Question

A fireboat draws seawater SG=1.025 from submerged pipe and discharges it through a nozzle. The total head loss is 6.5ft. if the pump efficiency is 75%, what horsepower motor is required to drive it?

Answer 1

solution

n=0.75

h_f=6.5ft

SG=1.025

D₁=6in

D₂=2in

z₁=6ft

v₂=120ft/s 

6/2*6.5/6*120/1.025/0.75 =190