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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

Maintain directional control

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

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

Improved power output

Improved emission

Improved fuel efficiency

All of these

3. Cushioning springs in clutch plate reduces

Jerky starts

Torsional vibrations

None of these

Vehicle speed

4. Odometer is an instrument used for measurement of

Engine r.p.m.

Power

Distance

Fuel consumption

5. The specific gravity of petrol is about

0.75

1.25

0.95

0.85

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

Trucks

Matadors

Passenger cars

Tractors

7. Which of the following oil is more viscous?

SAE 80

SAE 30

SAE 70

SAE 40

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

2.81

1.82

1.28

1.00

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

120

110

90

100

10. The valve tappet clearance is measured by

Screw pitch gauge

Feeler gauge

Engineering scale

Vernier caliper

Page 2 of 5

11. The specific gravity of Diesel is about

0.75

0.85

0.95

0.65

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

Small particles

Large particles

None of these

Sharp edged fragments

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

Partly converts engine power into electric power

Continually recharges the battery

Supply electric power

Converts mechanical energy into electrical energy

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

Moves the synchronizer

Selects the synchronizer

Meshes the gears

Operates the clutch

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

1-3-2-4

1-2-3-4

1-3-4-2

1-2-4-3

16. 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

17. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Carbon disulphide

Freon-12

Ammonium chloride

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

65

14

82

175

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

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

Adjust the damper spring tension

Rotate the tyres

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

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

Poor recovery of the steering wheel after making a turn

Page 3 of 5

21. The parking brake generally acts on

Rear wheels

Front and rear wheels

Propeller shaft

Front wheels

22. Engine misfiring is likely to result from

Spark plug gap too wide

Spark plug gap too small

Vapours lock in the fuel only

Incorrect fuel air mixture

23. Wheel base of a vehicle is the

Distance between the centres of the front tyres

Extreme length of the vehicle

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

24. 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

2 × P.L.A.N

P.L.A.N/2

P.L.A.N

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

Belt driven by crankshaft

Belt driven by drive-shaft

Belt driven by camshaft

Chain driven by crankshaft

26. The function of a governor in automobiles is to

Limit the vehicle speed

Limit the power

Maximise the fuel economy

Maintain constant engine speed

27. The Diesel engine works on

Diesel cycle

Otto cycle

Carnot cycle

Rankine cycle

28. 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

29. Tachometer in a vehicle measures

Engine r.p.m.

Speed

Distance

Fuel consumption

30. 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

Page 4 of 5

31. The effect of having excess camber is

Hard steering

Excessive steering alignment torque

Uneven tyre wear

Too much traction

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

Crank arm

Journal

Big end

Small end

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

The pressure created by the oil pump

None of these

Splashing action of the crankshaft

Gravity

34. Bead wires are made of

Zinc

Steel

Aluminium

Copper

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

Parking light bulb

Ignition warning bulb

Stop light bulb

Head light bulb

36. The fuel that detonates easily, is

Benzene

N-heptane

Alcohol

Iso-octane

37. The Diesel engines are also known as

Steam engines

Compression ignition (C.I.) engines

None of these

Spark ignition (S.I.) engines

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

Air flow speed

Exhaust gas volume

Air-fuel ratio

Air temperature

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

Ineffectiveness of the brakes

Rapid wearing of the brake pads

Judder during braking

Localized wearing of the brake pads

40. The ease with which petrol vaporizes is called its

Volatility

Octane number

Oxidation

Cetane number

Page 5 of 5

41. 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; 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.

The drive shafts are splined to the differential carrier.

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

None of these

Of the same size as the positive terminal post

Larger than the positive terminal post

Smaller than the positive terminal post

43. The main function of intake manifold is that it

Reduces intake noise

Promotes the mixture of air and fuel

Cools the intake air to a suitable temperature

Distributes intake air equally to the cylinders

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

10%

15%

20%

5%

45. 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

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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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