Question id 388 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license

Pressurising air or gas in order to obtain a reaction force.
Generating a high velocity jet pushing against the outside air.
Accelerating air or gas in order to obtain a reaction force.
Heating up air in order to obtain a reaction force.

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