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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 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

2. The fuel that detonates easily, is

Benzene

Alcohol

N-heptane

Iso-octane

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

Stop light bulb

Head light bulb

Ignition warning bulb

Parking light bulb

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

Large particles

Sharp edged fragments

None of these

Small particles

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

None of these

Splashing action of the crankshaft

Gravity

The pressure created by the oil pump

6. The effect of having excess camber is

Uneven tyre wear

Excessive steering alignment torque

Too much traction

Hard steering

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

None of these

Cylinder volume

Exhaust volume

Clearance volume

8. Cushioning springs in clutch plate reduces

Jerky starts

Torsional vibrations

Vehicle speed

None of these

9. 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

Localized wearing of the brake pads

Judder during braking

10. The function of a governor in automobiles is to

Maximise the fuel economy

Limit the vehicle speed

Maintain constant engine speed

Limit the power

Page 2 of 5

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

1-3-2-4

1-2-4-3

1-3-4-2

1-2-3-4

12. The Diesel engine works on

Rankine cycle

Otto cycle

Diesel cycle

Carnot cycle

13. The power source for a brake booster is

Exhaust manifold pressure

Hydraulic pump

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

Electricity

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

175

14

82

65

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

Crank arm

Journal

Big end

Small end

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

Compensate for wear in the steering linkage

Maintain directional control

Prevent uneven tyre wear

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

17. Tachometer in a vehicle measures

Engine r.p.m.

Distance

Speed

Fuel consumption

18. The Diesel engines are also known as

Compression ignition (C.I.) engines

None of these

Steam engines

Spark ignition (S.I.) engines

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

Improved fuel efficiency

All of these

Improved power output

Improved emission

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

15%

5%

20%

10%

Page 3 of 5

21. The valve tappet clearance is measured by

Engineering scale

Vernier caliper

Feeler gauge

Screw pitch gauge

22. 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

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

24. 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

25. Bead wires are made of

Zinc

Aluminium

Copper

Steel

26. Which of the following oil is more viscous?

SAE 80

SAE 70

SAE 40

SAE 30

27. Odometer is an instrument used for measurement of

Fuel consumption

Distance

Power

Engine r.p.m.

28. The commonly used antifreeze solution in automobiles is

Freon-12

Carbon disulphide

Ammonium chloride

Ethylene glycol

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

120

100

90

110

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

Larger than the positive terminal post

Smaller than the positive terminal post

Of the same size as the positive terminal post

None of these

Page 4 of 5

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

Belt driven by crankshaft

Belt driven by camshaft

Belt driven by drive-shaft

Chain driven by crankshaft

32. 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

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

Tractors

Passenger cars

Trucks

Matadors

34. The ease with which petrol vaporizes is called its

Oxidation

Octane number

Volatility

Cetane number

35. 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

36. The specific gravity of petrol is about

0.85

1.25

0.75

0.95

37. 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

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

Continually recharges the battery

Supply electric power

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

39. The specific gravity of Diesel is about

0.85

0.75

0.95

0.65

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

Incomplete valve closure

Overheating of the engine

None of these

Fouling of spark plug by gasoline

Page 5 of 5

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

Exhaust gas volume

Air temperature

Air flow speed

Air-fuel ratio

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

Selects the synchronizer

Operates the clutch

Moves the synchronizer

Meshes the gears

43. The parking brake generally acts on

Rear wheels

Front wheels

Propeller shaft

Front and rear wheels

44. Wheel base of a vehicle is the

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

Extreme length of the vehicle

Distance between the centres of the front tyres

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

2.81

1.82

1.00

1.28

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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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