Which statement best describes a ground adjustable trim tab?

• A. Movable in flight to adjust trim on a control surface.
• B. Non-movable metal trim tab on a control surface bent on the ground to apply trim forces to the control surface.
• C. An electronic trim control adjustable from the cockpit.
• D. A fixed tab that cannot be adjusted.

Answer: (B)

A ground adjustable trim tab is a small metal tab attached to the trailing edge of a control surface that is bent on the ground to set a specific trim effect, and then remains fixed during flight. This means the pilot cannot alter it in flight; the trim force it provides is constant once you’re airborne. It’s not electronic or cockpit-adjustable, and it’s not a tab you move in flight.

The description matches a tab that is physically bent on the ground to apply trim forces to the control surface, giving a pre-set balance to ease control pressure during flight. The idea is different from an in-flight movable or electronic trim system, and it’s distinct from a tab that is fixed and impossible to adjust at all.