操作塔式起重机严禁下列哪些行为?() ["拔桩","斜拉、斜吊","顶升时回转","抬吊同一重物","吊物上站人"]
塔式起重机上必备的安全装置有哪些? ["A.起重量限制器 ","B.力矩限制器 ","C.起升高度限位器 ","D.卷扬限位器 ","E.幅度限制器"]
起重机的拆装作业应在白天进行,当遇有下列那些天气时应停止作业?() ["A.大风 ","B.潮湿 ","C.浓雾 ","D.雨雪 ","E.高温"]
千斤顶不允许在()的情况下使用。 ["超载","超过行程范围","垂直","水平","几台同用"]
用切断机切料时,不得剪切()钢筋。 ["A.直径超过铭牌额定 ","B.强度超过铭牌额定 ","C.多根 ","D.烧红的 ","E.单根"]
下列哪些是塔式起重机拆装工艺编制的主要依据?()