Refrigeration & Air Conditioning Mechanic Red Seal · Question
When brazing refrigerant lines, what gas is typically flowed through the tubing to prevent internal oxidation?
Nitrogen is commonly used as a purge gas during brazing to prevent the formation of copper oxides (scale) inside the tubing.
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Question: When brazing refrigerant lines, what gas is typically flowed through the tubing to prevent internal oxidation?
Answer options: ✅ Nitrogen
- Oxygen
- Argon
- Carbon Dioxide
Correct answer: Nitrogen
Explanation: Nitrogen is commonly used as a purge gas during brazing to prevent the formation of copper oxides (scale) inside the tubing.
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- Which of the following refrigerants is a hydrofluorocarbon (HFC) and has a high ozone depletion potential (ODP
- Which component is responsible for compressing the refrigerant vapour to a high pressure and temperature?
- According to the Canadian Electrical Code (CEC), what is the minimum required working clearance in front of el
- What is the main operating characteristic difference between a fixed orifice (capillary tube) and a Thermostat
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