Answer :
Final answer:
The question relates to the suitability of hand-held portable fire extinguishers weighing more than 40 lbs. for different classes of fires. It's essential to understand that the selection of a fire extinguisher is based on the class of fire it is designed to combat, not its weight. Classes A, B, C, and D fire each require specific extinguishing agents for safe and effective firefighting. So, the correct option is d) Class D fires.
Explanation:
The question "Hand-held portable fire extinguishers weighing more than 40 lbs. are suitable for Class A fires, Class B fires, Class C fires, Class D fires" primarily concerns the application of fire extinguishers based on their weight and the types of fires they are designed to combat. Fire extinguishers are classified by the types of fires they are meant to extinguish, and their weight does not directly determine their suitability for specific fire classes. However, it is essential to choose the correct fire extinguisher for the type of fire to ensure safety and effectiveness.
Class A fires involve ordinary combustibles like wood and paper, Class B fires involve flammable liquids, Class C fires involve electrical equipment, and Class D fires involve combustible metals. Each class of fire requires a specific extinguishing agent to safely and effectively extinguish the fire. The weight of the extinguisher can influence its portability and the duration for which it can discharge, but the selection of an extinguisher should primarily be based on the class of fire it is rated to extinguish.
