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Suppression Exam 2 Practice

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Which Class B foam type is film-forming and fluoroprotein-based?
Correct Answer:
Film forming fluoroprotein foam (FFFP)
Explanation:
The key idea is combining a film-forming capability with a fluoroprotein base. This type uses a protein foam foundation blended with fluorinated surfactants, which lowers surface tension and creates a stable, spreading film on hydrocarbon fuels. That film blankets the surface quickly, helps separate the fuel from the air, and improves knockdown and recovery resistance—precisely what you want for Class B fires. Among the options, this specific combination is described as film forming fluoroprotein foam. Other foams may be film-forming or fluoroprotein-based, but not both together in this particular formulation, so they don’t fit as well.

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