What system combines foam concentrate, water, and compressed air to produce a foam that sticks to vegetation and structures in wildland fires?

What system combines foam concentrate, water, and compressed air to produce a foam that sticks to vegetation and structures in wildland fires?

• A. Aqueous Film Forming Foam
• B. Cafs
• C. Class A foam
• D. Foam concentrate

Answer: (B)

CAFS, or Compressed Air Foam System, is the delivery system that mixes foam concentrate, water, and compressed air to create a thick, expandable foam. The added air turns the mixture into a clingy foam that blankets and sticks to vegetation and structures, giving hail-through cooling and a protective layer that slows flame spread. This foam adheres better than plain water, reducing runoff and making firefighting more efficient by keeping water in place longer and increasing nozzle reach and effectiveness. Aqueous Film Forming Foam is a type of foam concentrate that forms a film on fuels but isn’t defined by using a compressed-air delivery system. Class A foam is another concentrate option, and foam concentrate refers to the material itself, not the air-assisted delivery setup. The system described in the question specifically is CAFS.

CAFS, or Compressed Air Foam System, is the delivery system that mixes foam concentrate, water, and compressed air to create a thick, expandable foam. The added air turns the mixture into a clingy foam that blankets and sticks to vegetation and structures, giving hail-through cooling and a protective layer that slows flame spread. This foam adheres better than plain water, reducing runoff and making firefighting more efficient by keeping water in place longer and increasing nozzle reach and effectiveness. Aqueous Film Forming Foam is a type of foam concentrate that forms a film on fuels but isn’t defined by using a compressed-air delivery system. Class A foam is another concentrate option, and foam concentrate refers to the material itself, not the air-assisted delivery setup. The system described in the question specifically is CAFS.