Type III — Low-PressureCâu 178 / 240
If a low-pressure chiller's high-pressure limit control trips during operation, the technician should first:
a.Reset it and keep running the machine
b.Investigate the cause before resetting
c.Bypass the control to finish the job
d.Raise the rupture-disk setting
Giải thích
A tripped limit control is a warning that should be investigated, since it may signal non-condensable buildup, water intrusion, or another fault. Simply resetting or bypassing a safety control hides the real problem and is unsafe. Never alter or bypass the rupture disk or limit devices.
Luyện miễn phí toàn bộ 240 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Compared with older designs, a high-efficiency purge unit is desirable because it:
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