Internal Combustion Engines
The air requirement of a petrol engine during starting compared to theoretical air required for complete combustion is

May be more or less depending on engine capacity
More
Less
Same

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Internal Combustion Engines
Pick up the wrong statement about supercharging

Supercharging at high altitudes is essential
There can be limited supercharging in petrol engines because of detonation
Supercharging results in fuel economy
Supercharging reduces knocking in diesel engines

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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
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
All of these

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