What is the correct sequence to don an SCBA to ensure a proper seal?

What is the correct sequence to don an SCBA to ensure a proper seal?

• A. Don the facepiece first, then the harness, adjust straps.
• B. Don the harness, adjust straps, then facepiece, perform seal checks after entry.
• C. Don the facepiece, perform seal checks, then harness.
• D. Don the harness, don the facepiece, adjust straps for a snug seal, and perform seal checks before entering.

Answer: (D)

Securing the harness first sets up the SCBA so the weight is carried by the harness and the frame is properly positioned before the facepiece goes on. Put the facepiece on next and seat it correctly on the face. Then adjust the facepiece straps for a snug, even seal around the face to prevent leaks as you move. Finally, perform seal checks to verify there are no leaks before entering the hazardous area. Doing the seal check after entry or skipping it risks allowing a leak to go unnoticed while you’re in The environment. This sequence ensures the harness supports the unit, the facepiece fits tightly, and the seal is confirmed before exposure.

Securing the harness first sets up the SCBA so the weight is carried by the harness and the frame is properly positioned before the facepiece goes on. Put the facepiece on next and seat it correctly on the face. Then adjust the facepiece straps for a snug, even seal around the face to prevent leaks as you move. Finally, perform seal checks to verify there are no leaks before entering the hazardous area. Doing the seal check after entry or skipping it risks allowing a leak to go unnoticed while you’re in The environment. This sequence ensures the harness supports the unit, the facepiece fits tightly, and the seal is confirmed before exposure.