What types of materials is a Class A fire extinguisher used for?

A Class A fire extinguisher is specifically designed to combat fires that involve ordinary combustible materials. This type of extinguisher is effective against fires fueled by common items like wood, cloth, paper, rubber, and many plastics, where the burning material typically produces ash.

The reason this answer is correct lies in the classification system for fire extinguishers. Class A extinguishers work by cooling the materials and extinguishing the flames, which is particularly effective for the types of materials mentioned. Understanding the specific nature of the materials that each class of fire extinguisher can address is critical for fire safety and response protocols.

Other types of materials mentioned in the options are not suitable for Class A extinguishers; flammable liquids and gases would typically require a Class B extinguisher, while cooking oils and equipment often need a Class K extinguisher designed for kitchen fires. Similarly, combustive metals like magnesium and titanium necessitate specialized extinguishing agents found in Class D extinguishers.