One Question per Day (2016.9.4)

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This post was last edited by 68589544 on 2016-9-4 14:26. The importance of occupational safety and health management: Implementing occupational safety and health management practices helps to better protect the legitimate rights and interests of both businesses and employees. It is closely related to the vital interests of each of us in the chemical industry. ‘The task of the ’Occupational Health Edition’ is to disseminate knowledge on occupational health and safety through the platform of the forum. Let’s start with a question of the day – everyone is welcome to participate! Rules for the Daily Question activity: 1. A reward of 3 wealth points is given for replying; active participation earns 1–3 wealth points, correct answers grant 5 wealth points, and in-depth discussions award flowers ； 2. For the “One Image per Day” post, please follow the rules: do not post only emojis, spam, or repeated content; a penalty of 5 wealth points will be applied for each such violation ； 3. The Daily Image post is available for 1-2 days and then closed on the 3rd day. Today’s question: (Single-choice question) When the nature of the harmful environment is unknown, whether oxygen deficiency is present is unknown, and in an oxygen-deficient environment, the appropriate type of respiratory protection for emergency use should be ________, and its use is not permitted________ ； In an environment without oxygen deficiency but with air pollutant concentrations exceeding the IDLH level, the appropriate auxiliary escape breathing protection devices can be ________, or they can be ________, but they must be suitable for that particular type of air _______________. ( ) A. Filter-type, supplied-air type, filter-type, supplied-air type, type and concentration level of pollutants. B. Supplied-air type, filter-type, supplied-air type, filter-type, type and concentration level of pollutants. C. Full-face mask, half-face mask, full-face mask, open-face mask, pollutant concentration level. D. Full-face mask, half-face mask, half-face mask, open-face mask, nature. The correct answer is: B. Promotion activity: [Haichuan Voting] Beautiful blue skies here – please choose the one you think is the most beautiful! http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1613972&page=1#pid16429154