NFPA CFPS Exam - Topic 3 Question 5 Discussion

Actual exam question for NFPA's CFPS exam

Question #: 5
Topic #: 3

[All CFPS Questions]

What is the minimum operating design pressure for a K-16.8 (240) ESFR spunkier protecting double-row rack storage of a Class IV encapsulated or unencapsulated commodity stored 20 ft high in a 35 ft high building?

A20 psi (1.4 bar)

B35 psi (2.4 bar)

C52 psi (3.6 bar)

D75 psi (5.2 bar)

Show Suggested Answer

Suggested Answer: C

by Yolando at Feb 08, 2025, 07:14 PM

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Maurine

3 months ago

75 psi? That seems excessive for a rack storage!

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Angelyn

3 months ago

Totally agree, 35 psi makes sense here.

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Vi

3 months ago

Wait, are we sure it's not 52 psi? Seems high.

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Shanda

4 months ago

Definitely B, can't go lower with Class IV.

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Pete

4 months ago

Minimum is 35 psi for that setup!

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Francesco

4 months ago

I’m leaning towards 75 psi since it seems like a safe bet for high storage, but I wish I had reviewed this topic more thoroughly.

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Eulah

4 months ago

I remember something about needing at least 52 psi for certain configurations, especially with double-row racks. Could that be the answer?

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Fabiola

4 months ago

I practiced a similar question about ESFR systems, and I feel like 35 psi might be the right choice, but I’m not completely sure.

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Kayleigh

5 months ago

I think the minimum operating design pressure for ESFR sprinklers is usually higher for Class IV commodities, but I can't remember the exact number.

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Dana

5 months ago

Alright, time to put my problem-solving skills to the test. I'll start by breaking down each component of the question and then work through the calculations methodically.

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Macy

5 months ago

This is right in my wheelhouse! I've got the NFPA standards memorized, so I should be able to quickly calculate the minimum operating design pressure based on the given details.

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Martina

5 months ago

Ugh, I'm not sure I fully understand all the terminology in this question. ESFR spunkier? Rack storage? I'm going to have to review my notes carefully before attempting this.

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Annmarie

5 months ago

Okay, let's see. The key information seems to be the K-factor of the ESFR spunkier, the storage height, and the building height. I think I can work through this step-by-step to find the right answer.

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Carin

5 months ago

Hmm, this looks like a pretty technical question. I'll need to carefully review the details about the ESFR spunkier, rack storage, and building height to determine the minimum operating design pressure.

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William

1 year ago

Ah, the joys of fire protection engineering questions. It's like a treasure hunt, but instead of finding buried treasure, you get to find the right pressure value. Exciting stuff!

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Mabelle

1 year ago

I see your point, but I still think A) 20 psi (1.4 bar) makes more sense based on the design pressure requirements

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Tabetha

1 year ago

I disagree, I believe the correct answer is C) 52 psi (3.6 bar)

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Hillary

1 year ago

Hmm, I think I remember learning about this in my fire protection class. Time to dust off the old textbook and see if I can figure out the right answer.

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Shantay

11 months ago

Hmm, I'll have to double-check my textbook to be sure

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Margot

11 months ago

Actually, I think it's 75 psi (5.2 bar)

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Malcom

12 months ago

No, I believe it's 35 psi (2.4 bar)

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Kristin

12 months ago

I think the minimum operating design pressure is 52 psi (3.6 bar)

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Mabelle

1 year ago

I think the answer is A) 20 psi (1.4 bar)

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Josephine

1 year ago

Okay, let's see. 20 ft high storage in a 35 ft building? That sounds like a pretty standard setup. But all these pressure values... I'm going to have to break out the calculator for this one.

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Lorita

11 months ago

That seems more reasonable for the design pressure.

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Lucille

12 months ago

B) 35 psi (2.4 bar)

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Kristofer

12 months ago

Hmm, I think it might be higher than that.

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Mabel

12 months ago

A) 20 psi (1.4 bar)

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Roxane

1 year ago

Wait, what? ESFR spunkier? Is that some kind of new-age fire suppression system I'm unaware of? I feel like I need a translator just to understand this question.

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Golda

1 year ago

User 2

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Denny

1 year ago

User 1

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