ESCO Air Conditioning Practice Exam 2025 – The All-in-One Guide to Exam Success!

In a refrigeration cycle, the component responsible for absorbing heat from the space to be cooled is the evaporator. The evaporator functions by allowing the refrigerant inside to evaporate, which occurs at low pressure and temperature. As air or fluid passes over the evaporator coils, the refrigerant absorbs heat from the surrounding environment, causing it to evaporate from a liquid into a gas. This process effectively lowers the temperature of the space that needs to be cooled.

This is a critical aspect of the refrigeration cycle, as it initiates the heat transfer process. The refrigerant, now in gas form, then moves on to the compressor for further circulation through the system. Other components play different roles: the blower circulates air over the evaporator; the compressor increases the pressure and temperature of the refrigerant gas; and the condenser facilitates the rejection of heat by converting the refrigerant gas back into a liquid. Each component is essential for the complete cycle, but it is the evaporator where the cooling effect begins by absorbing heat.