The diagram above shows a lift pump with valves at P and Q. During a downward stroke of the piston
Attached Figure / Diagram
A
both valves are open
B
P is open while Q is closed
C
P is closed while Q is open
D
Both valves are closed
Verified Correct Answer: B.
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #11171)