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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 valve tappet clearance is measured by

Engineering scale

Screw pitch gauge

Feeler gauge

Vernier caliper

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

82

14

175

65

3. Which of the following oil is more viscous?

SAE 40

SAE 80

SAE 70

SAE 30

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

Exhaust volume

Clearance volume

None of these

Cylinder volume

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

1.00

1.82

1.28

2.81

6. Odometer is an instrument used for measurement of

Power

Fuel consumption

Engine r.p.m.

Distance

7. The brake pedal during ABS operation

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

All of the above

Is pushed upward forcefully

8. The specific gravity of Diesel is about

0.75

0.85

0.95

0.65

9. The specific gravity of petrol is about

1.25

0.95

0.85

0.75

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

Gravity

None of these

The pressure created by the oil pump

Splashing action of the crankshaft

Page 2 of 5

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

Small end

Big end

Crank arm

Journal

12. The function of a governor in automobiles is to

Limit the vehicle speed

Maximise the fuel economy

Maintain constant engine speed

Limit the power

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

Adjust the tyre pressure

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

14. Bead wires are made of

Steel

Copper

Aluminium

Zinc

15. 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

16. Tachometer in a vehicle measures

Fuel consumption

Engine r.p.m.

Distance

Speed

17. 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.

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

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.

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

None of these

Overheating of the engine

Fouling of spark plug by gasoline

Incomplete valve closure

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

Passenger cars

Matadors

Trucks

Tractors

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

5%

10%

20%

15%

Page 3 of 5

21. The effect of having excess camber is

Uneven tyre wear

Excessive steering alignment torque

Too much traction

Hard steering

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

Belt driven by camshaft

Chain driven by crankshaft

Belt driven by drive-shaft

Belt driven by crankshaft

23. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

Reduces intake noise

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

Small particles

Sharp edged fragments

Large particles

None of these

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

Judder during braking

Ineffectiveness of the brakes

Localized wearing of the brake pads

Rapid wearing of the brake pads

26. 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

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

1-2-3-4

1-3-2-4

1-3-4-2

1-2-4-3

28. 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/4

P.L.A.N

2 × P.L.A.N

P.L.A.N/2

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

Of the same size as the positive terminal post

Larger than the positive terminal post

Smaller than the positive terminal post

None of these

30. Engine misfiring is likely to result from

Incorrect fuel air mixture

Spark plug gap too small

Spark plug gap too wide

Vapours lock in the fuel only

Page 4 of 5

31. The parking brake generally acts on

Propeller shaft

Front and rear wheels

Front wheels

Rear wheels

32. The fuel that detonates easily, is

Benzene

Alcohol

Iso-octane

N-heptane

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

Moves the synchronizer

Operates the clutch

Meshes the gears

Selects the synchronizer

34. The ease with which petrol vaporizes is called its

Cetane number

Volatility

Octane number

Oxidation

35. The Diesel engine works on

Rankine cycle

Diesel cycle

Otto cycle

Carnot cycle

36. The power source for a brake booster is

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

Exhaust manifold pressure

Electricity

Hydraulic pump

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

Ignition warning bulb

Head light bulb

Stop light bulb

Parking light bulb

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

Air-fuel ratio

Air flow speed

Air temperature

Exhaust gas volume

39. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Carbon disulphide

Freon-12

Ammonium chloride

40. 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

Page 5 of 5

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

100

110

120

90

42. The Diesel engines are also known as

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

Steam engines

None of these

43. 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

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

Improved emission

Improved fuel efficiency

Improved power output

All of these

45. Cushioning springs in clutch plate reduces

Vehicle speed

None of these

Torsional vibrations

Jerky starts

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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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