What type of nozzle produces a solid stream?

A smooth-bore nozzle is designed to create a solid stream of water, which is beneficial for certain firefighting applications. This type of nozzle features a simple design without any moving parts or mechanisms to create patterns or spray. Instead, it allows water to flow out in a concentrated, cylindrical stream, which provides greater reach and penetration.

The solid stream produced by a smooth-bore nozzle is particularly effective for achieving a high velocity of water, which can help to extinguish fires more efficiently under specific conditions. This type of stream is less affected by wind, making it advantageous in outdoor situations where controlling the flow and direction of water is critical.

In contrast, other nozzles such as fog nozzles and adjustable nozzles focus on creating various spray patterns, which are useful in different firefighting scenarios but do not produce a solid stream. The fog streams, for example, disperse water into multiple droplets for cooling and exposure protection rather than delivering a concentrated stream for penetration into the fire.