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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 bulb in a car will have the least wattage?

Head light bulb

Ignition warning bulb

Stop light bulb

Parking light bulb

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

Maintain directional control

Prevent uneven tyre wear

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

Compensate for wear in the steering linkage

3. 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

4. The specific gravity of Diesel is about

0.95

0.75

0.85

0.65

5. The brake pedal during ABS operation

Pedal stroke becomes longer

All of the above

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

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

20%

10%

5%

15%

7. 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

8. Engine misfiring is likely to result from

Spark plug gap too wide

Vapours lock in the fuel only

Incorrect fuel air mixture

Spark plug gap too small

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

Generation of a braking effect at tight corners

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

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

Exhaust gas volume

Air-fuel ratio

Air flow speed

Air temperature

Page 2 of 5

11. Odometer is an instrument used for measurement of

Fuel consumption

Engine r.p.m.

Distance

Power

12. Tachometer in a vehicle measures

Engine r.p.m.

Fuel consumption

Speed

Distance

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

82

14

175

65

14. The specific gravity of petrol is about

1.25

0.95

0.85

0.75

15. The valve tappet clearance is measured by

Engineering scale

Vernier caliper

Feeler gauge

Screw pitch gauge

16. The power source for a brake booster is

Hydraulic pump

Electricity

Exhaust manifold pressure

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

17. Bead wires are made of

Copper

Zinc

Aluminium

Steel

18. The main function of intake manifold is that it

Reduces intake noise

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

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

None of these

Cylinder volume

Exhaust volume

Clearance volume

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

Big end

Journal

Small end

Crank arm

Page 3 of 5

21. The Diesel engine works on

Otto cycle

Rankine cycle

Carnot cycle

Diesel cycle

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

Small particles

None of these

Large particles

Sharp edged fragments

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

Continually recharges the battery

Partly converts engine power into electric power

Supply electric power

Converts mechanical energy into electrical energy

24. The fuel that detonates easily, is

Benzene

N-heptane

Iso-octane

Alcohol

25. The function of a governor in automobiles is to

Limit the vehicle speed

Maximise the fuel economy

Maintain constant engine speed

Limit the power

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

Improved fuel efficiency

Improved power output

All of these

Improved emission

27. Cushioning springs in clutch plate reduces

Jerky starts

Vehicle speed

None of these

Torsional vibrations

28. Wheel base of a vehicle is the

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

Extreme length of the vehicle

Distance between the centres of the front tyres

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

None of these

Overheating of the engine

Incomplete valve closure

Fouling of spark plug by gasoline

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

Larger than the positive terminal post

Smaller than the positive terminal post

None of these

Of the same size as the positive terminal post

Page 4 of 5

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

90

110

120

100

32. The parking brake generally acts on

Rear wheels

Front wheels

Propeller shaft

Front and rear wheels

33. The ease with which petrol vaporizes is called its

Octane number

Oxidation

Cetane number

Volatility

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

1-3-4-2

1-2-3-4

1-2-4-3

1-3-2-4

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

2.81

1.28

1.00

1.82

36. 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 × P.L.A.N

P.L.A.N/4

P.L.A.N/2

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

Belt driven by crankshaft

Chain driven by crankshaft

Belt driven by drive-shaft

Belt driven by camshaft

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

Passenger cars

Tractors

Matadors

Trucks

39. Which of the following oil is more viscous?

SAE 30

SAE 80

SAE 40

SAE 70

40. The effect of having excess camber is

Too much traction

Hard steering

Excessive steering alignment torque

Uneven tyre wear

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.

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.

42. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Ethylene glycol

Carbon disulphide

Freon-12

43. The Diesel engines are also known as

None of these

Compression ignition (C.I.) engines

Steam engines

Spark ignition (S.I.) engines

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

Gravity

Splashing action of the crankshaft

None of these

The pressure created by the oil pump

45. 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

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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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