Secondary flight control surfaces include trim tabs and which system?

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Multiple Choice

Secondary flight control surfaces include trim tabs and which system?

Explanation:
Secondary flight control surfaces are used to maintain a steady flight attitude with less pilot input by adjusting the neutral position of primary controls. Trim tabs do this by changing the elevator’s effective position, which is part of the horizontal stabilizer. So trim tabs are associated with and operate within the horizontal stabilizer system, since the elevator sits on the horizontal stabilizer and its trim tab adjusts that elevator’s neutral position. The other options correspond to primary controls or other devices that aren’t the system that houses trim tabs.

Secondary flight control surfaces are used to maintain a steady flight attitude with less pilot input by adjusting the neutral position of primary controls. Trim tabs do this by changing the elevator’s effective position, which is part of the horizontal stabilizer. So trim tabs are associated with and operate within the horizontal stabilizer system, since the elevator sits on the horizontal stabilizer and its trim tab adjusts that elevator’s neutral position. The other options correspond to primary controls or other devices that aren’t the system that houses trim tabs.

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