At what point does the PASS alarm begin to activate?

The PASS (Personal Alert Safety System) alarm is designed to alert users when they are in trouble or have become inactive for a certain period while using a Self-Contained Breathing Apparatus (SCBA). The correct answer indicates that the PASS alarm begins to activate at 1/3 of a bottle's available air supply.

This feature is significant for safety in hazardous environments, as it serves as a reminder for the wearer to check their surroundings and ensure they are still operational. If the alarm is activated due to inactivity, it can signal nearby personnel to assist if the user is in need of help.

When the air supply reaches this critical level, it becomes vital for the user to be aware of their remaining air and take appropriate actions, emphasizing the importance of understanding the SCBA's warning systems as part of proper safety protocols in emergency situations. Knowing this threshold can aid in effective decision-making during intense conditions where every breath counts.