HVAC - EPA Certification Practice Exam 2026 - Free EPA Certification Practice Questions and Study Guide

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Which refrigerant is commonly known as R-410A?

A mixture of propane and isobutane

Azeotropic refrigerant blend of hydrofluorocarbons (HFCs)

R-410A is classified as an azeotropic refrigerant blend made up of hydrofluorocarbons (HFCs). This blend is specifically designed to replace R-22 in various applications due to its zero ozone depletion potential and better energy efficiency. The azeotropic nature of R-410A means that during phase changes, it behaves more like a pure substance, maintaining consistent properties while evaporating and condensing, which contributes to better performance in HVAC systems.

The components of R-410A consist mainly of R-32 and R-125. Its use is regulated and considered environmentally friendly compared to its predecessors, particularly CFCs that were widely used before the Montreal Protocol aimed at phasing out substances harmful to the ozone layer. Understanding the blend's characteristics helps HVAC professionals in selecting the appropriate refrigerant for systems designed for high-performance cooling and heating applications.

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Pure hydrofluorocarbon

A blend of CFC and HCFC refrigerants

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