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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 negative terminal post on the top of a battery is

None of these

Smaller than the positive terminal post

Larger than the positive terminal post

Of the same size as the positive terminal post

2. Odometer is an instrument used for measurement of

Fuel consumption

Power

Engine r.p.m.

Distance

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

Trucks

Passenger cars

Matadors

Tractors

4. The specific gravity of Diesel is about

0.65

0.85

0.75

0.95

5. The specific gravity of petrol is about

0.75

0.85

1.25

0.95

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

Ignition warning bulb

Stop light bulb

Head light bulb

Parking light bulb

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

Ineffectiveness of the brakes

Localized wearing of the brake pads

Judder during braking

Rapid wearing of the brake pads

8. Wheel base of a vehicle is the

Distance between the centres of the rear tyres

Distance between the centres of the front tyres

Extreme length of the vehicle

Distance between the centres of the front and rear wheels

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

20%

5%

15%

10%

10. The effect of having excess camber is

Hard steering

Uneven tyre wear

Excessive steering alignment torque

Too much traction

Page 2 of 5

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

None of these

Incomplete valve closure

Overheating of the engine

Fouling of spark plug by gasoline

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

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

Maintain directional control

Prevent uneven tyre wear

Compensate for wear in the steering linkage

13. The valve tappet clearance is measured by

Screw pitch gauge

Engineering scale

Vernier caliper

Feeler gauge

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

1.00

1.82

2.81

1.28

15. 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

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

Operates the clutch

Selects the synchronizer

Meshes the gears

Moves the synchronizer

17. The ease with which petrol vaporizes is called its

Octane number

Cetane number

Volatility

Oxidation

18. Which of the following oil is more viscous?

SAE 80

SAE 70

SAE 40

SAE 30

19. The Diesel engine works on

Carnot cycle

Rankine cycle

Otto cycle

Diesel cycle

20. 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; each pinion gear meshes with a different side gear.

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

The differential carrier houses differential pinion gears and side gears.

Page 3 of 5

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

175

82

65

14

22. 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

23. Bead wires are made of

Steel

Copper

Aluminium

Zinc

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

90

120

110

100

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

Gravity

None of these

The pressure created by the oil pump

Splashing action of the crankshaft

26. The power source for a brake booster is

Hydraulic pump

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

Electricity

Exhaust manifold pressure

27. 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

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

Big end

Journal

Crank arm

Small end

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

None of these

Small particles

Sharp edged fragments

Large particles

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

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

Adjust the tyre pressure

Page 4 of 5

31. The fuel that detonates easily, is

Benzene

N-heptane

Iso-octane

Alcohol

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

Supply electric power

Partly converts engine power into electric power

Continually recharges the battery

Converts mechanical energy into electrical energy

33. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ethylene glycol

Freon-12

Ammonium chloride

34. Tachometer in a vehicle measures

Speed

Engine r.p.m.

Fuel consumption

Distance

35. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

Reduces intake noise

36. 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

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

Air-fuel ratio

Air flow speed

Exhaust gas volume

Air temperature

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

Improved fuel efficiency

All of these

Improved emission

Improved power output

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

Belt driven by camshaft

Chain driven by crankshaft

Belt driven by drive-shaft

Belt driven by crankshaft

40. 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

Page 5 of 5

41. Cushioning springs in clutch plate reduces

Vehicle speed

Torsional vibrations

None of these

Jerky starts

42. The parking brake generally acts on

Propeller shaft

Rear wheels

Front and rear wheels

Front wheels

43. The Diesel engines are also known as

Spark ignition (S.I.) engines

None of these

Compression ignition (C.I.) engines

Steam engines

44. 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

45. The function of a governor in automobiles is to

Limit the power

Maintain constant engine speed

Limit the vehicle speed

Maximise the fuel economy

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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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