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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 effect of having excess camber is

Excessive steering alignment torque

Too much traction

Uneven tyre wear

Hard steering

2. The ease with which petrol vaporizes is called its

Volatility

Cetane number

Oxidation

Octane number

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

120

100

110

90

4. 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

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

Larger than the positive terminal post

Of the same size as the positive terminal post

None of these

Smaller than the positive terminal post

6. Tachometer in a vehicle measures

Fuel consumption

Speed

Engine r.p.m.

Distance

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

Matadors

Trucks

Passenger cars

Tractors

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

Ignition warning bulb

Head light bulb

Stop light bulb

Parking light bulb

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

Sharp edged fragments

Large particles

Small particles

None of these

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

Rapid wearing of the brake pads

Judder during braking

Ineffectiveness of the brakes

Localized wearing of the brake pads

Page 2 of 5

11. Which of the following oil is more viscous?

SAE 80

SAE 30

SAE 40

SAE 70

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

Splashing action of the crankshaft

Gravity

None of these

The pressure created by the oil pump

13. Engine misfiring is likely to result from

Vapours lock in the fuel only

Spark plug gap too small

Incorrect fuel air mixture

Spark plug gap too wide

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

1-2-4-3

1-3-2-4

1-3-4-2

1-2-3-4

15. The brake pedal during ABS operation

Is pushed upward forcefully

All of the above

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

16. 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

17. 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/4

2 × P.L.A.N

P.L.A.N

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

Journal

Small end

Big end

Crank arm

19. Wheel base of a vehicle is the

Distance between the centres of the front tyres

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

Extreme length of the vehicle

20. Cushioning springs in clutch plate reduces

Jerky starts

Torsional vibrations

Vehicle speed

None of these

Page 3 of 5

21. The Diesel engines are also known as

None of these

Compression ignition (C.I.) engines

Steam engines

Spark ignition (S.I.) engines

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

Supply electric power

Continually recharges the battery

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

23. The fuel that detonates easily, is

Alcohol

N-heptane

Benzene

Iso-octane

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

2.81

1.28

1.00

1.82

25. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Freon-12

Ammonium chloride

Carbon disulphide

26. The specific gravity of Diesel is about

0.95

0.85

0.75

0.65

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

Improved power output

Improved fuel efficiency

Improved emission

All of these

28. Odometer is an instrument used for measurement of

Power

Distance

Engine r.p.m.

Fuel consumption

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

Fouling of spark plug by gasoline

Incomplete valve closure

Overheating of the engine

None of these

30. The function of a governor in automobiles is to

Maintain constant engine speed

Limit the power

Maximise the fuel economy

Limit the vehicle speed

Page 4 of 5

31. The specific gravity of petrol is about

0.75

0.95

1.25

0.85

32. The parking brake generally acts on

Rear wheels

Front wheels

Propeller shaft

Front and rear wheels

33. 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

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

Belt driven by drive-shaft

Chain driven by crankshaft

Belt driven by camshaft

Belt driven by crankshaft

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

15%

10%

5%

20%

36. 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

37. The main function of intake manifold is that it

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

Reduces intake noise

Cools the intake air to a suitable temperature

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

Air temperature

Air-fuel ratio

Air flow speed

Exhaust gas volume

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

Operates the clutch

Selects the synchronizer

Moves the synchronizer

Meshes the gears

40. 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.

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.

Page 5 of 5

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

Compensate for wear in the steering linkage

Prevent uneven tyre wear

Maintain directional control

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

42. The valve tappet clearance is measured by

Feeler gauge

Engineering scale

Vernier caliper

Screw pitch gauge

43. Bead wires are made of

Zinc

Steel

Aluminium

Copper

44. The Diesel engine works on

Carnot cycle

Otto cycle

Rankine cycle

Diesel cycle

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

175

65

82

14

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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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