In the illustrated refrigeration system, what is the proper name for the component labeled "A"? Illustration GS-RA-12 Illustration GS-RA-12: the U.S. Coast Guard has not released this illustration.

Correct Answer: Option B — compressor

Component A in typical marine vapor-compression refrigeration illustrations represents the refrigerant compressor. It mechanically draws low-pressure, superheated vapor from the evaporator and compresses it to a high-pressure, high-temperature gas, driving the entire thermodynamic refrigeration cycle.