【Daily Question No. 081】2018.03.22

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【Daily Question No. 081】March 22, 2018: Safety signs are classified into four categories: prohibition signs, ( ), instruction signs, and warning signs. A. Safety signs B. Warning signs C. Supplementary signs D. Hazard signs B (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) For management purposes, if you need to view content from a few days ago, please go through the summary post below. “My Registration Season” event – (currently ongoing in the Chemical Engineering section) https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1897835
Summary post of daily questions for the 2018 Chemical Engineering Technology Training program: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888971
Summary post of daily images for the 2018 Registered Equipment section: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888970
Summary post of Q&A questions related to hydrogen production and hydrogenation technologies in 2018: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888968
Summary post of daily questions for the LNG Technology discussion section in 2018: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888973
Summary post of Q&A questions from 2017 (updates have started): https://bbs.hcbbs.com/thread-1657793-1-1.html
Summary post of daily questions from 2017 (updates have started): https://bbs.hcbbs.com/thread-1657794-1-1.html
Summary post of daily images from 2017: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1875160
List of daily questions for the LNG section in 2017: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1804162
Summary post of Q&A questions from 2016 (updates completed): https://bbs.hcbbs.com/thread-1597792-1-1.html