Type I — Small AppliancesQuestion 117 of 240
A technician evacuates a small appliance to 4 inches Hg vacuum and, after closing the valves, watches the pressure rise back toward zero. What does this rising pressure most likely indicate?
a.The recovery is complete and the reading can be recorded
b.Refrigerant is still boiling out; keep going
c.The appliance is a Type II unit
d.The vacuum pump is oversized
Explanation
A vacuum that rebounds after the valves are closed usually means refrigerant is still coming out of the oil and internal surfaces, so the system is not fully recovered. The technician should continue recovering until the vacuum holds at the required level. A stable 4 inches Hg vacuum is what confirms the small-appliance requirement is met.
Law Reference: 40 CFR §82.156This topic, taught in full in the EPA Section 608 Certification guide. EPA 608 Universal Study Guide (2026) — Core + Type I/II/III, with the 2027 A2L update — PDF + EPUB, $14.99 · 14-day refund →
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Related questions on this topic
- A technician recovers refrigerant from ten small appliances into one recovery cylinder over a day. What must the technician watch to avoid overfilling the cylinder?
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