Soar to New Heights with the 2025 Commercial Pilot License (CPL) Practice Exam – Ready for Takeoff!

A spin is defined as an uncontrolled maneuver characterized by high angles of attack, where one wing stalls while the other maintains lift, resulting in a rapid rotation about the vertical axis. During a spin, the aircraft enters a state where the lift generated by the wings is uneven, leading to a loss of control and descent in a corkscrew motion. Understanding this concept is crucial for pilots, as spins require specific recovery techniques and can occur inadvertently if proper stall recovery procedures are not followed.

The other options misrepresent the characteristics of a spin. A controlled descent without stalling does not embody the dynamics of a spin, which is inherently an uncontrolled situation. Similarly, an increase in altitude significantly contradicts the nature of a spin, which results in a loss of altitude. Maintaining a stable flight path at all times is not accurate as spins involve a disruption of that stability. Therefore, recognizing option B accurately reflects the definition of a spin in aviation.