A nozzle's a mechanical device designed to control the characteristics of a fluid flow as it exits (or enters) an enclosed chamber or pipe via an orifice. A nozzle's often a pipe or tube of varying cross sectional area, and it can be used to direct or modify the flow of a fluid (liquid or gas). Nozzles are frequently used to control the rate of flow, speed, direction, mass, shape, and/or the pressure of the stream that emerges from them. Types of nozzles Jets A gas jet, fluid jet, or hydro jet'… (More on Nozzle)