Question id 449 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license

Its best efficiency during climb.
In general a worse efficiency than the fixed propeller.
Only above and below the design point a better efficiency than the fixed propeller with the same design speed.
Only at the design speed a better efficiency than the fixed propeller.

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