The low alarm of the self-contained breathing apparatus will sound when_____ of the cylinder's air supply is remaining.

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Multiple Choice

The low alarm of the self-contained breathing apparatus will sound when_____ of the cylinder's air supply is remaining.

The low-air alarm is designed to trigger when the firefighter has about one-third of the cylinder’s air remaining. This gives enough time to safely exit and complete a bailout or switch to another air source. In this scenario, a full cylinder contains about 2400 liters, so 33% of that is roughly 792 liters. That’s why the correct threshold is 33% or 792 liters—the alarm is meant to sound with enough remaining air to safely retreat. The other values do not match this standard threshold with the given cylinder capacity.

The low-air alarm is designed to trigger when the firefighter has about one-third of the cylinder’s air remaining. This gives enough time to safely exit and complete a bailout or switch to another air source. In this scenario, a full cylinder contains about 2400 liters, so 33% of that is roughly 792 liters. That’s why the correct threshold is 33% or 792 liters—the alarm is meant to sound with enough remaining air to safely retreat. The other values do not match this standard threshold with the given cylinder capacity.

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