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NFPA Exam CWBSP Topic 2 Question 3 Discussion

Actual exam question for NFPA's CWBSP exam
Question #: 3
Topic #: 2
[All CWBSP Questions]

A 4.2 K-factor sprinkler must deliver 17 gpm (692 mm/min). What pressure is required?

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Suggested Answer: B

To deliver 17 gpm with a 4.2 K-factor sprinkler, approximately 9.22 psi pressure is required. This is calculated using the sprinkler's K-factor formula, which relates flow rate, pressure, and the K-factor.


by Ruthann at Nov 13, 2024, 08:05 PM

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Fernanda
7 months ago
A) 4.52 psi (0.31 bar) is the way to go. I can already feel the water pressure coursing through my veins. Bring on the next question!
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Sheridan
6 months ago
D) 36.86 psi (2.54 bar) would have been way too high for this scenario.
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Bettina
6 months ago
C) 16.38 psi (1.13 bar) seemed like a reasonable choice to me.
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Reyes
6 months ago
I think it's important to calculate the pressure accurately for sprinkler systems.
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Jaime
7 months ago
I agree, 4.52 psi (0.31 bar) is the correct pressure.
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Georgene
7 months ago
B) I thought it was 9.22 psi (0.63 bar), but I guess I was wrong.
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Aracelis
7 months ago
A) 4.52 psi (0.31 bar) is the correct answer. Good job!
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Cecily
8 months ago
Hmm, I'm gonna go with D) 36.86 psi (2.54 bar). Bigger is better, right? Just like my ego after acing this exam.
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Mattie
6 months ago
Josefa: I guess we'll find out soon enough.
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Michel
6 months ago
User 3: D) 36.86 psi (2.54 bar) seems like the right choice.
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Josefa
7 months ago
User 2: I'm going with A) 4.52 psi (0.31 bar).
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Nichelle
7 months ago
User 1: I think the answer is C) 16.38 psi (1.13 bar).
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Justine
8 months ago
I'm not sure, but I think I'll go with D) 36.86 psi (2.54 bar)
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Brande
8 months ago
I agree with Paris, because the formula for pressure is flow rate divided by K-factor
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Golda
8 months ago
I think B) 9.22 psi (0.63 bar) is the right answer. Gotta love these sprinkler questions, they really get the blood flowing!
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Yuriko
8 months ago
C) 16.38 psi (1.13 bar) seems like the correct answer. The K-factor and flow rate are given, so we can plug those into the formula to solve for the pressure.
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Barney
7 months ago
Looks like option C is the correct answer then.
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Devon
7 months ago
That would give us 16.38 psi, which matches option C.
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Lavonne
8 months ago
So, for this problem, it would be 4.2 multiplied by the square root of 17.
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Ilene
8 months ago
I think the formula to calculate pressure is K-factor multiplied by the square root of the flow rate.
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Paris
8 months ago
I think the answer is C) 16.38 psi (1.13 bar)
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