One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； February 20th
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Multiple-choice question: In the VCM production process using the calcium carbide method, ( ) is used for testing the integrity of hydrogen chloride gas pipelines and equipment, to detect any leaks. A. Soapy water, bubbles B. Ammonia water, white smoke C. Soapy water, white smoke D. Ammonia water, pungent odor Answer: B. Ammonia water, white smoke
In the VCM conversion synthesis process using the calcium carbide method, hydrogen chloride gas pipelines and equipment are tested for leaks using (B), in case a leak is detected. A. Soapy water, bubbles B. Ammonia water, white smoke C. Soapy water, white smoke D. Ammonia water, pungent odor