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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Internal Combustion Engines
In a four stroke cycle diesel engine, the compression

May start and end anywhere
Starts at top dead center and ends at 40° before bottom dead center
Starts at 40° after bottom dead center and ends at 10° before top dead center
Starts at 40° before top dead center and ends at 40° after top dead center

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