Practice question

A material that is 'polar' or water-soluble (miscible) is important to identify because, in a fire, it may require:

  1. No foam at all
  2. Alcohol-resistant (AR) foam rather than standard AFFF, which can break down on polar solvents
  3. Only dry sand
  4. Pressurized water alone with no concern

Answer: B — Alcohol-resistant (AR) foam rather than standard AFFF, which can break down on polar solvents

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