Answer :
Final answer:
Rescuers should not remove their self-contained breathing apparatus (SCBA) during a secondary search until the supervisor or safety officer declares the atmosphere safe. Visible flames and smoke are not the only hazard; invisible threats like harmful gases or particles can also occur, hence, precautions like SCBA are necessary.
Explanation:
In hazardous situations like a fire or other serious hazards, it's crucial for rescuers to take every precaution to ensure their safety. Although the presence of visible flames or a cleared room of smoke might suggest lower risk, these cues are not the decisive factors for removing a self-contained breathing apparatus (SCBA).
During a secondary search, rescuers should not remove SCBA until the supervisor or safety officer determines that the atmosphere is safe, even in the absence of visible flames or remaining victims. It is important to remember that even if a room appears clear, conditions can rapidly change or hidden hazards may still exist such as harmful gases or particles suspended in the air.
A good analogy is the use of a protective suit in BSL-4 laboratories, as seen in Figure 13.2. This suit, like the SCBA, proves crucial in maintaining the safety of the individual amidst uncertain and potentially extreme physical danger.
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