Type I — Small AppliancesCâu 94 / 240
A technician removes a bolt-on piercing valve after finishing recovery on a refrigerator. Why is leaving a piercing valve on the system long-term discouraged?
a.They are required to be brass and are too expensive to leave
b.Its rubber seal can degrade over time and leak refrigerant
c.Piercing valves increase the refrigerant charge over time
d.They convert the appliance into a Type II system
Giải thích
Bolt-on saddle piercing valves rely on a rubber gasket that can dry out or degrade over time, creating a slow leak. Because avoidable leaks release refrigerant and waste charge, these valves are meant for temporary access. Permanent access is better made with a properly brazed process tube or a soldered access fitting.
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Câu hỏi liên quan cùng chủ đề
- System-dependent (passive) recovery equipment may be used on which of the following?
- During recovery from a small appliance with a working compressor, a technician can only reach 82% recovery before the unit stops pulling down. What should the technician do to comply?
- A shop buys a new recovery machine to service small appliances. Recovery equipment manufactured after November 15, 1993 must meet which requirement?
- While servicing a dehumidifier, a technician accidentally releases a small amount of refrigerant into the room. Which statement reflects the Section 608 venting prohibition?
- A technician is recovering from a small appliance using passive (system-dependent) equipment. To meet the required level, what must be achieved when the compressor is not operating?
- Which EPA technician certification allows a person to service and dispose of small appliances?
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