【单选题】
水力输送灰（渣）的重量浓度不宜大于___。
A. 25%；
B. 40%；
C. 55%；
D. 60%以上。
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答案
B
解析
暂无解析
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启动时，按控制器电源按钮，指示灯不亮， 电源电压正常，此时电除尘器可能发生了___ 故障。
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通常把交流___确定为人体的安全电流值，当通过人体的电流低于这个数值时，一般人体不会受到伤害。
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D. 50～60Hz、30mA。
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当表盘显示二次电流不稳定，毫安表指针急剧摆动，则可能发生了___。
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警报响、跳闸指示灯亮、电源电压正常、柜内开关接触正常，再次启动后，一、二次表计均无指示，此时电除尘器可能发生了___故障。
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【单选题】
当电除尘器顺气流方向串联4个电场，在气流分布均匀性试验时，只需测量第___电场进口断面的气流分布均匀性，就可表示整台电除尘器的均匀性。
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高压硅整流变压器每台容量约在60～80kVA，一般200～300MW机组配置的电除尘器的变压器容量一般不超过1200kVA，这样每台锅炉安装___台高压硅整流变压器可满足除尘效率为99.9%的要求。
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___适用于粉尘浓度高、容易产生电晕封闭的场合和工况恶劣以及除尘效率低的场合。
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【单选题】
电除尘器供电系统采用___电源，经升压整流后，通过高压直流电缆供给除尘器本体。
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D. 380V，50Hz。
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