Assume for the system illustrated in Figure 4-8 that two primary pumps deliver water fro...

Assume for the system illustrated in Figure 4-8 that two primary pumps deliver water from the supply reservoir. (a) Plot pump curves for pumps 1 and 2 from the head-discharge data that follows. (b) Plot the head-discharge curve for pumps 1 and 2 operating in parallel. The combined head curve can be determined by adding the individual pump head curves horizontally. (Refer to the discussion of parallel operation of constant-speed pumps associated with Figure 4-16.) (c) Plot the estimated system head-discharge curve from the data that follows. (d) Locate the point on the pump head-discharge curve when the demand for water is 1500 gpm (mean summer usage), 2160 gpm (maximum daily usage), and 3600 gpm (maximum daily usage plus fire demand).