Raj Process Equipments And System Interview Questions and Answers

NPSH stands for Net Positive Suction Head, a measure of the pressure available at the suction port of a pump.

• NPSH is important for ensuring that a pump does not cavitate, which can damage the pump and reduce efficiency.

• It is calculated by subtracting the vapor pressure of the liquid from the total suction head.

• NPSH is typically provided by the pump manufacturer and must be greater than the required NPSH for the pump to

Different types of pumps include centrifugal pumps, positive displacement pumps, and diaphragm pumps.

• Centrifugal pumps use a rotating impeller to create flow and increase pressure.

• Positive displacement pumps move fluid by trapping a fixed amount and forcing it through the discharge.

• Diaphragm pumps use a flexible diaphragm to create suction and discharge fluid.