Question 2904 Deck General
70% to passWhen H2S has been encountered on a MODU, or is anticipated, monitoring devices must sound an alarm (which differs from the lower concentration alarm) or otherwise warn employees when concentration of H2S reaches or exceeds how many parts per million?
A
20
B
50
C
100
D
200
AI Explanation
The correct answer is B) 50 parts per million (ppm). When H2S has been encountered on a MODU (Mobile Offshore Drilling Unit), or is anticipated, monitoring devices must sound an alarm or otherwise warn employees when the concentration of H2S reaches or exceeds 50 ppm. This is in accordance with the OSHA (Occupational Safety and Health Administration) standard for H2S exposure in the oil and gas industry. The other answer choices are incorrect because 20 ppm is the lower concentration alarm threshold, while 100 ppm and 200 ppm are higher than the required 50 ppm warning level specified in the regulation.
Related Questions
Q2540:You are in charge of a towing vessel that operates exclusively on inland waters....
Q3812:Which casualty involving a mobile offshore drilling unit would require a report ...
Q3692:On a MODU, a fire pump may be used for other purposes if _______________.
Q3137:What is required to be posted in the pilothouse of a vessel?
Q1328:You are onboard a tankship during the final stages of loading number two fuel oi...
Ready to test your knowledge?
Take a Deck General Practice Exam
Official Resources
Pass Your Coast Guard Licensing Exams!
Study offline, track your progress, and simulate real exams with the Coast Guard Exams app