NM CID ES-1 Practice Questions - New Mexico CID ES-1 Electrical Signs And Outline Lighting Examination Exam

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NEC Article 500 classifies hazardous locations as Class I, Class II, or Class III. Class I locations are those in which which of the following is present in ignitable amounts?

Combustible dust Flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors Easily ignitable fibers or flyings that are not likely to be in suspension Only oxygen-enriched medical air

Correct Answer:

Flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors

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