Type I — small appliancesDifficulty 3/5
Using recovery equipment manufactured in 2015 on a small appliance whose compressor no longer runs, what must you achieve?
- ARecover ninety percent of the charge, or evacuate to ten inches of mercury vacuum
- BRecover one hundred percent of the charge before the appliance may be opened at all
- CRecover eighty percent of the charge, or evacuate to four inches of mercury vacuum
- DRecover ninety percent of the charge, or evacuate to four inches of mercury vacuum
Show answer and rationale
Correct: C. Section 82.156(b)(2) makes the ninety percent figure conditional on the compressor functioning. With a dead compressor and post-1993 equipment the requirement drops to eighty percent, and the four inches of mercury option under 82.156(b)(3) remains available either way.
- D — Ninety percent applies only when the appliance's compressor is working; this one is not.
- A — Ten inches of mercury is a Table 1 figure for larger appliances, not a small-appliance option.
- B — The rule never requires complete recovery; it sets percentage and vacuum thresholds instead.