Question

define pressure head, kinetic head, datum head and total head

Answer 1

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$\mathfrak{\blue{Answer→}}$There are four types of head used to calculate the total head in and out of a pump: Velocity head is due to the bulk motion of a fluid (kinetic energy). Itspressure head correspondent is the dynamic pressure. Elevation head is due to the fluid's weight, the gravitational force acting on a column of fluid.
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Answer 2

$pressure \: head$
☯️Pressure head pressure head is the Internal Energy of a Fluid due to the pressure exerted on its container It may also be called static pressure head or simply static head but it is not a static head pressure.✔️

$kinetic \: head$
☯️The energy of flowing water that is a function of its velocity is called kinetic head ✔️

$datum \: head$
☯️Hydraulic head or piezometric head is a specific measurement of liquid pressure above a vertical datum. It is usually measured as a liquid surface elevation, expressed in units of length, at the entrance (or bottom) of a piezometer.✔️

$total \: head \:$
☯️ The sum of the elevation head, pressure head, and velocity head of a liquid. For ground water, the velocity-head component is generally negligible is called total head ✔️