NFPA CWBSP Exam - Topic 3 Question 16 Discussion

Actual exam question for NFPA's CWBSP exam

Question #: 16
Topic #: 3

[All CWBSP Questions]

For a hydraulically calculated light hazard area under a mezzanine constructed of 2 in. (50 mm) x 14 in. (350 mm)

combustible solid wood members spaced 4 ft (1.2 m) on center, what is the maximum protection area for standard

upright spray sprinklers?

A130 ft2 (12.1 m2)

B168 ft2 (15.6 m2)

C200 ft2 (18.6 m2)

D225 ft2 (20.9 m2)

Show Suggested Answer

Suggested Answer: A

For a hydraulically calculated light hazard area under a mezzanine with the given construction and spacing, the maximum protection area per standard upright spray sprinkler is typically around 130 ft (12.1 m), considering the obstructions and distribution challenges posed by the mezzanine structure.

by Piraisudan P at May 26, 2025, 09:54 AM

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Delsie

7 months ago

Nope, it's definitely 130 ft², trust the calculations!

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Geoffrey

7 months ago

Definitely agree with that, 130 ft² sounds right!

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Beata

7 months ago

I thought it was higher, like 168 ft².

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Catarina

7 months ago

Wait, are we sure about that? Seems low for a mezzanine.

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Rasheeda

8 months ago

I think it's 130 ft² for light hazard areas.

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Delisa

8 months ago

I’m leaning towards 168 ft² based on the spacing of the wood members, but I’m not completely confident in that answer.

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Rosio

8 months ago

I feel like I read that the standard protection area for upright sprinklers is often around 225 ft², but I can't recall the specifics for this setup.

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Ulysses

8 months ago

I think we practiced a similar question in class, and I want to say the maximum area is 200 ft², but I could be mixing it up with another scenario.

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Dick

9 months ago

I remember something about the spacing of sprinklers and how it affects the coverage area, but I'm not sure if it's 130 or 168 ft².

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Doug

9 months ago

This is a straightforward hydraulic calculation question. I just need to apply the relevant code requirements for light hazard occupancies with mezzanines. I'm confident I can work through this systematically and arrive at the correct maximum protection area.

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Rebecka

9 months ago

Okay, I think I've got this. The key is determining the appropriate sprinkler type and spacing based on the light hazard classification and mezzanine details. I'll work through the calculations step-by-step to arrive at the right answer.

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Zack

9 months ago

Hmm, I'm a bit unsure about this one. The details on the mezzanine construction seem important, but I'm not sure how that factors into the maximum protection area. I'll have to think through the logic carefully.

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Maryann

9 months ago

This looks like a standard hydraulic calculation question for a light hazard area under a mezzanine. I'll need to review the code requirements for sprinkler spacing and protection area for this type of occupancy.

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Refugia

1 year ago

Wait, did they say the members were made of 'combustible solid wood'? In that case, I'm going with B) 168 ft2 (15.6 m2) to be on the safe side. No need to burn down the whole mezzanine!

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