On an aeroplane, spoilers are: - ATPL

Question id 73 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license

Upper Wing Surface Devices, Their Deflection Is Always Asymmetrical.

Lower Wing Surface Devices, Their Deflection Is Symmetrical Or Asymmetrical.

Lower Wing Surface Devices, Their Deflection Is Always Asymmetrical.

Upper wing surface devices, their deflection is symmetrical or asymmetrical.