Exam topic · Type sections
Recovery techniques
Getting refrigerant out of a system before opening it, and how thoroughly. The numbers here are the most-tested figures on the exam.
The figures that belong to this topic
- Small appliances: 80 percent recovery with pre-November 15, 1993 equipment; with later equipment, 90 percent when the compressor runs, 80 percent when it does not; or evacuate to four inches of mercury vacuum.
- MVAC disposal: reduce to 102 mm of mercury vacuum or follow the motor-vehicle rules.
- Self-contained recovery equipment works without the appliance's own components; system-dependent equipment relies on them.
How to study it
Read the topic in your prep material once for structure, then drill it through the free practice questions, which cite the regulation paragraph behind every answer. On a closed-book exam the citations are your study tool, not your crutch: they teach you why the answer is what it is.
The other topics
| Core | Environmental impact |
| Core | Laws and regulations |
| Core | Changing industry outlook |
| Type sections | Leak detection |
| Type sections | Safety |
| Type sections | Shipping |
| Type sections | Disposal |
The 608 fact sheet
One printable page: the four certification types, the exam structure, the leak-rate and recovery numbers, all cited to the regulation. Free.
No spam. One useful sheet and occasional notes.