Daily Safety and Fire Prevention Question (12.25)
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The last edit to this post was made by fight3558586 on 2016-12-25 at 11:06. Multiple-choice question 1: The explosion limit serves as a basis for determining the fire hazard category of areas where gases are produced and stored, and it is also used to decide on the appropriate type of electrical explosion protection. Industrial facilities that produce or store flammable gases with a lower explosion limit of less than ( )%, should use flameproof explosion-proof equipment. A、21 B、16 C、10 D、15. 2、Except in large-scale open spaces, the emergency operating voltage in evacuation areas is ( ). A. Direct current voltage B. Alternating current voltage C. Safe voltage D. Bus voltage Correct answer: C C
1. C, 10； 2. C. Safe voltage