ESCO Air Conditioning Practice Exam 2025 - Free AC Certification Practice Questions and Study Guide

Question: 1 / 400

In the refrigeration cycle, what happens to refrigerant in the evaporator?

It condenses into a liquid

It absorbs heat and changes from liquid to gas

In the refrigeration cycle, the refrigerant's primary role in the evaporator is to absorb heat from the surrounding environment and undergo a phase change from liquid to gas. This process is crucial because it enables the refrigeration system to remove heat from the area that needs to be cooled.

When the refrigerant enters the evaporator, it is in a low-pressure liquid state. As it passes through the evaporator coils, it absorbs heat from the surrounding air or liquid, which causes the refrigerant to vaporize and change into a gas. This heat absorption is what produces the cooling effect inside the refrigerator, air conditioning unit, or other cooling systems.

This understanding of the refrigerant's behavior in the evaporator is central to the operation of refrigeration systems, as it highlights the importance of heat absorption in achieving effective cooling.

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It releases heat and changes from gas to liquid

It evaporates without absorbing heat

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