Question

In a four stroke cycle petrol engine, the inlet valve

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

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Q. In a four stroke cycle petrol engine, the inlet valve

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