These are used to relieve the pilot of the need to maintain constant pressure on the flight controls.

• A. Elevator trims
• B. Rudder trims
• C. Wing flaps
• D. Spoilers

Answer: (A)

The main concept is using trim to reduce the need for continuous control input. Elevator trim alters the neutral angle of the elevator so the airplane has a built-in pitching moment that holds a chosen nose position without you having to push or pull on the control wheel. By setting the elevator trim, you let the aircraft maintain a steady pitch in cruise, climb, or descent, and you only need minor adjustments for changes in power or airspeed. This is why elevator trims are the best answer here—they specifically take over the load on the control column for pitch.

Rudder trim relieves pressure on the rudder pedals but is used mainly to balance yaw, such as in crosswinds or engine-out conditions, not to maintain a constant pitch. Wing flaps change lift and drag and are typically set for approach or maneuvering configurations and usually require re-trimming after deployment. Spoilers affect lift and drag and are used for descent control or roll/yaw damping, not for ease of maintaining a steady pitch.