Air Conditioning Repair Certification (ETI) Practice Exam

Question: 1 / 400

What is the purpose of the expansion valve in an AC system?

To compress the refrigerant

To regulate refrigerant flow to the evaporator

The purpose of the expansion valve in an air conditioning system is to regulate the flow of refrigerant to the evaporator. This component plays a crucial role in ensuring that the refrigerant enters the evaporator at the correct pressure and temperature conditions, allowing it to absorb heat effectively from the surrounding air. By controlling the flow, the expansion valve also helps maintain optimal system efficiency and performance, preventing liquid refrigerant from entering the compressor, which could cause damage.

This regulation of refrigerant flow allows the evaporator to operate effectively, facilitating the cooling process within the air conditioning system. It ensures that there is just the right amount of refrigerant available to absorb heat, which is essential for maintaining desired indoor temperatures.

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To control the temperature of the compressor

To filter impurities from the refrigerant

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