Refrigeration & Air Conditioning Mechanic Red Seal · Question
Which type of oil should be used with HFC refrigerants like R-134a and R-410A?
POE oil is necessary for HFC refrigerants because it is miscible with them, allowing for proper oil return to the compressor.
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Question: Which type of oil should be used with HFC refrigerants like R-134a and R-410A?
Answer options: ✅ POE (Polyolester) oil
- Mineral oil
- Alkylbenzene oil
- Vegetable oil
Correct answer: POE (Polyolester) oil
Explanation: POE oil is necessary for HFC refrigerants because it is miscible with them, allowing for proper oil return to the compressor.
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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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