Refrigeration & Air Conditioning Mechanic Red Seal · Question
How do hydrofluorocarbons (HFCs) compare to chlorofluorocarbons (CFCs) regarding ozone depletion and global warming potential?
HFCs (e.g., R-134a, R-410A) do not contain chlorine, resulting in an ODP of zero. While their GWP is significant, it is generally lower than that of many CFCs (
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Question: How do hydrofluorocarbons (HFCs) compare to chlorofluorocarbons (CFCs) regarding ozone depletion and global warming potential?
Answer options:
- HFCs have higher ODP and lower GWP than CFCs. ✅ HFCs have zero ODP and lower GWP than CFCs.
- HFCs have zero ODP and higher GWP than CFCs.
- HFCs have lower ODP and comparable GWP to CFCs.
Correct answer: HFCs have zero ODP and lower GWP than CFCs.
Explanation: HFCs (e.g., R-134a, R-410A) do not contain chlorine, resulting in an ODP of zero. While their GWP is significant, it is generally lower than that of many CFCs (e.g., R-12, R-502), which have both high ODP and GWP.
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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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