Hydraulics and Fluid Mechanics in ME
Power required (in watts) to drive a centrifugal pump is (where Hm = Manometric head in metres, w = Specific weight in N/m3, Q = Discharge of the pump in m3/s, and ηo = Overall efficiency of the pump)

(w Hm) / (Q × ηo)
(w Hm Q) / ηo
(w Q ηo) / Hm
(w Q) / (Hm × ηo)

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Hydraulics and Fluid Mechanics in ME
Runaway speed of a hydraulic turbine is

The speed at which turbine runner will be damaged
Full load speed
The speed if the turbine runner is allowed to revolve freely without load and with the wicket gates wide open
The speed corresponding to maximum overload permissible

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