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NFPA CFPS Exam - Topic 6 Question 10 Discussion

Potassium bicarbonate is a dry chemical agent considered to be twice as effective as
A) sodium bicarbonate.
B) monoammonium phosphate.
C) sodium chloride.
D) potassium sulfide.

NFPA CFPS Exam - 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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Bo
7 months ago
Really? Twice as effective? That sounds a bit exaggerated.
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Doug
7 months ago
Definitely A, sodium bicarbonate can't compete.
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Diane
7 months ago
Wow, I didn't know potassium bicarbonate was that powerful!
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Lynelle
7 months ago
I thought monoammonium phosphate was better?
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Derick
7 months ago
Potassium bicarbonate is indeed more effective than sodium bicarbonate!
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Marica
8 months ago
I vaguely remember that potassium bicarbonate is used in some fire extinguishers, but I can't remember the exact comparison with the other options listed.
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Scarlet
8 months ago
I feel like sodium bicarbonate is the most common one we discussed, but I can't recall if potassium bicarbonate is really better.
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Hillary
8 months ago
I remember practicing a question about fire extinguishing agents, and I think monoammonium phosphate was mentioned as a good alternative.
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Ashlyn
8 months ago
I think potassium bicarbonate is often compared to sodium bicarbonate, but I'm not entirely sure if it's actually twice as effective.
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Twana
9 months ago
I'm pretty confident I can solve this. I just need to recall what I know about the effectiveness of these chemical agents and make a logical comparison.
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Rasheeda
9 months ago
Wait, what's the difference between sodium bicarbonate and monoammonium phosphate? I'm a little confused on the specifics here.
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Brittni
9 months ago
Okay, I've got this. Potassium bicarbonate is a dry chemical agent, so that's a good start. Now I just need to figure out how it compares to the other options.
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Gary
9 months ago
Hmm, I'm not too familiar with these specific chemicals. I'll have to think through the properties and uses of each one to determine which is most effective.
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Beth
9 months ago
This seems like a straightforward chemistry question. I'll need to compare the effectiveness of the different chemical agents mentioned.
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Sabra
1 year ago
Potassium bicarbonate, the baking soda on steroids. This question is a real blast from the past!
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Idella
1 year 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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Matthew
11 months ago
I think I'll go with A, sodium bicarbonate, just to be safe.
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Giuseppe
12 months ago
I've heard that potassium bicarbonate is more effective than sodium chloride.
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Mendy
1 year ago
I'm not sure, but I think sodium bicarbonate is the correct answer.
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Emiko
1 year ago
I agree, potassium sulfide does sound dangerous. I think B is the safer option.
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Clorinda
1 year ago
Monoammonium phosphate? What is this, a chemistry lab? I'm sticking with the classic potassium bicarbonate.
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Rupert
1 year 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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Danica
1 year ago
Potassium bicarbonate is definitely more effective than sodium bicarbonate.
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Ozell
1 year ago
I agree, sodium chloride is just table salt.
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Laurene
1 year ago
A) sodium bicarbonate is the correct answer.
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Willard
1 year ago
Yeah, sodium chloride is just table salt. Sodium bicarbonate is definitely more effective.
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Valda
1 year ago
I agree, sodium bicarbonate is the way to go.
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Cecilia
1 year ago
That's a good point, I didn't consider that. I think you might be right.
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Brock
1 year 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 year ago
I disagree, I believe the answer is B) monoammonium phosphate.
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Melinda
1 year ago
Potassium bicarbonate is definitely more effective than sodium bicarbonate. It's like the Hulk vs. Puny Banner!
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Micaela
1 year ago
Yeah, potassium bicarbonate is the real deal when it comes to fire extinguishing agents.
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Leslie
1 year ago
I agree, it's like comparing a superhero to a regular guy.
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Moon
1 year ago
Potassium bicarbonate is like the Hulk, definitely more effective than sodium bicarbonate!
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Brock
1 year ago
I think the answer is A) sodium bicarbonate.
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