Manometric head of a centrifugal pump: Equivalent definitions Select the most comprehensive correct statement for manometric head H_m relative to lifts, losses, and energy change between impeller inlet and outlet. Choose the correct option.

Difficulty: Easy

H_m = Suction lift + friction loss in suction + Delivery lift + friction loss in delivery + velocity head in delivery pipe
H_m = (Work done per kN of water by the impeller) − (Losses within the impeller)
H_m = (Specific energy at impeller outlet) − (Specific energy at impeller inlet)
All of the above

Correct Answer: All of the above

Explanation:

Concept/Approach

Manometric head is the effective head imparted by the pump, accounting for elevation difference, frictional losses in suction/delivery, and velocity head (delivery side).
It can also be expressed by energy (per unit weight) change across the impeller, net of internal losses.

Therefore
All three representations are consistent views of the same head term in different forms.

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