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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. 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

2. The commonly used antifreeze solution in automobiles is

Freon-12

Carbon disulphide

Ethylene glycol

Ammonium chloride

3. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

Reduces intake noise

Cools the intake air to a suitable temperature

4. The power source for a brake booster is

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

Exhaust manifold pressure

Electricity

Hydraulic pump

5. Odometer is an instrument used for measurement of

Engine r.p.m.

Fuel consumption

Distance

Power

6. The effect of having excess camber is

Excessive steering alignment torque

Hard steering

Too much traction

Uneven tyre wear

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

Trucks

Matadors

Passenger cars

Tractors

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

Partly converts engine power into electric power

Continually recharges the battery

Converts mechanical energy into electrical energy

Supply electric power

9. The valve tappet clearance is measured by

Screw pitch gauge

Feeler gauge

Engineering scale

Vernier caliper

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

Smaller than the positive terminal post

None of these

Larger than the positive terminal post

Of the same size as the positive terminal post

Page 2 of 5

11. The fuel that detonates easily, is

N-heptane

Benzene

Alcohol

Iso-octane

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

Improved power output

Improved fuel efficiency

Improved emission

All of these

13. 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 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 left side gear and the differential carrier rotate in constant unison.

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

1.28

1.00

2.81

1.82

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

None of these

Sharp edged fragments

Large particles

Small particles

16. 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 crankshaft

Belt driven by drive-shaft

17. The specific gravity of petrol is about

0.75

0.85

1.25

0.95

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

Prevent uneven tyre wear

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

Compensate for wear in the steering linkage

Maintain directional control

19. 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

20. Engine misfiring is likely to result from

Vapours lock in the fuel only

Incorrect fuel air mixture

Spark plug gap too small

Spark plug gap too wide

Page 3 of 5

21. The function of a governor in automobiles is to

Limit the vehicle speed

Limit the power

Maintain constant engine speed

Maximise the fuel economy

22. The parking brake generally acts on

Propeller shaft

Rear wheels

Front wheels

Front and rear wheels

23. Which of the following oil is more viscous?

SAE 70

SAE 30

SAE 40

SAE 80

24. The specific gravity of Diesel is about

0.95

0.65

0.85

0.75

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

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

26. 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

Localized wearing of the brake pads

Judder during braking

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

Meshes the gears

Selects the synchronizer

Moves the synchronizer

Operates the clutch

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

175

82

65

14

29. The Diesel engine works on

Carnot cycle

Rankine cycle

Otto cycle

Diesel cycle

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

1-3-4-2

1-2-4-3

1-3-2-4

1-2-3-4

Page 4 of 5

31. Cushioning springs in clutch plate reduces

Vehicle speed

Jerky starts

None of these

Torsional vibrations

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

Exhaust gas volume

Air temperature

Air-fuel ratio

Air flow speed

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

Journal

Big end

Small end

Crank arm

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

Gravity

Splashing action of the crankshaft

None of these

The pressure created by the oil pump

35. The Diesel engines are also known as

None of these

Spark ignition (S.I.) engines

Steam engines

Compression ignition (C.I.) engines

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

20%

10%

5%

15%

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

Exhaust volume

Cylinder volume

Clearance volume

None of these

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

110

100

120

90

39. The brake pedal during ABS operation

All of the above

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

40. Tachometer in a vehicle measures

Fuel consumption

Speed

Distance

Engine r.p.m.

Page 5 of 5

41. 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

2 × P.L.A.N

P.L.A.N/4

P.L.A.N

42. Bead wires are made of

Copper

Zinc

Aluminium

Steel

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

Rotate the tyres

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

Adjust the damper spring tension

44. The ease with which petrol vaporizes is called its

Oxidation

Octane number

Volatility

Cetane number

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

Incomplete valve closure

None of these

Overheating of the engine

Fouling of spark plug by gasoline

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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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