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

82

65

175

14

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

Localized wearing of the brake pads

Judder during braking

Ineffectiveness of the brakes

Rapid wearing of the brake pads

3. 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

4. Odometer is an instrument used for measurement of

Fuel consumption

Distance

Engine r.p.m.

Power

5. Cushioning springs in clutch plate reduces

Torsional vibrations

Jerky starts

None of these

Vehicle speed

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

5%

20%

15%

10%

7. Wheel base of a vehicle is the

Distance between the centres of the front tyres

Extreme length of the vehicle

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

8. Bead wires are made of

Zinc

Aluminium

Copper

Steel

9. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

Reduces intake noise

Distributes intake air equally to the cylinders

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

1.00

1.82

2.81

1.28

Page 2 of 5

11. 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

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

Air flow speed

Air-fuel ratio

Air temperature

Exhaust gas volume

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

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

Adjust the damper spring tension

Rotate the tyres

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

The drive shafts are splined to the differential carrier.

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

All of these

Improved emission

Improved power output

Improved fuel efficiency

16. The function of a governor in automobiles is to

Maximise the fuel economy

Limit the vehicle speed

Limit the power

Maintain constant engine speed

17. Which of the following oil is more viscous?

SAE 30

SAE 80

SAE 70

SAE 40

18. The commonly used antifreeze solution in automobiles is

Freon-12

Carbon disulphide

Ammonium chloride

Ethylene glycol

19. 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

20. The Diesel engine works on

Otto cycle

Diesel cycle

Rankine cycle

Carnot cycle

Page 3 of 5

21. The valve tappet clearance is measured by

Engineering scale

Feeler gauge

Vernier caliper

Screw pitch gauge

22. The fuel that detonates easily, is

Alcohol

Benzene

Iso-octane

N-heptane

23. The ease with which petrol vaporizes is called its

Volatility

Cetane number

Oxidation

Octane number

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

Selects the synchronizer

Meshes the gears

Operates the clutch

Moves the synchronizer

25. The specific gravity of Diesel is about

0.75

0.95

0.65

0.85

26. The effect of having excess camber is

Hard steering

Too much traction

Excessive steering alignment torque

Uneven tyre wear

27. The power source for a brake booster is

Hydraulic pump

Electricity

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

Exhaust manifold pressure

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

Chain driven by crankshaft

Belt driven by camshaft

Belt driven by crankshaft

Belt driven by drive-shaft

29. Tachometer in a vehicle measures

Engine r.p.m.

Speed

Fuel consumption

Distance

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

Sharp edged fragments

None of these

Large particles

Small particles

Page 4 of 5

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

Prevent uneven tyre wear

Compensate for wear in the steering linkage

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

Maintain directional control

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

Journal

Crank arm

Small end

Big end

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

Tendency to assume toe-out orientation

Poor recovery of the steering wheel after making a turn

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

34. 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

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

Continually recharges the battery

Partly converts engine power into electric power

Supply electric power

Converts mechanical energy into electrical energy

36. 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

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

90

120

110

100

38. 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

39. The Diesel engines are also known as

Steam engines

Spark ignition (S.I.) engines

None of these

Compression ignition (C.I.) engines

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

1-3-4-2

1-2-4-3

1-2-3-4

1-3-2-4

Page 5 of 5

41. The parking brake generally acts on

Front wheels

Propeller shaft

Front and rear wheels

Rear wheels

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

Matadors

Trucks

Tractors

Passenger cars

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

Larger than the positive terminal post

Smaller than the positive terminal post

None of these

Of the same size as the positive terminal post

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

Clearance volume

Cylinder volume

Exhaust volume

None of these

45. The specific gravity of petrol is about

1.25

0.85

0.95

0.75

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VideRime

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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