Type II — High-PressureCâu 122 / 240
A technician uses recovery equipment manufactured after November 15, 1993 on an R-22 split system that normally holds less than 200 pounds of refrigerant. To what level must the appliance be evacuated during recovery?
a.0 inches Hg vacuum
b.4 inches Hg vacuum
c.15 inches Hg vacuum
d.10 inches Hg vacuum
Giải thích
For high-pressure appliances containing less than 200 pounds of refrigerant, recovery equipment made after November 15, 1993 must evacuate to 10 inches of mercury vacuum. The 15 inches Hg level applies to appliances holding 200 pounds or more. The lower 0 and 4 inches Hg levels apply only to older equipment made before November 15, 1993.
Trích dẫn luật: 40 CFR §82.156Luyện miễn phí toàn bộ 240 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A technician is certifying to work on R-22 and R-410A air conditioners, supermarket racks, and heat pumps. Which EPA technician type covers high-pressure and very-high-pressure appliances?
- A supermarket rack system holds 350 pounds of R-404A. Using recovery equipment manufactured after November 15, 1993, to what vacuum must the technician evacuate during recovery?
- A technician recovers R-22 with an older recovery unit manufactured before November 15, 1993 from a system holding 250 pounds. What is the required evacuation level?
- A technician must recover a large liquid charge from a supermarket rack quickly. Which recovery method moves the most refrigerant in the least time for large systems?
- A technician wants to speed up vapor recovery from an R-410A condensing unit. Which practice will increase recovery speed?
- After replacing a compressor on an R-410A system, a technician needs to remove moisture and noncondensables before charging. Which procedure is the correct way to dehydrate the system?
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