A self-closing fire door is one that:

A self-closing fire door is one that:

• A. Closes when heat activates the closing device.
• B. Closes by magnetic controls.
• C. After being opened, returns to the closed position.
• D. Is an exterior door only.

Answer: (C)

A self-closing fire door relies on a door closer that automatically brings the door back to the closed position after it has been opened. This automatic return happens without manual effort, ensuring the fire barrier is restored once the door is released. It isn’t driven by heat, nor is it controlled magnetically, and fire doors aren’t limited to exterior locations. So the defining behavior is: after being opened, it returns to the closed position.

A self-closing fire door relies on a door closer that automatically brings the door back to the closed position after it has been opened. This automatic return happens without manual effort, ensuring the fire barrier is restored once the door is released. It isn’t driven by heat, nor is it controlled magnetically, and fire doors aren’t limited to exterior locations. So the defining behavior is: after being opened, it returns to the closed position.