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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 basic purpose of providing caster angle on wheels is to

Prevent uneven tyre wear

Compensate for wear in the steering linkage

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

Maintain directional control

2. The specific gravity of petrol is about

1.25

0.75

0.85

0.95

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

Exhaust volume

None of these

Clearance volume

Cylinder volume

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

The drive shafts are splined to the differential carrier.

The differential carrier houses differential pinion gears and side gears.

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

Air temperature

Air flow speed

Exhaust gas volume

Air-fuel ratio

6. The ease with which petrol vaporizes is called its

Oxidation

Volatility

Cetane number

Octane number

7. Cushioning springs in clutch plate reduces

None of these

Jerky starts

Torsional vibrations

Vehicle speed

8. The fuel that detonates easily, is

Iso-octane

N-heptane

Alcohol

Benzene

9. The valve tappet clearance is measured by

Engineering scale

Vernier caliper

Screw pitch gauge

Feeler gauge

10. The function of a governor in automobiles is to

Maximise the fuel economy

Limit the power

Limit the vehicle speed

Maintain constant engine speed

Page 2 of 5

11. Odometer is an instrument used for measurement of

Fuel consumption

Engine r.p.m.

Distance

Power

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

Ignition warning bulb

Stop light bulb

Head light bulb

Parking light bulb

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

Large particles

Sharp edged fragments

None of these

Small particles

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

175

65

14

82

15. 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 crankshaft

Belt driven by camshaft

16. Which of the following oil is more viscous?

SAE 80

SAE 70

SAE 30

SAE 40

17. The brake pedal during ABS operation

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

All of the above

Pedal stroke becomes longer

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

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

Adjust the damper spring tension

19. Tachometer in a vehicle measures

Distance

Speed

Fuel consumption

Engine r.p.m.

20. The Diesel engine works on

Otto cycle

Rankine cycle

Carnot cycle

Diesel cycle

Page 3 of 5

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

Passenger cars

Tractors

Trucks

Matadors

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

15%

10%

5%

20%

23. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Distributes intake air equally to the cylinders

Reduces intake noise

Promotes the mixture of air and fuel

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

Continually recharges the battery

Supply electric power

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

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

110

120

90

100

26. 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

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

1-2-3-4

1-3-4-2

1-2-4-3

1-3-2-4

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

1.82

1.00

1.28

2.81

29. The specific gravity of Diesel is about

0.75

0.95

0.65

0.85

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

Operates the clutch

Moves the synchronizer

Selects the synchronizer

Meshes the gears

Page 4 of 5

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

Rapid wearing of the brake pads

Judder during braking

Localized wearing of the brake pads

Ineffectiveness of the brakes

32. The parking brake generally acts on

Front and rear wheels

Front wheels

Propeller shaft

Rear wheels

33. The effect of having excess camber is

Excessive steering alignment torque

Too much traction

Hard steering

Uneven tyre wear

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

None of these

Gravity

The pressure created by the oil pump

Splashing action of the crankshaft

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

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

Poor recovery of the steering wheel after making a turn

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

None of these

Of the same size as the positive terminal post

Smaller than the positive terminal post

Larger than the positive terminal post

37. The Diesel engines are also known as

None of these

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

Steam engines

38. Bead wires are made of

Copper

Aluminium

Zinc

Steel

39. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Freon-12

Ammonium chloride

Carbon disulphide

40. 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

Page 5 of 5

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

Journal

Small end

Big end

Crank arm

42. Engine misfiring is likely to result from

Spark plug gap too wide

Incorrect fuel air mixture

Vapours lock in the fuel only

Spark plug gap too small

43. The power source for a brake booster is

Hydraulic pump

Electricity

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

Exhaust manifold pressure

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

Overheating of the engine

None of these

Incomplete valve closure

Fouling of spark plug by gasoline

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

Improved power output

Improved emission

All of these

Improved fuel efficiency

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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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