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Automobile Engineering MCQs
0

Automobile Engineering Practice Set-6

August 8, 2021

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20%

Page 1 of 5

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

15%

10%

5%

20%

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

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

Continually recharges the battery

Supply electric power

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

90

100

120

110

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

Chain driven by crankshaft

Belt driven by crankshaft

Belt driven by camshaft

Belt driven by drive-shaft

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

1.82

1.28

2.81

1.00

6. The power source for a brake booster is

Electricity

Exhaust manifold pressure

Hydraulic pump

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

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

Clearance volume

Exhaust volume

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

Air temperature

Exhaust gas volume

Air-fuel ratio

Air flow speed

9. The brake pedal during ABS operation

All of the above

Pedal stroke becomes longer

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

10. The fuel that detonates easily, is

Benzene

Alcohol

N-heptane

Iso-octane

Page 2 of 5

11. The ease with which petrol vaporizes is called its

Cetane number

Octane number

Volatility

Oxidation

12. The function of a governor in automobiles is to

Limit the power

Maintain constant engine speed

Limit the vehicle speed

Maximise the fuel economy

13. Odometer is an instrument used for measurement of

Power

Engine r.p.m.

Fuel consumption

Distance

14. The valve tappet clearance is measured by

Vernier caliper

Screw pitch gauge

Feeler gauge

Engineering scale

15. Which of the following oil is more viscous?

SAE 70

SAE 80

SAE 30

SAE 40

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

Maintain directional control

Prevent uneven tyre wear

Compensate for wear in the steering linkage

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

17. Engine misfiring is likely to result from

Incorrect fuel air mixture

Vapours lock in the fuel only

Spark plug gap too wide

Spark plug gap too small

18. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Reduces intake noise

Promotes the mixture of air and fuel

Cools the intake air to a suitable temperature

19. The effect of having excess camber is

Uneven tyre wear

Too much traction

Hard steering

Excessive steering alignment torque

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

Matadors

Passenger cars

Trucks

Tractors

Page 3 of 5

21. 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

22. 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

2 × P.L.A.N

P.L.A.N

P.L.A.N/2

23. The parking brake generally acts on

Rear wheels

Front and rear wheels

Front wheels

Propeller shaft

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

Large particles

Small particles

None of these

Sharp edged fragments

25. Cushioning springs in clutch plate reduces

Jerky starts

None of these

Torsional vibrations

Vehicle speed

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

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

Poor recovery of the steering wheel after making a turn

27. The specific gravity of Diesel is about

0.95

0.85

0.75

0.65

28. 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

Larger than the positive terminal post

None of these

29. The specific gravity of petrol is about

0.95

1.25

0.75

0.85

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

175

82

14

65

Page 4 of 5

31. Which one of the following statement correctly describes the construction of a bevel gear type differential?

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.

The differential carrier houses differential pinion gears and side gears.

32. 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

33. The Diesel engine works on

Otto cycle

Carnot cycle

Diesel cycle

Rankine cycle

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

Localized wearing of the brake pads

Rapid wearing of the brake pads

Ineffectiveness of the brakes

Judder during braking

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

Big end

Journal

Small end

Crank arm

36. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Ammonium chloride

Freon-12

Carbon disulphide

37. Tachometer in a vehicle measures

Engine r.p.m.

Distance

Speed

Fuel consumption

38. Bead wires are made of

Steel

Zinc

Aluminium

Copper

39. Wheel base of a vehicle is the

Extreme length of the vehicle

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

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

Improved emission

Improved power output

All of these

Improved fuel efficiency

Page 5 of 5

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

1-3-2-4

1-2-3-4

1-3-4-2

1-2-4-3

42. The Diesel engines are also known as

None of these

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

Steam engines

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

Head light bulb

Stop light bulb

Ignition warning bulb

Parking light bulb

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

Operates the clutch

Moves the synchronizer

Selects the synchronizer

Meshes the gears

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

Adjust the tyre pressure

Rotate the tyres

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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