Question 157Refrigeration/AC - Assistant Engineer70% to pass
Coast Guard Regulations
AI Explanation
The correct answer is D. The relief valve settings shall be 1 1/4 times the maximum allowable working pressure.
This is correct because the Coast Guard regulations require that the relief valve setting be set at a pressure no higher than 1 1/4 times the maximum allowable working pressure of the refrigeration system. This is to ensure that the system is adequately protected against overpressurization and potential rupture.
The other options are incorrect because: B) specifies a lower rupture disk burst pressure than the regulations allow, C) allows for a rupture disk in series with the relief valve which is not permitted, and A) does not directly address the required relief valve setting.
Related Questions
#155 Coast Guard Regulations #156 With regards to shipboard refrigeration systems, after July 1, 1992, what action became illegal? #158 When opening or closing compressor service and line isolation valves on a typical refrigeration system that is fitted with packed valves, what must you do? #159 What is the purpose of running a refrigeration compressor in short intermittent spurts or throttling the suction isolation valve when starting the system after a prolonged shutdown? #160 When starting a reciprocating refrigeration compressor that has been shut down for a period of time, you should manually throttle which valve?