Inspect And Service A Pneumatic Power System Flashcards
What are two basic differences between a hydraulic and a pneumatic system?
The fluid in a pneumatic system is compressible and that used in a hydraulic system is incompressible. A pneumatic system has no return system
What are two functions of a low-pressure pneumatic system in an aircraft?
To operate the gyros in flight instruments, and to inflate pneumatic deicer boots
What type of pump is used in a low-pressure pneumatic system?
A vane-type pump
Why do high-altitude aircraft that have pneumatic gyro instruments use pressure-actuated instruments rather than vaccum-actuated instruments?
At high altitude there is not enough air mass to drive the gyros at their required speed
What effect would a dirty inline air filter have on the operation of pneumatic gyro instruments?
The instruments would not get enough air to spin up to their speed
Of what material are the vanes in a dry type pump made?
Carbon
What kind of device is used to control the speed of movement of the piston in a pneumatic actuator?
A variable orifice
What is the purpose of the moisture separator in a high-pressure pneumatic system?
The separator collects moisture from the air and holds it on a baffle until the system is shut down.
What are two types of filters that are used in an aircraft pneumatic system?
Micronic (paper) type, and screen type.
