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

Trucks

Tractors

Passenger cars

Matadors

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

65

14

175

82

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

Moves the synchronizer

Operates the clutch

Meshes the gears

Selects the synchronizer

4. 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.

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

Larger than the positive terminal post

Smaller than the positive terminal post

Of the same size as the positive terminal post

None of these

6. The effect of having excess camber is

Hard steering

Uneven tyre wear

Too much traction

Excessive steering alignment torque

7. Tachometer in a vehicle measures

Speed

Engine r.p.m.

Fuel consumption

Distance

8. The fuel that detonates easily, is

N-heptane

Iso-octane

Benzene

Alcohol

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

90

120

100

110

10. 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

Distance between the centres of the front tyres

Extreme length of the vehicle

Page 2 of 5

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

Improved fuel efficiency

Improved emission

Improved power output

All of these

12. The main function of intake manifold is that it

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

Reduces intake noise

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

Cylinder volume

None of these

Clearance volume

Exhaust volume

14. The ease with which petrol vaporizes is called its

Volatility

Oxidation

Cetane number

Octane number

15. The parking brake generally acts on

Propeller shaft

Rear wheels

Front wheels

Front and rear wheels

16. 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

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

Continually recharges the battery

Converts mechanical energy into electrical energy

Supply electric power

Partly converts engine power into electric power

18. Which of the following oil is more viscous?

SAE 30

SAE 40

SAE 70

SAE 80

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

Attach appropriate weights to the wheel at appropriate positions

Adjust the damper spring tension

Rotate the tyres

Adjust the tyre pressure

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

None of these

Sharp edged fragments

Small particles

Large particles

Page 3 of 5

21. Cushioning springs in clutch plate reduces

Torsional vibrations

Vehicle speed

Jerky starts

None of these

22. 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

P.L.A.N

2 × P.L.A.N

23. The Diesel engine works on

Carnot cycle

Otto cycle

Rankine cycle

Diesel cycle

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

Air-fuel ratio

Exhaust gas volume

Air temperature

Air flow speed

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

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

Maintain directional control

Prevent uneven tyre wear

Compensate for wear in the steering linkage

26. The valve tappet clearance is measured by

Vernier caliper

Screw pitch gauge

Feeler gauge

Engineering scale

27. The function of a governor in automobiles is to

Maintain constant engine speed

Limit the power

Maximise the fuel economy

Limit the vehicle speed

28. The Diesel engines are also known as

Spark ignition (S.I.) engines

None of these

Compression ignition (C.I.) engines

Steam engines

29. Engine misfiring is likely to result from

Vapours lock in the fuel only

Spark plug gap too wide

Spark plug gap too small

Incorrect fuel air mixture

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

Chain driven by crankshaft

Belt driven by camshaft

Belt driven by drive-shaft

Belt driven by crankshaft

Page 4 of 5

31. 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

32. The specific gravity of Diesel is about

0.65

0.85

0.75

0.95

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

Splashing action of the crankshaft

None of these

Gravity

The pressure created by the oil pump

34. The power source for a brake booster is

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

Electricity

Hydraulic pump

Exhaust manifold pressure

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

20%

10%

5%

15%

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

1.82

1.28

1.00

2.81

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

Head light bulb

Ignition warning bulb

Parking light bulb

Stop light bulb

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

Journal

Big end

Small end

Crank arm

39. Odometer is an instrument used for measurement of

Distance

Engine r.p.m.

Power

Fuel consumption

40. The brake pedal during ABS operation

Transmits slight kickback to the driver's foot

Is pushed upward forcefully

All of the above

Pedal stroke becomes longer

Page 5 of 5

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

Tendency to assume toe-out orientation

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

42. Bead wires are made of

Aluminium

Steel

Copper

Zinc

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

Localized wearing of the brake pads

Rapid wearing of the brake pads

Ineffectiveness of the brakes

Judder during braking

44. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Ammonium chloride

Carbon disulphide

Freon-12

45. The specific gravity of petrol is about

0.75

0.85

0.95

1.25

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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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