Type III — Low-Pressure第 175 / 240 题
Compared with older designs, a high-efficiency purge unit is desirable because it:
a.Purges air faster by venting more refrigerant
b.Eliminates the need for leak repair
c.Releases very little refrigerant per pound of air purged
d.Runs continuously to keep pressure high
解析
A high-efficiency purge unit recovers refrigerant vapor before releasing the non-condensable air, so it loses far less refrigerant per pound of air purged than older units. It reduces both refrigerant emissions and operating cost. It does not replace the need to find and repair the air leak causing frequent purging.
免费刷完整 240 道题库 — 无需注册。
同考点相关题目
- The 25 mm Hg absolute recovery requirement for low-pressure appliances applies to:
- 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:
- A technician wants to warm the refrigerant in a low-pressure chiller to speed recovery. Which method is acceptable?
- Low-pressure chillers most commonly use which type of compressor?
- If a low-pressure chiller's high-pressure limit control trips during operation, the technician should first: