Refrigeration & Air Conditioning Mechanic Red Seal · Question
What is the main concern when mixing different refrigerants in a system?
Mixing refrigerants can lead to unpredictable pressures, chemical reactions, and breakdown of compressor oil, severely damaging the system.
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Question: What is the main concern when mixing different refrigerants in a system?
Answer options:
- Increased system efficiency
- Formation of non-condensable gases ✅ Adverse chemical reactions and lubrication issues
- Reduced compressor wear
Correct answer: Adverse chemical reactions and lubrication issues
Explanation: Mixing refrigerants can lead to unpredictable pressures, chemical reactions, and breakdown of compressor oil, severely damaging the system.
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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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