AM CH.12 hydraulic components
Terms
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- A system that combines the use of hydraulics and pneumatics is known by what term
- Hydropneumatics
- Hydraulic flight control system design specifications require what total number of separate systems for operation of the primary flight controls
- two
- What type of hydraulic system has fluid flow but no pressure in the system when the actuating mechanisms are idle
- an open center system
- What is the major difference betweeen an open center hydraulic system and a closed center hydraulic system
- the closed center hydraulic systems selector or directional control valves are arranged in parallel and not in series
- What is the advantage of the open center hydraulic system over the closed center hydraulic system
- continuous pressurization of the system is eliminated
- the hydraulic control valves and actuators that operate the primary flight controls are of what type construction
- tandem construction
- There are a total of how many classes of hydraulic reservoirs
- two
- the fluid quantity of a nonpressurized reservoir is indicated by a float and arm liquidometer. the liquidometer is operated by what means
- mechanically operated
- in an air pressurized reservoir, the fluid quantity is indicate by what means
- the distance the piston rod protrudes from the reservoir end cap
- hydraulic systems that require the use of hand pumps are classified as what type of system
- emergency systems
- what type of hydraulic pump does not require the use of external pressure regulators or unloading valves
- variable displacement pumps
- What type of hydraulic pump is usually driven by a dc wound electric motor
- gear type pump
- The piston type pump (stratopower variable displacement), makel 65WB06006, rated at 3000 psi is capable of delivering how many gallon of fluid per minute
- 13 gallons of fluid per minute at 3800 rpm
- Why are relief valves installed in aircraft hydraulic systems
- to relieve excessive pressurized fluid caused from thermal expansion, pressure surges, and the failure of a hydraulic pump's compensator or other regulating devices
- To increase the opening pressure of a thermal relief valve, what action must you take
- turn the adjusting screw clockwise
- In a hydraulic system, what is the purpose of the motor operated shutoff valve
- to shut off the flow of hydraulic fluid to the engine in case of an engine fire
- What is the maximum allowable temperature for navy type of military aircraft hydraulic system
- 400 degrees F
- A radiator type hydraulic fluid cooler uses what medium for cooling
- engine fuel
- What component is used to conserve space and provide a means where common fluid lines may come together
- a manifold
- What are the three basic units of a hydraulic filter assembly
- a head assembly, a bowl, and a filter element
- What type of noncleanable filter element is used on most naval aircraft
- 5 micron(absolute)
- The differential pressure indicator on a filter assembly is reset by what means once the button is extended
- manually
- to prevent fluid loss when the bowl has been removed, most filter assemblies incorporate what item in the head
- an automatic shutoff valve
- how many general types of accumulators are used on naval aircraft
- two
- what is the correct method to preload an accumulator
- pressurize the fluid chamber with compressed air to a predetermined charge
- to indicate the amount of pressure in a hydraulic system, naval aircraft us what two types of pressure gauges
- direct reading and synchro type
- 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
- a gauge and pressure transmitter snubber or snubbers
- what are the three methods currently used for driving emergency system pumps on naval aircraft
- electic motor driven, ram air turbine driven, or hand operated
- what component initiates extension of the ram air turbine assembly
- a spring loaded turbine actuator
- a chemical air dryer cartridge in NOT contaminated when it is what color
- blue