Commercial Pilot License (CPL) 2025 – 400 Free Practice Questions to Pass the Exam

The inflatable boots used in some ice prevention systems are designed to break the ice accumulation on the leading edges of wings and control surfaces. The pneumatic system operates by inflating and deflating rubber or fabric boots that are mounted on the surfaces where ice can form. When inflated, these boots expand and crack the ice bond, allowing it to fall away from the aircraft. This method is particularly effective during flight, where preventing ice buildup is crucial for maintaining aerodynamic performance and control.

The other systems mentioned operate on different principles. Fluid systems typically involve anti-ice fluids applied to the aircraft, electrical systems use electrical heating elements to prevent ice formation, and hot air systems circulate warm air to de-ice surfaces. Each of these approaches contributes to ice prevention in their unique ways, but the inflatable boots specifically categorize the pneumatic system as the answer for this question.