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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 fuel that detonates easily, is

N-heptane

Alcohol

Benzene

Iso-octane

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

Stop light bulb

Parking light bulb

Head light bulb

Ignition warning bulb

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

Meshes the gears

Selects the synchronizer

Operates the clutch

Moves the synchronizer

4. The Diesel engines are also known as

Steam engines

None of these

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

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

Poor recovery of the steering wheel after making a turn

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

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

Continually recharges the battery

Supply electric power

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

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

Improved emission

Improved fuel efficiency

All of these

Improved power output

8. The specific gravity of Diesel is about

0.85

0.75

0.95

0.65

9. 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

10. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Carbon disulphide

Ammonium chloride

Freon-12

Page 2 of 5

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

1.00

1.82

1.28

2.81

12. 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 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.

13. Which of the following oil is more viscous?

SAE 30

SAE 40

SAE 70

SAE 80

14. The Diesel engine works on

Rankine cycle

Carnot cycle

Otto cycle

Diesel cycle

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

Rapid wearing of the brake pads

Ineffectiveness of the brakes

Judder during braking

Localized wearing of the brake pads

16. The effect of having excess camber is

Uneven tyre wear

Hard steering

Too much traction

Excessive steering alignment torque

17. The function of a governor in automobiles is to

Maintain constant engine speed

Limit the power

Maximise the fuel economy

Limit the vehicle speed

18. Bead wires are made of

Zinc

Steel

Aluminium

Copper

19. 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

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

Passenger cars

Matadors

Tractors

Trucks

Page 3 of 5

21. Odometer is an instrument used for measurement of

Power

Distance

Fuel consumption

Engine r.p.m.

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

Air flow speed

Air-fuel ratio

Air temperature

Exhaust gas volume

23. The valve tappet clearance is measured by

Engineering scale

Vernier caliper

Screw pitch gauge

Feeler gauge

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

The pressure created by the oil pump

None of these

Gravity

Splashing action of the crankshaft

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

90

100

110

120

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

Crank arm

Journal

Small end

Big end

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

1-2-3-4

1-3-4-2

1-2-4-3

1-3-2-4

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

15%

20%

10%

5%

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

Smaller than the positive terminal post

Larger than the positive terminal post

None of these

Of the same size as the positive terminal post

30. Tachometer in a vehicle measures

Fuel consumption

Engine r.p.m.

Distance

Speed

Page 4 of 5

31. 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

32. 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

33. The parking brake generally acts on

Propeller shaft

Front wheels

Rear wheels

Front and rear wheels

34. 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

35. Cushioning springs in clutch plate reduces

Vehicle speed

Jerky starts

None of these

Torsional vibrations

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

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

Prevent uneven tyre wear

Compensate for wear in the steering linkage

Maintain directional control

37. The specific gravity of petrol is about

1.25

0.85

0.75

0.95

38. 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

39. The brake pedal during ABS operation

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

All of the above

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

175

65

82

14

Page 5 of 5

41. The ease with which petrol vaporizes is called its

Volatility

Octane number

Oxidation

Cetane number

42. Wheel base of a vehicle is the

Distance between the centres of the front tyres

Distance between the centres of the front and rear wheels

Distance between the centres of the rear tyres

Extreme length of the vehicle

43. 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/2

P.L.A.N/4

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

Sharp edged fragments

Small particles

Large particles

None of these

45. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Reduces intake noise

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

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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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