Type III — Low-PressureCâu 169 / 240
Frequent operation of the purge unit on a low-pressure chiller is usually a sign that:
a.The refrigerant charge is too high
b.The machine has a leak drawing air in
c.The compressor is overcharged with oil
d.The condenser water is too cold
Giải thích
A rising purge rate means air is leaking into the vacuum side of the chiller, so the purge unit runs more often to remove it. The correct response is to find and repair the leak, not simply purge more. Modern high-efficiency purge units also track how much they run as a diagnostic.
Luyện miễn phí toàn bộ 240 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Because a low-pressure chiller operates in a vacuum on the low side, what happens when it develops a leak?
- Water entering the refrigerant side of a low-pressure chiller through a leaking tube is dangerous mainly because it can:
- To speed up refrigerant recovery from a low-pressure chiller, a technician should:
- A low-pressure refrigerant is defined as one with a boiling point at atmospheric pressure that is:
- Which gas is safe to use, along with a trace of refrigerant, to raise pressure in a low-pressure appliance for leak detection?
- The 25 mm Hg absolute recovery requirement for low-pressure appliances applies to:
Cập nhật gần nhất: · quy trình kiểm tra
Sen Lin, Người sáng lập PrepPass · Đối chiếu với EPA Section 608 Technician Certification Exam · Quy trình kiểm tra