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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 function of a governor in automobiles is to

Limit the vehicle speed

Maintain constant engine speed

Limit the power

Maximise the fuel economy

2. The commonly used antifreeze solution in automobiles is

Freon-12

Ammonium chloride

Ethylene glycol

Carbon disulphide

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

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

Poor recovery of the steering wheel after making a turn

The vehicle to pull to the side of lesser inclination

4. 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/4

P.L.A.N/2

5. The parking brake generally acts on

Rear wheels

Front wheels

Front and rear wheels

Propeller shaft

6. Tachometer in a vehicle measures

Distance

Fuel consumption

Speed

Engine r.p.m.

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

Smaller than the positive terminal post

Larger than the positive terminal post

Of the same size as the positive terminal post

None of these

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

Journal

Small end

Big end

Crank arm

9. 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

10. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

Reduces intake noise

Promotes the mixture of air and fuel

Page 2 of 5

11. Bead wires are made of

Zinc

Copper

Steel

Aluminium

12. The Diesel engines are also known as

Compression ignition (C.I.) engines

Steam engines

None of these

Spark ignition (S.I.) engines

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

All of these

Improved emission

Improved fuel efficiency

Improved power output

14. Engine misfiring is likely to result from

Vapours lock in the fuel only

Spark plug gap too wide

Spark plug gap too small

Incorrect fuel air mixture

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

1-3-2-4

1-2-3-4

1-3-4-2

1-2-4-3

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

Overheating of the engine

Fouling of spark plug by gasoline

Incomplete valve closure

None of these

17. Which one of the following statement correctly describes the construction of a bevel gear type differential?

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.

The differential carrier houses differential pinion gears and side gears.

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

Compensate for wear in the steering linkage

Maintain directional control

Prevent uneven tyre wear

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

19. Odometer is an instrument used for measurement of

Fuel consumption

Power

Distance

Engine r.p.m.

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

175

14

82

65

Page 3 of 5

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

Parking light bulb

Head light bulb

Ignition warning bulb

Stop light bulb

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

Moves the synchronizer

Selects the synchronizer

Operates the clutch

Meshes the gears

23. The fuel that detonates easily, is

Iso-octane

N-heptane

Benzene

Alcohol

24. The specific gravity of petrol is about

0.85

0.95

0.75

1.25

25. The specific gravity of Diesel is about

0.75

0.65

0.85

0.95

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

Trucks

Passenger cars

Tractors

Matadors

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

Converts mechanical energy into electrical energy

Continually recharges the battery

Supply electric power

Partly converts engine power into electric power

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

20%

5%

15%

10%

29. Wheel base of a vehicle is the

Extreme length of the vehicle

Distance between the centres of the rear tyres

Distance between the centres of the front tyres

Distance between the centres of the front and rear wheels

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

Belt driven by drive-shaft

Chain driven by crankshaft

Belt driven by camshaft

Belt driven by crankshaft

Page 4 of 5

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

1.00

1.82

2.81

1.28

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

Splashing action of the crankshaft

The pressure created by the oil pump

Gravity

None of these

33. Cushioning springs in clutch plate reduces

Jerky starts

Torsional vibrations

None of these

Vehicle speed

34. The valve tappet clearance is measured by

Screw pitch gauge

Feeler gauge

Engineering scale

Vernier caliper

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

100

110

120

90

36. The ease with which petrol vaporizes is called its

Volatility

Cetane number

Octane number

Oxidation

37. Which of the following oil is more viscous?

SAE 80

SAE 40

SAE 30

SAE 70

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

Cylinder volume

None of these

Exhaust volume

Clearance volume

39. The brake pedal during ABS operation

All of the above

Transmits slight kickback to the driver's foot

Is pushed upward forcefully

Pedal stroke becomes longer

40. The power source for a brake booster is

Electricity

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

Exhaust manifold pressure

Hydraulic pump

Page 5 of 5

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

Small particles

None of these

Large particles

Sharp edged fragments

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

Judder during braking

Localized wearing of the brake pads

Rapid wearing of the brake pads

Ineffectiveness of the brakes

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

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

Adjust the damper spring tension

Adjust the tyre pressure

44. The effect of having excess camber is

Too much traction

Excessive steering alignment torque

Uneven tyre wear

Hard steering

45. The Diesel engine works on

Diesel cycle

Carnot cycle

Rankine cycle

Otto cycle

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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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