Internal Combustion Engines
The compression ignition engines are governed by

Hit and miss governing
Combination of (B) and (C)
Quantitative governing
Qualitative governing

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

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

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