Fog nozzles are not recommended for use with protein and fluoroprotein foam.

• A. True
• B. False
• C. Only with high pressure
• D. Only with a handline

Answer: (B)

Fog patterns are used to deliver foam solutions over a wide area, creating a stable, blankets-like layer that cools and separates fuel from the air. Protein and fluoroprotein foams rely on a consistent, expansive foam blanket to perform effectively, and a fog nozzle helps achieve that coverage without excessively shearing the foam solution. When applied at the recommended pressures and flow rates specified by the foam manufacturer, fog nozzles can work well with these concentrates, providing rapid coverage and cooling. So, saying fog nozzles should not be used with protein and fluoroprotein foam isn’t correct. It’s important to follow the foam’s guidelines for nozzle type and application to ensure best foam quality, rather than restricting the nozzle to high pressure or to handlines only.