[Soda ash knowledge] Daily question (111) 2010.1.22
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Please hide the reply. If you do not hide it, you will not be graded in principle. Edited posts will not be graded. Specific hiding methods: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 The title of this issue is taken from page 15 of "Technical Workers Job Training Question Bank-Soda Ash Production Operator". Download the electronic version of the book: http://bbs.hcbbs.com/thread-13140-1-2.html Multiple choice questions: 1. When refining brine by lime-soda ash method, the salt content in the soda ash solution used is ( ). A. 90-96 titer B. 50-60 titer C. 100-150 titer 2. When refining brine by lime soda ash method, the magnesium removal efficiency is (). A. 90%-91% B. 93%-94% C. 98%-99% 3. When making crude brine by lime ammonium carbonate method, in order to complete the magnesium removal reaction, the added Ca(OH)2 should be () A. Excessive amount B. Enough amount C. Insufficient amount
1. When refining brine by lime-soda ash method, the salt content in the soda ash solution used is (A). A. 90-96 titer B. 50-60 titer C. 100-150 titer 2. When refining brine by lime soda ash method, the magnesium removal efficiency is (C). A. 90%-91% B. 93%-94% C. 98%-99% 3. When making crude brine by lime ammonium carbonate method, in order to complete the magnesium removal reaction, the added Ca(OH)2 should be (A) A. Excessive amount B. Enough amount C. Insufficient amount
1.A 2.C 3.A
1.A ； 2.C ； 3.A .