What type of fire extinguisher requires a 2-A rating?

The correct choice identifies the type of fire extinguisher that requires a 2-A rating, which is specifically associated with portable fire extinguishers. The 2-A rating refers to the extinguishing capability of the unit, particularly when dealing with Class A fires, which involve ordinary combustibles such as wood, paper, and textiles. A 2-A rated portable fire extinguisher can effectively extinguish a fire with a specific amount of water equivalent to 2.5 gallons.

Portable fire extinguishers are specifically designed for ease of use and mobility, making them suitable for immediate response to small fires. They come in various classifications and ratings based on the type of fire they are designed to combat. In contrast, other types such as basic fire extinguishers may not have specific ratings, wheeled fire extinguishers are generally larger and intended for more extensive fire suppression scenarios, and chemical fire extinguishers, while effective against certain fires, are not designated by the 2-A rating. Thus, understanding the classification and capability of portable fire extinguishers is essential for appropriate fire safety measures.