【判断题】【消耗次数:1】
施工升降机上极限开关与上限位开关之间的安全越程不应小于0.30m
正确
错误
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相关题目
【单选题】 施工升降机上极限开关与上限位开关之间的安全越程不应小于( )m;
①  0.25
②  0.15
③  0.3
④  0.4
【判断题】 施工升降机每个吊笼均应安装上、下限位开关和极限开关。
①  正确
②  错误
【判断题】 施工升降机上、下限位开关可用自动复位型,切断的是控制回路。
①  正确
②  错误
【单选题】 施工升降机的组成结构中,由防坠安全器及各安全限位开关组成的是()。
①  安全装置
②  钢结构件
③  传动机构
④  控制系统
【单选题】 下列不属于施工升降机安全装置中安全开关的是
①  A超载保护开关
②  B限位保护开关
③  C限速保护开关
④  D防冲顶限位开关
【判断题】 施工升降机应安装非自动复位型上、下限位开关并应灵敏可靠,上、下限位开关安装位置应符合规范要求;
①  正确
②  错误
【判断题】 施工升降机应安装自动复位型极限开关并应灵敏可靠;
①  正确
②  错误
【判断题】 施工升降机极限开关允许使用自动复位型,切断的是主电路电源。
①  正确
②  错误
【判断题】 物料提升机应安装上行程限位并灵敏可靠,安全越程不应小于2m;
①  正确
②  错误
【判断题】 ??施工升降机每根钢丝绳的安全系数不应小于10,直径不应小于6mm。
①  正确
②  错误
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①  get at
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①  freshman
②  sophomore
③  junior
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①  success
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①  flipping
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③  flipped
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