When recovering the remaining R-134a refrigerant from the centrifugal chiller shown in the illustration as a vapor using the recovery unit's compressor, in addition to opening valves "1a", "1b", and the compressor suction and discharge isolation valves, which of the following would be the correct valve lineup? Illustration GS-RA-28 Illustration GS-RA-28: the U.S. Coast Guard has not released this illustration.
Official USCG Answer & Rule Citation
Correct Answer: Option C — valves "3", "4", and "6" open; valves "2", "5", "7", "8", and "10" closed
Under USCG National Maritime Center examination standards, the accepted correct answer is: valves "3", "4", and "6" open; valves "2", "5", "7", "8", and "10" closed.
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