Which one of the following heads is defined as “the head against which a centrifugal pump has to work” ?
- ASuction head
- BDelivery head
- CStatic head
- DManometric headCorrect
Solution
Concept
Manometric head
Formula
Hm = Hs + Hd + losses
Step-by-step solution
1. The total head the pump must develop, including static lift and losses, is the manometric head.
Explanation
Manometric head is the head against which a centrifugal pump has to work.
Why the other options are wrong
Suction head and delivery head are parts of it, and static head excludes the losses.
Shortcut
Manometric head = total head against which the pump works.
Common mistake
Choosing static head.
Correct answer: D) Manometric head