What is a fire stream produced from a fixed-orifice nozzle commonly referred to as?

A fire stream produced from a fixed-orifice nozzle is commonly referred to as a solid stream. This type of nozzle creates a concentrated, unbroken stream of water that maintains its integrity over a distance. Solid streams are particularly effective in suppressing fires because they penetrate deep into the combustion area, allowing for efficient heat absorption and fire control.

The design of a fixed-orifice nozzle determines the flow rate and pressure at which the water is expelled, resulting in a stream that is consistent in diameter and velocity. This quality is essential for maximizing the water's impact on the fire, enabling firefighters to cool down the burning material and reduce the overall heat.

In contrast, other types of streams, such as fog streams, consist of tiny droplets which provide a different method of heat absorption and coverage but are not what is produced by a fixed-orifice nozzle. Deflected and smoke streams do not describe the direct and powerful output that a solid stream provides, adhering instead to other dynamics of fire suppression.