Wednesday, September 21, 2022
()是保护焊工手臂不受飞溅和辐射损伤防止触电的专用护具。...
Thursday, September 22, 2022
Saturday, September 17, 2022
单选题锅炉采用给水压力法保养时,锅水()。A 无压力B 维护0.05~0.1MPaC 维护0.5MPa...
Wednesday, November 29, 2023
单选题不同厚度的钢板对接焊时,要求对厚板进行削薄处理的目的主要是避免接头处()。A 焊接性能变坏B 力学性能明显下降C 造成过高的应力集中D 产生较严重的焊接缺陷...
Wednesday, January 10, 2024
《容规》要求,压力容器相邻两筒节之间的纵缝及封头拼接焊缝与相邻筒节之间的纵缝应错开,焊缝中心线错开间距应大于筒节厚度的三...
Tuesday, September 20, 2022
问答题燃气锅炉启动时检测程序是: ()燃烧器电机运转 ()燃气泄漏检测 ()启动条件检测 ()风压检测 ()风门开至最大,对炉膛进行前吹扫...
Thursday, July 6, 2023
Thursday, August 24, 2023
Thursday, September 15, 2022
Thursday, August 24, 2023
Thursday, April 25, 2024
Tuesday, September 20, 2022
Friday, January 12, 2024
为防止发生火灾,施焊处离可燃物的距离应至少为()米,且有防火材料遮挡。...
Tuesday, September 20, 2022
填空题焊接电弧中,阳极斑点的温度总是()阴极斑点的温度。...
Monday, December 4, 2023
Thursday, September 15, 2022
多选题下列物理变化过程中不属于散热的是()。A汽化B蒸发C升华D凝结...
Wednesday, November 29, 2023
Wednesday, September 14, 2022
Tuesday, September 20, 2022
单选题手弧焊时,产生气孔的一个原因是()。A 工件上有锈、水、油污等B 坡口角度小C 电弧过短...
Thursday, October 27, 2022