Daily Question: Methanol Technology Edition 20170920
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There are prizes for correct answers, and prizes as well for responses. By learning from the best practices in the *Brothers section, everyone can improve through asking questions and grow more mature by replying to them. True or False: Gas-filtering masks are suitable for use in work environments where the toxin concentration is less than 2% and the oxygen level is above 18%. The permissible industrial hygiene concentration for carbon monoxide is 30 ppm, and protection is provided by white gas masks. The permissible industrial hygiene concentration for ammonia is 30 ppm, and protection is provided by gray gas cartridges. The permissible industrial hygiene concentration for methanol is 50 ppm, and protection is provided by brown gas cartridges.
Wrong. For the third sentence, ammonia should be in gray, right?
Hehe, it’s okay; reviewing old material helps to gain new insights