[Soda Ash Knowledge] Daily Question (8) 10/11/2009
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Please hide replies; otherwise, no scoring will be given in principle. Specific hiding method: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 Edited posts are not rated. (The topic of this issue is taken from page 60 of “Question Bank for On-the-Job Training of Skilled Workers – Operators in Soda Ash Production”. The electronic version of this book can be downloaded from the Soda Ash Information Sharing Section: http://bbs.hcbbs.com/thread-13140-1-2.html) Multiple-choice questions: 1. The regular points where water enters in the combined soda ash production process are ( ). A. Salt addition point B. Miscellaneous water C. Alkali vehicle washing water 2. The reason why the salt utilization rate in the double-alkali process is higher than that in the ammonia-alkali process is ( ). A. The conversion rate is higher than that of ammonia-alkali, B. The degree of carbonation is higher than that of the ammonia-soda process C. The ammonia-soda process involves recycling. 3. The formation of red alkali is caused by ( ). A. Calcium ions B. Iron ions C. Magnesium ions
1.C 2.C 3.B
1. C 2. C 3. B
1. The regular water inlet point for the joint soda ash production process is (C). A. Salt addition point B. Miscellaneous water C. Alkali truck wash water 2. The reason why the utilization rate of salt in the production of combined alkali is higher than that in the ammonia-soda process is (C). A. The conversion rate is higher than that of ammonia-alkali, B. The degree of carbonation is higher than that of the ammonia-soda process C. The soda ash process involves recycling. 3. The formation of red alkali is caused by (B). A. Calcium ions B. Iron ions C. Magnesium ions
Reference answer: 1. The regular water inlet point for the joint soda ash production process is (C). A. Salt addition point B. Miscellaneous water C. Alkali truck wash water 2. The reason why the salt utilization rate in the production of combined alkali is higher than that in the ammonia-soda process is (C). A. The conversion rate is higher than that of ammonia-alkali, B. The degree of carbonation is higher than that of the ammonia-soda process C. The ammonia-soda process involves recycling. 3. The formation of red alkali is caused by (B). A. Calcium ions B. Iron ions C. Magnesium ions