HVAC - EPA Certification Practice Exam 2025 – Comprehensive All-in-One Guide to Exam Success!

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What is the primary purpose of a liquid line filter drier?

To decrease the system's energy consumption

To maintain a constant refrigerant pressure

To remove moisture and contaminants from the refrigerant

The primary purpose of a liquid line filter drier is to remove moisture and contaminants from the refrigerant. In HVAC systems, moisture and debris can enter the refrigerant circuit, leading to serious problems such as corrosion, reduced efficiency, and potential system failures. The filter drier not only captures these impurities but also absorbs moisture, helping to protect the components of the system such as the compressor and expansion valve. By ensuring that the refrigerant remains clean and dry, the filter drier plays a crucial role in enhancing the reliability and longevity of the HVAC system. This function is essential for maintaining optimal performance and preventing breakdowns due to unnecessary wear and tear caused by contaminants.

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To increase the refrigerant's cooling efficiency

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