Performance curves for an operating centrifugal pump are shown below in both conventional units and in dimensionless form. The pump is used to pump water at maximum efficiency at a head of 90 m. Determine, at these new conditions, (a) the pump speed required and (b) the rate of discharge.

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6. CH 1.00 Efficiency, n 0.75 Cp 3 0.50 0.25 0.04 0.08 0.12 0.16 Co dɔ u