Engine: Steam Plants

1. A Both the intake and exhaust valves are closed during the transition from the exhaust stroke to the intake stroke at top dead center.
2. B Both the intake and exhaust valves are open during the transition from the exhaust stroke to the intake stroke at bottom dead center.
3. C Both the intake and exhaust valves are open during the transition from the exhaust stroke to the intake stroke at top dead center.
4. D Both the intake and exhaust valves are closed during the transition from the exhaust stroke to the intake stroke at bottom dead center.

Tip: press A-D to answer