Question 25 of 30
What should you do when the alarm bell on a self-contained breathing apparatus sounds?
A
Immediately evacuate the contaminated area.
B
Open the bypass valve on the regulator and immediately evacuate the contaminated area.
C
Move the tank selector lever to the full tank position and reset the alarm so you can evacuate the area when it sounds again.
D
Move the reserve lever to the 'reserve' position on the regulator and reset the alarm so you can evacuate the area when it sounds again.
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Answer & Explanation
The correct answer is Option A: Immediately evacuate the contaminated area..
The alarm on a self-contained breathing apparatus (SCBA) signifies the low-pressure warning, indicating the air reserve is nearing depletion. The only safe action is to immediately retreat to a safe, non-contaminated environment.