Type III — Low-Pressure第 172 / 240 题
The 25 mm Hg absolute recovery requirement for low-pressure appliances applies to:
a.Only equipment made after 1993
b.All equipment, of any date
c.Only equipment made before 1993
d.Only chillers over 200 pounds
解析
Unlike the high-pressure evacuation table, the low-pressure requirement of 25 mm Hg absolute is the same for recovery equipment made before or after November 15, 1993. There is no split based on equipment age or chiller size for low-pressure machines. This single deep-vacuum figure is a heavily tested Type III fact.
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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同考点相关题目
- Frequent operation of the purge unit on a low-pressure chiller is usually a sign that:
- 40 CFR §82.152 classifies appliances by their refrigerant's liquid-phase saturation pressure at 104°F. Which range makes an appliance low-pressure?
- Which gas is safe to use, along with a trace of refrigerant, to raise pressure in a low-pressure appliance for leak detection?
- Approximately what inches-of-mercury vacuum reading corresponds to the 25 mm Hg absolute recovery level for low-pressure appliances?
- Non-condensable gases such as air that collect in a low-pressure chiller will:
- Compared with older designs, a high-efficiency purge unit is desirable because it:
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