EPA EPA Refrigerant Types and Properties

Question 1

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

Accepted Answer

CFCs (chlorofluorocarbons)

Answer

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

Question 2

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

Accepted Answer

2,088

Answer

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.

Question 3

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

Accepted Answer

R-1234yf

Answer

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

Question 4

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

Accepted Answer

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

Answer

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

Question 5

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

Accepted Answer

HFC zeotropic blend

Answer

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.

EPA - Environmental Protection Agency Universal Certification Practice Test

EPA - Environmental Protection Agency Universal Certification Practice Test

EPA EPA Refrigerant Types and Properties