Final answer:
Bleed air used to cool bearings and other parts in a turbine engine is typically extracted from the compressor section of the engine.
Step-by-step explanation:
In a turbine engine, bleed air used to cool bearings and other parts is typically extracted from the compressor section of the engine.
Compressor bleed air is taken from the compressor stages at various points along the compressor section, prior to entering the combustion chamber. This air is at a relatively high temperature and pressure, and is used for a variety of purposes including cooling, pressurization, and other system functions.
For example, a portion of the bleed air may be directed to flow over bearings to remove excess heat and help maintain their optimum operating temperature.