A trick question I learned long ago, when it was used on me, is one I use today when auditing a facility that has SCBAs for “Emergency Use Only” (e.g., an ERT). As we are walking to the ERT cage/trucks, I casually ask if the facility fills its bottles/cylinders or if they have a breathing air compressor and fill their own bottles/cylinders. Many of my clients use their Local FD to fill their bottles/cylinders, and this leads me to my “trick question”…
How often do you have to “top off” your bottles/cylinders?