Type II — High-Pressure第 151 / 240 题
Virgin (newly produced) HCFC-22 was subject to a production and import phaseout. As of January 1, 2020, what happened to the supply of virgin R-22?
a.R-22 could be vented if recovery was inconvenient
b.R-22 became unregulated and freely available
c.All R-22 equipment had to be destroyed immediately
d.New production and import ended
解析
As of January 1, 2020, the production and import of virgin HCFC-22 was banned in the United States, so only recovered, recycled, or reclaimed R-22 is available to service existing equipment. This makes careful recovery and reclamation more important than ever. Venting R-22 remains illegal, and existing equipment may keep operating.
法律依据: 40 CFR §82.154免费刷完整 240 道题库 — 无需注册。
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同考点相关题目
- A technician is deciding between liquid and vapor recovery on a Type II system with a moderate charge. Which statement correctly compares the two?
- A technician is about to add liquid refrigerant into the suction line of a running compressor to charge faster. Why is this dangerous on a Type II system?
- A technician replaces a leaking evaporator on an R-410A system and must protect the new POE oil during the repair. Why is POE oil handling important?
- A technician measures subcooling of 3°F on a TXV-equipped R-410A system when the manufacturer specifies 10°F of subcooling. What does the low subcooling most likely indicate?
- Before opening a Type II system for a compressor change, a technician recovers the refrigerant. Which sequence best protects both the technician and the environment?
- 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?
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