USCG Exam PracticeAir conditioning, ventilation, and compressed air
In the vapor-compression refrigeration cycle, what is the condition of the refrigerant as it leaves the evaporator and enters the compressor suction?
- A. High-pressure liquid
- B. High-pressure vapor
- C. Low-pressure liquid
- ✓ Low-pressure vapor, slightly superheatedCorrect
Why D is correct
NAVEDTRA 14075 §6-5 states the refrigerant leaves the evaporator as a low-pressure vapor, slightly superheated, on its way to the compressor suction. The system is arranged to ensure full evaporation and slight superheat to protect the compressor from liquid slugging.
Cited:NAVEDTRA 14075 §6-5