____ locations are those in which flammable gases or vapors are or may be present in the air in quantities sufficient to produce explosive or ignitable mixtures.
A) Class I
B) Class II
C) Class III
D) Class IV

Question

Quizplus · Accepted Answer

Class I locations are defined as hazardous locations where flammable gases or vapors may be present in sufficient quantities to produce explosive or ignitable mixtures. Class II locations involve combustible dust and Class III locations involve ignitable fibers or flyings. Class IV locations do not exist in current classification systems.

____ Locations Are Those in Which Flammable Gases or Vapors