FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

In a turbine engine, the high-pressure bleed air used for pressurization and air-conditioning comes from the low or high-pressure compressor section. Compressors are responsible for taking in air and compressing it before it enters the combustion chamber. This compressed air is then used for various purposes throughout the engine, including providing bleed air for systems like the air cycle machine that controls pressurization and air-conditioning in the aircraft.

The other options are not correct because:

A. The combustion chamber is where fuel is mixed with the compressed air and ignited to produce hot, high-pressure gases for propulsion.

C. The turbine section is where the hot gases are expanded through turbines to produce mechanical energy to drive the compressor and other accessories.

D. The fan section is responsible for producing a large amount of air that bypasses the engine core for propulsion and cooling purposes in certain engine designs but does not provide high-pressure bleed air for pressurization and air-conditioning.