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.
Mechanical Engineering
Hydraulic Machines
Difficulty: Easy
Choose an option
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AH_m = Suction lift + friction loss in suction + Delivery lift + friction loss in delivery + velocity head in delivery pipe
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BH_m = (Work done per kN of water by the impeller) − (Losses within the impeller)
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CH_m = (Specific energy at impeller outlet) − (Specific energy at impeller inlet)
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DAll of the above
Answer
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.
ThereforeAll three representations are consistent views of the same head term in different forms.
Final AnswerAll of the above.