One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； September 4th
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Multiple-choice question: In the calcium carbide process for producing acetylene and sodium hypochlorite used in cleaning, what are the factors that can cause the cleaning effect to fail? ( ) A. Low effective chlorine content in the cleaning solution or high pH value； B、Small amount of detergent required ； C. The quality of calcium carbide is poor, with high levels of phosphorus and sulfur ； D. The clean tower has a small diameter, the packing layer is not high enough, and the empty tower velocity is fast. Answer: ABCD
In the calcium carbide process for acetylene sodium thiosulfate cleaning, what are the reasons that lead to ineffective cleaning? (ABCD) A. Low effective chlorine content in the cleaning agent or high pH value； B、Small amount of detergent required ； C. The quality of calcium carbide is poor, with high levels of phosphorus and sulfur ； D. The diameter of the purification tower is small, the height of the packing layer is insufficient, and the empty tower velocity is high