What are the available patterns for a vari-nozzle?

A vari-nozzle is designed to provide flexibility in controlling the flow and pattern of water for firefighting or damage control operations. The correct answer indicates that the available patterns for a vari-nozzle include 60°, 30°, and stream patterns.

In firefighting, using different nozzle patterns is crucial because each pattern serves a specific purpose depending on the circumstances. The stream pattern is typically used for straight-line coverage and effective penetration of heat, helpful in effectively reaching the seat of a fire. On the other hand, the 30° and 60° patterns refer to various spray angles. The 30° pattern may provide a wider coverage area but with less water volume per square foot, while the 60° pattern delivers a more targeted approach useful for specific situations.

Having a choice between these patterns allows firefighters to adapt their response based on the fire's behavior, environment, and the material involved in the fire scenario, maximizing their effectiveness in extinguishing the fire.