Refrigeration & Air Conditioning Mechanic Red Seal · Question
Which refrigerants are considered natural refrigerants?
Natural refrigerants like ammonia (R-717), carbon dioxide (R-744), and hydrocarbons (e.g., propane R-290) are naturally occurring substances.
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Question: Which refrigerants are considered natural refrigerants?
Answer options: ✅ Ammonia, CO2, Hydrocarbons
- CFCs, HCFCs, HFCs
- R-22, R-134a, R-410A
- Synthetic blends, Zeotropes, Azeotropes
Correct answer: Ammonia, CO2, Hydrocarbons
Explanation: Natural refrigerants like ammonia (R-717), carbon dioxide (R-744), and hydrocarbons (e.g., propane R-290) are naturally occurring substances.
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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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