A centrifugal pump having an internal and external diameter of impeller 150 mm and 600 mm, respectively, is running at 800 rpm. It has a constant velocity of flow of 3 m/sec and discharges through the...

A centrifugal pump having an internal and external diameter of impeller 150 mm and 600 mm, respectively, is running at 800 rpm. It has a constant velocity of flow of 3 m/sec and discharges through the pump are 0.03 m3/sec. The diameters of suction and delivery pipes are 100 mm and 75 mm, respectively and suction and delivery heads are 5 m and 25 m of water, respectively. If outlet vane angle is 400 and power required to drive the pump is 15 kW,

determine:

manometric efficiency of the pump.