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One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points; June 03

2016-06-03View Original

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 Single-choice question: The safety valve is one of the important safety accessories on pressure vessels. It should be discharged automatically once a month, and manually tested for discharge once a week; records should be kept along with signatures. It also needs to be regularly inspected, adjusted to the proper pressure, and sealed properly. What is the regular inspection interval? (  ) A. Two years B. One year C. Six months D. Three months Correct answer: B

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