A pump is used to transfer water between two open tanks. The downstream tank is 12.5 meters above the first tank. 22 meters of 6-inch diameter schedule 40 steel pipe connects the two tanks. The pump characteristics are shown in the figure. Find the flow rate and pump efficiency? Neglect minor losses. Head, m 45 40 35 30 25 20 15 + 10 5 0.1 0.2 0.3 Flow rate, m/s 0.4 pump head *efficiency 0.5 0.6 90 80 70 60 50 40 30 20 10 0 efficiency, %