USCG Exam PracticeAir conditioning, ventilation, and compressed air
In the vapor-compression refrigeration cycle, which component throttles high-pressure liquid refrigerant to low pressure, allowing it to boil at a low temperature in the evaporator?
- A. Compressor
- B. Condenser
- ✓ Metering (expansion) deviceCorrect
- D. Receiver
Why C is correct
Per NAVEDTRA 14075 §6-1, the metering device throttles high-pressure liquid to low pressure; this sudden pressure drop chills the refrigerant and allows it to boil at low temperature as it re-enters the evaporator.
Cited:NAVEDTRA 14075 §6-1