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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

Matadors

Trucks

Tractors

Passenger cars

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

None of these

Incomplete valve closure

Fouling of spark plug by gasoline

Overheating of the engine

3. 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

4. The effect of having excess camber is

Excessive steering alignment torque

Too much traction

Uneven tyre wear

Hard steering

5. The Diesel engine works on

Rankine cycle

Otto cycle

Diesel cycle

Carnot cycle

6. 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

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

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

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

Adjust the damper spring tension

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

100

120

90

110

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

Localized wearing of the brake pads

Ineffectiveness of the brakes

Rapid wearing of the brake pads

Judder during braking

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

1-2-3-4

1-3-4-2

1-3-2-4

1-2-4-3

Page 2 of 5

11. The valve tappet clearance is measured by

Vernier caliper

Feeler gauge

Screw pitch gauge

Engineering scale

12. The power source for a brake booster is

Electricity

Hydraulic pump

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

Exhaust manifold pressure

13. The fuel that detonates easily, is

N-heptane

Benzene

Alcohol

Iso-octane

14. The Diesel engines are also known as

Compression ignition (C.I.) engines

Steam engines

Spark ignition (S.I.) engines

None of these

15. 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

2 × P.L.A.N

16. 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

17. Odometer is an instrument used for measurement of

Power

Distance

Fuel consumption

Engine r.p.m.

18. 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

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

20%

5%

15%

10%

20. 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

Page 3 of 5

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

Improved fuel efficiency

Improved power output

All of these

Improved emission

22. Tachometer in a vehicle measures

Distance

Fuel consumption

Speed

Engine r.p.m.

23. Bead wires are made of

Zinc

Steel

Aluminium

Copper

24. The specific gravity of petrol is about

1.25

0.95

0.85

0.75

25. The brake pedal during ABS operation

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

All of the above

Pedal stroke becomes longer

26. Engine misfiring is likely to result from

Incorrect fuel air mixture

Spark plug gap too small

Spark plug gap too wide

Vapours lock in the fuel only

27. 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

28. The ease with which petrol vaporizes is called its

Cetane number

Octane number

Volatility

Oxidation

29. 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 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.

30. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Carbon disulphide

Freon-12

Ammonium chloride

Page 4 of 5

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

65

175

82

14

32. The parking brake generally acts on

Rear wheels

Propeller shaft

Front wheels

Front and rear wheels

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

Head light bulb

Stop light bulb

Parking light bulb

Ignition warning bulb

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

Clearance volume

None of these

Exhaust volume

Cylinder volume

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

Air-fuel ratio

Exhaust gas volume

Air flow speed

Air temperature

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

1.82

1.28

2.81

1.00

37. 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

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

Journal

Small end

Crank arm

Big end

39. The specific gravity of Diesel is about

0.95

0.85

0.65

0.75

40. Cushioning springs in clutch plate reduces

Jerky starts

Vehicle speed

None of these

Torsional vibrations

Page 5 of 5

41. Which of the following oil is more viscous?

SAE 80

SAE 70

SAE 40

SAE 30

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

Continually recharges the battery

Supply electric power

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

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

Small particles

Large particles

Sharp edged fragments

None of these

44. The function of a governor in automobiles is to

Limit the power

Limit the vehicle speed

Maximise the fuel economy

Maintain constant engine speed

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

Of the same size as the positive terminal post

None of these

Smaller than the positive terminal post

Larger than the positive terminal post

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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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