Question 1000Deck General70% to pass
In an inert gas system, high pressure alarms are set in the main vapor collection line to cause an audible and visual alarm if the pressure reaches a certain level. What is the percentage of the lowest relief valve setting at which the alarm must sound?
AI Explanation
The correct answer is C) 90%.
According to the regulations for inert gas systems on ships, the high pressure alarm in the main vapor collection line must be set to activate at a pressure corresponding to 90% of the lowest relief valve setting. This ensures that the alarm will sound before the pressure reaches the relief valve setting, allowing the crew to take corrective action and prevent the system from reaching the maximum allowable pressure.
The other options are incorrect because 70% (A) and 80% (B) are below the required 90% threshold, while 95% (D) is above the requirement.
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