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NFPA CFPS Exam - Topic 3 Question 28 Discussion

What is the occupancy factor used by the Insurance Services Office (ISO) for computing required fire flow for C-3 (Combustible)?
B) 0.85
A) 0.75
C) 1.00
D) 1.15

NFPA CFPS Exam - Topic 3 Question 28 Discussion

Actual exam question for NFPA's CFPS exam
Question #: 28
Topic #: 3
[All CFPS Questions]

What is the occupancy factor used by the Insurance Services Office (ISO) for computing required fire flow for C-3 (Combustible)?

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Suggested Answer: B

The occupancy factor used by the Insurance Services Office (ISO) for computing required fire flow for C-3 (Combustible) is 0.85. This means that the combustible occupancy has a moderate fire load and requires 85% of the fire flow calculated for the same building with an ordinary occupancy. The occupancy factor reflects the influence of the contents and activities within the building on the potential fire severity.The ISO assigns different occupancy factors for different types of occupancies, ranging from 0.60 for low fire load to 1.75 for high fire load12


Guide For Determination Of Required Fire Flow 06-06-20141

Guide For Determination Of Required Fire Flow 07-20052

by Frank at Jul 16, 2026, 05:50 PM

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Raylene
1 day ago
I agree, 1.00 makes sense for combustible materials.
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Sophia
6 days ago
Wait, are you sure? That seems high.
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Evangelina
11 days ago
Definitely 1.00, that's standard.
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Rodrigo
17 days ago
I thought it was 0.85!
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Elroy
22 days ago
It's 1.00 for C-3, right?
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Altha
27 days ago
I remember discussing the different occupancy factors, and I think C-3 was 1.00. It just makes sense for combustible materials.
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Bethanie
1 month ago
I honestly can't recall the exact number. I thought it was either 0.75 or 1.15, but I’m not confident.
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Veronika
1 month ago
I feel like I practiced a question similar to this, and it might have been 0.85. That seems familiar.
upvoted 0 times
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Yolande
1 month ago
I think the occupancy factor for C-3 is 1.00, but I'm not entirely sure. I remember it being a standard value.
upvoted 0 times
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