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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 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

2. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

Reduces intake noise

Promotes the mixture of air and fuel

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

120

90

110

100

4. The effect of having excess camber is

Too much traction

Excessive steering alignment torque

Uneven tyre wear

Hard steering

5. The valve tappet clearance is measured by

Vernier caliper

Feeler gauge

Engineering scale

Screw pitch gauge

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

10%

5%

20%

15%

7. The function of a governor in automobiles is to

Limit the vehicle speed

Limit the power

Maximise the fuel economy

Maintain constant engine speed

8. Tachometer in a vehicle measures

Engine r.p.m.

Speed

Distance

Fuel consumption

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

Belt driven by drive-shaft

Belt driven by crankshaft

Belt driven by camshaft

Chain driven by crankshaft

10. The specific gravity of Diesel is about

0.85

0.95

0.75

0.65

Page 2 of 5

11. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Ammonium chloride

Carbon disulphide

Freon-12

12. Cushioning springs in clutch plate reduces

Vehicle speed

None of these

Jerky starts

Torsional vibrations

13. 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

2 × P.L.A.N

P.L.A.N

P.L.A.N/4

14. The power source for a brake booster is

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

Electricity

Hydraulic pump

Exhaust manifold pressure

15. The ease with which petrol vaporizes is called its

Cetane number

Octane number

Volatility

Oxidation

16. 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

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

Supply electric power

Converts mechanical energy into electrical energy

Continually recharges the battery

Partly converts engine power into electric power

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

Improved emission

Improved fuel efficiency

All of these

Improved power output

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

Compensate for wear in the steering linkage

Prevent uneven tyre wear

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

Maintain directional control

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

Rotate the tyres

Adjust the damper spring tension

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

Page 3 of 5

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

Sharp edged fragments

Small particles

None of these

Large particles

22. The parking brake generally acts on

Front and rear wheels

Front wheels

Rear wheels

Propeller shaft

23. The specific gravity of petrol is about

1.25

0.95

0.75

0.85

24. 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

None of these

Smaller than the positive terminal post

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

Poor recovery of the steering wheel after making a turn

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

26. Which of the following oil is more viscous?

SAE 80

SAE 30

SAE 40

SAE 70

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

1.82

1.00

1.28

2.81

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

Ineffectiveness of the brakes

Judder during braking

Rapid wearing of the brake pads

Localized wearing of the brake pads

29. The fuel that detonates easily, is

Alcohol

Iso-octane

N-heptane

Benzene

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

Air temperature

Air-fuel ratio

Air flow speed

Exhaust gas volume

Page 4 of 5

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

14

65

82

175

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

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

The differential carrier houses differential pinion gears and side gears.

33. 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

34. Odometer is an instrument used for measurement of

Engine r.p.m.

Fuel consumption

Power

Distance

35. The Diesel engines are also known as

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

Steam engines

None of these

36. The Diesel engine works on

Carnot cycle

Otto cycle

Diesel cycle

Rankine cycle

37. The brake pedal during ABS operation

Transmits slight kickback to the driver's foot

All of the above

Is pushed upward forcefully

Pedal stroke becomes longer

38. Engine misfiring is likely to result from

Spark plug gap too small

Vapours lock in the fuel only

Incorrect fuel air mixture

Spark plug gap too wide

39. Wheel base of a vehicle is the

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

Extreme length of the vehicle

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

Journal

Small end

Big end

Crank arm

Page 5 of 5

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

Clearance volume

None of these

Exhaust volume

Cylinder volume

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

1-3-4-2

1-2-3-4

1-2-4-3

1-3-2-4

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

Head light bulb

Parking light bulb

Ignition warning bulb

Stop light bulb

44. Bead wires are made of

Zinc

Copper

Aluminium

Steel

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

Tractors

Matadors

Passenger cars

Trucks

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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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