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What is the maximum duration for which audible devices must operate according to ESA standards?

  1. 15 minutes

  2. 30 minutes

  3. 60 minutes

  4. 45 minutes

The correct answer is: 30 minutes

The maximum duration for which audible devices must operate according to ESA standards is 30 minutes. This requirement is set to ensure that audible alarms provide a sufficient warning period to alert occupants and response personnel while also minimizing nuisance alarms that could lead to desensitization to alarms. A 30-minute duration strikes a balance between effective alerting and the need to avoid unnecessary disturbance in environments where false alarms might occur. This standard is important for maintaining the integrity and reliability of alarm systems within the framework of safety regulations.