Question 787 Deck Safety

The correct answer is D) smothering. Foam extinguishes a fire mainly by smothering the fire, depriving it of oxygen. Foam forms a blanket over the burning material, preventing oxygen from reaching the fire and causing it to be extinguished. This smothering action is the primary mechanism by which foam suppresses the fire. The other options are incorrect because: A) Cooling - While foam can have a cooling effect, this is not the main mechanism by which it extinguishes a fire. B) Chemical action - Foam does not primarily use chemical action to put out fires. C) Inerting the air - Foam does not work by displacing or inertizing the air around the fire.