New York State Master Electrician Practice Exam 2026 - Free Electrician Practice Questions and Study Guide

The primary function of audible and visual signal devices in an emergency system is to notify occupants of a fire. These devices are designed to provide immediate alerts to individuals in a building during emergencies, particularly in the event of fire or other hazardous situations. The sound of alarms and the flashing of lights serve to effectively grab the attention of occupants, prompting them to evacuate the premises swiftly and safely.

In an emergency context, signaling devices must be highly visible and audible to ensure all individuals in the vicinity recognize the urgency of the situation. This is crucial, as the rapid dissemination of information can significantly reduce panic and chaos, guiding occupants towards safe exits.

While other options mention important functions such as indicating battery load, alerting to security breaches, or controlling access, these do not align with the core purpose of emergency signaling devices, which is to ensure occupant safety through clear notifications during times of crisis.