Core (Universal)Question 21 of 240
A technician is recovering R-134a from a high-pressure appliance manufactured after November 15, 1993, that normally holds less than 200 pounds. To what level must the system be evacuated using recovery equipment?
a.0 inches of mercury (Hg) vacuum
b.25 inches Hg vacuum
c.29.9 inches Hg vacuum
d.15 psig positive pressure
Explanation
For a high-pressure appliance normally containing less than 200 pounds and manufactured on or after November 15, 1993, the required recovery level is 0 inches of mercury (Hg) vacuum, meaning down to atmospheric pressure. The deeper 25 inch Hg level applies to low-pressure appliances, and leaving positive pressure would leave refrigerant behind. Recovery levels depend on the appliance type, size, and manufacture date.
Law Reference: 40 CFR §82.156Practice all 240 questions free — no signup required.
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