Which class of fire extinguisher is appropriate for use on flammable liquids?

The appropriate class of fire extinguisher for use on flammable liquids is Class B. This class is specifically designed to tackle fires involving combustible liquids such as gasoline, oil, paint, and solvents. Class B extinguishers work by smothering the flames and creating a barrier between the oxygen and the burning liquid, effectively extinguishing the fire.

Class A extinguishers are intended for ordinary combustibles like wood, paper, and cloth, while Class C extinguishers are meant for electrical fires, and Class D extinguishers are designed for combustible metals. Each class has its specified use case, so while all are crucial for safety, only Class B is appropriate for flammable liquids. This distinction is vital for ensuring the right type of extinguisher is used in emergency situations, preventing the fire from worsening or causing additional hazards.