In the same procedure, which word completes the phrase 'by ______ as much of the first refrigerant as possible'?

• A. Purge
• B. Recovering
• C. Evacuate
• D. Filter

Answer: (B)

The action described is the method used to handle refrigerant during service, focusing on capturing rather than releasing it. After by, a gerund form is used to indicate the ongoing action of how you perform the step. Recovering fits naturally here because it means taking refrigerant out of the system and returning it to a recovery or recycling process, so as much of the first refrigerant as possible is retained.

Purge would imply venting or flushing out refrigerant, which is not about collecting it for reuse. Evacuate describes pulling a vacuum to remove air or noncondensables, not specifically capturing the refrigerant itself. Filter suggests removing impurities, not reclaiming the refrigerant. While purging and evacuating are real actions in refrigerant work, they don’t express the same goal as recovering in this context, and the phrasing with recovering is the standard way to describe maximizing the amount of refrigerant saved.