Question

Piezometric head is the sum of:
1. Pressure head, datum head and velocity head
2. Datum head and velocity head
3. Pressure head and velocity head
4. Pressure head and datum head

Answer 1

Correct Answer - Option 4 : Pressure head and datum head

Explanation:

The total energy of a flowing fluid can be represented in terms of head, which is given by

\(\frac{p}{ρ{g}}\;+\;\frac{V^2}{2g}\;+\;z\;\)

The sum of the pressure head and datum head is called the piezometric head. It is given by 

Piezometric head = \(\mathbf{\frac{P}{ρ{g}}+z}\)

where \(\frac{P}{\rho g}\) = pressure energy per unit weight or pressure head

\(V^2\over{2g}\)= kinetic energy per unit weight or kinetic energy head

z = potential energy per unit weight or elevation head.