Question: A $32 mathrm{hp}$ pump ( $100 %$ efficient) is required to pump water through a 2 in. sch 40 pipeline, $6000 mathrm{ft}$ long, at a

A $32 \mathrm{hp}$ pump ( $100 %$ efficient) is required to pump water through a 2 in. sch 40 pipeline, $6000 \mathrm{ft}$ long, at a rate of $100 \mathrm{gpm}$.

(a) What is the equivalent roughness of the pipe?

(b) If the pipeline is replaced by new commercial steel $2 \mathrm{in}$. sch 40 pipe, what power would be required to pump water at a rate of $100 \mathrm{gpm}$ through this pipe? What would be the percentage saving in power compared to the old pipe?

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