NFPA standards require a low-air alarm to activate on SCBA when a certain percentage of air is left. Which percentage?

The correct answer is the percentage at which the low-air alarm is required to activate on Self-Contained Breathing Apparatus (SCBA). According to the National Fire Protection Association (NFPA) standards, the low-air alarm is mandated to activate at 35% of the air supply remaining. This is significant because it serves as a crucial safety feature that alerts firefighters to the need to exit an area or find a safe location to re-evaluate their air supply status. By having the alarm activate at this percentage, it provides enough time for personnel to assess their situation and take appropriate action, which is particularly important in hazardous environments where air quality may be compromised. Understanding this standard enhances safety and operational effectiveness during firefighting activities.