Question 94Safety & Environmental - Assistant Engineer
70% to passWhich of the following pressures represents the normal pressure setting of a pressure- vacuum relief valve as normally found on tank vessels?
A22.7 psia - 14.7 psia
B20.7 psia - 14.6 psia
C18.7 psia - 14.4 psia
D16.7 psia - 14.2 psia
AI Explanation
The correct answer is D) 16.7 psia - 14.2 psia. The normal pressure setting of a pressure-vacuum relief valve on tank vessels is typically between 16.7 psia (pounds per square inch absolute) and 14.2 psia. This pressure range is set to maintain the proper internal pressure within the tank and prevent the tank from becoming over- or under-pressurized, which could lead to damage or unsafe conditions. The other answer choices are incorrect because they fall outside the typical pressure range for these types of relief valves on tank vessels. Specifically, options A, B, and C represent either too high or too low of a pressure setting compared to the industry standard.
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