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Exam CFPS topic 1 question 87 discussion

Actual exam question from NFPA's CFPS
Question #: 87
Topic #: 1
[All CFPS Questions]

What Class would a duct material meet with a flame spread rating of 20, an inside surface smoke development rating of 30, and an outside surface smoke development rating of 45?

  • A. Class 0
  • B. Class 1
  • C. Class 2
  • D. Class 2C
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Suggested Answer: C 🗳️
by gemazyni at April 6, 2025, 3:38 a.m.

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zhagaran
3 weeks, 2 days ago
Selected Answer: B
Class A (or Class 1) is the best fire rating. The flame spread for a Class A fire rating is 25 or lower, and the smoke development does not exceed a maximum of 450. Many facilities require a Class A rating for building materials. For example, hospitals typically require Class A ratings.
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