Consider again the pump and piping system of Problem 10.61. Determine the volume flow rate and gate valve loss coefficient for the case of two identical pumps installed in parallel. Consider again the...

Consider again the pump and piping system of

Problem 10.61. Determine the volume flow rate and gate

valve loss coefficient for the case of two identical pumps

installed in parallel.

Consider again the pump and piping system of Problem

10.64. Estimate the percentage reductions in volume flow rate

that occur after (a) 20 years and (b) 40 years of use, if the

pump characteristics remain constant. Repeat the calculation

if the pump head is reduced 10 percent after 20 years of use

and 25 percent after 40 years. (Use the data of Problem 10.63

for increase in pipe friction factor with age.)