When recovering from a low-pressure chiller with a large charge, the most efficient practice is to:
a.Recover vapor only
b.Recover with the purge unit running
c.Recover only after adding nitrogen
d.Recover liquid first, then vapor
解析
Recovering liquid first moves the bulk of the charge quickly, then vapor recovery pulls the remaining refrigerant down to the required 25 mm Hg absolute. Recovering vapor alone is far slower on a large charge. The purge unit removes air but is not the recovery method.
免费刷完整 240 道题库 — 无需注册。
Own the complete EPA Section 608 Certification guide — PDF + EPUB, $14.99 →
同考点相关题目
- 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:
- The rupture disk on a low-pressure appliance should be:
- A device that automatically maintains the correct refrigerant level between the condenser and evaporator of a low-pressure chiller is the:
- HCFC-123 requires good ventilation during service primarily because it:
最近核对： · 审核流程
PrepPass 团队 · 依据官方资料核对 EPA Section 608 Technician Certification Exam · 我们如何核对