Question

Regular dry chemicals (sodium bicarbonate-based and potassium-based) work on _____ fires.

A. only Class D
B. Class A
C. only Class B
D. Classes B and C

Answer 1

Regular dry chemicals work on Class B and Class C fires.

Step-by-step explanation:

Regular dry chemicals, such as sodium bicarbonate-based and potassium-based extinguishers, work on Class B and Class C fires.

Class B fires involve flammable liquids or gases, such as gasoline or propane. The dry chemical agents smother the fire by creating a barrier that separates the fire's fuel from the oxygen it needs to burn.

Class C fires involve electrical equipment. The dry chemicals are non-conductive and can safely extinguish these fires by interrupting the flow of electricity.