【判断题】
在循环水中加入液氯后，生成的次氯酸，可直接杀死水中微生物
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溶解氧的测定在pH＝9.0的条件下进行
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电导率的大小通常用来比较各物质的导电能力，因为我们通常测定的电导率是电阻的倒数
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卸酸碱时，因为是气压或耐酸（碱）泵，可以不戴面罩和防护手套
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膜电位就是玻璃电极内部与外部溶液之间产生的电位差
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混凝处理用铝盐作混凝剂时，水的pH值太高或太低，对混凝效果都不会有影响
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钠离子浓度计所用的PNa4定位液，其钠离子含量为23mg/L
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在离子交换器再生水平一定的情况下，交换器内的交换层愈高，交换剂的工作容量愈大
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对逆流再生离子交换器，进再生液时，必须严防空气带入，否则易引起乱层，降低交换剂的再生度
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影响蒸汽品质的主要因素，是锅炉通过热力化学试验确定的运行指标，而与锅炉汽包内汽水分离装置和蒸汽清洗装置的效果无关
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锅炉停炉后的联氨保护其主要目的是防止锅炉结垢
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二氧化碳腐蚀和氧腐蚀，因均是腐蚀，所以二者的腐蚀特征没有明显的区别
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化学清洗能使锅炉受热面清洁，因此，对锅炉的化学清洗次数可以不做限制
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H型强酸阳离子交换树脂对水中离子的交换具有选择性，其选择性的规律是离子电导率越高，越易交换
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混合床再生时，反洗分层的好坏主要与反洗分层的阀门操作有关，与树脂的失效程度无关
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一级复床除盐系统运行过程中，阴床出水HSiO3-含量增高，这说明阴床已失效
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联氨除氧的效果与水温，pH值及联氨的过剩量无关
【判断题】
弱碱性阴树脂的作用是除去水中强酸阴离子，因此适于处理含强酸阴离子量大的水
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在酸性溶液中联氨与对二甲基苯甲醛反应能生成柠檬黄色偶氮化合物
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每种酸碱指示剂的颜色变化都有一定的pH范围，称为指示剂的变色范围
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一般金属指示剂本身也是一种带有颜色的络合物
【判断题】
在强酸性、弱酸性、强碱性、弱碱性几种树脂比较中，强碱性阴树脂最易发生化学降解而产生胶溶现象
【判断题】
在单元制一级除盐系统中，如果发现阴床出水的PH值突然降低、含硅量上升、电导率先下降而后又急剧上升，则说明阴、阳床都已失效
【判断题】
弱碱性阴离子交换树脂在pH值为0～7的范围内，才具有较好的交换能力
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弱酸阳离子交换树脂对水中非碳酸盐硬度和中性盐基本无交换能力
【判断题】
弱酸性阳离子交换树脂的作用是除去水中与碱度相对应的阳离子，因此适于处理碱度大的水
【判断题】
有时为了便于混床内部树脂的分离，在反洗分层之前先通入NaOH淋洗，使阴树脂变成OH型，阳树脂变成Na型。因为Na型阳树脂与OH型阴树脂间的密度差小于H型阳树脂与OH型阴树脂间的密度差
【判断题】
碱度测定的结果是酚酞碱度等于甲基橙碱度，则该水样中反映碱度的离子有OH-，无CO32-和HCO3-
【判断题】
化学平衡中如果增加反应物的浓度能破坏它的平衡
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一般来讲，树脂含水率的变化可以作为一个侧面反映树脂内在质量的变化
【判断题】
阳离子交换树脂在使用过程中受活性氯污染后颜色变深，体积增大
【判断题】
离子交换反应的平衡常数随着已交换树脂量的增加而减小
【判断题】
过滤器(池)的水头损失是指水流经滤层时因阻力而产生的压力损失
【判断题】
在机组运行过程中，循环水的碳酸盐硬度应低于循环水的极限碳酸盐硬度
【判断题】
银量法测定水中氯离子时，所需控制溶液的PH值一般在7.0
【判断题】
循环水加稳定剂处理是为了提高循环水的极限碳酸盐硬度，防止凝汽器管及管路结垢
【判断题】
真空除碳器可以除去的气体是CO2、O2和其它气体
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___ I'd like to place an order please.
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