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EPA Refrigerant Types and Properties Flashcards

6 cards from real EPA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Which refrigerant class has the highest ozone depletion potential (ODP)?

    Answer: CFCs (chlorofluorocarbons)

    CFCs have the highest ODP because they contain chlorine atoms that are very effective at destroying stratospheric ozone.

  2. What is the global warming potential (GWP) of R-22 compared to CO2?

    Answer: 2,088

    R-22 has a GWP of 1,810 relative to CO2 over a 100-year timeframe, meaning it is about 1,810 times more potent as a greenhouse gas.

  3. Which refrigerant is classified as an HFO and has a GWP of less than 1?

    Answer: R-1234yf

    R-1234yf is an HFO refrigerant with a GWP of approximately 4, making it nearly climate-neutral compared to most other refrigerants.

  4. What does the term 'azeotropic' mean when describing a refrigerant blend?

    Answer: The blend behaves as a single refrigerant with a fixed boiling point

    An azeotropic blend behaves like a pure refrigerant with a fixed boiling point, meaning its composition does not change significantly during evaporation or condensation.

  5. R-410A is classified as which type of refrigerant?

    Answer: HFC zeotropic blend

    R-410A is an HFC zeotropic blend of R-32 and R-125, meaning it has zero ozone depletion potential but a high GWP of approximately 2,088.

  6. Which property defines a refrigerant's 'temperature glide'?

    Answer: The temperature range over which a zeotropic blend evaporates at constant pressure

    Temperature glide is the difference between the dew point and bubble point of a zeotropic refrigerant blend as it changes phase at constant pressure.