In a typical medium speed 4-stroke cycle diesel engine the inlet valve_____________________?
(A) opens at 20° before top dead center and closes at 35° after the bottom dead center
(B) opens at top dead center and closes at bottom dead center
(C) opens at 10° after top dead center and closes 20° before the bottom dead center
(D) may open or close anywhere
(E) remains open for 200°.
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