Type II — High-PressureCâu 147 / 240
A technician recovers R-22 from a rooftop unit that holds 150 pounds using equipment made after November 15, 1993. To what vacuum must the system be evacuated during recovery?
a.10 inches Hg vacuum
b.15 inches Hg vacuum
c.4 inches Hg vacuum
d.0 inches Hg
Giải thích
Because the unit holds less than 200 pounds and the recovery equipment is post-1993, the required recovery evacuation level is 10 inches Hg vacuum. Units holding 200 pounds or more require 15 inches Hg with post-1993 equipment. The 0 and 4 inches Hg figures apply only to pre-1993 recovery equipment.
Trích dẫn luật: 40 CFR §82.156Luyện miễn phí toàn bộ 240 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A technician wants a quick way to know whether a recovery cylinder is a refrigerant recovery cylinder by its color scheme. What is the standard color for a refrigerant recovery cylinder?
- A technician performing recovery notices the process is very slow because the recovery cylinder is warm and its pressure is high. Which action will speed recovery?
- A technician needs to evacuate a Type II system to remove moisture and reaches 500 microns on the micron gauge. After isolating the pump, the reading climbs and stabilizes around 5,000 microns. What does this most likely indicate?
- 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?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với EPA Section 608 Technician Certification Exam · Quy trình kiểm tra