Environmental Protection Agency (EPA) MVAC Certification

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Get ready for the EPA MVAC Certification exam with our study materials covering flashcards and multiple choice questions, each offering hints and explanations. Prepare thoroughly for your certification!

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Which compound is an example of hydrofluorocarbons (HFCs)?

R-22
R-134a
R-410A
R-12

The correct answer is: R-134a

The correct choice is R-134a, which is a well-known hydrofluorocarbon (HFC). HFCs are a class of compounds that were developed as replacements for ozone-depleting substances, particularly chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs). R-134a is commonly used in automotive air conditioning systems and as a refrigerant in various applications due to its low toxicity, non-flammability, and minimal effect on ozone depletion. In contrast, R-22 is an HCFC, which is being phased out due to its ozone-depleting potential. R-410A is a blend of HFCs but is not a single compound and has differing properties compared to R-134a. R-12 is a CFC, which has been banned in many applications due to its significant negative impact on the ozone layer. Understanding these designations is crucial for compliance with environmental regulations and for the selection of appropriate refrigerants.