Refrigeration & Air Conditioning Mechanic Red Seal · Question
What type of refrigerant oil is generally used with HFC refrigerants like R-134a and R-410A?
POE oil is highly hygroscopic and miscible with HFC refrigerants, making it the preferred lubricant for these systems.
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Question: What type of refrigerant oil is generally used with HFC refrigerants like R-134a and R-410A?
Answer options: ✅ Polyolester (POE) oil
- Mineral oil
- Alkylbenzene (AB) oil
- Paraffinic oil
Correct answer: Polyolester (POE) oil
Explanation: POE oil is highly hygroscopic and miscible with HFC refrigerants, making it the preferred lubricant for these systems.
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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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