[Soda ash knowledge] Daily question (110) 2010.1.21
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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. The water-insoluble matter in soda ash products mainly comes from ( ). A. Calcium and magnesium salts in brine B. Calcium and magnesium salts in lime C. Impurities in ammonia 2. When refining brine by lime soda ash method, in order to complete the magnesium and calcium removal reactions, the refining agent should be (). A. Insufficient B. Enough C. Excess
1. The water-insoluble matter in soda ash products mainly comes from (A). A. Calcium and magnesium salts in brine B. Calcium and magnesium salts in lime C. Impurities in ammonia 2. When refining brine by lime soda ash method, in order to complete the magnesium and calcium removal reactions, the refining agent should be (C). A. Insufficient B. Enough C. Excess
2110.1.21 Soda ash: AC
1. The water-insoluble matter in soda ash products mainly comes from (A). A. Calcium and magnesium salts in brine B. Calcium and magnesium salts in lime C. Impurities in ammonia 2. When refining brine by lime soda ash method, in order to complete the magnesium and calcium removal reactions, the refining agent should be (C). A. Insufficient B. Enough C. Excess