<span> B determines the type of fire that can be extinguished, and in this case, it would be flammable liquids such as gasoline, grease, oil, diesel fuel, and kerosene.</span>
The letter "b" indicates it is effective against flammable liquid fires.
Step-by-step explanation:
The letters on fire extinguishers represents the class of fire for which they can be used.
The letter "b" here indicate the b-1 extinguisher is effective against flammable liquid fires. These can be fires where cooking liquid , oil , gasoline , kerosene or paint.
