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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. Tachometer in a vehicle measures

Fuel consumption

Speed

Distance

Engine r.p.m.

2. The commonly used antifreeze solution in automobiles is

Freon-12

Carbon disulphide

Ammonium chloride

Ethylene glycol

3. Cushioning springs in clutch plate reduces

Jerky starts

Vehicle speed

None of these

Torsional vibrations

4. The parking brake generally acts on

Propeller shaft

Front and rear wheels

Rear wheels

Front wheels

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

Adjust the tyre pressure

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

Adjust the damper spring tension

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

None of these

Overheating of the engine

Fouling of spark plug by gasoline

Incomplete valve closure

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

14

65

82

175

8. 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

9. 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

10. 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 drive-shaft

Belt driven by crankshaft

Page 2 of 5

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

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.

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

Tendency to assume toe-out orientation

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

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

The pressure created by the oil pump

Gravity

None of these

Splashing action of the crankshaft

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

Head light bulb

Stop light bulb

Ignition warning bulb

Parking light bulb

15. Bead wires are made of

Aluminium

Copper

Steel

Zinc

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

5%

10%

20%

15%

17. The ease with which petrol vaporizes is called its

Oxidation

Octane number

Cetane number

Volatility

18. 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

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

Crank arm

Big end

Small end

Journal

20. The Diesel engine works on

Otto cycle

Diesel cycle

Carnot cycle

Rankine cycle

Page 3 of 5

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

1-2-3-4

1-2-4-3

1-3-4-2

1-3-2-4

22. The valve tappet clearance is measured by

Vernier caliper

Engineering scale

Screw pitch gauge

Feeler gauge

23. Odometer is an instrument used for measurement of

Power

Fuel consumption

Distance

Engine r.p.m.

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

1.82

2.81

1.00

1.28

25. 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

26. The specific gravity of Diesel is about

0.65

0.95

0.85

0.75

27. 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/2

P.L.A.N/4

2 × P.L.A.N

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

Smaller than the positive terminal post

Of the same size as the positive terminal post

Larger than the positive terminal post

None of these

29. The effect of having excess camber is

Excessive steering alignment torque

Too much traction

Hard steering

Uneven tyre wear

30. 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

Page 4 of 5

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

None of these

Clearance volume

Cylinder volume

Exhaust volume

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

All of these

Improved emission

Improved power output

Improved fuel efficiency

33. The specific gravity of petrol is about

0.85

1.25

0.75

0.95

34. 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

35. The power source for a brake booster is

Hydraulic pump

Exhaust manifold pressure

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

Electricity

36. Which of the following oil is more viscous?

SAE 30

SAE 70

SAE 80

SAE 40

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

Air temperature

Air flow speed

Air-fuel ratio

Exhaust gas volume

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

Large particles

Sharp edged fragments

None of these

Small particles

39. 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

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

90

120

100

110

Page 5 of 5

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

Matadors

Tractors

Passenger cars

Trucks

42. The Diesel engines are also known as

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

Steam engines

None of these

43. The function of a governor in automobiles is to

Limit the vehicle speed

Maintain constant engine speed

Limit the power

Maximise the fuel economy

44. 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 and rear wheels

Distance between the centres of the front tyres

45. The fuel that detonates easily, is

Alcohol

Iso-octane

Benzene

N-heptane

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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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