One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； April 1st
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Single-choice question: During the shutdown and major maintenance of the calcium carbide process acetylene production system, in order to reduce losses of acetylene gas, the height of the acetylene gas tank should be kept below ( ). A: 10% B: 15% C: 20% D: 30% Answer: B: 15%
During the shutdown and major maintenance of the calcium carbide or acetylene production systems, in order to reduce losses of acetylene gas, the height of the acetylene gas tank should be kept below (D). A: 10% B: 15% C: 20% D: 30%
During the shutdown and major maintenance of the calcium carbide or acetylene-based systems, in order to minimize losses of acetylene gas, the height of the acetylene gas tank should be kept below (B: 15%). A: 10% B: 15% C: 20% D: 30%