3.41 The pumping system shown in Fig. 3.54 must have a pressure of 5 psi in the discharge line when cavitation is incipient at the pump inlet. Calculate the length of pipe from the reservoir to the pump for this operating condition if the loss in this pipe can be expressed as (V2/2g) (0.03 L/D). What horsepower is being supplied to the fluid by the pump? What percent of this power is being used to overcome losses? The harometer reads 30-in. Hg. Figure 3.54 Problem 3.41. 2-in. diam 6-in. diam P 4-in 10 ft discharge pipe. Water 68°F