If the valve labeled "D" in the illustration is a suction service valve, what will the port labeled "7" be connected to? GS-RA-08 Illustration GS-RA-08: the U.S. Coast Guard has not released this illustration.
Official USCG Answer & Rule Citation
Correct Answer: Option C — to the line connected to the evaporator outlet
Suction service valves connect the compressor suction port to the evaporator outlet line. Port 7 serves as the gauge connection or bypass port, allowing operators to measure suction pressure, evacuate the compressor, or connect service manifolds during maintenance operations.
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