Recovery & RecyclingQuestion 231 of 240
Using recovery equipment made after November 15, 1993, an HCFC-22 appliance containing 200 pounds or more of refrigerant must be evacuated to:
a.0 inches Hg vacuum
b.4 inches Hg vacuum
c.10 inches Hg vacuum
d.25 mm Hg absolute
Explanation
With post-1993 equipment, an HCFC-22 appliance of 200 pounds or more must be evacuated to 10 inches of mercury vacuum, while one under 200 pounds needs only 0 in Hg. The 25 mm Hg absolute level is for low-pressure appliances. Matching refrigerant, size, and equipment age to the number is a common exam task.
Law Reference: 40 CFR §82.156Practice all 240 questions free — no signup required.
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