USCG Exam PracticeRefrigeration cycle and components
What is the purpose of the filter-drier installed in the liquid line of a refrigeration system?
- A. To subcool the liquid refrigerant before it reaches the compressor
- B. To separate oil from refrigerant vapor on the suction side
- ✓ To remove moisture and particles from the liquid refrigerantCorrect
- D. To regulate the flow of refrigerant into the evaporator
Why C is correct
The filter-drier is fitted in the liquid line between the receiver and the metering device to remove moisture and particulate contamination. Moisture in the system can freeze at the metering orifice and react with oil and refrigerant to form acids and sludge.