List four classes of fire extinguishers. For each class, describe its designating symbol and identify the type or types of fire it is designed to extinguish.

There are four main classes of fire extinguishers: Class A for ordinary combustibles, Class B for flammable liquids, Class C for electrical fires, and Class D for combustible metals. Each type has a distinct symbol for easy identification. Understanding these classes helps ensure appropriate fire-fighting measures are taken based on the materials involved.

Explanation:

Classes of Fire Extinguishers

Fire extinguishers are divided into several classes, each designed to combat specific types of fires. Below are four classes of fire extinguishers along with their symbols and the types of fires they are meant to extinguish:

Class A: This extinguisher is represented by a triangle symbol containing a flame. It is used for fires involving ordinary combustibles such as wood, paper, and cloth.
Class B: The symbol for this class is a square with a flame and typically a black background. Class B extinguishers are designed to put out fires involving flammable liquids, such as oil, gasoline, and solvents.
Class C: This class is denoted by a circle symbol with a flame inside and a blue background. Class C extinguishers are suitable for fires involving electrical equipment like appliances, wiring, and circuit breakers.
Class D: This extinguisher has a star symbol and is used for fires that involve combustible metals, such as magnesium, titanium, and sodium. It often employs dry powder agents to put out the flames.

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