ch 11 & 12
most industrial facilities with pneumatic systems attempt a maximum duty cycle of ____% for their compressors
100
Depending on the demand of the pneumatic system, receiver safety valves can be found with preset pressures of ___ psi or ___ psi.
110;120
the prime mover in a pneumatic system normally rotates the rotors of a rotary-screw air compressor at speeds between ____ rpm and ____ rpm
3,000; 12,000
temperature in *R is always approximately _____ greater than the temperature in *F
460
centrifugal air compressors are capable of producing up to _____ cfm of airflow
500,000
the fastest air speed in any pneumatic system should be no more than ______
600 fps
in a standard, cubic feet per minute is measurement; it is assumed that air in the environment is at ______ *F and ____%humidity at 14.7 psia
68; 36
______ law states that when temperature remains constant, there is an inverse relationship between pressure and the volume of a gas
Boyle's
_______ states that when the pressure of a gas is constant, the volume of a gas has a direct relationship with its absolute temperature
Charles's law
_______ states that when the volume of a gas is held constant, the pressure exerted by the gas has a direct relationship to its absolute temperature
Gay-Lussac's
a device that increases the pressure of a gas by mechanically decreasing its volume
air compressor
______ vacuum cups have a concave surface and are used to lift objects that are not perfectly aligned
bellow
a _____ air compressor is a type of dynamic air compressor that uses an impeller rotating at high speed to compress air
centrifugal
_____ relief valves are typically installed in systems where there is a large volume of airflow
diaphragm
a ____ cylinder uses compressed air to move the piston in both directions
double-acting
A ______ is a pneumatic flow control valve that controls the amount of airflow through a specific line at a given time
metering valve
a ________ is a specialized vessel that provides storage of gas for use in a pneumatic system
receiver
the duty cycle for most compressors is based on the size of the ______
receiver
a _____ cylinder has a cartridge attached to a piston that slides back and forth within the cylinder barrel
rodless
a ________ air compressor uses an offset rotor in a cam ring to create the increasing and decreasing volumes needed for airflow
rotary-vane
a _______ valve is normally closed pressure control valve that is not adjustable and is used as over pressure protection on pneumatic components
safety
air compressors in pneumatic systems are rated in ________________
standard cubic feet per minute
the advantage of having multiple compressors in smaller decentralized loops is that it is easier ______
to control the air being sent to different parts of the facility
absolute _______ is the hypothetical temperature at which molecular motion ceases, precisely at -273 C
zero
