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mechanical engineering hydraulic machines
1. Theoretical power required (in watts) to drive a reciprocating pump is (where w = Specific weight of liquid to be pumped in N/m3, Q = Discharge of the pump in m3/s, Hs = Suction head in metres, and Hd = Delivery head in metres)
(A): wQ(Hs + Hd)
(B): wQ(Hs  Hd)
(C): wQHd
(D): wQHs
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