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