If the valve labeled "D" in the illustration is a suction service valve, what will the port labeled "7" be connected to? Illustration 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 B — to the line connected to the evaporator outlet
Marine compressor service valves connect service ports such as port 7 directly to the evaporator outlet line upstream of the valve body, allowing technicians to accurately monitor running suction pressure and perform essential gauge readings.
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