NV C-21 Refrigeration And Air Conditioning Practice Questions - Nevada C-21 Refrigeration And Air Conditioning Contractor Examination Exam

Field-erected refrigerant pipe joints on a C-21 system shall be:

Left exposed for visual inspection and testing before they are covered or enclosed Insulated and buried before anyone inspects them so the jacket is not delayed Painted with aluminum paint in lieu of a pressure test Soft-soldered with 50-50 plumber's solder when the refrigerant is Group A2 or A3

Correct Answer:

Left exposed for visual inspection and testing before they are covered or enclosed

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