Discuss NFPA CWBSP Exam Topic 3 Question 30

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?

A16 psi (1.1 bar)

B25 psi (1.7 bar)

C30 psi (2.1 bar)

D50 psi (3.4 bar)

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.

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22 comments · newest first

Margart 2 days ago

I think it's B) 25 psi.

Ligia 7 days ago

This question is tricky.

Ronny 12 days ago

I feel D) 50 psi is overkill for this scenario.

Gilma 17 days ago

Exactly! But B) seems safer for CMSA.

Gertude 23 days ago

Why C)? More height means more pressure, right?

Ruth 28 days ago

I lean towards C) 30 psi.

Regenia 1 month ago

I think it's B) 25 psi.

Pok 1 month ago

This question is tricky.

Art 1 month ago

Totally agree, 25 psi (1.7 bar) makes sense for that height!

Francoise 2 months ago

The minimum is actually 16 psi (1.1 bar) for that setup.

Tracey 2 months ago

Wait, is it really 50 psi (3.4 bar)? That seems excessive!

Jaime 2 months ago

I thought it was higher, like 30 psi (2.1 bar).

Stephen 2 months ago

It's definitely 25 psi (1.7 bar) for CMSA!

Aileen 2 months ago

Yeah, 25 psi sounds just right for CMSA.

Georgiana 2 months ago

The minimum is actually 16 psi for that setup.

Augustine 3 months ago

Wait, is it really 30 psi? Seems a bit much.

Charlesetta 3 months ago

Definitely not 50 psi, that's way too high!

Wenona 3 months ago

I think it's 25 psi for that height.

Cecily 3 months 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?

Julianna 3 months 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.

Carylon 4 months 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.

Raina 5 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.

NFPA CWBSP Exam - Topic 3 Question 30 Discussion