Internal Combustion Engines
It the temperature of intake air in IC engines is lowered, then its efficiency will

Remain same
Decrease
Increase
Increase up to certain limit and then decrease

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

May start and end anywhere
Starts at 40° after bottom dead centre and ends at 30° before top dead centre
Starts at 40° before bottom dead centre and ends at 30° after bottom dead centre
Starts at bottom dead centre and ends at top dead centre

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