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 technician's certification type and the day of the week
b.The oil type and the cylinder color
c.The outdoor temperature and the refrigerant color
d.Charge size and recovery-equipment date
Giải thích
Once you know an appliance is high-pressure, 40 CFR §82.156 Table 1 turns on two things: whether its full charge is under 200 pounds or 200 pounds and up, and whether your recovery equipment was made before or after November 15, 1993. With post-1993 equipment a high-pressure appliance is 0 inches Hg under 200 pounds and 10 inches Hg at 200 pounds or more. Certification type, day of the week, oil type, cylinder color and outdoor temperature play no part.
Trích dẫn luật: 40 CFR §82.156Luyện miễn phí toàn bộ 240 câu hỏi — không cần đăng ký.
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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?
- A technician recovers refrigerant from a heat pump in heating mode and is unsure which service port to use. On a heat pump, why must the technician understand the reversing valve position when recovering or charging?
- A commercial refrigeration appliance holds more than 50 pounds of an ozone-depleting refrigerant and has developed a leak. Under the Section 608 leak-repair requirements, what must the owner or operator generally do?
- After evacuating a Type II R-410A system to a deep vacuum, a technician is ready to charge. Which practice supports an accurate final charge?
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