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NFPA Exam CWBSP Topic 1 Question 8 Discussion

Actual exam question for NFPA's CWBSP exam
Question #: 8
Topic #: 1
[All CWBSP Questions]

How much pressure is lost to friction as 1,200 gpm (4542 L/min) travels through 200 ft (61 m) of 5 in. (130 mm) schedule 40 steel pipe with a C-factor of 120?

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Suggested Answer: C

The pressure loss due to friction for 1,200 gpm traveling through 200 ft of 5 in. schedule 40 steel pipe with a C-factor of 120 is approximately 21 psi (1.45 bar). This calculation takes into account the flow rate, pipe length, diameter, and roughness factor.


by Horace at Jan 15, 2025, 10:43 PM

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Francine
2 months ago
This is a trick question, right? The answer is definitely E) All of the above. Friction, the universal constant in fluid dynamics.
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Nicolette
10 days ago
User 4: D) 19 psi (1.31 bar)
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Cassie
25 days ago
User 3: C) 21 psi (1.45 bar)
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Coletta
28 days ago
User 2: B) 24 psi (1.65 bar)
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Leanna
1 months ago
User 1: A) 28 psi (1.9 bar)
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Vinnie
2 months ago
A) 28 psi (1.9 bar). Gotta love those hydraulic pressure drops, keeps us on our toes!
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Mabel
27 days ago
D) 19 psi (1.31 bar). The C-factor really plays a big role in pressure loss calculations.
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Jean
28 days ago
C) 21 psi (1.45 bar). It's important to consider friction when designing a system.
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Gracie
1 months ago
B) 24 psi (1.65 bar). Yeah, it's always a challenge to calculate pressure loss in pipes.
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Cammy
1 months ago
A) 28 psi (1.9 bar). Gotta love those hydraulic pressure drops, keeps us on our toes!
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Ressie
3 months ago
But the C-factor is high, so it should be A) 28 psi.
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Yvonne
3 months ago
I disagree, I believe it's B) 24 psi.
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Ressie
3 months ago
I think the answer is A) 28 psi.
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Sharen
3 months ago
Hmm, let me see. Okay, I've got it - C) 21 psi (1.45 bar). Friction, you can't live with it, can't live without it.
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Anika
3 months ago
D) 19 psi (1.31 bar). It's all about that pipe roughness, baby! C-factor of 120, no doubt.
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Wei
3 months ago
I'm pretty sure it's B. 24 psi (1.65 bar). Friction is the bane of every hydraulic system, am I right?
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Geraldo
2 months ago
User3: I agree with User2, B) 24 psi (1.65 bar) sounds right
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Sharmaine
2 months ago
User2: I'm going with B) 24 psi (1.65 bar)
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Delpha
2 months ago
User1: I think it's A) 28 psi (1.9 bar)
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