4. For a centrifugal pump operating with a characteristic curve shown in the figure below (adopted from your textbook),
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4. For a centrifugal pump operating with a characteristic curve shown in the figure below (adopted from your textbook), plot the head-discharge and power input curves, when the pump diameter is 2 m and the speed is 750 rpm. If the electricity costs $ 0.05/KWH, find the cost of pumping at the maximum efficiency. (25 points GH 1.00 Efficiency. m 4 0.75 CH 3 Cp and efficiency С. 0.50 0.25 O 0.16 0.04 0.12 0.08 Со Figure 8-9 Dimensionless performance curves for a centrifugal pump, from data given in Fig. 8-8 (3)