Commercial Pilot License (CPL) Practice Exam 2025 – The Complete All-in-One Guide to Achieve Your Pilot Certification Success!

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What hydraulic component is commonly used in aircraft?

Flaps

Retractable landing gear

The use of retractable landing gear in aircraft is a prime example of hydraulic components at work. This system enhances aerodynamic efficiency and reduces drag when the landing gear is retracted during flight, which is essential for improving the aircraft's fuel efficiency and overall performance.

Retractable landing gear is typically operated through hydraulic systems because they allow for reliable and powerful actuation of heavy components within an aircraft. The hydraulic system provides the necessary force to lift and lower the landing gear smoothly and quickly. While flaps, ailerons, and elevators are critical control surfaces for managing flight dynamics, they primarily operate through different mechanisms, such as cable systems or electrical actuators, rather than being inherently classified as hydraulic components.

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Ailerons

Elevators

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