Question id 163 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license

Passed across an expansion turbine, then compressed and passed through a heat exchanger.
Compressed, then goes through a heat exchanger, and across an expansion turbine.
Compressed, then passed across an expansion turbine and finally across a heat exchanger.
Passed across an expansion turbine, then directly to the heat exchanger.

Training tests and timed exam simulations ATPL - Airline Transport Pilot license