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flammable liquids
B extinguishers are for putting out flammable liquids. These must be carried on boats.
You need to use a Class B extinguisher on flammable liquids.
Burning liquids such as gasoline, kerosene, paint, acetone, and so on.
A type b extinguisher puts out a class B fire, i.e., flammable/combustible liquids and gases.
Liquid
A Class B fire extinguisher. Below is an article about the different types of fire extinguishers.
class b fuels for fire extinguisher training
Foam, dry powder or CO2 gas- a Class B extinguisher
A class C fire extinguisher is used for electrical fires. A all purpose A, B, C extinguisher can also be used.
The type of fire it is designed to extinguish
B-1 is for a Class B fire, that is, flammable/combustible liquids and gases.