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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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Sabra
4 days ago
Potassium bicarbonate, the baking soda on steroids. This question is a real blast from the past!
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Idella
5 days ago
Potassium sulfide? That sounds like something you'd find in a toxic waste dump. I'll take the safe bet on B.
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Clorinda
8 days ago
Monoammonium phosphate? What is this, a chemistry lab? I'm sticking with the classic potassium bicarbonate.
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Rupert
12 days ago
I'm pretty sure it's not sodium chloride. That's just plain old table salt. Gotta go with A on this one.
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Laurene
3 days ago
A) sodium bicarbonate is the correct answer.
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Willard
4 days ago
Yeah, sodium chloride is just table salt. Sodium bicarbonate is definitely more effective.
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Valda
6 days ago
I agree, sodium bicarbonate is the way to go.
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Cecilia
15 days ago
That's a good point, I didn't consider that. I think you might be right.
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Brock
1 months 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
1 months ago
I disagree, I believe the answer is B) monoammonium phosphate.
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Melinda
1 months ago
Potassium bicarbonate is definitely more effective than sodium bicarbonate. It's like the Hulk vs. Puny Banner!
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Micaela
5 days ago
Yeah, potassium bicarbonate is the real deal when it comes to fire extinguishing agents.
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Leslie
17 days ago
I agree, it's like comparing a superhero to a regular guy.
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Moon
1 months ago
Potassium bicarbonate is like the Hulk, definitely more effective than sodium bicarbonate!
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Brock
1 months ago
I think the answer is A) sodium bicarbonate.
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