If a refrigeration compressor crankcase is...

If a refrigeration compressor crankcase is...

Question 1 of 270705eccef9ebacbc34ba4d46184

If a refrigeration compressor crankcase is sweating or frosting and this is accompanied by unsusual noises coming from the compressor, what is most likely the cause?

Question 1 of 27070

Q

If a refrigeration compressor crankcase is sweating or frosting and this is accompanied by unsusual noises coming from the compressor, what is most likely the cause?

🔍 Key Concepts

• Behavior of a refrigeration compressor when liquid refrigerant returns to it (liquid slugging) • What happens to the crankcase temperature and appearance when liquid refrigerant or excess refrigerant reaches it • How an expansion valve that is not regulating properly affects evaporator and compressor conditions

💭 Think About

• Which choice would allow too much refrigerant (possibly in liquid form) to leave the evaporator and reach the compressor crankcase? • What condition around the compressor crankcase would cause sweating or frosting – higher heat or very low temperatures? • Which options describe relatively mild or normal conditions, and which describe a fault serious enough to cause unusual noises in the compressor?

✅ Before You Answer

• Compare which option could lead to liquid refrigerant entering the compressor, causing noise and crankcase frosting • Decide whether excessive superheat would make the compressor colder or hotter at the crankcase • Ask yourself if normal oil circulation or a small amount of air in the system would usually cause loud, unusual noises and visible frosting at the compressor