The rupture disc on a low-pressure centrifugal refrigeration unit is used as an overpressure protection device and is set to relieve at 15 psig and is most likely to lift when the compressor is idle. Where is the rupture disc located?
Official USCG Answer & Rule Citation
Correct Answer: Option D — on top of chiller evaporator shell
Rupture discs on low-pressure centrifugal units are installed on top of the chiller evaporator shell to safely vent refrigerant vapor during abnormal overpressure events.
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