What is the typical function of the SCBA low-air alarm?

What is the typical function of the SCBA low-air alarm?

• A. It alerts the wearer that remaining air is low and signals the need to retreat to fresh air or exit the hazard area.
• B. It increases airflow automatically.
• C. It records a timer for entry duration.
• D. It glows to indicate system readiness.

Answer: (A)

The low-air alarm is a warning system that tells the wearer their air supply is getting short. When the cylinder pressure drops to a defined point, the alarm activates—usually audible—and signals that it’s time to retreat to fresh air or exit the hazard area. This immediate cue helps the wearer avoid running out of air in a dangerous environment by prompting a safe withdrawal while there’s still breathable air available. It’s not designed to auto-increase airflow, record entry time, or indicate system readiness with a glow.

The low-air alarm is a warning system that tells the wearer their air supply is getting short. When the cylinder pressure drops to a defined point, the alarm activates—usually audible—and signals that it’s time to retreat to fresh air or exit the hazard area. This immediate cue helps the wearer avoid running out of air in a dangerous environment by prompting a safe withdrawal while there’s still breathable air available. It’s not designed to auto-increase airflow, record entry time, or indicate system readiness with a glow.