Which type of event would typically trigger a fire alarm system?

A fire alarm system is designed to respond to specific emergency situations that indicate the presence of fire or conditions that could lead to a fire. Smoke or heat detection is a critical function of these systems, as they are equipped with sensors that detect the presence of smoke and the rise in temperature associated with a fire. When these sensors are activated, they signal the alarm system to alert occupants and initiate necessary safety protocols, such as notifying emergency services.

In contrast, routine maintenance, battery tests, and conducting drills do not typically represent the presence of an immediate threat such as fire, and therefore would not trigger the alarm system. Routine maintenance ensures that the fire alarm system is functioning properly, while battery tests are performed to confirm that the backup power supplies are in good working condition. Conducting drills is a proactive safety measure that prepares occupants for an emergency but does not indicate an actual fire situation. Thus, the correct event that would trigger a fire alarm system is indeed the detection of smoke or heat.