ESCO Air Conditioning Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

R-410A is a popular refrigerant used in air conditioning systems. It is a blend of two HFC refrigerants, namely R-32 and R-125. Ammonia (option A) is not the correct compound used in R-410A systems. Option B, R-11, is a chlorofluorocarbon (CFC) refrigerant that is no longer used due to its harmful impact on the ozone layer. Option C, R-12, is a hydrochlorofluorocarbon (HCFC) refrigerant that is also being phased out globally due to its ozone-depleting potential. Option D, R-22, is an HCFC refrigerant that is commonly used in older air conditioning systems but is being replaced by more environmentally friendly refrigerants like R-410A.