Class A foam concentrate is sometimes referred to as _____.

Class A foam concentrate is sometimes referred to as _____.

• A. AFFF
• B. Wet water
• C. Aqueous film forming foam
• D. Foam concentrate

Answer: (B)

Class A foam concentrates are formulated to turn water into a much more effective wetting agent. The resulting solution is often called wet water because it greatly lowers surface tension and soaks into ordinary combustibles—like wood and paper—more thoroughly, providing better cooling and soaking to prevent reignition. AFFF and the term “aqueous film forming foam” refer to concentrates designed for hydrocarbon fuels and work by forming an film on the surface, which isn’t the primary mechanism for Class A fires. “Foam concentrate” is a broad, generic label and doesn’t specify the wetting action that defines Class A foams.

Class A foam concentrates are formulated to turn water into a much more effective wetting agent. The resulting solution is often called wet water because it greatly lowers surface tension and soaks into ordinary combustibles—like wood and paper—more thoroughly, providing better cooling and soaking to prevent reignition.

AFFF and the term “aqueous film forming foam” refer to concentrates designed for hydrocarbon fuels and work by forming an film on the surface, which isn’t the primary mechanism for Class A fires. “Foam concentrate” is a broad, generic label and doesn’t specify the wetting action that defines Class A foams.