Oklahoma Locksmith Practice Exam

What characterizes a 'self-closing' door according to NFPA 80?

1. Is normally open but will close by some activation device in case of fire

2. Is always closed and requires an electronic signal to open

3. Can only be closed manually, without any automatic features

4. Is designed to remain open indefinitely in normal operations

The correct answer is: Is normally open but will close by some activation device in case of fire

A 'self-closing' door is characterized as being normally open but will close automatically when activated by a fire detection system or other activation device in case of fire. This functionality is an essential safety feature, ensuring that the door protects the area from smoke and flames during an emergency. By allowing the door to remain open during normal operations, it facilitates easy access and movement, while its ability to shut automatically when needed enhances the overall safety of the environment. Such doors contribute to fire protection systems and help prevent the spread of fire and smoke within different compartments of a building, in compliance with NFPA 80 regulations. The other options describe different door functionalities that do not align with the definition of a self-closing door. For instance, a door that is always closed and requires an electronic signal to open does not allow for normal accessibility, while a door that can only be closed manually lacks the automatic closing feature. Similarly, a door designed to remain open indefinitely contradicts the self-closing function, which is specifically meant for safety during emergencies.