Recovery & RecyclingQuestion 226 of 240
Non-condensable gases in a recovery cylinder can cause a falsely high pressure reading. The best way to limit them is to:
a.Heat the cylinder before filling
b.Fill the cylinder faster
c.Keep air out during recovery
d.Add nitrogen to the cylinder
Explanation
Preventing air from entering the system, hoses, and cylinder during recovery keeps non-condensable gases low, which keeps pressure readings accurate and the refrigerant cleaner. Adding nitrogen or heating the cylinder would make the problem worse. Purging air and keeping fittings tight are the correct practices.
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Related questions on this topic
- To avoid cross-contamination when switching from recovering one refrigerant to another, a technician should:
- Low-loss fittings on recovery equipment help compliance by:
- For a small appliance recovered with equipment made after November 15, 1993 while its compressor runs, the required recovery is:
- An EPA-approved testing organization that certifies recovery equipment to EPA standards is, for example:
- The two common DOT specifications for refillable refrigerant recovery cylinders are:
- A technician recovers refrigerant that will be returned to the same owner's system after cleaning. This refrigerant may be:
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