SkillCat EPA Universal Practice Test

System-dependent recovery uses the appliance’s own compressor to move refrigerant into the recovery cylinder, so the recovery process relies on the unit being recovered rather than a separate recovery machine. This is considered a passive approach because no dedicated recovery unit’s compressor is used. It’s appropriate for appliances with a small refrigerant charge, typically under 15 pounds, where the system’s own compressor can handle the recovery without a separate machine. For larger systems or when the appliance’s compressor can’t be used, a self-contained recovery unit with its own compressor is required. So the description that it’s passive, uses the system’s compressor, and is suitable for under 15 pounds matches the concept of system-dependent recovery.