How is the role of a first responder at the operations level best described?
- Offensive: approach the point of release to plug, patch or stop the leak
- Defensive: contain the release from a safe distance and limit its spread
- Advisory: provide specialist knowledge of the substance to the commander
- Passive: recognize the release and notify the authorities, then leave
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B. Defensive: contain the release from a safe distance and limit its spread
Operations-level responders act defensively to protect people, property and the environment without trying to stop the release at its source. Approaching the point of release to stop it is the technician's offensive role.
Reference: 29 CFR 1910.120(q)(6)(ii)
Below what oxygen concentration does OSHA consider an atmosphere oxygen deficient?
- 20.9%
- 18.0%
- 16.0%
- 19.5%
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D. 19.5%
An atmosphere with less than 19.5 percent oxygen by volume is oxygen deficient. Normal air is 20.9 percent, so that figure is the starting point, not the limit.
Reference: 29 CFR 1910.134(b); 29 CFR 1910.146(b)
What respiratory protection is part of a Level B ensemble?
- Full-facepiece air-purifying respirator with combination cartridges fitted
- Powered air-purifying respirator with a loose-fitting hood and HEPA filter
- Positive-pressure SCBA, or a positive-pressure airline unit with escape SCBA
- Half-mask air-purifying respirator, with an escape bottle carried on the belt
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C. Positive-pressure SCBA, or a positive-pressure airline unit with escape SCBA
Level B uses supplied breathing air, the same respiratory protection as Level A. Air-purifying respirators of any kind belong to Level C, which is what the wrong choices describe.
Reference: 29 CFR 1910.120 Appendix B