# Hydraulic Terminology

 Hydraulics The study of fluids at motion and at rest Friction Loss Loss of pressurein hose, fittings, standpipes etc., due to turbulence created between the moving water and the inside surfaces. "The consumption of energy" Gallons Per Minute The quantity of water flowing measured in gallons per minute. "Volume or quantity" Pressure Water force measured in pounds per square inch (psi). "Force" Head Pressure Pressure due to elevation of water, also termed back pressure. The weight of water combined with gravitational force creates pressure. "Pressure generated by elevation" Static Pressure Pressure which exists in a water system when no water is flowing. "Stored pressure energy when water is at rest" Residual Pressure Pressure which remains in a water supply when water is flowing. "Remaining pressure" Flow Pressure Forward velocity pressure at a discharge opening when water is flowing. The rate of flow (velocity) of water as it emerges from a discharge opening. "Forward pressure" Nozzle Pressure The actual pressure which exists at the nozzle of a fire hose or appliance. Discharge Pressure Refers to the pressure which existsat the discharge side of a pump. "Water pressure as it exits the pump" Net Discharge Pressure Refers to the actual pressure created by the pump. The difference between the intake and discharge pressures. "Pressure generated by the pump" Intake Pressure The pressure which exists at the intake side of the pump. "Water supply" Velocity Pressure energy directed in a given direction. Usually measured in feet per second. "The speed at which water travels" Nozzle Reaction When water is discharged from a nozzle, a reaction in the opposite the flow takes place at the nozzle, this results in a recoil or "Kick Back" AuthorJonnick112 ID120882 Card SetHydraulic Terminology DescriptionHydraulic Terminology SKFR Updated2011-12-05T15:00:47Z Show Answers