AFOQT Practice Test

What is the primary function of ailerons?

1. Manage aircraft speed

2. Control roll motion

3. Determine fuel efficiency

4. Stabilize vertical flight

The correct answer is: Control roll motion

Ailerons are crucial aerodynamic devices located on the trailing edge of the wings that primarily control the roll motion of an aircraft. When a pilot moves the control stick or yoke to the left or right, the ailerons move in opposition to each other; one goes up while the other goes down. This differential movement creates a change in lift on each wing, causing the aircraft to roll in the desired direction. Understanding the role of ailerons is vital for effective aircraft maneuvering, particularly during turns. When a pilot wishes to bank the aircraft, the ailerons facilitate this motion, allowing for a controlled and balanced turn. While other controls, such as elevators and rudders, are responsible for pitch and yaw respectively, ailerons solely govern the roll axis. The other options do not align with the primary function of ailerons. Managing aircraft speed pertains more to throttle control and the configuration of the aircraft rather than roll control. Determining fuel efficiency involves various factors including weight, aerodynamics, and engine performance, none of which are directly affected by ailerons. Stabilizing vertical flight is primarily the role of the tail stabilizers and elevator, not ailerons, which are specifically designed for lateral control.