SC Refrigeration Practice Questions - South Carolina Refrigeration Contractor Examination Exam

For copper-to-copper refrigerant joints, a common BCuP (phosphorus-bearing) brazing alloy is used because:

Phosphorus makes the alloy self-fluxing on copper, so a separate flux is usually not required on clean copper-to-copper joints It is the only alloy allowed on copper-to-steel joints It melts below 200°F and is classified as soft solder It replaces the need for nitrogen purge

Correct Answer:

Phosphorus makes the alloy self-fluxing on copper, so a separate flux is usually not required on clean copper-to-copper joints

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