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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 main function of intake manifold is that it

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

Reduces intake noise

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

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

Poor recovery of the steering wheel after making a turn

The vehicle to pull to the side of lesser inclination

3. 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

4. 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.

5. The power source for a brake booster is

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

Hydraulic pump

Exhaust manifold pressure

Electricity

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

Improved fuel efficiency

Improved emission

Improved power output

All of these

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

2.81

1.28

1.00

1.82

8. 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

9. The specific gravity of Diesel is about

0.95

0.75

0.65

0.85

10. 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

Page 2 of 5

11. The specific gravity of petrol is about

0.75

0.95

0.85

1.25

12. Bead wires are made of

Zinc

Copper

Aluminium

Steel

13. The parking brake generally acts on

Front wheels

Rear wheels

Propeller shaft

Front and rear wheels

14. Odometer is an instrument used for measurement of

Power

Engine r.p.m.

Distance

Fuel consumption

15. 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

16. The brake pedal during ABS operation

Pedal stroke becomes longer

All of the above

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

17. 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

18. The Diesel engines are also known as

None of these

Spark ignition (S.I.) engines

Steam engines

Compression ignition (C.I.) engines

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

Smaller than the positive terminal post

Larger than the positive terminal post

None of these

Of the same size as the positive terminal post

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

Journal

Crank arm

Small end

Big end

Page 3 of 5

21. The valve tappet clearance is measured by

Screw pitch gauge

Engineering scale

Feeler gauge

Vernier caliper

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

Gravity

Splashing action of the crankshaft

None of these

The pressure created by the oil pump

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

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

Adjust the damper spring tension

Adjust the tyre pressure

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

Parking light bulb

Ignition warning bulb

Head light bulb

Stop light bulb

25. The commonly used antifreeze solution in automobiles is

Freon-12

Carbon disulphide

Ethylene glycol

Ammonium chloride

26. Tachometer in a vehicle measures

Fuel consumption

Speed

Engine r.p.m.

Distance

27. The function of a governor in automobiles is to

Maintain constant engine speed

Maximise the fuel economy

Limit the power

Limit the vehicle speed

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

Partly converts engine power into electric power

Supply electric power

Converts mechanical energy into electrical energy

Continually recharges the battery

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

Moves the synchronizer

Selects the synchronizer

Operates the clutch

Meshes the gears

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

Sharp edged fragments

Large particles

Small particles

None of these

Page 4 of 5

31. The fuel that detonates easily, is

Benzene

Iso-octane

Alcohol

N-heptane

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

Matadors

Passenger cars

Trucks

Tractors

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

None of these

Fouling of spark plug by gasoline

Overheating of the engine

Incomplete valve closure

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

Prevent uneven tyre wear

Maintain directional control

Compensate for wear in the steering linkage

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

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

110

90

120

100

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

82

65

14

175

37. Engine misfiring is likely to result from

Incorrect fuel air mixture

Spark plug gap too wide

Vapours lock in the fuel only

Spark plug gap too small

38. 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

39. The effect of having excess camber is

Too much traction

Uneven tyre wear

Hard steering

Excessive steering alignment torque

40. The Diesel engine works on

Rankine cycle

Diesel cycle

Otto cycle

Carnot cycle

Page 5 of 5

41. Which of the following oil is more viscous?

SAE 40

SAE 70

SAE 80

SAE 30

42. Cushioning springs in clutch plate reduces

Jerky starts

None of these

Torsional vibrations

Vehicle speed

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

10%

15%

20%

5%

44. The ease with which petrol vaporizes is called its

Octane number

Oxidation

Cetane number

Volatility

45. 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/4

P.L.A.N/2

2 × P.L.A.N

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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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