I agree that only the exhaust valve is open
at the end of the power stroke. Had the question said
"At the point of finishing the power stroke, which valves are open". We would all be happy.
Half the problem with these questions is that in subjects such as PoF it's vital to consider points in time in order to fully understand the theory. For example, at the point of alpha crit an aerofoil produces maximum lift; but you could argue that at alpha crit, the aerofoil starts losing lift.
Simply stating "after the power stroke" is not clear enough.
I found this animation of the
Otto Cycle
Fingers crossed for the results, good luck to all.
I really don't have a clue if I passed or failed miserably and that troubles me...
