Air Conditioning Repair Certification (ETI) Practice Exam 2025 - Free Air Conditioning Repair Practice Questions and Study Guide

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What is the purpose of the evaporator coil in an air conditioning system?

To compress refrigerant

To absorb heat from the indoor air

The purpose of the evaporator coil in an air conditioning system is to absorb heat from the indoor air. This component plays a vital role in the cooling process. When warm indoor air passes over the evaporator coil, the refrigerant inside the coil evaporates as it absorbs heat. This process lowers the temperature of the air, which is then circulated back into the living space, creating a cooler environment.

In contrast to compressing refrigerant, which is a function of the compressor located in the outdoor unit, the evaporator coil specifically focuses on heat absorption. Regulating refrigerant flow is a function primarily associated with components like the expansion valve. Discharging heat outdoors is the role of the condenser coil, which releases the absorbed heat after the refrigerant has passed through the evaporator, making it an entirely separate function in the cooling cycle.

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To regulate refrigerant flow

To discharge heat outdoors

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