FAA AMT Airframe Test 2026 – 400 Free Practice Questions to Pass the Exam

In a vapor cycle cooling system, freon absorbs heat from the surrounding area and changes from a liquid to a gas in the evaporator. The compressor is responsible for compressing the freon gas, while the expansion valve is responsible for regulating the flow of freon. Condenser is where the gas cools down and changes back to a liquid state, releasing the heat it absorbed in the process. Therefore, these options are incorrect. The correct answer is D, as it accurately describes the process of freon changing from a liquid to a gas in a vapor cycle cooling system.