Liquid cooling system theory, components, and operation

Updated October 25, 2026 · element text from the FAA Aviation Mechanic ACS (FAA-S-ACS-1)

Practice AM.III.J.K10 out loud, free

What the ACS says

Liquid cooling system theory, components, and operation.

A sample oral question on this element

“In a liquid-cooled engine, how is the excess heat carried away from the cylinders?”

Study source: FAA-H-8083-32B (Aviation Maintenance Technician Handbook, Powerplant), chapter 6 and 11, pages 6-32, 11-4

If this code is on your test report

Your Airman Knowledge Test Report (AKTR) lists an ACS code for every knowledge area you missed on the written test. On the A&P oral, each of those codes adds one question to that section, on top of a minimum of four random questions (FAA Mechanic Test Generator FAQ). So if AM.III.J.K10 is on your AKTR, expect the examiner to ask about it. More on how codes turn into oral questions: A&P ACS codes: know your codes before the oral.

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