Which extinguishing agent is described as multipurpose and suitable for multiple fire types?

• A. ABC Dry Chemical
• B. Water
• C. CO2
• D. AFFF

Answer: (A)

A multipurpose extinguisher is designed to handle more than one type of fire. The ABC dry chemical extinguisher is the best example because it covers three common fire classes: ordinary combustibles (like paper and wood), flammable liquids (like gasoline), and energized electrical fires. It does this with a fine dry chemical powder that interferes with the chemical reactions happening in the flame, effectively stopping the burning process at its source. The powder also blankets the fuel surface and helps prevent reignition by cutting off heat and releasing vapors.

On electrical fires, this type of extinguisher is safe to use when power can’t be shut off, because the powder is non-conductive and creates an insulating layer. That combination—ability to tackle A, B, and C fires with a single agent—explains why ABC dry chemical is described as multipurpose.

Other extinguishing agents are more limited: water treats only ordinary combustibles; CO2 is good for small, contained or electrical fires but not ideal for burning liquids or large fires; AFFF is designed mainly for flammable liquids (and some blended uses) rather than all three classes.