In the multi-evaporator refrigeration system shown in the illustration, what is the proper name for the valve labeled "29"? Illustration 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
In multi-evaporator systems operating at different temperature zones, individual flow control to the warmer compartment is maintained by the chill box thermostatic expansion valve, which meters liquid refrigerant based on evaporator outlet superheat.
100% Free & Open Access — No daily limits, paywalls, or gated answers on BrightMariner.