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气瓶运输(含装卸）时,严禁烟火,运输可燃气体气瓶时,运输工具上应备有灭火器材。
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等离子弧能量集中、温度高,可得到充分熔透、反面成形均匀的焊缝。
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123电渣焊是一种大厚度工件的高效焊接法。
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泡沫灭火剂指能够与水混溶,并可通过机械或化学反应产生灭火泡沫的灭火剂。
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采用心脏复苏法抢救5分钟后,触电人员仍未恢复心跳和呼 吸,即可停止抢救。
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堆焊内孔壁时,往内孔填砂进行堆焊可提高生产效率。
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水下焊接与热切割时,焊接电源必须用直流电,禁用交流电。
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熔化焊设备的漏电保护器,应每月检查一次,即操作漏电保护器按钮,检查其是否能正常断开电源。
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采用压缩空气的吸压式焊剂回收输送器不可以安装在小车上使用。
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氧-乙炔焰的堆焊工艺与气焊工艺截然不用。
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氧熔剂切割气主要用于切割不锈钢铸件和铸铁件的浇冒口。
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134可以从气瓶压力表压力值的大小换算出液态二氧化碳的贮量。
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生产安全事故是指在生产过程中造成人员伤亡、伤害、职业病、财产损失或其他损失的意外事件。
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可燃性物质发生着火的最低温度,称为着火点或燃点。
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钎焊作业安全生产是为了使钎焊作业生产过程在符合物质条件和工作秩序下进行,防止发生人身伤亡和财产损失等生产事故,消除或控制危险、有害因素,保障人身安全与健康、设备和设施免受损坏、环境免遭破坏的总称。
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在推拉电源闸刀开关时,必须戴绝缘手套,同时头部需偏斜。
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《安全生产法》的核心内容不包括五方运行机制。
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在锅炉等容器或狭小的舱间进行焊割时,应向容器或舱间送风和排气,加强通风。通风时为了提高效果,最好使用氧气。
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在三相三线制的供电系统中,焊机外壳必须设置保护性接零装置。
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发现有人缺氧室息,应迅速将其抬到安全、通风良好的地点抢救。
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在使用割炬时,发生回火应立即关闭氧气阀和乙炔阀,然后关闭预热氧阀。
【判断题】
焊补燃料容器时,操作者应坐在容器上焊接
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气焊切割用的工业氧气,其危险性随着氧气压力的增高而增大。
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两焊件端面之间留有间隙的作用是为了保证焊透。
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直接电击是指人体触及正常工作的带电体,间接电击是指人体触及意外带电体。
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作业场所附近有与明火相抵触的工种,只要小心些,可以焊割。
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水下焊接与切割,它与在大气中焊接与切割相比危险性较小。
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当压力为147kPa表压而温度超过580℃时,乙炔就产生爆炸分解。
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以气体为置换介质时,其用量为被置换容积的3倍以上。
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除了性质较稳定的金、铂、钛、银、钼、钉、铭、锹、依以外,其他金属都能被硝酸溶解。
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熔化焊机中不与地相连接的电气回路,在试验时对个别元件,由于特性限制,允许从电路中拆除或短接。
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焊接时电弧的可见光亮度比肉眼正常承受的光度大1000倍。
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自动焊和手工焊主要用于大型机械设备制造,其设备多安装 在厂房里,作业场所比较固定。
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气瓶储存时,空瓶与实瓶两者应分开放置,并有明显标志。
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