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NFPA CWBSP Exam - Topic 3 Question 30 Discussion

What is the minimum design pressure for control mode specific application (CMSA) protection of a solid piled, Class IlI commodity stored 35 ft (11 m) high in a 40 ft (12 m) building?
B) 25 psi (1.7 bar)
A) 16 psi (1.1 bar)
C) 30 psi (2.1 bar)
D) 50 psi (3.4 bar)

NFPA CWBSP Exam - Topic 3 Question 30 Discussion

Actual exam question for NFPA's CWBSP exam
Question #: 30
Topic #: 3
[All CWBSP Questions]

What is the minimum design pressure for control mode specific application (CMSA) protection of a solid piled, Class IlI commodity stored 35 ft (11 m) high in a 40 ft (12 m) building?

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Suggested Answer: B

For CMSA protection of solid piled Class III commodities stored up to 35 ft high in a building, a minimum design pressure of 25 psi is a typical requirement. This pressure ensures adequate water distribution and penetration for the depth and height of the storage.


by Barrett at May 17, 2026, 01:09 PM

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Wenona
2 hours ago
I think it's 25 psi for that height.
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Cecily
5 days ago
I remember discussing that Class III commodities have specific requirements, but I can’t remember if that means higher or lower pressure. Could it be 50 psi?
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Julianna
10 days ago
I’m a bit confused about the calculations for CMSA. I feel like I should remember the specific formula for this, but I can’t recall it right now.
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Carylon
16 days ago
I practiced a similar question where the height was a factor, and I think it was around 30 psi. I’m leaning towards option C.
upvoted 0 times
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Raina
2 months ago
I think the minimum design pressure might be around 25 psi, but I’m not entirely sure. I remember something about height affecting pressure.
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