To increase the head, two pumps from Fig. $10-26$b using $10-$in$.$ impellers will be

connected in series. The pumps will be used in a system where the overall lift is $105$

ft$.$ The pipe has a diameter of $6$ in$.,$ a resistance coefficientf $=0\mathrm{.}018,$ and a length

of $400$ ft$.$ Assume that the minor losses total five velocity heads. Ignore the possibility

of cavitation and determine the actual operating conditions of head, discharge, effi$-$

ciency, and power required$\mathrm{.}10-72.$ To increase the head, two pumps from Fig. $10-26b$ using $10-$in$.$ impellers will be

connected in series. The pumps will be used in a system where the overall lift is $105$

$ft.$ The pipe has a diameter of $6$ in$.,$ a resistance coefficient $f=0\mathrm{.}018,$ and a length

of $400ft.$ Assume that the minor losses total five velocity heads. Ignore the possibility

of cavitation and determine the actual operating conditions of head, discharge, effi$-$

ciency, and power required.