Carbon Dioxide Extinguishing Agent is associated with which classes?

Carbon Dioxide Extinguishing Agent is associated with which classes?

• A. Class A
• B. Class B
• C. Class B and C
• D. Class A and B

Answer: (C)

Carbon dioxide extinguishing agents are chosen for fires where you want to deprive the flame of oxygen and avoid leaving residue. CO2 displaces the air around the fire, which quickly smothers vapors from flammable liquids (Class B) and is also safe to use on electrical equipment because CO2 is non-conductive and leaves no conductive residue. It isn’t ideal for ordinary combustibles (Class A) because the fuel can burn on hidden surfaces and re-ignite once the gas dissipates, and it’s not suited for metal fires (Class D). Also, CO2 should be used with caution in occupied spaces due to the risk of asphyxiation. So the best fit is fires involving flammable liquids and energized electrical equipment—Class B and Class C.

Carbon dioxide extinguishing agents are chosen for fires where you want to deprive the flame of oxygen and avoid leaving residue. CO2 displaces the air around the fire, which quickly smothers vapors from flammable liquids (Class B) and is also safe to use on electrical equipment because CO2 is non-conductive and leaves no conductive residue. It isn’t ideal for ordinary combustibles (Class A) because the fuel can burn on hidden surfaces and re-ignite once the gas dissipates, and it’s not suited for metal fires (Class D). Also, CO2 should be used with caution in occupied spaces due to the risk of asphyxiation. So the best fit is fires involving flammable liquids and energized electrical equipment—Class B and Class C.