What does the green triangle symbol represent in fire extinguishers?

The green triangle symbol on fire extinguishers indicates that it is suitable for use on Class A fires, which typically involve ordinary combustible materials such as wood, paper, cloth, trash, and some plastics. Class A fires are the most common types of fires, hence the designated symbol helps users quickly identify the appropriate extinguisher for those situations.

Fire extinguishers are categorized based on the types of fires they are designed to combat. The classification system helps both professionals and the general public understand which extinguisher to use in a fire emergency. In the case of Class A fires, using the correct extinguisher—marked by the green triangle—ensures effective fire suppression and enhances safety, as using the wrong type could exacerbate the situation or be ineffective.

The other choices pertain to different classes of fire, each marked by different symbols:

• Class B fires involve flammable liquids and gases and are marked with a red square.

• Class C fires involve electrical equipment, denoted by a blue circle.

• Class D fires involve combustible metals and are represented by a yellow star.

Understanding these symbols is crucial for anyone involved in fire safety or inspection practices.