FAA AMT Airframe Practice Exam 2026 – All-in-One Study Guide to Master Aviation Maintenance Technician Certification!

Question: 1 / 1030

What is the condition of the refrigerant as it leaves the evaporator in a vapor cycle cooling system?

Low pressure liquid

High pressure vapor

High pressure liquid

Low pressure vapor

In a vapor cycle cooling system, the refrigerant absorbs heat from the aircraft cabin when passing through the evaporator. As a result, the refrigerant in the evaporator changes from a low-pressure liquid to a low-pressure vapor as it leaves the evaporator. This vapor is then compressed to a high-pressure vapor in the compressor, then condensed into a high-pressure liquid in the condenser, and the cycle repeats.

Option A (Low pressure liquid), Option B (High pressure vapor), and Option C (High pressure liquid) are not the correct conditions for the refrigerant as it leaves the evaporator in a vapor cycle cooling system, making Option D (Low pressure vapor) the correct choice.

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