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 the mentioned
Answer:B
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 the mentioned