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單項選擇題

The pump discharge pressure will be considerably higher than the pressure at the （）.

A.pump entry branch
B.outlet pipe
C.impeller
D.None of the above is true

單項選擇題

What is the purpose of a relief valve?（）

A.to fill 2 tanks at the same time
B.to use pump at a higher pressure
C.to return liquid to suction side if discharge valve is closed
D.All of the above are true