What signal is produced when a pull station is actuated?

When a pull station is actuated, the signal produced is an alarm. This function is designed to notify occupants and emergency services of a potential emergency, such as a fire. The primary purpose of a pull station is to provide a manual means of activating an alarm system, which serves as a crucial alerting mechanism in emergencies.

When the pull station is engaged, it typically activates signal devices such as horns or strobes, indicating to all building occupants that they need to take immediate action, such as evacuating the premises. The alarm signal is a critical element in fire safety protocols, ensuring rapid response and coordination with emergency services.

The other options mentioned, such as trouble, warning, and test, do not accurately reflect the primary function of a pull station. Instead, they refer to different signaling conditions related to monitoring or diagnostic states of fire alarm systems. Hence, the alarm signal is the correct and most relevant output associated with the actuation of a pull station.