How many questions are on the NC General Contractors exam?

The contractors exam has has approximately 90 questions and a time limit of 180 minutes. Also know, how hard is the NC General Contractors exam? Test Information Exam Information Exam Fee $106 Number of Questions 115 Passing Score 70% or 81 Questions Time Limit 330 Minutes Subsequently, question is, is the contractor license test hard? …

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What is photochemical smog and what is the chemical formula?

Composition of Photochemical Smog NO2+hν→NO+O. This is a continual cycle that leads only to a temporary increase in net ozone production. To create photochemical smog on the scale observed in Los Angeles, the process must include Volatile organic compounds (VOC’s). Herein, what is photochemical smog and how is it formed? Photochemical smog is a mixture …

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