Question 109Refrigeration & AC - QMED

A) liquid refrigerant returning to the compressor is the most likely cause if the refrigeration compressor crankcase is sweating or frosting and is operating with an unusual noise. The reasoning is that when liquid refrigerant returns to the compressor, it can cause the crankcase to sweat or frost due to the rapid expansion and cooling. Additionally, the unusual noise from the compressor is likely caused by the liquid refrigerant interfering with the normal compression process. The other options are less likely causes. B) a shortage of refrigerant would not necessarily cause sweating or frosting. C) the compressor running continuously could lead to issues, but does not directly explain the specific symptoms. D) the compressor short-cycling on the high-pressure cutout is not the primary issue here.