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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

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

Compensate for wear in the steering linkage

Prevent uneven tyre wear

Maintain directional control

2. The parking brake generally acts on

Front wheels

Front and rear wheels

Rear wheels

Propeller shaft

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

14

82

175

65

4. The Diesel engine works on

Carnot cycle

Rankine cycle

Otto cycle

Diesel cycle

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

Big end

Journal

Small end

Crank arm

6. Tachometer in a vehicle measures

Speed

Distance

Fuel consumption

Engine r.p.m.

7. The fuel that detonates easily, is

N-heptane

Benzene

Alcohol

Iso-octane

8. The power source for a brake booster is

Electricity

Exhaust manifold pressure

Hydraulic pump

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

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

Trucks

Passenger cars

Matadors

Tractors

10. The effect of having excess camber is

Hard steering

Too much traction

Excessive steering alignment torque

Uneven tyre wear

Page 2 of 5

11. The ease with which petrol vaporizes is called its

Octane number

Volatility

Cetane number

Oxidation

12. Bead wires are made of

Aluminium

Zinc

Steel

Copper

13. The brake pedal during ABS operation

Pedal stroke becomes longer

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

All of the above

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

Adjust the tyre pressure

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

15. 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/4

P.L.A.N/2

2 × P.L.A.N

P.L.A.N

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

Ineffectiveness of the brakes

Localized wearing of the brake pads

Judder during braking

Rapid wearing of the brake pads

17. Cushioning springs in clutch plate reduces

None of these

Vehicle speed

Jerky starts

Torsional vibrations

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

Belt driven by crankshaft

Belt driven by drive-shaft

Chain driven by crankshaft

Belt driven by camshaft

19. 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 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 drive shafts are splined to the differential carrier.

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

Poor recovery of the steering wheel after making a turn

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

Page 3 of 5

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

Supply electric power

Continually recharges the battery

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

22. 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

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

20%

10%

15%

5%

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

Operates the clutch

Meshes the gears

Moves the synchronizer

Selects the synchronizer

25. The function of a governor in automobiles is to

Maximise the fuel economy

Limit the power

Maintain constant engine speed

Limit the vehicle speed

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

None of these

Exhaust volume

Cylinder volume

Clearance volume

27. Engine misfiring is likely to result from

Spark plug gap too small

Spark plug gap too wide

Incorrect fuel air mixture

Vapours lock in the fuel only

28. 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

Extreme length of the vehicle

Distance between the centres of the rear tyres

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

1-2-4-3

1-3-4-2

1-2-3-4

1-3-2-4

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

Ignition warning bulb

Head light bulb

Parking light bulb

Stop light bulb

Page 4 of 5

31. The specific gravity of petrol is about

1.25

0.95

0.75

0.85

32. The Diesel engines are also known as

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

Steam engines

None of these

33. The specific gravity of Diesel is about

0.75

0.85

0.95

0.65

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

1.00

1.28

1.82

2.81

35. Which of the following oil is more viscous?

SAE 70

SAE 40

SAE 80

SAE 30

36. Odometer is an instrument used for measurement of

Engine r.p.m.

Distance

Fuel consumption

Power

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

Incomplete valve closure

Fouling of spark plug by gasoline

Overheating of the engine

None of these

38. The valve tappet clearance is measured by

Vernier caliper

Engineering scale

Feeler gauge

Screw pitch gauge

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

None of these

The pressure created by the oil pump

Gravity

Splashing action of the crankshaft

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

110

90

120

100

Page 5 of 5

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

Sharp edged fragments

Large particles

Small particles

None of these

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

Air temperature

Air flow speed

Air-fuel ratio

Exhaust gas volume

43. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Freon-12

Ammonium chloride

Carbon disulphide

44. 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

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

All of these

Improved emission

Improved fuel efficiency

Improved power output

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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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