Which component is included in hydraulic System A?

• A. Normal brakes
• B. Yaw damper
• C. Ground spoilers
• D. Thrust reversers

Answer: (C)

In hydraulic systems, components are specifically designated for their functions, and ground spoilers are among the components typically included in a hydraulic system, particularly in aviation contexts. Ground spoilers are utilized primarily during landing to reduce lift and increase drag, assisting in the deceleration of the aircraft. They deploy when the aircraft is on the runway, helping to enhance braking efficiency and improve safety.

The inclusion of ground spoilers in a hydraulic system is crucial because the deployment mechanism relies on hydraulic pressure to actuate the spoilers effectively. This is essential for controlling the aircraft's descent and landing dynamics. They are integrated into the hydraulic system to ensure that they can be activated reliably and precisely at the right moment during the landing phase.

In contrast, while normal brakes, yaw dampers, and thrust reversers also play important roles in aircraft systems, they are not the primary components usually referenced when discussing hydraulic System A in this context. Normal brakes might be part of a different hydraulic subsystem, yaw dampers are usually related to stability and control rather than direct hydraulic actuation, and thrust reversers operate independently or can be linked with different hydraulic configurations. Thus, ground spoilers stand out as a specific functional component integrated into hydraulic System A.