SkillCat EPA Type 2 Practice Test

Which refrigerant is a hydrofluorocarbon?

R-600A R-1234yf R-12 R-134a

Correct Answer:

R-134a

Explanation:

Hydrofluorocarbons are refrigerants made from carbon, hydrogen and fluorine (no chlorine). R-134a fits this group as 1,1,1,2-tetrafluoroethane, a commonly used HFC refrigerant. The other options aren’t HFCs: R-600A is a hydrocarbon, R-1234yf is a hydrofluoroolefin (an HFO, not an HFC), and R-12 is a chlorinated refrigerant (a CFC). This combination of elements and the absence of chlorine is what makes R-134a an HFC.

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