Question id 35 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license

To Prevent Both Pilots From Performing Opposite Trim Inputs.
Because There Are Two Trim Motors.
To Be Able To Use Two Different Trim Speeds, Slow Trim Rate At High Speed And High Trim Rate At Low Speed.
To reduce the probability of a trim runaway.