Loss of refrigerant during the process of purging of air and non-condensable gases can be kept to a minimum by what action?

Correct Answer: Option C — cracking the purge valve briefly and allowing the refrigerant to re-settle between purges

Cracking the purge valve briefly allows vapor-air mixtures to bleed off while permitting entrained refrigerant vapor to condense and settle back into the liquid phase, minimizing the wasteful loss of working refrigerant during purging operations.