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NFPA CWBSP Exam - Topic 4 Question 29 Discussion

Actual exam question for NFPA's CWBSP exam

Question #: 29
Topic #: 4

[All CWBSP Questions]

Antifreeze systems that contain a backflow preventer between the antifreeze piping and the wet pipe system must be

equipped with

Aa relief valve.

Ba sight glass.

Can accelerator.

Dan expansion chamber.

Show Suggested Answer

Suggested Answer: D

Antifreeze systems equipped with a backflow preventer must include an expansion chamber to accommodate the expansion of the antifreeze solution due to temperature changes. This prevents excessive pressure buildup that could damage the system or cause unintended discharge.

by Tamekia at May 07, 2026, 08:11 AM

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Vallie

2 hours ago

Wait, are you sure about that? I thought it was B) a sight glass.

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Sylvie

5 days ago

Totally agree, relief valves are essential!

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Gussie

10 days ago

Gotta go with A) a relief valve.

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Roxane

16 days ago

I’m really uncertain here. I thought it was an accelerator, but now I’m second-guessing myself.

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Gail

2 months ago

I feel like we had a practice question about this, and it was about expansion chambers. Could that be the right choice?

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Cherelle

2 months ago

I remember discussing backflow preventers, but I can't recall if they specifically need a sight glass or something else.

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Sommer

2 months ago

I think the answer might be A) a relief valve, but I'm not entirely sure. We covered something similar in class.

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