Answer :
Final answer:
The correct classification for equipment operating in an atmosphere with ignitable fibers is Zone 0.
Explanation:
The correct classification for equipment operating in an atmosphere with ignitable fibers is Zone 0. Zone 0 refers to an area where an explosive gas-air mixture is present continuously or for long periods of time.
Zone classifications are based on the likelihood of an explosive atmosphere being present and the duration of its presence. Zone 0 is the most hazardous classification, followed by Zone 1 and Zone 2.
Examples of equipment suitable for Zone 0 include intrinsically safe devices that cannot produce sparks or other sources of ignition.
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