दाखिल करना
JAMB - Physics (1999 - No. 42)
The diagram above shows a lift pump with valves at P and Q. During a downward stroke of the piston
both valves are open
P is open while Q is closed
P is closed while Q is open
Both valves are closed
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जावास्क्रिप्ट को इस पृष्ठ को ठीक से लोड करने की अनुमति दें
