Hydraulics and Fluid Mechanics in ME
The total head of a liquid particle in motion is equal to

Pressure head + kinetic head + potential head
Potential head - (pressure head + kinetic head)
Pressure head - (kinetic head + potential head)
Kinetic head - (pressure head + potential head)

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Hydraulics and Fluid Mechanics in ME
Mechanical efficiency of a centrifugal pump is the ratio of

Energy available at the impeller to the energy supplied to the pump by the prime mover
Energy supplied to the pump to the energy available at the impeller
Actual work-done by the pump to the energy supplied to the pump by the prime mover
Manometric head to the energy supplied by the impeller per kN of water

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