Internal Combustion Engines
Supercharging is the process of

Supplying compressed air to remove combustion products fully
Providing forced cooling air
Supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere
Injecting excess fuel for raising more loads

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Internal Combustion Engines
Which of the following statement is correct regarding petrol engines?

The fuel is first evaporated after passing through a carburettor and is mixed with air before ignition
A fine fuel spray mixed with air is ignited by the heat of compression which is at a high pressure
All of these
The fuel supplied to the engine cylinder is mixed with necessary amount of air and the mixture in ignited with the help of a spark plug

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Internal Combustion Engines
For the same compression ratio

Diesel cycle is more efficient than Otto
Compression ratio has nothing to do with efficiency
Both Otto and Diesel cycles are, equally efficient
Otto cycle is more efficient than the Diesel

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