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NFPA Exam CFPS Topic 6 Question 10 Discussion

Actual exam question for NFPA's CFPS exam
Question #: 10
Topic #: 6
[All CFPS Questions]

Potassium bicarbonate is a dry chemical agent considered to be twice as effective as

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Suggested Answer: A

Potassium bicarbonate is a dry chemical agent that is considered to be twice as effective as sodium bicarbonate in fire suppression, especially for Class B fires involving flammable liquids and gases. This is because potassium bicarbonate has a higher melting point and a lower decomposition temperature than sodium bicarbonate, which allows it to form a more stable and insulating layer on the burning surface. Potassium bicarbonate also has a lower pH and a higher specific gravity than sodium bicarbonate, which enhances its penetration and dispersion abilities 123. Reference: Dry Chemical Agents - Purple-K Powder is Purple - Chemguard; Evaluation of Dry Chemical Fire Extinguishing Standards - NFPA; Potassium bicarbonate - Wikipedia.


by Mozell at May 04, 2025, 02:23 AM

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Brock
19 days ago
But potassium bicarbonate is a potassium compound, so it makes sense that the answer would be D) potassium sulfide.
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Cecilia
20 days ago
I disagree, I believe the answer is B) monoammonium phosphate.
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Melinda
28 days ago
Potassium bicarbonate is definitely more effective than sodium bicarbonate. It's like the Hulk vs. Puny Banner!
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Leslie
1 days ago
I agree, it's like comparing a superhero to a regular guy.
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Moon
19 days ago
Potassium bicarbonate is like the Hulk, definitely more effective than sodium bicarbonate!
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Brock
29 days ago
I think the answer is A) sodium bicarbonate.
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