A(n) firestopping material expands as it is burned. What type is it?

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Study for the Fire Alarm Lesson 5and6 Test. Prepare with flashcards and multiple choice questions; each question comes with hints and explanations. Gear up for success on your exam!

Multiple Choice

A(n) firestopping material expands as it is burned. What type is it?

Explanation:
Intumescent materials are designed to swell when exposed to heat, forming a protective insulating layer that blocks heat, flame, and smoke from passing through openings. This expansion fills gaps around penetrations as fire develops, which is exactly what’s described in the question. Ablative coatings burn away to reveal or leave behind a residue rather than expanding; cementitious fills stay the same size, and fiberglass does not puff up with heat. So the material that expands as it is heated is the intumescent type.

Intumescent materials are designed to swell when exposed to heat, forming a protective insulating layer that blocks heat, flame, and smoke from passing through openings. This expansion fills gaps around penetrations as fire develops, which is exactly what’s described in the question. Ablative coatings burn away to reveal or leave behind a residue rather than expanding; cementitious fills stay the same size, and fiberglass does not puff up with heat. So the material that expands as it is heated is the intumescent type.

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