Engine_2014 : Engineering Safety - 1846/2355
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| When hydrogen sulfide has been encountered on a MODU, or is anticipated, monitoring devices must sound an alarm (differing from the lower concentration alarm) or otherwise warn employees when the concentration of the gas reaches or exceeds how many parts per million? |
| A) 20 |
| B) 50 |
| C) 100 |
| D) 200 |
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