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°.
Correct Answer: opens at 20° before top dead center and closes at 35° after the bottom dead center ✔
Last Updated: January 27, 2019