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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. 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

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

The pressure created by the oil pump

Splashing action of the crankshaft

Gravity

None of these

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

Matadors

Passenger cars

Trucks

Tractors

4. The valve tappet clearance is measured by

Vernier caliper

Feeler gauge

Screw pitch gauge

Engineering scale

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

Stop light bulb

Parking light bulb

Ignition warning bulb

Head light bulb

6. The brake pedal during ABS operation

Transmits slight kickback to the driver's foot

All of the above

Is pushed upward forcefully

Pedal stroke becomes longer

7. The ease with which petrol vaporizes is called its

Oxidation

Volatility

Cetane number

Octane number

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

175

65

14

82

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

Belt driven by drive-shaft

Belt driven by camshaft

Belt driven by crankshaft

Chain driven by crankshaft

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

1.28

1.00

2.81

1.82

Page 2 of 5

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

None of these

Larger than the positive terminal post

Smaller than the positive terminal post

Of the same size as the positive terminal post

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

None of these

Sharp edged fragments

Large particles

Small particles

13. Wheel base of a vehicle is the

Extreme length of the vehicle

Distance between the centres of the front and rear wheels

Distance between the centres of the rear tyres

Distance between the centres of the front tyres

14. The effect of having excess camber is

Excessive steering alignment torque

Hard steering

Uneven tyre wear

Too much traction

15. Cushioning springs in clutch plate reduces

Torsional vibrations

None of these

Vehicle speed

Jerky starts

16. 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

17. 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

18. The Diesel engines are also known as

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

Steam engines

None of these

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

110

120

100

90

20. The function of a governor in automobiles is to

Maintain constant engine speed

Limit the vehicle speed

Maximise the fuel economy

Limit the power

Page 3 of 5

21. Tachometer in a vehicle measures

Speed

Engine r.p.m.

Fuel consumption

Distance

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

Supply electric power

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

Continually recharges the battery

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

10%

20%

5%

15%

24. 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

25. 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

Hydraulic pump

Electricity

26. Bead wires are made of

Copper

Aluminium

Zinc

Steel

27. The specific gravity of petrol is about

0.95

1.25

0.75

0.85

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

Moves the synchronizer

Meshes the gears

Operates the clutch

Selects the synchronizer

29. The parking brake generally acts on

Rear wheels

Front wheels

Propeller shaft

Front and rear wheels

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

Localized wearing of the brake pads

Ineffectiveness of the brakes

Rapid wearing of the brake pads

Judder during braking

Page 4 of 5

31. 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

32. The main function of intake manifold is that it

Reduces intake noise

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

33. The specific gravity of Diesel is about

0.65

0.95

0.75

0.85

34. Odometer is an instrument used for measurement of

Fuel consumption

Power

Distance

Engine r.p.m.

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

The drive shafts are splined to the differential carrier.

36. 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

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

Improved fuel efficiency

Improved power output

Improved emission

All of these

38. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Carbon disulphide

Ammonium chloride

Freon-12

39. 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

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

Big end

Small end

Crank arm

Journal

Page 5 of 5

41. The Diesel engine works on

Carnot cycle

Diesel cycle

Rankine cycle

Otto cycle

42. The fuel that detonates easily, is

N-heptane

Benzene

Alcohol

Iso-octane

43. Engine misfiring is likely to result from

Spark plug gap too small

Vapours lock in the fuel only

Spark plug gap too wide

Incorrect fuel air mixture

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

1-2-3-4

1-2-4-3

1-3-2-4

1-3-4-2

45. Which of the following oil is more viscous?

SAE 40

SAE 70

SAE 80

SAE 30

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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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