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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. Bead wires are made of

Copper

Aluminium

Zinc

Steel

2. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ethylene glycol

Ammonium chloride

Freon-12

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

Improved power output

Improved fuel efficiency

Improved emission

All of these

4. The fuel that detonates easily, is

Benzene

N-heptane

Iso-octane

Alcohol

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

Belt driven by crankshaft

Belt driven by drive-shaft

Belt driven by camshaft

Chain driven by crankshaft

6. The Diesel engines are also known as

Spark ignition (S.I.) engines

None of these

Steam engines

Compression ignition (C.I.) engines

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

1-3-4-2

1-2-3-4

1-3-2-4

1-2-4-3

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

Tractors

Trucks

Matadors

Passenger cars

9. 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 drive shafts are splined to the differential carrier.

The differential carrier houses differential pinion gears and side gears.

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

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

Partly converts engine power into electric power

Continually recharges the battery

Supply electric power

Converts mechanical energy into electrical energy

Page 2 of 5

11. 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

12. Cushioning springs in clutch plate reduces

Torsional vibrations

Vehicle speed

Jerky starts

None of these

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

Overheating of the engine

None of these

Incomplete valve closure

Fouling of spark plug by gasoline

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

Small particles

Sharp edged fragments

Large particles

None of these

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

Gravity

The pressure created by the oil pump

Splashing action of the crankshaft

None of these

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

None of these

Smaller than the positive terminal post

Larger than the positive terminal post

Of the same size as the positive terminal post

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

Small end

Big end

Crank arm

Journal

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

100

120

90

110

19. The function of a governor in automobiles is to

Limit the vehicle speed

Maximise the fuel economy

Maintain constant engine speed

Limit the power

20. The power source for a brake booster is

Exhaust manifold pressure

Hydraulic pump

Electricity

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

Page 3 of 5

21. 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

Tendency to assume toe-out orientation

Poor recovery of the steering wheel after making a turn

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

Selects the synchronizer

Operates the clutch

Meshes the gears

Moves the synchronizer

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

Maintain directional control

Prevent uneven tyre wear

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

Compensate for wear in the steering linkage

24. 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

25. The parking brake generally acts on

Rear wheels

Front and rear wheels

Front wheels

Propeller shaft

26. The valve tappet clearance is measured by

Engineering scale

Feeler gauge

Vernier caliper

Screw pitch gauge

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

Adjust the tyre pressure

Adjust the damper spring tension

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

28. The ease with which petrol vaporizes is called its

Cetane number

Volatility

Octane number

Oxidation

29. The effect of having excess camber is

Uneven tyre wear

Hard steering

Too much traction

Excessive steering alignment torque

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

1.28

2.81

1.00

1.82

Page 4 of 5

31. Wheel base of a vehicle is the

Distance between the centres of the front and rear wheels

Distance between the centres of the rear tyres

Distance between the centres of the front tyres

Extreme length of the vehicle

32. 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

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

Parking light bulb

Ignition warning bulb

Head light bulb

Stop light bulb

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

Exhaust volume

None of these

Clearance volume

Cylinder volume

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

5%

15%

10%

20%

36. The specific gravity of petrol is about

1.25

0.75

0.95

0.85

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

65

14

82

175

38. The specific gravity of Diesel is about

0.95

0.75

0.65

0.85

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

Judder during braking

Ineffectiveness of the brakes

Rapid wearing of the brake pads

Localized wearing of the brake pads

40. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Distributes intake air equally to the cylinders

Reduces intake noise

Promotes the mixture of air and fuel

Page 5 of 5

41. Engine misfiring is likely to result from

Incorrect fuel air mixture

Spark plug gap too wide

Spark plug gap too small

Vapours lock in the fuel only

42. The Diesel engine works on

Rankine cycle

Diesel cycle

Otto cycle

Carnot cycle

43. Odometer is an instrument used for measurement of

Engine r.p.m.

Distance

Power

Fuel consumption

44. Tachometer in a vehicle measures

Distance

Engine r.p.m.

Fuel consumption

Speed

45. Which of the following oil is more viscous?

SAE 40

SAE 30

SAE 80

SAE 70

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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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