During the morning daily SCBA checkout, the remote gauge must read within what percentage of the cylinder gauge?

• A. Ensure cylinder is full
• B. Check batteries in facepiece and PASS
• C. Ensure facepiece is clean and free of cracks
• D. Ensure remote gauge reads within 10% of cylinder gauge

Answer: (D)

The main concept is that the remote gauge must closely match the cylinder gauge to ensure you have an accurate view of the air supply. During the morning SCBA checkout, the remote reading should be within a small tolerance of the cylinder gauge—specifically within 10%. This allowance accounts for minor calibration differences and measurement limits, so a remote readout that tracks the cylinder pressure within about ten percent gives you confidence the remote gauge is functioning properly.

If the remote gauge reads noticeably different from the cylinder gauge, it can indicate a problem with the remote gauge, its hose, or calibration, and the unit should be investigated or serviced before use. Other checks—like confirming the cylinder is full, inspecting batteries in the facepiece and PASS, or ensuring the facepiece is clean and free of cracks—are important safety steps, but they address different aspects of the SCBA and do not test the relationship between the remote and cylinder gauges.