Question 328General Subjects - 1st Asst/Chief

The correct answer is D) The refrigeration system should be pumped down so that the entire refrigerant charge is stored and isolated in the receiver tank. This is the correct answer because when a refrigeration system is to be laid up for an extended period with minimal utilities, the best practice is to isolate the refrigerant charge in the receiver tank. This prevents the refrigerant from leaking or venting to the atmosphere, which would be environmentally harmful and illegal. Leaving the system in an idle condition or evacuating the refrigerant charge entirely are not recommended, as they can lead to contamination or loss of the refrigerant. The other options are incorrect because: A) Venting the refrigerant to the atmosphere is not allowed, and B) Transferring the charge to a recovery cylinder is unnecessary if the system can be properly pumped down. C) Leaving the system in an idle condition risks refrigerant leaks and contamination.