Refrigeration & Air Conditioning Mechanic Red Seal · Question
When brazing, why is it important to heat the joint evenly?
Even heating allows for the base metals to reach the proper brazing temperature simultaneously. This ensures that the molten filler metal flows via capillary ac
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Question: When brazing, why is it important to heat the joint evenly?
Answer options:
- To ensure the braze metal flows only on one side of the joint
- To prevent the braze metal from overheating and becoming brittle ✅ To allow for capillary action to draw the molten braze metal throughout the joint
- To minimize the amount of braze metal used
Correct answer: To allow for capillary action to draw the molten braze metal throughout the joint
Explanation: Even heating allows for the base metals to reach the proper brazing temperature simultaneously. This ensures that the molten filler metal flows via capillary action throughout the entire joint, creating a strong and leak-tight bond.
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Question explanations
- 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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