INTERNAL COMBUSTION ENGINES QUIZ

The term scavenging is generally associated with

Aeroplane engines

2-stroke cycle engines

4-stroke cycle engines

High efficiency engines

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Iso-octane (C₈H₁₈) has octane number of

50

120

0

100

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The delay period in compression ignition engines depends upon

All of these

Temperature and pressure in the cylinder at the time of injection

Relative velocity between the fuel injection and air turbulence pressure of residual gases

Nature of the fuel mixture strength

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The maximum propulsive efficiency of a turbojet engine is at a speed of

1000 km/h

2400 km/h

2000 km/h

3000 km/h

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In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of

1000Â°C

500Â°C

250Â°C

2000Â°C

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If the temperature of intake air in internal combustion engine increases, then its efficiency will

Increase

Decrease

Remain same

None of the listed here

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As compared to air standard cycle, in actual working, the effect of variation in specific heats is to

Increase maximum pressure and decrease maximum temperature

Decrease maximum pressure and increase maximum temperature

Reduce maximum pressure and maximum temperature

Increase maximum pressure and maximum temperature

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The specific fuel consumption per B.P. hour for a petrol engine is about

0.25 kg

0.2 kg

0.35 kg

0.3 kg

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If petrol is used in a diesel engine, then

Low power will be produced

Efficiency will be low

Higher knocking will occur

Black smoke will be produced

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Which of the following does not relate to a spark ignition engine?

Fuel injector

Ignition coil

Carburettor

Spark plug

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