INTERNAL COMBUSTION ENGINES QUIZ

The loud pulsating noise heard within the cylinder of an internal combustion engine is known as

Detonation

Turbulence

Pre-ignition

Supercharging

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By higher octane number of spark ignition fuel, it is meant that the fuel has

Higher heating value

Lower volatility

Higher flash point

Longer ignition delay

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A mixture containing 65% of iso-octane and 35% of normal heptane will have

Octane number 35

Octane number 65

Cetane number 65

Cetane number 35

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The method of determination of indicated power of a multi cylinder spark ignition engine is by the use of

Prony brake test

Morse test

Heat balance test

Motoring test

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Diesel as compared to petrol is

More difficult to ignite

Less difficult to ignite

Highly ignitable

None of these

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

Fuel injector

Spark plug

Ignition coil

Carburettor

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Morse test can be conducted for

Petrol engines

Multi cylinder engines

All of the listed here

Diesel engines

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The effective inhibitor of pre-ignition is

Lead

None of these

Water

Alcohol

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In a four stroke cycle petrol engine, the pressure inside the engine cylinder during the suction stroke is __________ the atmospheric pressure.

Above

Equal to

Below

None of these

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The knocking in diesel engines may be prevented by

All of these

Raising the compression ratio

Increasing the inlet pressure of air

Reducing the delay period

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