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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)

2 × P.L.A.N

P.L.A.N/2

P.L.A.N

P.L.A.N/4

2. The brake pedal during ABS operation

Transmits slight kickback to the driver's foot

All of the above

Pedal stroke becomes longer

Is pushed upward forcefully

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

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

Poor recovery of the steering wheel after making a turn

Tendency to assume toe-out orientation

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

Partly converts engine power into electric power

Supply electric power

Continually recharges the battery

Converts mechanical energy into electrical energy

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

90

120

110

100

6. Cushioning springs in clutch plate reduces

Jerky starts

Vehicle speed

Torsional vibrations

None of these

7. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ethylene glycol

Ammonium chloride

Freon-12

8. 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.

9. The specific gravity of Diesel is about

0.95

0.65

0.85

0.75

10. The effect of having excess camber is

Hard steering

Uneven tyre wear

Too much traction

Excessive steering alignment torque

Page 2 of 5

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

Improved power output

Improved emission

All of these

Improved fuel efficiency

12. The specific gravity of petrol is about

0.95

1.25

0.85

0.75

13. Which of the following oil is more viscous?

SAE 70

SAE 30

SAE 80

SAE 40

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

Exhaust gas volume

Air-fuel ratio

Air temperature

Air flow speed

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

Compensate for wear in the steering linkage

Maintain directional control

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

Prevent uneven tyre wear

16. The valve tappet clearance is measured by

Vernier caliper

Engineering scale

Screw pitch gauge

Feeler gauge

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

Belt driven by drive-shaft

Belt driven by crankshaft

Chain driven by crankshaft

Belt driven by camshaft

18. The Diesel engine works on

Otto cycle

Diesel cycle

Carnot cycle

Rankine cycle

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

Meshes the gears

Selects the synchronizer

Operates the clutch

Moves the synchronizer

20. The ease with which petrol vaporizes is called its

Oxidation

Octane number

Cetane number

Volatility

Page 3 of 5

21. Tachometer in a vehicle measures

Distance

Speed

Fuel consumption

Engine r.p.m.

22. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

Reduces intake noise

Cools the intake air to a suitable temperature

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

None of these

Small particles

Sharp edged fragments

Large particles

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

175

65

14

82

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

Smaller than the positive terminal post

Of the same size as the positive terminal post

Larger than the positive terminal post

None of these

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

Incomplete valve closure

Overheating of the engine

None of these

Fouling of spark plug by gasoline

27. 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

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

Clearance volume

Cylinder volume

Exhaust volume

None of these

29. The fuel that detonates easily, is

Benzene

Alcohol

Iso-octane

N-heptane

30. The function of a governor in automobiles is to

Limit the vehicle speed

Limit the power

Maintain constant engine speed

Maximise the fuel economy

Page 4 of 5

31. The power source for a brake booster is

Hydraulic pump

Exhaust manifold pressure

Electricity

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

32. Odometer is an instrument used for measurement of

Distance

Power

Fuel consumption

Engine r.p.m.

33. Engine misfiring is likely to result from

Incorrect fuel air mixture

Spark plug gap too wide

Spark plug gap too small

Vapours lock in the fuel only

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

Stop light bulb

Head light bulb

Ignition warning bulb

Parking light bulb

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

1-3-2-4

1-3-4-2

1-2-4-3

1-2-3-4

36. The Diesel engines are also known as

None of these

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

Steam engines

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

Journal

Small end

Crank arm

Big end

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

5%

20%

10%

15%

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

Rapid wearing of the brake pads

Judder during braking

Localized wearing of the brake pads

Ineffectiveness of the brakes

40. Wheel base of a vehicle is the

Distance between the centres of the front tyres

Extreme length of the vehicle

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

Page 5 of 5

41. The parking brake generally acts on

Propeller shaft

Rear wheels

Front wheels

Front and rear wheels

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

Adjust the tyre pressure

Rotate the tyres

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

43. Bead wires are made of

Steel

Aluminium

Copper

Zinc

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

2.81

1.00

1.28

1.82

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

Matadors

Passenger cars

Tractors

Trucks

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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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