Hydraulic System Basics
This law states that pressure in a confined fluid is transmitted equally in all directions.
What is Pascal's Law?
This component stores excess hydraulic fluid and helps separate air and debris from the fluid.
What is a hydraulic reservoir?
This unit supplies pressurized hydraulic power during an emergency and is deployed in flight if needed.
What is a Ram Air Turbine (RAT)?
This type of hydraulic valve is manually operated to release pressure during servicing.
What is a pressure release valve?
This measure indicates the amount of fluid a pump delivers per minute.
What is flow rate (or volumetric output)?
This device converts mechanical energy into hydraulic energy in a hydraulic system.
What is a hydraulic pump?
This type of pump adjusts its fluid displacement based on system pressure and demand
What is a variable displacement pump?
This component operates hydraulically powered doors and hatchways on an aircraft.
What is a hydraulic actuator?
This type of inspection ensures that hydraulic fluid does not contain harmful contaminants.
What is a fluid sampling test?
This type of pump provides a consistent output regardless of system resistance, making it ideal for fixed-pressure systems.
What is a positive displacement pump?
Aircraft hydraulic systems are lighter and more responsive compared to this other power transmission system.
What is an electrical system?
This valve prevents fluid from flowing backward in a hydraulic system.
What is a check valve (or non-return valve)?
These valves control the flow of pressurized fluid to either side of an actuator.
What are selector valves?
This device seals fluid from leaking but can allow slight seepage for lubrication in high-pressure systems
What is a dynamic seal?
This characteristic of hydraulic fluid ensures it operates effectively across a wide range of temperatures.
What is thermal stability?
The system layout of hydraulic power relies on these interconnected pathways to deliver fluid throughout the aircraft.
What are hydraulic lines (or tubes)?
This part of the hydraulic system stores fluid under pressure and provides energy for emergency operations.
What is a hydraulic accumulator?
This component uses compressed air to provide hydraulic pressure in certain systems.
What is an air-driven pump (ADP)?
This safety device shuts off flow if a sudden pressure drop, like a burst line, is detected.
What is a hydraulic fuse?
This occurs when fluid flow encounters resistance, converting flow energy into system pressure.
What is pressure generation?
This property of hydraulic systems eliminates sloppiness, providing instantaneous response to control inputs.
What is deadbeat response?
These valves ensure landing gear components operate in the correct sequence.
What are sequence valves?
This backup device transfers hydraulic power between two systems without transferring hydraulic fluid.
What is a Power Transfer Unit (PTU)?
This component is used to remove dirt and particles from hydraulic fluid to protect the system's seals and working surfaces.
What is a hydraulic filter?
This term describes the ability of a hydraulic actuator to generate a high force relative to its compact size.
What is force multiplication?