Which of the following is NOT a part that firefighters may need to remove to access deep-seated, concealed fires?

Circuit boards are not typically a part that firefighters would need to remove in order to access deep-seated, concealed fires. Access to such fires often requires removing structural elements that obstruct fire location and suppression.

Carpeting, ceiling covers, and wall panels are more commonly encountered in fire scenarios. These materials can conceal burning materials underneath or behind them, making them critical areas for firefighters to check for hidden fires. Removing carpets can expose smoldering materials on the floor, while ceiling covers and wall panels may hide fire in attics or walls—areas that could be damaging if not addressed.

In contrast, circuit boards are components found in electronic devices and machinery. While they may be involved in some fire situations, they do not serve as barriers that would need removal to access deep-seated fires in more general structural firefighting contexts. Hence, focusing on the more relevant aspects of fire suppression, firefighters do not prioritize circuit boards when addressing concealed fires.