Refrigeration & Air Conditioning Mechanic Red Seal · Question
When joining dis-similar metals, such as copper to steel, what type of brazing alloy is generally recommended?
Phos-copper alloys are self-fluxing *only* on copper. For joining dissimilar metals like copper to steel, a silver-based alloy with a separate flux is typically
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Question: When joining dis-similar metals, such as copper to steel, what type of brazing alloy is generally recommended?
Answer options:
- Phos-copper alloy (e.g., BCuP-5)
- Tin-antimony solder ✅ Silver-based alloy (e.g., BAg-5)
- Aluminum-silicon alloy
Correct answer: Silver-based alloy (e.g., BAg-5)
Explanation: Phos-copper alloys are self-fluxing only on copper. For joining dissimilar metals like copper to steel, a silver-based alloy with a separate flux is typically required to ensure good wetting and a strong bond.
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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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