đ Key Concepts
⢠SCBA low-air alarm purpose â what it is designed to warn the wearer about
⢠Typical remaining air time / pressure when the alarm activates on firefighting SCBAs
⢠Correct emergency action when you hear the low-air alarm in a hazardous or contaminated space
đ Think About
⢠Think about what the lowâair alarm is trying to tell you: is it warning you about time, pressure, action, or a combination?
⢠Ask yourself: when the alarm sounds, is it already too late to stay and work, or is it the signal to begin leaving with some reserve left?
⢠Consider how SCBAs are usually described in training: do they specify a particular remaining pressure, a time estimate, an action to take, or all of these at once?
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Before You Answer
⢠Check whether SCBA lowâair alarms are generally set to a specific remaining pressure level (for example, a certain psi or fraction of cylinder pressure).
⢠Consider whether training materials say you must immediately exit the hazardous area when the lowâair alarm sounds, or whether you may continue working briefly.
⢠Verify if exam questions about SCBA alarms often combine pressure, time remaining, and required action, or focus on only one of these.