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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 function of a governor in automobiles is to

Maintain constant engine speed

Maximise the fuel economy

Limit the power

Limit the vehicle speed

2. Engine misfiring is likely to result from

Vapours lock in the fuel only

Spark plug gap too wide

Spark plug gap too small

Incorrect fuel air mixture

3. 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

2 × P.L.A.N

P.L.A.N/4

P.L.A.N

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

Larger than the positive terminal post

Of the same size as the positive terminal post

Smaller than the positive terminal post

None of these

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

5%

15%

20%

10%

6. 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

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

100

110

120

90

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

Localized wearing of the brake pads

Judder during braking

Rapid wearing of the brake pads

Ineffectiveness of the brakes

9. The Diesel engine works on

Carnot cycle

Rankine cycle

Diesel cycle

Otto cycle

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

Ignition warning bulb

Head light bulb

Parking light bulb

Stop light bulb

Page 2 of 5

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

Fouling of spark plug by gasoline

None of these

Overheating of the engine

Incomplete valve closure

12. The parking brake generally acts on

Propeller shaft

Front and rear wheels

Front wheels

Rear wheels

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

Journal

Small end

Big end

Crank arm

14. The power source for a brake booster is

Exhaust manifold pressure

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

Electricity

Hydraulic pump

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

Air temperature

Exhaust gas volume

Air flow speed

Air-fuel ratio

16. Cushioning springs in clutch plate reduces

Vehicle speed

Torsional vibrations

None of these

Jerky starts

17. The fuel that detonates easily, is

Alcohol

Iso-octane

N-heptane

Benzene

18. The ease with which petrol vaporizes is called its

Volatility

Oxidation

Cetane number

Octane number

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

Converts mechanical energy into electrical energy

Supply electric power

Partly converts engine power into electric power

Continually recharges the battery

20. 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

Page 3 of 5

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

1.00

1.82

1.28

2.81

22. Wheel base of a vehicle is the

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

Extreme length of the vehicle

Distance between the centres of the front tyres

23. The specific gravity of Diesel is about

0.65

0.95

0.85

0.75

24. The effect of having excess camber is

Too much traction

Excessive steering alignment torque

Hard steering

Uneven tyre wear

25. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ethylene glycol

Ammonium chloride

Freon-12

26. The valve tappet clearance is measured by

Screw pitch gauge

Feeler gauge

Vernier caliper

Engineering scale

27. The specific gravity of petrol is about

1.25

0.85

0.75

0.95

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

Poor recovery of the steering wheel after making a turn

Generation of a braking effect at tight corners

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

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

Belt driven by crankshaft

Chain driven by crankshaft

Belt driven by camshaft

Belt driven by drive-shaft

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

The drive shafts are splined to the differential carrier.

The left side gear and the differential carrier rotate in constant unison.

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.

Page 4 of 5

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

65

82

175

14

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

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

Adjust the tyre pressure

Adjust the damper spring tension

33. Which of the following oil is more viscous?

SAE 40

SAE 80

SAE 30

SAE 70

34. Odometer is an instrument used for measurement of

Engine r.p.m.

Power

Distance

Fuel consumption

35. Bead wires are made of

Steel

Aluminium

Copper

Zinc

36. Tachometer in a vehicle measures

Speed

Engine r.p.m.

Distance

Fuel consumption

37. The brake pedal during ABS operation

Pedal stroke becomes longer

All of the above

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

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

Matadors

Passenger cars

Tractors

Trucks

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

Cylinder volume

Clearance volume

None of these

Exhaust volume

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

Sharp edged fragments

None of these

Small particles

Large particles

Page 5 of 5

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

Moves the synchronizer

Meshes the gears

Operates the clutch

Selects the synchronizer

42. 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

Compensate for wear in the steering linkage

Maintain directional control

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

All of these

Improved power output

Improved fuel efficiency

Improved emission

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

Gravity

Splashing action of the crankshaft

None of these

The pressure created by the oil pump

45. The Diesel engines are also known as

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

None of these

Steam engines

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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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