FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam 2024 - Free AMT Airframe Practice Questions and Study Guide

As refrigerant enters the condenser in a vapor cycle cooling system, it is in a high pressure state and is in the form of a vapor. This is because the refrigerant has been compressed in the compressor and has not yet passed through the expansion valve, which would cause it to transition back into a low pressure liquid state. Option A is incorrect because the refrigerant is in a state of high pressure, not low pressure, as it enters the condenser. Option B is also incorrect because the refrigerant is in a vapor state, not a liquid state. Option C is incorrect because although the refrigerant will eventually become a high pressure liquid after passing through the condenser, at the point of entering the condenser it is still in a vapor state. Therefore, the correct answer is D, high pressure vapor.