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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 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

2. The ease with which petrol vaporizes is called its

Volatility

Octane number

Oxidation

Cetane number

3. The Diesel engines are also known as

Steam engines

Spark ignition (S.I.) engines

None of these

Compression ignition (C.I.) engines

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

1-3-2-4

1-3-4-2

1-2-3-4

1-2-4-3

5. 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

Judder during braking

Ineffectiveness of the brakes

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

None of these

Exhaust volume

Cylinder volume

Clearance volume

7. The specific gravity of petrol is about

0.95

1.25

0.75

0.85

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

Selects the synchronizer

Meshes the gears

Operates the clutch

Moves the synchronizer

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

Parking light bulb

Ignition warning bulb

Head light bulb

Stop light bulb

10. The effect of having excess camber is

Excessive steering alignment torque

Hard steering

Uneven tyre wear

Too much traction

Page 2 of 5

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

14

82

175

65

12. Tachometer in a vehicle measures

Speed

Distance

Engine r.p.m.

Fuel consumption

13. Wheel base of a vehicle is the

Distance between the centres of the front tyres

Extreme length of the vehicle

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

14. 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

15. Bead wires are made of

Copper

Steel

Aluminium

Zinc

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

5%

15%

10%

20%

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

Tractors

Trucks

Matadors

Passenger cars

18. Engine misfiring is likely to result from

Spark plug gap too small

Spark plug gap too wide

Incorrect fuel air mixture

Vapours lock in the fuel only

19. Odometer is an instrument used for measurement of

Engine r.p.m.

Fuel consumption

Power

Distance

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

90

100

120

110

Page 3 of 5

21. The commonly used antifreeze solution in automobiles is

Freon-12

Ammonium chloride

Ethylene glycol

Carbon disulphide

22. The fuel that detonates easily, is

Alcohol

N-heptane

Iso-octane

Benzene

23. The function of a governor in automobiles is to

Limit the vehicle speed

Maximise the fuel economy

Limit the power

Maintain constant engine speed

24. 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

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

Adjust the tyre pressure

Adjust the damper spring tension

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

26. The parking brake generally acts on

Rear wheels

Propeller shaft

Front and rear wheels

Front wheels

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

Small end

Big end

Crank arm

Journal

28. 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

29. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Reduces intake noise

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

30. 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

Page 4 of 5

31. 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

32. The specific gravity of Diesel is about

0.95

0.85

0.75

0.65

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

Large particles

None of these

Sharp edged fragments

Small particles

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

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

Poor recovery of the steering wheel after making a turn

Generation of a braking effect at tight corners

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

Prevent uneven tyre wear

Compensate for wear in the steering linkage

Maintain directional control

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

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

Improved emission

Improved fuel efficiency

Improved power output

All of these

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

Converts mechanical energy into electrical energy

Continually recharges the battery

Supply electric power

Partly converts engine power into electric power

38. Cushioning springs in clutch plate reduces

Vehicle speed

None of these

Jerky starts

Torsional vibrations

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

Exhaust gas volume

Air-fuel ratio

Air temperature

Air flow speed

40. The Diesel engine works on

Carnot cycle

Otto cycle

Rankine cycle

Diesel cycle

Page 5 of 5

41. 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

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

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.

43. The valve tappet clearance is measured by

Screw pitch gauge

Vernier caliper

Feeler gauge

Engineering scale

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

1.28

2.81

1.82

1.00

45. Which of the following oil is more viscous?

SAE 80

SAE 40

SAE 30

SAE 70

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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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