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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 parking brake generally acts on

Rear wheels

Propeller shaft

Front and rear wheels

Front wheels

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

Sharp edged fragments

Large particles

None of these

Small particles

3. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Freon-12

Ammonium chloride

Carbon disulphide

4. The brake pedal during ABS operation

Pedal stroke becomes longer

Is pushed upward forcefully

All of the above

Transmits slight kickback to the driver's foot

5. 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

6. The Diesel engines are also known as

Spark ignition (S.I.) engines

Steam engines

Compression ignition (C.I.) engines

None of these

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

Supply electric power

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

Continually recharges the battery

8. Engine misfiring is likely to result from

Vapours lock in the fuel only

Spark plug gap too small

Incorrect fuel air mixture

Spark plug gap too wide

9. The function of a governor in automobiles is to

Limit the power

Limit the vehicle speed

Maintain constant engine speed

Maximise the fuel economy

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

None of these

Splashing action of the crankshaft

The pressure created by the oil pump

Gravity

Page 2 of 5

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

Adjust the damper spring tension

Rotate the tyres

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

12. The ease with which petrol vaporizes is called its

Oxidation

Volatility

Octane number

Cetane number

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

Big end

Crank arm

Small end

Journal

14. The specific gravity of Diesel is about

0.65

0.85

0.75

0.95

15. Which of the following oil is more viscous?

SAE 30

SAE 40

SAE 80

SAE 70

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

65

82

175

14

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

Head light bulb

Parking light bulb

Stop light bulb

Ignition warning bulb

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

Larger than the positive terminal post

Smaller than the positive terminal post

None of these

Of the same size as the positive terminal post

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

Rapid wearing of the brake pads

Judder during braking

Ineffectiveness of the brakes

Localized wearing of the brake pads

20. Cushioning springs in clutch plate reduces

Torsional vibrations

Jerky starts

Vehicle speed

None of these

Page 3 of 5

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

Tractors

Passenger cars

Trucks

Matadors

22. Tachometer in a vehicle measures

Engine r.p.m.

Distance

Speed

Fuel consumption

23. Which one of the following statement correctly describes the construction of a bevel gear type differential?

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.

The differential carrier houses differential pinion gears and side gears.

24. Wheel base of a vehicle is the

Distance between the centres of the front and rear wheels

Extreme length of the vehicle

Distance between the centres of the rear tyres

Distance between the centres of the front tyres

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

Poor recovery of the steering wheel after making a turn

Generation of a braking effect at tight corners

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

26. The specific gravity of petrol is about

0.95

0.85

1.25

0.75

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

Improved power output

All of these

Improved fuel efficiency

Improved emission

28. The effect of having excess camber is

Excessive steering alignment torque

Too much traction

Hard steering

Uneven tyre wear

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

2.81

1.82

1.28

1.00

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

1-2-4-3

1-3-2-4

1-2-3-4

1-3-4-2

Page 4 of 5

31. 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

32. Odometer is an instrument used for measurement of

Engine r.p.m.

Distance

Fuel consumption

Power

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

Belt driven by drive-shaft

Belt driven by camshaft

Chain driven by crankshaft

Belt driven by crankshaft

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

5%

20%

10%

15%

35. Bead wires are made of

Aluminium

Steel

Copper

Zinc

36. The valve tappet clearance is measured by

Screw pitch gauge

Feeler gauge

Engineering scale

Vernier caliper

37. 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

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

Compensate for wear in the steering linkage

Prevent uneven tyre wear

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

Maintain directional control

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

Cylinder volume

Exhaust volume

Clearance volume

None of these

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

Moves the synchronizer

Selects the synchronizer

Operates the clutch

Meshes the gears

Page 5 of 5

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

Fouling of spark plug by gasoline

None of these

Incomplete valve closure

Overheating of the engine

42. The fuel that detonates easily, is

Iso-octane

N-heptane

Alcohol

Benzene

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

120

100

90

110

44. The Diesel engine works on

Rankine cycle

Carnot cycle

Otto cycle

Diesel cycle

45. The power source for a brake booster is

Exhaust manifold pressure

Electricity

Hydraulic pump

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

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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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