Water and Class A fire extinguishers should never be used on a Class B fire, because it can splatter the burning oil or gasoline, spreading the fire to a larger area instead of extinguishing it.

Question

Quizplus · Accepted Answer

Water and Class A fire extinguishers are not suitable for Class B fires because they can cause the fuel to spread, leading to a bigger fire. Class B fires involve flammable liquids and gases such as gasoline, oil, propane, etc. Class B fires require a specific type of fire extinguisher designed to smother the fuel and extinguish the fire. Water can spread a Class B fire, which is fueled by flammable liquids such as oil, gasoline, or certain chemicals. It is important to use the correct type of fire extinguisher for each class of fire to minimize the risk of spreading the fire. Class B fires require foam, CO2, or dry chemical extinguishers.

Water and Class a Fire Extinguishers Should Never Be Used