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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 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

2. The Diesel engines are also known as

None of these

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

Steam engines

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

1.82

2.81

1.28

1.00

4. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Freon-12

Ammonium chloride

Carbon disulphide

5. 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

Maintain directional control

Compensate for wear in the steering linkage

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

Operates the clutch

Meshes the gears

Moves the synchronizer

Selects the synchronizer

7. The effect of having excess camber is

Hard steering

Excessive steering alignment torque

Too much traction

Uneven tyre wear

8. 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

9. The specific gravity of petrol is about

1.25

0.75

0.85

0.95

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

Larger than the positive terminal post

Smaller than the positive terminal post

None of these

Of the same size as the positive terminal post

Page 2 of 5

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

Sharp edged fragments

None of these

Large particles

Small particles

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

175

82

14

65

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

Incomplete valve closure

None of these

Fouling of spark plug by gasoline

Overheating of the engine

14. The valve tappet clearance is measured by

Screw pitch gauge

Feeler gauge

Engineering scale

Vernier caliper

15. 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

16. 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 differential carrier houses differential pinion gears and side gears.

The drive shafts are splined to the differential carrier.

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

Matadors

Passenger cars

Tractors

Trucks

18. The fuel that detonates easily, is

Alcohol

Iso-octane

Benzene

N-heptane

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

Ignition warning bulb

Parking light bulb

Stop light bulb

Head light bulb

20. 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/4

2 × P.L.A.N

P.L.A.N

Page 3 of 5

21. The power source for a brake booster is

Exhaust manifold pressure

Hydraulic pump

Electricity

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

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

Improved fuel efficiency

Improved emission

All of these

Improved power output

23. The parking brake generally acts on

Propeller shaft

Front and rear wheels

Rear wheels

Front wheels

24. Odometer is an instrument used for measurement of

Fuel consumption

Distance

Engine r.p.m.

Power

25. 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

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

1-3-2-4

1-2-3-4

1-2-4-3

1-3-4-2

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

Judder during braking

Localized wearing of the brake pads

Ineffectiveness of the brakes

Rapid wearing of the brake pads

28. The ease with which petrol vaporizes is called its

Oxidation

Octane number

Cetane number

Volatility

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

110

90

120

100

30. Engine misfiring is likely to result from

Vapours lock in the fuel only

Spark plug gap too wide

Incorrect fuel air mixture

Spark plug gap too small

Page 4 of 5

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

15%

20%

5%

10%

32. Bead wires are made of

Copper

Zinc

Steel

Aluminium

33. The Diesel engine works on

Otto cycle

Diesel cycle

Rankine cycle

Carnot cycle

34. The specific gravity of Diesel is about

0.65

0.95

0.85

0.75

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

Exhaust gas volume

Air-fuel ratio

Air flow speed

Air temperature

36. The function of a governor in automobiles is to

Maintain constant engine speed

Limit the power

Limit the vehicle speed

Maximise the fuel economy

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

Partly converts engine power into electric power

Continually recharges the battery

Supply electric power

Converts mechanical energy into electrical energy

38. Wheel base of a vehicle is the

Distance between the centres of the front and rear wheels

Extreme length of the vehicle

Distance between the centres of the front tyres

Distance between the centres of the rear tyres

39. The brake pedal during ABS operation

All of the above

Pedal stroke becomes longer

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

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

Tendency to assume toe-out orientation

Poor recovery of the steering wheel after making a turn

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

Page 5 of 5

41. Which of the following oil is more viscous?

SAE 70

SAE 40

SAE 30

SAE 80

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

Exhaust volume

Clearance volume

None of these

Cylinder volume

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

Big end

Small end

Crank arm

Journal

44. Tachometer in a vehicle measures

Engine r.p.m.

Speed

Fuel consumption

Distance

45. Cushioning springs in clutch plate reduces

None of these

Vehicle speed

Jerky starts

Torsional vibrations

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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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