Which option correctly identifies the common term for foam concentrates used for polar solvents?

Which option correctly identifies the common term for foam concentrates used for polar solvents?

• A. Regular foam
• B. Alcohol-resistant foam
• C. Aqueous Film-Forming Foam
• D. Protein foam

Answer: (B)

Alcohol-resistant foam is the term used for foam concentrates designed to work with polar solvents. Polar solvents such as alcohols attack standard foams and can break down the protective film, causing the foam to collapse and lose effectiveness. Alcohol-resistant foams include additives that resist these solvents, maintaining a stable foam blanket on surfaces covered with alcohol, acetone, or other polar solvents. This makes them the appropriate choice for fires involving polar solvents, unlike regular foam, AFFF, or protein foams, which don’t hold up as well in those conditions.

Alcohol-resistant foam is the term used for foam concentrates designed to work with polar solvents. Polar solvents such as alcohols attack standard foams and can break down the protective film, causing the foam to collapse and lose effectiveness. Alcohol-resistant foams include additives that resist these solvents, maintaining a stable foam blanket on surfaces covered with alcohol, acetone, or other polar solvents. This makes them the appropriate choice for fires involving polar solvents, unlike regular foam, AFFF, or protein foams, which don’t hold up as well in those conditions.