NFPA CWBSP Exam - 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?

A4.52 psi (0.31 bar)

B9.22 psi (0.63 bar)

C16.38 psi (1.13 bar)

D36.86 psi (2.54 bar)

Show Suggested Answer

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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Zena

6 months ago

How do we know the K-factor is accurate?

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Daniela

6 months ago

I agree with C, seems like the right pressure for 17 gpm.

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Hannah

6 months ago

Wait, 36.86 psi seems way too high for that flow rate!

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Tamra

7 months ago

I think it's definitely option C.

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Basilia

7 months ago

The K-factor is key for calculating pressure!

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Hubert

7 months ago

I feel like I should be able to solve this, but the numbers are throwing me off. I might just guess and go with option B since it seems reasonable.

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Orville

7 months ago

I vaguely recall that the formula involves multiplying the K-factor by the square of the flow rate. I hope I remember it correctly for this question!

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Nguyet

7 months ago

I think I practiced a similar question where we had to find pressure based on flow rate and K-factor. I might be leaning towards option C, but I’m not completely confident.

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Shenika

8 months ago

I remember something about the K-factor and how it relates to flow rate, but I'm not sure how to calculate the pressure needed.

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Charlette

8 months ago

This seems like a standard sprinkler system pressure calculation. I'm confident I can work through this step-by-step and arrive at the right answer.

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Vernice

8 months ago

Wait, what units are we working in? I want to make sure I convert everything properly before trying to solve this.

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Keith

8 months ago

Okay, I think I've got this. I just need to plug in the given values and solve for the pressure. Shouldn't be too difficult.

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Leslie

8 months ago

Hmm, I'm a bit unsure about this one. I'll need to review the K-factor formula and make sure I'm applying it correctly.

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Bulah

8 months ago

This looks like a straightforward hydraulics problem. I'll need to use the K-factor formula to solve for the required pressure.

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Fernanda

1 year 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

1 year ago

D) 36.86 psi (2.54 bar) would have been way too high for this scenario.

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Bettina

1 year ago

C) 16.38 psi (1.13 bar) seemed like a reasonable choice to me.

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Reyes

1 year ago

I think it's important to calculate the pressure accurately for sprinkler systems.

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Jaime

1 year ago

I agree, 4.52 psi (0.31 bar) is the correct pressure.

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Georgene

1 year ago

B) I thought it was 9.22 psi (0.63 bar), but I guess I was wrong.

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Aracelis

1 year ago

A) 4.52 psi (0.31 bar) is the correct answer. Good job!

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Cecily

1 year 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

1 year ago

Josefa: I guess we'll find out soon enough.

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Michel

1 year ago

User 3: D) 36.86 psi (2.54 bar) seems like the right choice.

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Josefa

1 year ago

User 2: I'm going with A) 4.52 psi (0.31 bar).

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Nichelle

1 year ago

User 1: I think the answer is C) 16.38 psi (1.13 bar).

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Justine

2 years ago

I'm not sure, but I think I'll go with D) 36.86 psi (2.54 bar)

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Brande

2 years ago

I agree with Paris, because the formula for pressure is flow rate divided by K-factor

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Golda

2 years 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

2 years 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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