When recovering R-12 from a small appliance with a working compressor, using a recovery device manufactured after November 15, 1993, what percentage of the remaining charge must be removed from the system?

Correct Answer: Option C — 90%

EPA standards mandate that recovery equipment manufactured after November 15, 1993, used on small appliances with a working compressor must evacuate and remove at least 90 percent of the existing refrigerant charge.