Name the systems that are powered by hydraulics?

Name the systems that are powered by hydraulics?

• A. Landing gear, Thrust reversers, Spoilers, Nose wheel steering
• B. Landing gear, Thrust reversers, Spoilers, Nose wheel steering, Brakes, PTCU, Rudder
• C. Landing gear, Brakes, APU
• D. Nose wheel steering, Brakes, Lights

Answer: (B)

Hydraulic power is used for actuation that requires high force and quick response, especially for large moving parts and surface controls. The landing gear needs strong, reliable actuators to extend and retract, and the brakes rely on fluid pressure to push pistons that stop the wheels. On the aircraft’s surface controls, nose wheel steering, spoilers, thrust reversers, and the rudder all demand substantial, precise movement, which hydraulics deliver more effectively than many other power sources. The PTCU—Power Transfer/Control Unit—organizes and routes hydraulic power to these actuators, enabling coordinated control of these surfaces and systems. By contrast, lights are electrical, and the APU is a power source rather than a hydraulically actuated system, so they aren’t considered hydraulically powered.

Hydraulic power is used for actuation that requires high force and quick response, especially for large moving parts and surface controls. The landing gear needs strong, reliable actuators to extend and retract, and the brakes rely on fluid pressure to push pistons that stop the wheels. On the aircraft’s surface controls, nose wheel steering, spoilers, thrust reversers, and the rudder all demand substantial, precise movement, which hydraulics deliver more effectively than many other power sources. The PTCU—Power Transfer/Control Unit—organizes and routes hydraulic power to these actuators, enabling coordinated control of these surfaces and systems. By contrast, lights are electrical, and the APU is a power source rather than a hydraulically actuated system, so they aren’t considered hydraulically powered.