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

The pressure created by the oil pump

Splashing action of the crankshaft

Gravity

None of these

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

Belt driven by drive-shaft

Belt driven by camshaft

Chain driven by crankshaft

Belt driven by crankshaft

3. The fuel that detonates easily, is

Iso-octane

Benzene

Alcohol

N-heptane

4. 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

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

Parking light bulb

Stop light bulb

Ignition warning bulb

Head light bulb

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

Crank arm

Journal

Big end

Small end

7. The specific gravity of petrol is about

0.95

1.25

0.85

0.75

8. The function of a governor in automobiles is to

Limit the power

Maintain constant engine speed

Maximise the fuel economy

Limit the vehicle speed

9. Which of the following oil is more viscous?

SAE 70

SAE 30

SAE 80

SAE 40

10. The commonly used antifreeze solution in automobiles is

Freon-12

Carbon disulphide

Ammonium chloride

Ethylene glycol

Page 2 of 5

11. 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

12. 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 drive shafts are splined to the differential carrier.

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

The differential carrier houses differential pinion gears and side gears; each pinion gear meshes with a different side gear.

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

Trucks

Tractors

Passenger cars

Matadors

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

1.28

1.00

2.81

1.82

15. The parking brake generally acts on

Propeller shaft

Front wheels

Front and rear wheels

Rear wheels

16. The Diesel engines are also known as

Steam engines

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

None of these

17. 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

18. 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

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

Smaller than the positive terminal post

None of these

Larger than the positive terminal post

Of the same size as the positive terminal post

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

Moves the synchronizer

Operates the clutch

Meshes the gears

Selects the synchronizer

Page 3 of 5

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

Incomplete valve closure

Overheating of the engine

None of these

Fouling of spark plug by gasoline

22. Odometer is an instrument used for measurement of

Distance

Fuel consumption

Engine r.p.m.

Power

23. Wheel base of a vehicle is the

Distance between the centres of the front and rear wheels

Distance between the centres of the rear tyres

Extreme length of the vehicle

Distance between the centres of the front tyres

24. The Diesel engine works on

Rankine cycle

Diesel cycle

Carnot cycle

Otto cycle

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

Continually recharges the battery

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

Supply electric power

26. Engine misfiring is likely to result from

Vapours lock in the fuel only

Spark plug gap too wide

Spark plug gap too small

Incorrect fuel air mixture

27. The valve tappet clearance is measured by

Feeler gauge

Screw pitch gauge

Engineering scale

Vernier caliper

28. Cushioning springs in clutch plate reduces

Torsional vibrations

None of these

Vehicle speed

Jerky starts

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

Large particles

Small particles

Sharp edged fragments

None of these

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

5%

20%

15%

10%

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

175

65

82

32. The power source for a brake booster is

Electricity

Exhaust manifold pressure

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

Hydraulic pump

33. 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

34. Bead wires are made of

Aluminium

Zinc

Steel

Copper

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

90

120

100

110

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

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

Maintain directional control

Prevent uneven tyre wear

Compensate for wear in the steering linkage

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

1-3-2-4

1-3-4-2

1-2-4-3

1-2-3-4

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

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

Poor recovery of the steering wheel after making a turn

39. 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

40. The specific gravity of Diesel is about

0.65

0.85

0.75

0.95

Page 5 of 5

41. The ease with which petrol vaporizes is called its

Oxidation

Volatility

Octane number

Cetane number

42. 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

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

Improved power output

Improved fuel efficiency

All of these

Improved emission

44. Tachometer in a vehicle measures

Fuel consumption

Distance

Engine r.p.m.

Speed

45. The effect of having excess camber is

Too much traction

Uneven tyre wear

Hard steering

Excessive steering alignment torque

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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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