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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 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/4

P.L.A.N/2

2 × P.L.A.N

2. Cushioning springs in clutch plate reduces

None of these

Torsional vibrations

Jerky starts

Vehicle speed

3. The effect of having excess camber is

Excessive steering alignment torque

Too much traction

Hard steering

Uneven tyre wear

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

Chain driven by crankshaft

Belt driven by drive-shaft

Belt driven by crankshaft

Belt driven by camshaft

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

1-2-4-3

1-3-4-2

1-2-3-4

1-3-2-4

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

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

Compensate for wear in the steering linkage

Prevent uneven tyre wear

Maintain directional control

7. Bead wires are made of

Zinc

Aluminium

Steel

Copper

8. The valve tappet clearance is measured by

Feeler gauge

Screw pitch gauge

Vernier caliper

Engineering scale

9. The specific gravity of petrol is about

0.95

0.85

1.25

0.75

10. Wheel base of a vehicle is the

Distance between the centres of the front tyres

Distance between the centres of the front and rear wheels

Distance between the centres of the rear tyres

Extreme length of the vehicle

Page 2 of 5

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

Passenger cars

Trucks

Tractors

Matadors

12. The fuel that detonates easily, is

Alcohol

Iso-octane

N-heptane

Benzene

13. The parking brake generally acts on

Front wheels

Front and rear wheels

Rear wheels

Propeller shaft

14. The brake pedal during ABS operation

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

Is pushed upward forcefully

All of the above

15. 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

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

20%

15%

10%

5%

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

None of these

Sharp edged fragments

Small particles

Large particles

18. The main function of intake manifold is that it

Reduces intake noise

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

Cools the intake air to a suitable temperature

19. Which of the following oil is more viscous?

SAE 30

SAE 80

SAE 40

SAE 70

20. The function of a governor in automobiles is to

Limit the power

Maintain constant engine speed

Maximise the fuel economy

Limit the vehicle speed

Page 3 of 5

21. Odometer is an instrument used for measurement of

Distance

Fuel consumption

Engine r.p.m.

Power

22. The ease with which petrol vaporizes is called its

Oxidation

Volatility

Cetane number

Octane number

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

Adjust the tyre pressure

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

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

110

120

100

90

25. The specific gravity of Diesel is about

0.85

0.95

0.75

0.65

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

Selects the synchronizer

Meshes the gears

Moves the synchronizer

Operates the clutch

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

Stop light bulb

Parking light bulb

Head light bulb

Ignition warning bulb

28. 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

29. 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.

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.

30. 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

Page 4 of 5

31. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Carbon disulphide

Freon-12

Ethylene glycol

32. Engine misfiring is likely to result from

Spark plug gap too small

Vapours lock in the fuel only

Incorrect fuel air mixture

Spark plug gap too wide

33. The Diesel engine works on

Diesel cycle

Otto cycle

Carnot cycle

Rankine cycle

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

14

82

175

65

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

Overheating of the engine

Incomplete valve closure

Fouling of spark plug by gasoline

None of these

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

2.81

1.82

1.28

1.00

37. 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

38. 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

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

39. The power source for a brake booster is

Electricity

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

Hydraulic pump

Exhaust manifold pressure

40. Tachometer in a vehicle measures

Engine r.p.m.

Speed

Distance

Fuel consumption

Page 5 of 5

41. The Diesel engines are also known as

Spark ignition (S.I.) engines

Steam engines

Compression ignition (C.I.) engines

None of these

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

All of these

Improved fuel efficiency

Improved emission

Improved power output

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

None of these

Gravity

The pressure created by the oil pump

Splashing action of the crankshaft

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

Converts mechanical energy into electrical energy

Supply electric power

Continually recharges the battery

Partly converts engine power into electric power

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

Big end

Journal

Small end

Crank arm

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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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