Recovery & Recycling第 236 / 240 题
Using recovery equipment made after November 15, 1993, an appliance using CFC-12 and holding less than 200 pounds must be evacuated to:
a.0 inches Hg vacuum
b.4 inches Hg vacuum
c.15 inches Hg vacuum
d.10 inches Hg vacuum
解析
For other high-pressure refrigerants such as CFC-12, post-1993 equipment must evacuate an appliance under 200 pounds to 10 inches of mercury vacuum, and 200 pounds or more to 15 in Hg. HCFC-22 has its own lower numbers, and 25 mm Hg absolute is for low-pressure. Memorizing the table by refrigerant and size is essential.
法律依据: 40 CFR §82.156免费刷完整 240 道题库 — 无需注册。
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