$12\mathrm{.}21$ WP A centrifugal pump having the characteristics shown in Example $12\mathrm{.}4$ is used to pump water between two large open tanks through $100$ ft of $8-$in$.-$diameter pipe. The pipeline contains four

ANS:

$Q=1760Gpm$

regular flanged $90$ elbows, a check valve, and a fully open globe valve. Other minor losses are negligible. Assume the friction factor $f=0\mathrm{.}02$ for the $100-ft$ section of pipe. If the static head $($difference in height of fluid surfaces in the two tanks$)$ is $30$ ft $,$ what is the expected flowrate? Do you think this pump is a good choice? Explain.