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

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

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Internal Combustion Engines
The purpose of testing an internal combustion engine is

All of these
To determine the information, which cannot be obtained by calculations
To conform the data used in design, the validity of which may be doubtful
To satisfy the customer regarding the performance of the engine

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

May start and end anywhere
Starts at bottom dead centre and ends at top dead centre
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

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