【Daily Question】Utilities - Mechanical & Electrical - 20190205

2019-02-05View Original

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When arc welding is used, appropriate protective measures should be taken when the ambient wind speed reaches () m/s. A. 4 B. 6 C. 8 D. 10 【Answer】C 【Explanation】Welding work must be stopped immediately if appropriate protective measures are not taken in any of the following situations: ① When using arc welding, the wind speed is equal to or greater than 8 m/s ； ②During gas shielded welding, the wind speed should be 2 m/s or higher ； ③Relative humidity greater than 90% ； ④It is raining or snowing ； ⑤When welding pipes, they should be properly supported; the pipes must not be welded while suspended or under external forces. Whenever possible, rotary welding should be used to improve the quality and speed of welding.

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【Daily Question】Utilities - Mechanical & Electrical - 20190205

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