Internal Combustion Engines
The compression ignition engines are governed by

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

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

Opens at 20° after top dead center and closes at 20° before bottom dead center
May open or close anywhere
Opens at top dead center and closes at bottom dead center
Opens at 20° before top dead center and closes at 40° after bottom dead center

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