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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 advantage of the fuel injection system over the carburettor system is

All of these

Improved emission

Improved fuel efficiency

Improved power output

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

Ineffectiveness of the brakes

Localized wearing of the brake pads

Rapid wearing of the brake pads

Judder during braking

3. The function of a governor in automobiles is to

Limit the power

Limit the vehicle speed

Maximise the fuel economy

Maintain constant engine speed

4. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Freon-12

Ethylene glycol

Carbon disulphide

5. The fuel that detonates easily, is

N-heptane

Iso-octane

Benzene

Alcohol

6. The specific gravity of petrol is about

1.25

0.85

0.95

0.75

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

Exhaust gas volume

Air flow speed

Air temperature

Air-fuel ratio

8. Cushioning springs in clutch plate reduces

Torsional vibrations

Jerky starts

Vehicle speed

None of these

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

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

Poor recovery of the steering wheel after making a turn

10. The ease with which petrol vaporizes is called its

Volatility

Cetane number

Oxidation

Octane number

Page 2 of 5

11. The main function of intake manifold is that it

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

Reduces intake noise

12. 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

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

Continually recharges the battery

Supply electric power

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

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

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

Prevent uneven tyre wear

Maintain directional control

Compensate for wear in the steering linkage

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

Tractors

Trucks

Passenger cars

Matadors

16. The brake pedal during ABS operation

All of the above

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

Is pushed upward forcefully

17. 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

18. 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

19. Which of the following oil is more viscous?

SAE 40

SAE 30

SAE 80

SAE 70

20. 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

2 × P.L.A.N

P.L.A.N/4

P.L.A.N/2

Page 3 of 5

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

Splashing action of the crankshaft

None of these

The pressure created by the oil pump

Gravity

22. The power source for a brake booster is

Exhaust manifold pressure

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

Hydraulic pump

Electricity

23. The effect of having excess camber is

Uneven tyre wear

Too much traction

Hard steering

Excessive steering alignment torque

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

65

14

175

82

25. The valve tappet clearance is measured by

Vernier caliper

Screw pitch gauge

Feeler gauge

Engineering scale

26. The Diesel engine works on

Rankine cycle

Carnot cycle

Diesel cycle

Otto cycle

27. Engine misfiring is likely to result from

Vapours lock in the fuel only

Spark plug gap too wide

Incorrect fuel air mixture

Spark plug gap too small

28. Bead wires are made of

Copper

Aluminium

Steel

Zinc

29. The parking brake generally acts on

Rear wheels

Propeller shaft

Front wheels

Front and rear wheels

30. Tachometer in a vehicle measures

Speed

Fuel consumption

Engine r.p.m.

Distance

Page 4 of 5

31. 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 front tyres

Distance between the centres of the rear tyres

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

Parking light bulb

Ignition warning bulb

Stop light bulb

Head light bulb

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

15%

20%

5%

10%

34. The specific gravity of Diesel is about

0.85

0.75

0.65

0.95

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

Smaller than the positive terminal post

Larger than the positive terminal post

Of the same size as the positive terminal post

None of these

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

None of these

Sharp edged fragments

Small particles

Large particles

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

Big end

Crank arm

Small end

Journal

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

Overheating of the engine

Fouling of spark plug by gasoline

None of these

Incomplete valve closure

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

The drive shafts are splined to the differential carrier.

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

Belt driven by drive-shaft

Chain driven by crankshaft

Belt driven by camshaft

Belt driven by crankshaft

Page 5 of 5

41. The Diesel engines are also known as

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

None of these

Steam engines

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

90

100

120

110

43. Odometer is an instrument used for measurement of

Power

Fuel consumption

Engine r.p.m.

Distance

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

2.81

1.00

1.82

1.28

45. 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

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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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