G2 Gas Fitter Practice Exam

Which of the following are considered the four main classes that fires are divided into?

1. A, B, C, D

2. Type A, Type B, Type C, Type D

3. Class 1, Class 2, Class 3, Class 4

4. Fire Class I, Fire Class II, Fire Class III, Fire Class IV

The correct answer is: Type A, Type B, Type C, Type D

The four main classes that fires are divided into are categorized as Type A, Type B, Type C, and Type D. This classification is essential for understanding how to properly respond to different types of fires based on the materials involved. Type A fires involve ordinary combustibles such as wood, paper, cloth, and some plastics. Type B fires pertain to flammable liquids and gases, like oil and gasoline. Type C fires are related to electrical equipment and appliances, making them distinct because they require different extinguishing methods to ensure safety. Lastly, Type D fires involve combustible metals, a specific category that requires specialized extinguishing agents due to the unique reactions of these metals when they catch fire. The other options provided do not accurately represent the recognized fire classification system used in firefighting and safety management. While some options might seem similar, they reflect different naming conventions or classifications that are not standardized or widely accepted in fire safety protocols. Understanding this classification is crucial for anyone involved in gas fitting and fire safety, as it informs the appropriate fire suppression methods and equipment needed in emergencies.