Soar to New Heights with the 2026 Commercial Pilot License (CPL) Practice Exam – Ready for Takeoff!

The correct answer is a hot air system, which is commonly employed to prevent ice formation on windshields in aviation. This system functions by directing warm air from the aircraft's engine or a dedicated heater into the cockpit area, particularly onto the windshields. The warm air effectively raises the temperature of the glass, preventing moisture from freezing and thereby ensuring that pilots retain clear visibility during flight in cold weather conditions.

In contrast, a pneumatic system typically relies on air pressure and might not provide the necessary heat to counteract freezing conditions. A fluid system generally deals with the circulation of liquids but may not directly address the issue of ice formation on surfaces like windshields. Lastly, a mechanical system would not be designed specifically for temperature regulation, which is essential for preventing ice accumulation. Thus, the hot air system is the most effective solution for this problem in aviation.