Hydraulics and Fluid Mechanics in ME
A manometer is used to measure

Pressure in pipes and channels
Atmospheric pressure
Pressure in Venturimeter
Difference of pressures between two points in a pipe

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Hydraulics and Fluid Mechanics in ME
Manometric head, in case of a centrifugal pump, is equal to

Suction lift + Loss of head in suction pipe due to friction + Delivery lift + Loss of head in delivery pipe due to friction + Velocity head in the delivery pipe
Work-done per kN of water Losses within the impeller
All of these
Energy per kN at outlet of impeller Energy per kN at inlet of impeller

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