What is a common example of a location classified under Class 3, Division 1?

Class 3, Division 1 locations are specifically associated with the presence of combustible fibers and flyings, which are significantly ignitable and can pose fire hazards. In environments where easily ignitable fibers are handled, stored, or processed, there is a high risk of explosion or fire, particularly when the fibers become airborne.

These fibers can come from various sources, such as textile or agricultural operations where materials like cotton, paper, or wood flour might be present. The classification is designed to mitigate these hazards, ensuring that facilities take appropriate safety measures to prevent ignition.

The other choices do not align with the criteria for Class 3, Division 1. Non-flammable liquids and heavy machinery do not present the same kind of fire risk associated with ignitable fibers. Similarly, environments handling combustible dust fall under Class 2, as they are primarily focused on combustion hazards related to dust, rather than the ignition risks posed by fibers.