of these

Improved fuel efficiency

Improved power output

Improved emission

4. 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

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

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

Supply electric power

Continually recharges the battery

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

Localized wearing of the brake pads

Judder during braking

Rapid wearing of the brake pads

Ineffectiveness of the brakes

7. Tachometer in a vehicle measures

Distance

Engine r.p.m.

Fuel consumption

Speed

8. The effect of having excess camber is

Too much traction

Uneven tyre wear

Excessive steering alignment torque

Hard steering

9. 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.

The differential carrier houses differential pinion gears and side gears; each pinion gear meshes with a different side gear.

The drive shafts are splined to the differential carrier.

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

The pressure created by the oil pump

None of these

Splashing action of the crankshaft

Gravity

Page 2 of 5

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

Cylinder volume

Exhaust volume

Clearance volume

None of these

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

Maintain directional control

Prevent uneven tyre wear

Compensate for wear in the steering linkage

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

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

Small particles

Sharp edged fragments

None of these

Large particles

14. The specific gravity of Diesel is about

0.75

0.95

0.85

0.65

15. The valve tappet clearance is measured by

Screw pitch gauge

Engineering scale

Feeler gauge

Vernier caliper

16. The parking brake generally acts on

Rear wheels

Front and rear wheels

Front wheels

Propeller shaft

17. Wheel base of a vehicle is the

Distance between the centres of the front and rear wheels

Extreme length of the vehicle

Distance between the centres of the front tyres

Distance between the centres of the rear tyres

18. Engine misfiring is likely to result from

Incorrect fuel air mixture

Spark plug gap too small

Vapours lock in the fuel only

Spark plug gap too wide

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

Journal

Big end

Crank arm

Small end

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

Air flow speed

Air-fuel ratio

Exhaust gas volume

Air temperature

Page 3 of 5

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

Belt driven by crankshaft

Belt driven by drive-shaft

Chain driven by crankshaft

Belt driven by camshaft

22. The Diesel engines are also known as

None of these

Compression ignition (C.I.) engines

Steam engines

Spark ignition (S.I.) engines

23. The specific gravity of petrol is about

0.95

0.75

1.25

0.85

24. The fuel that detonates easily, is

Alcohol

Benzene

Iso-octane

N-heptane

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

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

Poor recovery of the steering wheel after making a turn

The vehicle to pull to the side of lesser inclination

26. The Diesel engine works on

Rankine cycle

Otto cycle

Diesel cycle

Carnot cycle

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

100

110

120

90

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

1.00

1.82

2.81

1.28

29. The main function of intake manifold is that it

Reduces intake noise

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

30. Cushioning springs in clutch plate reduces

Torsional vibrations

None of these

Jerky starts

Vehicle speed

Page 4 of 5

31. The power source for a brake booster is

Hydraulic pump

Electricity

Exhaust manifold pressure

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

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

Ignition warning bulb

Head light bulb

Parking light bulb

Stop light bulb

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

Moves the synchronizer

Selects the synchronizer

Operates the clutch

Meshes the gears

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

Trucks

Matadors

Passenger cars

Tractors

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

Larger than the positive terminal post

None of these

Of the same size as the positive terminal post

Smaller than the positive terminal post

36. 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)

2 × P.L.A.N

P.L.A.N/2

P.L.A.N

P.L.A.N/4

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

Adjust the damper spring tension

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

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

10%

20%

15%

5%

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

82

175

14

65

40. The ease with which petrol vaporizes is called its

Octane number

Oxidation

Cetane number

Volatility

Page 5 of 5

41. The brake pedal during ABS operation

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

All of the above

Pedal stroke becomes longer

42. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Freon-12

Carbon disulphide

Ethylene glycol

43. Which of the following oil is more viscous?

SAE 30

SAE 40

SAE 70

SAE 80

44. Bead wires are made of

Copper

Steel

Zinc

Aluminium

45. The function of a governor in automobiles is to

Maintain constant engine speed

Maximise the fuel economy

Limit the power

Limit the vehicle speed

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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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