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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. Cushioning springs in clutch plate reduces

Torsional vibrations

Jerky starts

None of these

Vehicle speed

2. 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

3. The Diesel engine works on

Diesel cycle

Carnot cycle

Rankine cycle

Otto cycle

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

Parking light bulb

Stop light bulb

Ignition warning bulb

Head light bulb

5. Tachometer in a vehicle measures

Distance

Fuel consumption

Engine r.p.m.

Speed

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

Poor recovery of the steering wheel after making a turn

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

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

Small particles

Large particles

Sharp edged fragments

None of these

8. Odometer is an instrument used for measurement of

Fuel consumption

Engine r.p.m.

Distance

Power

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

5%

10%

15%

20%

10. The main function of intake manifold is that it

Promotes the mixture of air and fuel

Cools the intake air to a suitable temperature

Distributes intake air equally to the cylinders

Reduces intake noise

Page 2 of 5

11. Which of the following oil is more viscous?

SAE 80

SAE 30

SAE 70

SAE 40

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

82

65

14

175

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

Overheating of the engine

Fouling of spark plug by gasoline

Incomplete valve closure

None of these

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

Cylinder volume

Clearance volume

None of these

Exhaust volume

15. The specific gravity of petrol is about

0.85

0.95

1.25

0.75

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

1.00

1.82

1.28

2.81

17. The effect of having excess camber is

Uneven tyre wear

Too much traction

Hard steering

Excessive steering alignment torque

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

Air flow speed

Exhaust gas volume

Air temperature

Air-fuel ratio

19. 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; each pinion gear meshes with a different side gear.

The drive shafts are splined to the differential carrier.

The differential carrier houses differential pinion gears and side gears.

20. The commonly used antifreeze solution in automobiles is

Freon-12

Ethylene glycol

Ammonium chloride

Carbon disulphide

Page 3 of 5

21. The fuel that detonates easily, is

N-heptane

Alcohol

Benzene

Iso-octane

22. Wheel base of a vehicle is the

Distance between the centres of the front tyres

Distance between the centres of the rear tyres

Extreme length of the vehicle

Distance between the centres of the front and rear wheels

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

1-3-2-4

1-2-3-4

1-2-4-3

1-3-4-2

24. 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

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

None of these

Of the same size as the positive terminal post

Larger than the positive terminal post

Smaller than the positive terminal post

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

Trucks

Tractors

Matadors

Passenger cars

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

90

100

110

120

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

Big end

Small end

Crank arm

Journal

29. 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

Compensate for wear in the steering linkage

Prevent uneven tyre wear

30. The valve tappet clearance is measured by

Feeler gauge

Engineering scale

Screw pitch gauge

Vernier caliper

Page 4 of 5

31. The function of a governor in automobiles is to

Maximise the fuel economy

Maintain constant engine speed

Limit the power

Limit the vehicle speed

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

Supply electric power

Converts mechanical energy into electrical energy

Continually recharges the battery

Partly converts engine power into electric power

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

None of these

Splashing action of the crankshaft

Gravity

The pressure created by the oil pump

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

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

Adjust the damper spring tension

Adjust the tyre pressure

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

Improved fuel efficiency

Improved power output

All of these

Improved emission

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

Belt driven by camshaft

Chain driven by crankshaft

Belt driven by drive-shaft

Belt driven by crankshaft

37. The parking brake generally acts on

Rear wheels

Front wheels

Front and rear wheels

Propeller shaft

38. The specific gravity of Diesel is about

0.75

0.85

0.65

0.95

39. The power source for a brake booster is

Hydraulic pump

Exhaust manifold pressure

Electricity

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

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

P.L.A.N/4

P.L.A.N/2

Page 5 of 5

41. The ease with which petrol vaporizes is called its

Octane number

Oxidation

Volatility

Cetane number

42. Bead wires are made of

Aluminium

Zinc

Copper

Steel

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

Operates the clutch

Meshes the gears

Selects the synchronizer

Moves the synchronizer

44. The Diesel engines are also known as

Spark ignition (S.I.) engines

Steam engines

None of these

Compression ignition (C.I.) engines

45. 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

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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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