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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 power source for a brake booster is

Electricity

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

Exhaust manifold pressure

Hydraulic pump

2. The brake pedal during ABS operation

Pedal stroke becomes longer

All of the above

Transmits slight kickback to the driver's foot

Is pushed upward forcefully

3. Cushioning springs in clutch plate reduces

Torsional vibrations

None of these

Vehicle speed

Jerky starts

4. 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

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

120

100

90

110

6. The parking brake generally acts on

Front wheels

Propeller shaft

Rear wheels

Front and rear wheels

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

Splashing action of the crankshaft

Gravity

The pressure created by the oil pump

None of these

8. The Diesel engine works on

Otto cycle

Rankine cycle

Carnot cycle

Diesel cycle

9. The ease with which petrol vaporizes is called its

Volatility

Octane number

Cetane number

Oxidation

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

None of these

Sharp edged fragments

Large particles

Small particles

Page 2 of 5

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

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

Maintain directional control

Compensate for wear in the steering linkage

Prevent uneven tyre wear

12. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ammonium chloride

Freon-12

Ethylene glycol

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

1.00

1.82

1.28

2.81

14. The specific gravity of petrol is about

1.25

0.95

0.85

0.75

15. 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

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

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

1-3-2-4

1-2-4-3

1-2-3-4

1-3-4-2

18. The valve tappet clearance is measured by

Feeler gauge

Vernier caliper

Screw pitch gauge

Engineering scale

19. The effect of having excess camber is

Excessive steering alignment torque

Hard steering

Uneven tyre wear

Too much traction

20. 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

Page 3 of 5

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

Stop light bulb

Ignition warning bulb

Parking light bulb

Head light bulb

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

The vehicle to pull to the side of lesser inclination

Poor recovery of the steering wheel after making a turn

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

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

Rapid wearing of the brake pads

Judder during braking

Localized wearing of the brake pads

Ineffectiveness of the brakes

24. Tachometer in a vehicle measures

Engine r.p.m.

Speed

Distance

Fuel consumption

25. The specific gravity of Diesel is about

0.65

0.95

0.85

0.75

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

Operates the clutch

Moves the synchronizer

Meshes the gears

Selects the synchronizer

27. Which of the following oil is more viscous?

SAE 40

SAE 70

SAE 80

SAE 30

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

Tractors

Passenger cars

Trucks

Matadors

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

Fouling of spark plug by gasoline

Incomplete valve closure

None of these

Overheating of the engine

30. Bead wires are made of

Zinc

Aluminium

Steel

Copper

Page 4 of 5

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

Exhaust volume

None of these

Cylinder volume

Clearance volume

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

Air flow speed

Exhaust gas volume

Air temperature

Air-fuel ratio

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

Big end

Crank arm

Small end

Journal

34. Odometer is an instrument used for measurement of

Engine r.p.m.

Distance

Power

Fuel consumption

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

Of the same size as the positive terminal post

Smaller than the positive terminal post

None of these

Larger than the positive terminal post

36. The fuel that detonates easily, is

N-heptane

Iso-octane

Benzene

Alcohol

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

Improved power output

Improved emission

All of these

Improved fuel efficiency

38. The Diesel engines are also known as

None of these

Spark ignition (S.I.) engines

Steam engines

Compression ignition (C.I.) engines

39. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

Cools the intake air to a suitable temperature

Reduces intake noise

40. Engine misfiring is likely to result from

Spark plug gap too wide

Spark plug gap too small

Vapours lock in the fuel only

Incorrect fuel air mixture

Page 5 of 5

41. 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/4

P.L.A.N

42. The function of a governor in automobiles is to

Limit the vehicle speed

Limit the power

Maximise the fuel economy

Maintain constant engine speed

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

10%

15%

20%

5%

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

175

14

65

82

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

Rotate the tyres

Adjust the tyre pressure

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

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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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