Type II — High-PressureCâu 125 / 240
A technician must recover a large liquid charge from a supermarket rack quickly. Which recovery method moves the most refrigerant in the least time for large systems?
a.Vapor recovery through a single low-side port
b.Passive recovery using the system's pressure
c.Recovering only from the compressor oil
d.The push-pull (liquid) method
Giải thích
The push-pull method recovers liquid refrigerant directly and is the fastest way to move a large charge, making it ideal for big systems like supermarket racks. Recovering vapor through a single port is much slower. Push-pull is generally used only when a system holds a substantial liquid charge (roughly 10 to 15 pounds or more).
Luyện miễn phí toàn bộ 240 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A technician uses recovery equipment manufactured after November 15, 1993 on an R-22 split system that normally holds less than 200 pounds of refrigerant. To what level must the appliance be evacuated during recovery?
- A supermarket rack system holds 350 pounds of R-404A. Using recovery equipment manufactured after November 15, 1993, to what vacuum must the technician evacuate during recovery?
- A technician recovers R-22 with an older recovery unit manufactured before November 15, 1993 from a system holding 250 pounds. What is the required evacuation level?
- A technician wants to speed up vapor recovery from an R-410A condensing unit. Which practice will increase recovery speed?
- After replacing a compressor on an R-410A system, a technician needs to remove moisture and noncondensables before charging. Which procedure is the correct way to dehydrate the system?
- During evacuation of a Type II system, a technician wants to confirm the system has reached a deep, dry vacuum. Which instrument gives the precise reading needed?
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