Consider again the pump and piping system of Problem 10.62. Estimate the percentage reductions in volume flow rate that occur after (a) 20 years and (b) 40 years of use, if the pump characteristics...

Consider again the pump and piping system of

Problem 10.62. 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.)