Type II — High-PressureCâu 157 / 240
A technician is unsure which required vacuum applies to a high-pressure appliance during recovery. Which two factors determine the required evacuation level?
a.The outdoor temperature and the refrigerant color
b.The technician's certification type and the day of the week
c.The oil type and the cylinder color
d.The appliance's refrigerant charge size (under vs. 200 lbs or more) and whether the recovery equipment was made before or after November 15, 1993
Giải thích
The required recovery evacuation level for high-pressure appliances depends on whether the appliance holds less than 200 pounds or 200 pounds or more, and on whether the recovery equipment was manufactured before or after November 15, 1993. For example, post-1993 equipment must reach 10 inches Hg under 200 pounds and 15 inches Hg at 200 pounds or more. Outdoor temperature, oil type, and cylinder color do not set the requirement.
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 performs a standing pressure (leak) test on a repaired Type II system using dry nitrogen. Over several hours the pressure holds steady with no drop. What does this indicate?
- A technician is selecting a vacuum pump to properly dehydrate a Type II R-410A system. Why is a dedicated vacuum pump used instead of the recovery machine to pull the final vacuum?
- A technician retrofitting an R-22 system to an HFC replacement changes the oil and refrigerant. Which additional component is most commonly replaced during the retrofit?
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