RefrigerationCâu 65 / 110
A micron gauge is used during evacuation to measure what?
a.Refrigerant weight
b.The depth of vacuum in the system
c.Superheat
d.Airflow
Giải thích
A micron gauge measures the absolute pressure (depth of vacuum) far more precisely than a compound gauge, confirming that the system is dry and tight. Technicians pull the system down to a target micron level and perform a decay test. Failure to hold vacuum indicates moisture or a leak.
Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Under EPA Section 608, what must a technician do with refrigerant before opening most systems for service?
- EPA Section 608 certification is required for technicians who do what?
- Evacuating a system with a vacuum pump primarily removes what?
- Which instrument or method is commonly used for pinpointing small refrigerant leaks?
- As a general principle, adding refrigerant charge to a properly running system tends to do what to the low-side pressure?
- A refrigerant metering device such as a fixed orifice or TXV creates what effect on the refrigerant?
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