Nate Core Practice Test 2025 – Comprehensive Exam Prep

The correct answer is an air conditioning system, as these systems are specifically designed to use a refrigerant to absorb heat from inside a building and release it outside, thereby cooling the indoor space. The essential function of air conditioning systems revolves around the refrigeration cycle, which involves the evaporation and condensation of the refrigerant. During this cycle, the refrigerant absorbs heat from the interior, causing it to evaporate and become a gas. This gas is then compressed and transferred outside, where it releases the absorbed heat, condenses back into a liquid, and returns indoors to repeat the cycle.

While other systems listed may involve heat transfer, they do not primarily utilize a refrigerant for cooling in the same way that air conditioning systems do. Ductless mini-split systems, for instance, also utilize refrigerants and can function similarly to air conditioning systems, but they are merely a type of air conditioning system rather than a different category. Geothermal systems use the ground's natural temperature as a heat exchange medium and are typically designed for heating and heating/cooling cycles, but they do not use refrigerants in the same conventional sense as air conditioners. The heating system mentioned usually relies on different methods, such as electric or gas heating, rather than refrigerant-based