NFPA CWBSP Exam - Topic 2 Question 25 Discussion

Actual exam question for NFPA's CWBSP exam

Question #: 25
Topic #: 2

[All CWBSP Questions]

What standard applies for underground malleable iron threaded fittings of Class 150?

AASME B16.1

BASME B16.3

CASME B16.4

DASME B16.5

Show Suggested Answer

Suggested Answer: B

ASME B16.3 is the standard that applies to malleable iron threaded fittings of Class 150, which are commonly used in piping systems, including those for fire protection. This standard covers dimensions, tolerances, and material requirements for these types of fittings.

by Katheryn at Jan 05, 2026, 05:16 AM

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Silvana

2 months ago

D) ASME B16.5 doesn’t seem right. That’s for flanges, not fittings.

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Arlette

2 months ago

I’m leaning towards C) ASME B16.4. It’s about malleable iron.

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Craig

3 months ago

I feel it's A) ASME B16.1. It covers cast iron, which fits.

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Frederic

3 months ago

I think it's B) ASME B16.3. Seems right for threaded fittings.

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Rory

3 months ago

Wait, are you all sure about this? Sounds off to me.

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Frankie

3 months ago

Really? I always thought it was B16.4.

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Terrilyn

3 months ago

Definitely B16.3, that's the standard for those fittings.

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Luisa

3 months ago

I thought it was B16.1, but I guess not.

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Fletcher

4 months ago

It's B) ASME B16.3 for sure!

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Isreal

4 months ago

ASME B16.3 all the way! I can almost smell the threaded fittings from here.

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Meghan

4 months ago

Hmm, I'm not sure, but I'll go with ASME B16.3 since it's specifically for threaded fittings.

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Aleisha

5 months ago

ASME B16.5 seems like the most logical choice here. That's the standard for pipe flanges and flanged fittings.

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Veronika

5 months ago

I think the answer is ASME B16.4. That's the standard for malleable iron fittings, right?

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Stephaine

5 months ago

ASME B16.3 is the correct answer. I'm confident about this.

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Jame

5 months ago

I feel like ASME B16.3 is the right answer, but I need to double-check if it specifically mentions Class 150 fittings.

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Melinda

5 months ago

I’m confused between B16.1 and B16.5. I thought B16.1 was for cast iron, but I can't recall the specifics for malleable iron.

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Suzan

5 months ago

I practiced a similar question last week, and I believe it was ASME B16.4 for underground fittings.

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Zack

6 months ago

I think it might be ASME B16.3, but I'm not entirely sure. I remember something about that standard covering fittings.

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Weldon

6 months ago

This question is testing my knowledge of the ASME B16 standards. I think the key is to focus on the specific criteria provided - underground malleable iron threaded fittings of Class 150. I'll carefully consider each option and try to match that up with my understanding of the standards.

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Carman

6 months ago

Wait, I'm confused. Is it ASME B16.1, B16.3, B16.4, or B16.5? I know the ASME B16 standards cover fittings, but I'm not sure which one is specific to the details given in the question. I'll have to review my notes and try to eliminate the options.

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Ezekiel

6 months ago

Okay, I've got this. Based on the information provided, the correct answer is ASME B16.3. That standard covers malleable iron threaded fittings, and Class 150 is a common pressure rating for these types of fittings used underground. I'm confident in this response.

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Timothy

6 months ago

Hmm, I'm a bit unsure about this one. I know the ASME B16 standards cover different types of fittings, but I can't quite remember which one is for underground malleable iron threaded fittings of Class 150. I'll have to think this through carefully.

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Lera

7 months ago

This seems like a straightforward question about standards for threaded fittings. I'll need to review my notes on ASME B16 standards to determine which one applies for the given criteria.

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Linsey

10 days ago

ASME B16.4 sounds right to me.

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Marge

16 days ago

I’m leaning towards ASME B16.1.

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Malcom

2 months ago

I think it's ASME B16.3.

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