NATE LC Refrigeration Practice Questions - NATE Light Commercial Refrigeration Service Specialty Exam

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After brazing and before charging a light commercial system, a technician pulls the system into a deep vacuum. What is the primary purpose of evacuation?

To remove non-condensables and moisture from the system To add the correct refrigerant charge To test the compressor windings To verify superheat at the evaporator

Correct Answer:

To remove non-condensables and moisture from the system

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