SCIENCE
ENVIRONMENTAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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50 parts per million
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500 parts per billion
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500 parts per million
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None of the above
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Detailed explanation-1: -OSHA Carbon Monoxide Exposure Limits The OSHA personal exposure limit (PEL) for CO is 50 parts per million (ppm). OSHA standards prohibit worker exposure to more than 50 parts of CO gas per million parts of air averaged during an 8-hour time period. The 8-hour PEL for CO in maritime operations is also 50 ppm.
Detailed explanation-2: -Occurrence in air Global background concentrations of carbon monoxide range between 0.06 and 0.14 mg/m3 (0.05– 0.12 ppm).
Detailed explanation-3: -Exposure Limits [OSHA PEL] The current Occupational Safety and Health Administration (OSHA) permissible exposure limit (PEL) for carbon monoxide is 50 parts per million (ppm) parts of air (55 milligrams per cubic meter (mg/m(3))) as an 8-hour time-weighted average (TWA) concentration [29 CFR Table Z-1].
Detailed explanation-4: -200 ppm: Mild headache after 2-3 hours of exposure. 400 ppm: Headache and nausea after 1-2 hours of exposure. 800 ppm: Headache, nausea, and dizziness after 45 minutes; collapse and unconsciousness after 1 hour of exposure. 1, 000 ppm: Loss of consciousness after 1 hour of exposure.