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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 ease with which petrol vaporizes is called its

Octane number

Cetane number

Volatility

Oxidation

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

Meshes the gears

Operates the clutch

Moves the synchronizer

Selects the synchronizer

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

The vehicle to pull to the side of lesser inclination

Poor recovery of the steering wheel after making a turn

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

4. The effect of having excess camber is

Uneven tyre wear

Hard steering

Excessive steering alignment torque

Too much traction

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

Gravity

The pressure created by the oil pump

None of these

Splashing action of the crankshaft

6. The valve tappet clearance is measured by

Screw pitch gauge

Vernier caliper

Engineering scale

Feeler gauge

7. Cushioning springs in clutch plate reduces

None of these

Torsional vibrations

Jerky starts

Vehicle speed

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

110

90

100

120

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

Small end

Crank arm

Journal

Big end

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

1.28

1.00

1.82

2.81

Page 2 of 5

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

Maintain directional control

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

Prevent uneven tyre wear

Compensate for wear in the steering linkage

12. The fuel that detonates easily, is

Iso-octane

Alcohol

N-heptane

Benzene

13. Bead wires are made of

Aluminium

Steel

Zinc

Copper

14. The parking brake generally acts on

Front and rear wheels

Propeller shaft

Front wheels

Rear wheels

15. The specific gravity of petrol is about

0.75

0.95

1.25

0.85

16. 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

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

Matadors

Tractors

Trucks

Passenger cars

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

5%

15%

20%

10%

19. Engine misfiring is likely to result from

Incorrect fuel air mixture

Spark plug gap too wide

Vapours lock in the fuel only

Spark plug gap too small

20. The Diesel engines are also known as

Steam engines

Compression ignition (C.I.) engines

None of these

Spark ignition (S.I.) engines

Page 3 of 5

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

Large particles

Sharp edged fragments

Small particles

None of these

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

Improved emission

All of these

Improved power output

Improved fuel efficiency

23. 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

24. Odometer is an instrument used for measurement of

Engine r.p.m.

Fuel consumption

Power

Distance

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

65

82

14

175

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

Of the same size as the positive terminal post

None of these

Larger than the positive terminal post

Smaller than the positive terminal post

27. 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

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

Rapid wearing of the brake pads

Ineffectiveness of the brakes

Judder during braking

Localized wearing of the brake pads

29. Which of the following oil is more viscous?

SAE 80

SAE 30

SAE 70

SAE 40

30. 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 drive shafts are splined to the differential carrier.

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.

Page 4 of 5

31. The brake pedal during ABS operation

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

All of the above

Is pushed upward forcefully

32. The commonly used antifreeze solution in automobiles is

Freon-12

Carbon disulphide

Ethylene glycol

Ammonium chloride

33. The specific gravity of Diesel is about

0.95

0.85

0.65

0.75

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

Belt driven by drive-shaft

Belt driven by crankshaft

Belt driven by camshaft

Chain driven by crankshaft

35. Wheel base of a vehicle is the

Extreme length of the vehicle

Distance between the centres of the front and rear wheels

Distance between the centres of the rear tyres

Distance between the centres of the front tyres

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

Parking light bulb

Stop light bulb

Head light bulb

Ignition warning bulb

37. Tachometer in a vehicle measures

Engine r.p.m.

Fuel consumption

Distance

Speed

38. The Diesel engine works on

Carnot cycle

Rankine cycle

Diesel cycle

Otto cycle

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

1-2-3-4

1-2-4-3

1-3-4-2

1-3-2-4

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)

2 × P.L.A.N

P.L.A.N/4

P.L.A.N/2

P.L.A.N

Page 5 of 5

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

Attach appropriate weights to the wheel at appropriate positions

Adjust the damper spring tension

Adjust the tyre pressure

Rotate the tyres

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

None of these

Exhaust volume

Clearance volume

Cylinder volume

43. The main function of intake manifold is that it

Reduces intake noise

Cools the intake air to a suitable temperature

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

44. The power source for a brake booster is

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

Electricity

Exhaust manifold pressure

Hydraulic pump

45. The function of a governor in automobiles is to

Limit the vehicle speed

Maximise the fuel economy

Limit the power

Maintain constant engine speed

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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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