PE Problem #34

7/18/2018

Which of the following extinguishers would not be suitable for a fire containing oil-based paints, solvents, alcohols, and lacquers?
a. AFFF
b. carbon dioxide
c. potassium chloride
d. wet chemical

Solution | Posted 07/19/18

10 Comments

MRE

7/18/2018 08:48:47 am

Answer = a. AFFF per NFPA Handbook (20th Edition), Section 17-82.

Jimmy

7/18/2018 09:32:13 am

Hmmm, on a practical level, training in the USN says wet chemical was for animal fats and cooking oil, so I would say D without hesitation. AFFF and PKP were all over the ship for fuel fires, and our paint locker had a remote CO2 discharge in case of fire. I will confess I cannot cite a specific reference other than HTCS Brooks, our Damage Control Officer.

Laura

7/18/2018 09:41:52 am

I tend to agree with Jimmy, AFFF used in aircraft hangars and flammable liquid warehouses which contain oil based fuel. Tend to avoid wet chemical since it has potential to damage aircraft and I would think spread pool fire?

John

7/18/2018 09:50:09 am

C potassium chloride is a class D extinguisher (metal)

Fireman112473

7/18/2018 10:10:09 am

I believe you are thinking of Sodium Bicarbonate...... Potassium Bicarbonate (Purple K) is used in Class B fires ( which involves oil-based solvents, alcohol and lacquer)

Fireman112473

7/18/2018 10:02:17 am

D. Wet Chem........(K type extinguishers are used for animal fats and grease fires)

7/18/2018 10:38:07 am

A - AFFF

Pari

7/18/2018 11:04:08 am

A , AFFF is good for Class A fire.

Colleen

7/18/2018 01:50:43 pm

I'm not positive, but my guess is D). wet chemical.

When I looked in the sections related to each of the extinguishing agents, they all sounded like they could be used on flammable liquids, but the section on wet chemical extinguishing agents mostly discussed animal fat/cooking fires, which makes me think it wouldn't be used for the hazards mentioned in this question.

FPE

7/19/2018 04:49:24 am

a. AFFF

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