Which foam is resistant to dissolution by alcohols and polar solvents?

Study for the North Carolina Fire Operations 9 Test. Prepare with flashcards and multiple choice questions, each question offers hints and explanations. Increase your chances of passing the exam with ease!

Multiple Choice

Which foam is resistant to dissolution by alcohols and polar solvents?

Explanation:
Alcohol-resistant AFFF is designed with additives that keep the foam film intact in the presence of alcohols and polar solvents. This prevents the foam from dissolving and losing its protective film on the fuel surface, which helps maintain coverage and cooling on fires involving solvents or solvent-containing fuels. Standard foams or other types don’t have that resistance, so their foam blankets can break down when exposed to alcohols or polar solvents. That’s why this foam type is the best choice for those situations.

Alcohol-resistant AFFF is designed with additives that keep the foam film intact in the presence of alcohols and polar solvents. This prevents the foam from dissolving and losing its protective film on the fuel surface, which helps maintain coverage and cooling on fires involving solvents or solvent-containing fuels. Standard foams or other types don’t have that resistance, so their foam blankets can break down when exposed to alcohols or polar solvents. That’s why this foam type is the best choice for those situations.

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