Engine Refrigeration (Supplementary) USCG Question #119 (Set 3)

In the multi-evaporator refrigeration system shown in the illustration, what is the proper name for the valve labeled "29"? GS-RA-12 Illustration GS-RA-12: the U.S. Coast Guard has not released this illustration.

Official USCG Answer & Rule Citation

Correct Answer: Option C — chill box thermostatic expansion valve

Component "29" in standard multi-evaporator marine refrigeration diagrams is the chill box thermostatic expansion valve, responsible for metering liquid refrigerant into the chill box evaporator coil based on superheat.

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