Question 92Safety & Environmental - Assistant Engineer
70% to passPressure-vacuum relief valves, as used on tank vessels, are usually set to operate at two points, _______________.
Aany two points below atmospheric pressure
Bany two points above atmospheric pressure
C14.2 psia; 2 psig
D26 inches of vacuum; 5 psig
AI Explanation
The correct answer is C) 14.2 psia; 2 psig. Pressure-vacuum relief valves on tank vessels are typically set to operate at two specific points: 14.2 psia (pounds per square inch absolute) and 2 psig (pounds per square inch gauge). This is in accordance with the U.S. Coast Guard regulations for pressure-vacuum relief valves on tank vessels. The other options are incorrect because: A) pressure-vacuum relief valves are not set to operate below atmospheric pressure, B) they are set to operate above and below atmospheric pressure, and D) the specified settings of 26 inches of vacuum and 5 psig do not match the standard regulatory requirements.
Related Questions
Q@q.QuestionNumber:You notice smoke coming from an open laundry room doorway, which smells like ele... Q@q.QuestionNumber:The airborne concentrations of substances (such as hydrogen sulfide) under which... Q@q.QuestionNumber:In the event of an exhaust duct fire, most dry chemical and carbon dioxide galle... Q@q.QuestionNumber:The best means of combating an oil fire on the surface of the water surrounding ... Q@q.QuestionNumber:A rigid lifesaving device designed for a group of survivors to hold on to while ...
Ready to test your knowledge?
Take a Safety & Environmental - Assistant Engineer Practice ExamOfficial Resources
Want to practice with timed exams?
Download Coast Guard Exams for the full exam experience.
Get the App