One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； November 12th

2016-11-12View Original

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Multiple-choice question: Among the following devices, which ones are not environmental protection devices used in the calcium carbide method for acetylene production? ( ) A. Dust collector B. Water injection tank C. Washing water tank D. Evaporative cooling. Answer: B. Water injection tank, C. Washing water tank, D. Evaporative cooling

Reply #22016-11-12

B. Water injection tank C. Washing water tank D. Evaporative cooling

Reply #32016-11-12

Among the following devices, which ones are not environmental protection devices used in calcium carbide process acetylene generation? ( ) A. Dust collector

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One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； November 12th

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