Cooling water is pumped from a reservoir to rock drills on a construction job using the pipe system shown. The flow rate must be \(600 \mathrm{gpm}\) and water must leave the spray nozzle at \(120 \mathrm{ft} / \mathrm{s}\). Calculate the minimum pressure needed at the pump outlet. Estimate the required power input if the pump efficiency is 70 percent.

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Pump- Pipe, D=4 in. (aluminum) Total length: L= 700 ft Joints: 15, each with Kjoint = 1 V = 120 ft/s 400 ft Gate valve, open P8.137