In a four stroke cycle petrol engine, the inlet valve

Question - In a four stroke cycle petrol engine, the inlet valve

Options:

A . opens at top dead centre and closes at bottom dead centre

B . opens at 20° before top dead centre and closes at 40° after bottom dead centre

C . opens at 20° after top dead centre and closes at 20° before bottom dead centre id) may open or close anywhere

D . None of these

Answer: Option B
Answer: (b).opens at 20° before top dead centre and closes at 40° after bottom dead centre

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