EPA Section 608 Universal Certification ExamCoreEasy
Which of the following refrigerants is classified as a hydrochlorofluorocarbon (HCFC)?
- AR-22
- BR-134a
- CR-744
- DR-410A
Show answer & explanationAnswer & explanation
Correct answer: A. R-22
R-22 is a common refrigerant that contains hydrogen, chlorine, fluorine, and carbon, making it an HCFC. HCFCs have ozone depletion potential (ODP) but are less damaging than CFCs.
Why the other options are wrong
- B. R-134a is a Hydrofluorocarbon (HFC), containing no chlorine.
- C. R-744 is carbon dioxide (CO2), a natural refrigerant.
- D. R-410A is a blend of HFCs (R-32 and R-125).
HCFC Refrigerant
Hydrochlorofluorocarbons (HCFCs) are refrigerants containing hydrogen, chlorine, fluorine, and carbon. They have an Ozone Depletion Potential (ODP) but are being phased out.
- Contain chlorine, which depletes the ozone layer.
- Have lower ODP than CFCs due to the presence of hydrogen.
- Examples include R-22, R-123.
- Production and import are regulated and being phased out under the Montreal Protocol.
Memory trick: CFCs are bad, HCFCs are next, HFCs are better, natural is best.