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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

1-3-4-2

1-2-4-3

2. The fuel that detonates easily, is

Alcohol

Iso-octane

Benzene

N-heptane

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

Generation of a braking effect at tight corners

Tendency to assume toe-out orientation

Poor recovery of the steering wheel after making a turn

The vehicle to pull to the side of lesser inclination

4. Odometer is an instrument used for measurement of

Distance

Fuel consumption

Power

Engine r.p.m.

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

Meshes the gears

Moves the synchronizer

Operates the clutch

Selects the synchronizer

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

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

Adjust the damper spring tension

Adjust the tyre pressure

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

175

82

65

14

8. The specific gravity of Diesel is about

0.75

0.65

0.95

0.85

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

Splashing action of the crankshaft

Gravity

None of these

The pressure created by the oil pump

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

Cylinder volume

Exhaust volume

Clearance volume

None of these

Page 2 of 5

11. 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

2 × P.L.A.N

P.L.A.N/4

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

Continually recharges the battery

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

Supply electric power

13. The power source for a brake booster is

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

Electricity

Exhaust manifold pressure

Hydraulic pump

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

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 drive shafts are splined to the differential carrier.

The differential carrier houses differential pinion gears and side gears.

16. Which of the following oil is more viscous?

SAE 40

SAE 70

SAE 80

SAE 30

17. The valve tappet clearance is measured by

Engineering scale

Feeler gauge

Vernier caliper

Screw pitch gauge

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

Fouling of spark plug by gasoline

Overheating of the engine

Incomplete valve closure

None of these

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

Trucks

Passenger cars

Matadors

Tractors

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

Chain driven by crankshaft

Belt driven by crankshaft

Belt driven by drive-shaft

Belt driven by camshaft

Page 3 of 5

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

Journal

Big end

Crank arm

Small end

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

10%

5%

15%

20%

23. Wheel base of a vehicle is the

Extreme length of the vehicle

Distance between the centres of the front and rear wheels

Distance between the centres of the front tyres

Distance between the centres of the rear tyres

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

All of these

Improved power output

Improved emission

Improved fuel efficiency

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

1.28

1.82

2.81

1.00

26. The specific gravity of petrol is about

0.85

0.95

0.75

1.25

27. The effect of having excess camber is

Excessive steering alignment torque

Uneven tyre wear

Too much traction

Hard steering

28. The Diesel engines are also known as

Steam engines

None of these

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

29. Bead wires are made of

Zinc

Steel

Aluminium

Copper

30. The ease with which petrol vaporizes is called its

Oxidation

Cetane number

Volatility

Octane number

Page 4 of 5

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

Prevent uneven tyre wear

Compensate for wear in the steering linkage

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

Maintain directional control

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

None of these

Small particles

Large particles

Sharp edged fragments

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

Air temperature

Air-fuel ratio

Air flow speed

Exhaust gas volume

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

None of these

Larger than the positive terminal post

Smaller than the positive terminal post

Of the same size as the positive terminal post

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

110

90

120

100

36. The main function of intake manifold is that it

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

Reduces intake noise

Cools the intake air to a suitable temperature

37. The Diesel engine works on

Rankine cycle

Diesel cycle

Otto cycle

Carnot cycle

38. The function of a governor in automobiles is to

Maintain constant engine speed

Limit the vehicle speed

Maximise the fuel economy

Limit the power

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

Localized wearing of the brake pads

Judder during braking

Ineffectiveness of the brakes

Rapid wearing of the brake pads

40. Tachometer in a vehicle measures

Speed

Engine r.p.m.

Fuel consumption

Distance

Page 5 of 5

41. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ammonium chloride

Freon-12

Ethylene glycol

42. The parking brake generally acts on

Rear wheels

Propeller shaft

Front and rear wheels

Front wheels

43. 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

44. Engine misfiring is likely to result from

Incorrect fuel air mixture

Spark plug gap too small

Spark plug gap too wide

Vapours lock in the fuel only

45. Cushioning springs in clutch plate reduces

Torsional vibrations

None of these

Vehicle speed

Jerky starts

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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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