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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 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

2. The power source for a brake booster is

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

Hydraulic pump

Exhaust manifold pressure

Electricity

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

Compensate for wear in the steering linkage

Prevent uneven tyre wear

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

Maintain directional control

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

The pressure created by the oil pump

None of these

Gravity

Splashing action of the crankshaft

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

Fouling of spark plug by gasoline

Incomplete valve closure

None of these

Overheating of the engine

6. The fuel that detonates easily, is

Iso-octane

Benzene

Alcohol

N-heptane

7. The effect of having excess camber is

Uneven tyre wear

Excessive steering alignment torque

Hard steering

Too much traction

8. Cushioning springs in clutch plate reduces

Vehicle speed

Torsional vibrations

None of these

Jerky starts

9. The ease with which petrol vaporizes is called its

Oxidation

Octane number

Cetane number

Volatility

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

Operates the clutch

Selects the synchronizer

Moves the synchronizer

Meshes the gears

Page 2 of 5

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

Partly converts engine power into electric power

Continually recharges the battery

Converts mechanical energy into electrical energy

Supply electric power

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

Tractors

Passenger cars

Matadors

Trucks

13. The parking brake generally acts on

Front and rear wheels

Front wheels

Rear wheels

Propeller shaft

14. 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

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

Journal

Crank arm

Small end

Big end

16. Which of the following oil is more viscous?

SAE 40

SAE 80

SAE 30

SAE 70

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

Belt driven by camshaft

Belt driven by drive-shaft

Chain driven by crankshaft

Belt driven by crankshaft

18. Tachometer in a vehicle measures

Distance

Fuel consumption

Engine r.p.m.

Speed

19. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

Reduces intake noise

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

Improved emission

All of these

Improved power output

Improved fuel efficiency

Page 3 of 5

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

90

100

120

110

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

Smaller than the positive terminal post

None of these

Of the same size as the positive terminal post

Larger than the positive terminal post

23. Odometer is an instrument used for measurement of

Power

Distance

Fuel consumption

Engine r.p.m.

24. The specific gravity of petrol is about

0.95

0.85

0.75

1.25

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

175

14

82

65

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

Exhaust gas volume

Air flow speed

Air temperature

Air-fuel ratio

27. The specific gravity of Diesel is about

0.65

0.85

0.75

0.95

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

Head light bulb

Stop light bulb

Parking light bulb

Ignition warning bulb

29. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ethylene glycol

Ammonium chloride

Freon-12

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

Page 4 of 5

31. The valve tappet clearance is measured by

Screw pitch gauge

Engineering scale

Vernier caliper

Feeler gauge

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

Rotate the tyres

Adjust the damper spring tension

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

33. Bead wires are made of

Zinc

Steel

Aluminium

Copper

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

Large particles

None of these

Sharp edged fragments

Small particles

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

Clearance volume

Exhaust volume

None of these

Cylinder volume

36. The function of a governor in automobiles is to

Limit the power

Maximise the fuel economy

Limit the vehicle speed

Maintain constant engine speed

37. 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/4

2 × P.L.A.N

P.L.A.N/2

P.L.A.N

38. The Diesel engine works on

Carnot cycle

Diesel cycle

Otto cycle

Rankine cycle

39. The Diesel engines are also known as

Steam engines

Compression ignition (C.I.) engines

None of these

Spark ignition (S.I.) engines

40. 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

Page 5 of 5

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

Generation of a braking effect at tight corners

Poor recovery of the steering wheel after making a turn

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

42. 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

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

1.28

2.81

1.82

1.00

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

10%

15%

5%

20%

45. Wheel base of a vehicle is the

Distance between the centres of the front and rear wheels

Distance between the centres of the front tyres

Extreme length of the vehicle

Distance between the centres of the rear tyres

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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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