Refrigeration & Air Conditioning Mechanic Red Seal · Question
Which of the following brazing alloys is generally recommended for joining copper to steel in refrigeration systems when working with refrigerants that contain synthetic lubricants, according to CSA B52 Mechanical Refrigeration Code best practices?
BAg-1, a high-silver (50%) cadmium-free alloy, is preferred for copper-to-steel joints due to its excellent wetting properties and ductility, ensuring a strong,
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Question: Which of the following brazing alloys is generally recommended for joining copper to steel in refrigeration systems when working with refrigerants that contain synthetic lubricants, according to CSA B52 Mechanical Refrigeration Code best practices?
Answer options: ✅ BAg-1 (50% silver, cadmium-free)
- BCuP-5 (15% silver, phosphorus-copper)
- Brazing rod containing lead
- Aluminum brazing rod
Correct answer: BAg-1 (50% silver, cadmium-free)
Explanation: BAg-1, a high-silver (50%) cadmium-free alloy, is preferred for copper-to-steel joints due to its excellent wetting properties and ductility, ensuring a strong, leak-tight seal compatible with synthetic lubricants. BCuP alloys are unsuitable for steel as they don't form a strong bond and can embrittle steel. Lead-based solders are prohibited in refrigeration systems.
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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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