USCG Exam PracticeRefrigeration principles and systems
Which of the following correctly identifies the four essential components of the vapor-compression refrigeration cycle in the order the refrigerant flows through them, beginning at the point where heat is absorbed from the refrigerated space?
- ✓ Evaporator → compressor → condenser → metering deviceCorrect
- B. Compressor → condenser → evaporator → metering device
- C. Condenser → metering device → compressor → evaporator
- D. Metering device → compressor → evaporator → condenser
Why A is correct
Low-pressure liquid boils in the evaporator absorbing heat, the compressor draws in the resulting vapor and raises its pressure, the condenser rejects heat and condenses the vapor to liquid, and the metering device throttles the liquid back to low pressure to begin the cycle again. (NAVEDTRA 14075 §6-1)
Cited:NAVEDTRA 14075 §6-1