The mechanical efficiency of a centrifugal pump is the ratio of
1
manometric head to the energy supplied by the impeller per kN of water
2
energy supplied to the pump to the energy available at the impeller
3
actual work done by the pump to the energy supplied to the pump by the prime mover
4
energy available at the impeller to the energy supplied to the pump by the prime mover
5
manometric head to the energy energy available at the impeller