USCG Exam PracticeRefrigeration cycle and components
In the vapor-compression refrigeration cycle, what is the primary function of the evaporator?
- A. To compress low-pressure vapor to a high pressure
- B. To condense high-pressure vapor back into a liquid
- ✓ To absorb heat from the refrigerated space by boiling low-pressure liquid refrigerantCorrect
- D. To throttle high-pressure liquid to a lower pressure
Why C is correct
The evaporator is where low-pressure liquid refrigerant boils and absorbs heat (latent heat) from the surrounding space, cooling it. This is the useful work of the refrigeration system. Compression is the compressor's function, condensing is the condenser's, and throttling is the metering device's.