Day 2 Progress Check Flashcards
What is a significant advantage of hydraulic power pack systems?
They simplify maintenance and reduce the aircraft’s overall weight
What is the primary difference between constant-displacement and variable-displacement pumps?
Constant-displacement pumps deliver a fixed amount of fluid per revolution, while variable-displacement pumps adjust fluid delivery based on system demand
What distinguishes a closed-center hydraulic system from an open-center system?
Fluid is under pressure even when the system is idle
What is the key characteristic of an open-center hydraulic system?
No pressure when idle; fluid circulates back to the reservoir
Which seal type is commonly used to prevent fluid leakage and contamination in hydraulic systems?
Gaskets and packings
What role do filters play in hydraulic systems?
To clean the hydraulic fluid and prevent contamination
Why are heat exchangers critical in hydraulic systems?
They cool the hydraulic fluid and prolong system component life
What role do sequence valves play in a hydraulic system?
They control the order in which different components of the system operate
Which hydraulic system component converts hydraulic energy into mechanical force?
Actuator
Which component is responsible for storing hydraulic energy and providing emergency power?
Accumulator
Which component in a hydraulic system allows fluid to flow in one direction only, preventing backflow?
Check valve
Why are pressurized reservoirs critical in aircraft hydraulic systems?
They ensure positive fluid flow to pumps at high altitudes
What is a major advantage of closed-center hydraulic systems?
They provide constant pressure without requiring continuous pump operation
What is the function of a pressure relief valve in a hydraulic system?
To prevent the system from overpressurization
Which type of hydraulic pump is commonly used to ensure a constant flow of fluid, regardless of system pressure?
Positive-displacement pump
