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30 Cards in this Set
- Front
- Back
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A system that combines the use of hydraulics and pneumatics is known by what term
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Hydropneumatics
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Hydraulic flight control system design specifications require what total number of separate systems for operation of the primary flight controls
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two
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What type of hydraulic system has fluid flow but no pressure in the system when the actuating mechanisms are idle
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an open center system
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What is the major difference betweeen an open center hydraulic system and a closed center hydraulic system
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the closed center hydraulic systems selector or directional control valves are arranged in parallel and not in series
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What is the advantage of the open center hydraulic system over the closed center hydraulic system
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continuous pressurization of the system is eliminated
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the hydraulic control valves and actuators that operate the primary flight controls are of what type construction
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tandem construction
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There are a total of how many classes of hydraulic reservoirs
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two
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the fluid quantity of a nonpressurized reservoir is indicated by a float and arm liquidometer. the liquidometer is operated by what means
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mechanically operated
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in an air pressurized reservoir, the fluid quantity is indicate by what means
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the distance the piston rod protrudes from the reservoir end cap
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hydraulic systems that require the use of hand pumps are classified as what type of system
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emergency systems
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what type of hydraulic pump does not require the use of external pressure regulators or unloading valves
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variable displacement pumps
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What type of hydraulic pump is usually driven by a dc wound electric motor
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gear type pump
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The piston type pump (stratopower variable displacement), makel 65WB06006, rated at 3000 psi is capable of delivering how many gallon of fluid per minute
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13 gallons of fluid per minute at 3800 rpm
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Why are relief valves installed in aircraft hydraulic systems
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to relieve excessive pressurized fluid caused from thermal expansion, pressure surges, and the failure of a hydraulic pump's compensator or other regulating devices
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To increase the opening pressure of a thermal relief valve, what action must you take
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turn the adjusting screw clockwise
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In a hydraulic system, what is the purpose of the motor operated shutoff valve
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to shut off the flow of hydraulic fluid to the engine in case of an engine fire
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What is the maximum allowable temperature for navy type of military aircraft hydraulic system
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400 degrees F
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A radiator type hydraulic fluid cooler uses what medium for cooling
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engine fuel
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What component is used to conserve space and provide a means where common fluid lines may come together
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a manifold
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What are the three basic units of a hydraulic filter assembly
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a head assembly, a bowl, and a filter element
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What type of noncleanable filter element is used on most naval aircraft
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5 micron(absolute)
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The differential pressure indicator on a filter assembly is reset by what means once the button is extended
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manually
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to prevent fluid loss when the bowl has been removed, most filter assemblies incorporate what item in the head
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an automatic shutoff valve
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how many general types of accumulators are used on naval aircraft
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two
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what is the correct method to preload an accumulator
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pressurize the fluid chamber with compressed air to a predetermined charge
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to indicate the amount of pressure in a hydraulic system, naval aircraft us what two types of pressure gauges
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direct reading and synchro type
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what component is used to damper out system pressure surges that could cause possible damage to gauges and pressure transmitters and prevent cockpit hydraulic indicators from oscillating and fluctuating
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a gauge and pressure transmitter snubber or snubbers
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what are the three methods currently used for driving emergency system pumps on naval aircraft
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electic motor driven, ram air turbine driven, or hand operated
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what component initiates extension of the ram air turbine assembly
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a spring loaded turbine actuator
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a chemical air dryer cartridge in NOT contaminated when it is what color
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blue
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