Which class of fire is involved when a coffee pot hot plate is left unattended and ignites papers which fall from a bulletin board?

The scenario described involves a coffee pot hot plate igniting papers that have fallen from a bulletin board. This situation is associated with Class A fires, which include ordinary combustible materials such as wood, paper, cloth, and some plastics.

In this case, the ignition of papers represents the burning of a common combustible item, which is the hallmark of a Class A fire. The fires in this class can typically be extinguished with water or other methods that disrupt the combustion process for those types of materials.

Class B fires, on the other hand, involve flammable liquids and gases, while Class C fires pertain to electrical equipment fires. Class D fires involve combustible metals, which do not apply in this case. Therefore, the materials involved clearly categorize this incident as a Class A fire.