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

None of these

Gravity

Splashing action of the crankshaft

The pressure created by the oil pump

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

Maintain directional control

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

Prevent uneven tyre wear

Compensate for wear in the steering linkage

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

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

Poor recovery of the steering wheel after making a turn

Tendency to assume toe-out orientation

4. The parking brake generally acts on

Front wheels

Front and rear wheels

Rear wheels

Propeller shaft

5. Which of the following oil is more viscous?

SAE 40

SAE 70

SAE 30

SAE 80

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

Localized wearing of the brake pads

Judder during braking

Rapid wearing of the brake pads

Ineffectiveness of the brakes

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

1-3-4-2

1-3-2-4

1-2-3-4

1-2-4-3

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

15%

5%

20%

10%

9. Tachometer in a vehicle measures

Engine r.p.m.

Distance

Speed

Fuel consumption

10. The function of a governor in automobiles is to

Limit the power

Maximise the fuel economy

Maintain constant engine speed

Limit the vehicle speed

Page 2 of 5

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

Air-fuel ratio

Air temperature

Air flow speed

Exhaust gas volume

12. Bead wires are made of

Aluminium

Zinc

Copper

Steel

13. 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 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.

14. 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

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

175

82

14

65

16. Wheel base of a vehicle is the

Distance between the centres of the rear tyres

Extreme length of the vehicle

Distance between the centres of the front tyres

Distance between the centres of the front and rear wheels

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

Sharp edged fragments

Small particles

None of these

Large particles

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

Belt driven by camshaft

Belt driven by drive-shaft

Chain driven by crankshaft

Belt driven by crankshaft

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

Exhaust volume

Clearance volume

Cylinder volume

None of these

20. The effect of having excess camber is

Too much traction

Hard steering

Uneven tyre wear

Excessive steering alignment torque

Page 3 of 5

21. The valve tappet clearance is measured by

Vernier caliper

Screw pitch gauge

Feeler gauge

Engineering scale

22. The ease with which petrol vaporizes is called its

Volatility

Cetane number

Oxidation

Octane number

23. The fuel that detonates easily, is

Alcohol

Iso-octane

Benzene

N-heptane

24. The specific gravity of Diesel is about

0.65

0.85

0.75

0.95

25. Engine misfiring is likely to result from

Spark plug gap too small

Vapours lock in the fuel only

Incorrect fuel air mixture

Spark plug gap too wide

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

Passenger cars

Tractors

Matadors

Trucks

27. Odometer is an instrument used for measurement of

Distance

Engine r.p.m.

Power

Fuel consumption

28. The power source for a brake booster is

Electricity

Hydraulic pump

Exhaust manifold pressure

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

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

100

110

120

90

30. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Carbon disulphide

Freon-12

Ammonium chloride

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

P.L.A.N/4

P.L.A.N/2

2 × P.L.A.N

32. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Reduces intake noise

Promotes the mixture of air and fuel

Cools the intake air to a suitable temperature

33. The Diesel engines are also known as

Compression ignition (C.I.) engines

Steam engines

Spark ignition (S.I.) engines

None of these

34. The Diesel engine works on

Diesel cycle

Carnot cycle

Otto cycle

Rankine cycle

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

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

Adjust the tyre pressure

Adjust the damper spring tension

36. 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

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

2.81

1.82

1.28

1.00

38. The brake pedal during ABS operation

All of the above

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

Is pushed upward forcefully

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

Journal

Crank arm

Big end

Small end

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

Head light bulb

Stop light bulb

Parking light bulb

Ignition warning bulb

Page 5 of 5

41. The specific gravity of petrol is about

0.85

1.25

0.95

0.75

42. Cushioning springs in clutch plate reduces

Vehicle speed

None of these

Torsional vibrations

Jerky starts

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

Improved emission

Improved fuel efficiency

Improved power output

All of these

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

Incomplete valve closure

Overheating of the engine

None of these

Fouling of spark plug by gasoline

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

Of the same size as the positive terminal post

Larger than the positive terminal post

None of these

Smaller than the positive terminal post

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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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