If the viscosity of the liquid is not too high (e.g., less than about $100 \mathrm{cP}$ ), the performance of many centrifugal pumps is not very sensitive to the fluid viscosity. You have a pump with an $8 \mathrm{in}$. diameter impeller that develops a pressure of $15 \mathrm{psi}$ and consumes $1.5 \mathrm{hp}$ when running at $1150 \mathrm{rpm}$ pumping water at a rate of $100 \mathrm{gpm}$. You also have a similar pump with a $13 \mathrm{in}$. diameter impeller, driven by a $1750 \mathrm{rpm}$ motor, and you would like to know what pressure that pump would develop with water, and how much power it would take to drive it.

(a) If the second pump is to be operated under conditions similar to that of the first, what should the flow rate be?

(b) When operated at this flow rate with water, what pressure should it develop and what power would be required to drive it?