Hydraulics and Fluid Mechanics in ME
The total head of a liquid particle in motion is equal to

Pressure head - (kinetic head + potential head)
Kinetic head - (pressure head + potential head)
Potential head - (pressure head + kinetic head)
Pressure head + kinetic head + potential head

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Hydraulics and Fluid Mechanics in ME
Cavitation will begin when

pressure becomes more than critical pressure
pressure is increased
the pressure at any location reaches an absolute pressure equal to the saturated vapour pressure of the liquid
flow is increased

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