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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. Which of the following oil is more viscous?

SAE 80

SAE 30

SAE 70

SAE 40

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

Parking light bulb

Head light bulb

Ignition warning bulb

Stop light bulb

3. The power source for a brake booster is

Exhaust manifold pressure

Electricity

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

Hydraulic pump

4. The effect of having excess camber is

Hard steering

Excessive steering alignment torque

Uneven tyre wear

Too much traction

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

Maintain directional control

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

Compensate for wear in the steering linkage

Prevent uneven tyre wear

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

82

14

175

65

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

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

Continually recharges the battery

Supply electric power

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

Matadors

Tractors

Passenger cars

Trucks

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

100

120

110

90

10. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ammonium chloride

Freon-12

Ethylene glycol

Page 2 of 5

11. The valve tappet clearance is measured by

Feeler gauge

Screw pitch gauge

Engineering scale

Vernier caliper

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

Gravity

Splashing action of the crankshaft

The pressure created by the oil pump

None of these

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

P.L.A.N/2

2 × P.L.A.N

P.L.A.N/4

14. 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 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.

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

Incomplete valve closure

None of these

Fouling of spark plug by gasoline

Overheating of the engine

16. The function of a governor in automobiles is to

Limit the power

Maintain constant engine speed

Maximise the fuel economy

Limit the vehicle speed

17. Odometer is an instrument used for measurement of

Power

Engine r.p.m.

Fuel consumption

Distance

18. The Diesel engines are also known as

Compression ignition (C.I.) engines

Steam engines

None of these

Spark ignition (S.I.) engines

19. The specific gravity of Diesel is about

0.65

0.85

0.75

0.95

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

10%

20%

5%

15%

Page 3 of 5

21. The Diesel engine works on

Carnot cycle

Rankine cycle

Diesel cycle

Otto cycle

22. The brake pedal during ABS operation

Transmits slight kickback to the driver's foot

Is pushed upward forcefully

All of the above

Pedal stroke becomes longer

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

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

Adjust the tyre pressure

24. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

Reduces intake noise

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

Poor recovery of the steering wheel after making a turn

Generation of a braking effect at tight corners

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

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

1.82

2.81

1.00

1.28

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

Operates the clutch

Selects the synchronizer

Meshes the gears

Moves the synchronizer

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

Small end

Big end

Crank arm

Journal

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

Small particles

Sharp edged fragments

None of these

Large particles

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

Air-fuel ratio

Exhaust gas volume

Air temperature

Air flow speed

Page 4 of 5

31. 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

32. The parking brake generally acts on

Rear wheels

Front and rear wheels

Propeller shaft

Front wheels

33. The fuel that detonates easily, is

N-heptane

Benzene

Iso-octane

Alcohol

34. The specific gravity of petrol is about

1.25

0.85

0.95

0.75

35. The ease with which petrol vaporizes is called its

Cetane number

Oxidation

Volatility

Octane number

36. Tachometer in a vehicle measures

Fuel consumption

Speed

Distance

Engine r.p.m.

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

Chain driven by crankshaft

Belt driven by drive-shaft

Belt driven by camshaft

Belt driven by crankshaft

38. Bead wires are made of

Zinc

Copper

Aluminium

Steel

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

None of these

Clearance volume

Exhaust volume

Cylinder volume

40. Wheel base of a vehicle is the

Distance between the centres of the rear tyres

Distance between the centres of the front tyres

Extreme length of the vehicle

Distance between the centres of the front and rear wheels

Page 5 of 5

41. Engine misfiring is likely to result from

Vapours lock in the fuel only

Spark plug gap too small

Incorrect fuel air mixture

Spark plug gap too wide

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

Improved fuel efficiency

Improved emission

Improved power output

All of these

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

Rapid wearing of the brake pads

Judder during braking

Ineffectiveness of the brakes

Localized wearing of the brake pads

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

Smaller than the positive terminal post

Of the same size as the positive terminal post

None of these

Larger than the positive terminal post

45. Cushioning springs in clutch plate reduces

None of these

Torsional vibrations

Jerky starts

Vehicle speed

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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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