This document discusses water pumps and provides definitions and equations related to pump operation and design. It defines key pump parameters like head, suction head, discharge head, efficiency, net positive suction head (NPSH), and presents diagrams of pump curves showing the relationship between head, flow rate, and efficiency. Key points covered include: - Pumps are hydraulic machines that convert mechanical energy into hydraulic energy in the form of a water column. - Pump head is the energy delivered by the pump and depends on factors like pump efficiency and losses. - NPSH is important for positive suction pumps to avoid cavitation. It depends on system pressure and vapor pressure. - Pump curves graphically

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