The performance characteristics of a certain centrifugal pump are determined from an exp...

The performance characteristics of a certain centrifugal pump are determined from an experimental setup similar to that shown in Fig. 11.7. When the flowrate of a liquid (SG = 0.9) through the pump is 120 gpm, the pressure gage at (1) indicates a vacuum of 95 mm of mercury, and the pressure gage at (2) indicates a pressure of 80 kPa. The diameter of the pipe at the inlet is 110 mm, and at the exit it is 55 mm. If z₂ - z₁ = 0.5 m, what is the actual head rise across the pump? Explain how you would estimate the pump motor power requirement.