The 28-in-diameter pump in Fig. 11.7a at 1170 r/min is used to pump water at 20°C through

Question:

The 28-in-diameter pump in Fig. 11.7a at 1170 r/min is used to pump water at 20°C through a piping system at 14,000 gal/min.
(a) Determine the required brake horsepower. The average friction factor is 0.018.
(b) If there is 65 ft of 12-indiameter pipe upstream of the pump, how far below the surface should the pump inlet be placed to avoid cavitation?