Ex. 1.13] A pump draws water from reservoir A and lifts it to reservoir B as shown in the figure. The loss of head from A to 1 is three times the velocity head in the 15.24-cm pipe and loss of head from 2 to B is 20 times the velocity head in the 101.6-mm pipe. The pump discharge rate is 40 Ips. Determine the following: a) Pump head b) Pump theoretical power c) Pump brake power if the pump efficiency is 78%

a) Develop an equation for the head (in ft) developed by the pump described by the chartas a function of flow rate (in gpm) when the pump uses a 9 ¾” impeller. b) Develop an equation for the pump efficiency as a function of flow rate (gpm) when the pump uses a 9 ¾” impeller.

A pump has overall efficiency of 70 %. It delivers 90 Ipm at 1000 rpm and 700 N/cm". If the prime mover input torque is 12 KN-cm, calculate a) the actual torque of the pump b) volumetric displacement in cm". Comment on the significance of torque in pumps. A BI