单选:下列关于火灾自动报警系统设备检测数量要求的叙述中,正确的是()。A.各类消防用电设备主、备电源的自动转换装置,应进行两次转换试验,每次试验均 题目分类:二级消防工程师 题目类型:单选 查看权限:VIP 题目内容: 下列关于火灾自动报警系统设备检测数量要求的叙述中,正确的是()。A.各类消防用电设备主、备电源的自动转换装置,应进行两次转换试验,每次试验均应正常B.电动防火门、防火卷帘,5樘以下的应全部检验,超过5樘的应按实际安装数量30%的比例抽验,但抽验总数不应小于5樘C.防烟排烟风机应全部检验,通风空调和防排烟设备的阀门,应按实际安装数量10%~20%的比例抽验D.电梯应进行5次联动返回首层功能检验,其控制功能、信号均应正常 参考答案: 答案解析:
For many people today, reading is no longer relaxation. To keep up their work... For many people today, reading is no longer relaxation. To keep up their work... 分类:二级消防工程师 题型:单选 查看答案
A hot dog is one of the most popular American foods. It was, named after Fran... A hot dog is one of the most popular American foods. It was, named after Fran... 分类:二级消防工程师 题型:单选 查看答案
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