{"name":"印染染化料配制工题库","level":"初级 / 中级 / 高级","org":"人力资源和社会保障部门","count":300,"questions":[{"id":1,"type":"single","stem":"配制活性染料染液时，称取染料后需要先用少量冷水调成糊状，这一步的主要作用是什么","options":["防止染料结块并便于后续溶解","降低染料的水解速度","提高染料的上染百分率","减少元明粉的用量"],"answer":[0],"explanation":"知识点为染料溶解操作。活性染料直接加大量水易结块包心，调糊可使颗粒润湿分散，故A对；调糊不改变水解速率，B错；上染率由染料与纤维反应决定，C错；元明粉用量由染色配方决定，D错。","tier":"基础"},{"id":2,"type":"single","stem":"化验室配制染液时，称量精度要求0.01g，操作人员发现电子天平水平泡偏离中心，正确的下一步处置是什么","options":["调平天平后再重新称量该样品","直接称量并记录偏差值","换用精度0.1g的天平继续称","把样品倒回原瓶后重新取样称量"],"answer":[0],"explanation":"知识点为称量前准备。天平未水平会造成示值偏差，必须先调平再称，故A对；记录偏差不能修正结果，B错；换低精度天平不满足配方要求，C错；倒回原瓶会造成污染，且未解决天平问题，D错。","tier":"进阶"},{"id":3,"type":"single","stem":"配制还原染料悬浮体染液时，常用研磨或高速搅拌的目的与下列哪项最接近","options":["把染料颗粒细化到利于均匀吸附的粒径","使染料分子与烧碱发生化学反应","让染料在染液中完全溶解成真溶液","促进染料与保险粉提前还原成隐色体"],"answer":[0],"explanation":"知识点为还原染料悬浮体染色。研磨是物理细化颗粒，利于均匀上染，故A对；研磨不引发化学反应，B错；还原染料悬浮体并非真溶液，C错；提前还原成隐色体是加保险粉后的工序，D错。","tier":"进阶"},{"id":4,"type":"single","stem":"用移液管量取染液时，放液后管尖残留的一滴液体应当如何处理才算规范","options":["管尖靠壁停留后不再吹出","用洗耳球将残液吹入容器","抖动移液管使残液落下","将移液管倒置让残液流出"],"answer":[0],"explanation":"知识点为移液管使用规范。校准移液管已扣除自然残留，靠壁停留即可，故A对；吹出会超出标示体积，B错；抖动体积不可控，C错；倒置会使残液回流污染，D错。","tier":"进阶"},{"id":5,"type":"single","stem":"配制酸性染料染液时，配方要求用醋酸调节pH至4.5，化验员手边只有硫酸，直接等体积替代会带来什么主要问题","options":["强酸使pH骤降且难以缓冲控制","硫酸与酸性染料发生沉淀反应","硫酸会腐蚀不锈钢染缸内壁","硫酸使染料上染率永久降为零"],"answer":[0],"explanation":"知识点为酸类助剂选择。硫酸是强酸，等体积替代会使pH远低于4.5且波动大，故A对；硫酸一般不使酸性染料沉淀，B错；染缸腐蚀是长期问题非直接主要后果，C错；上染率不会永久为零，D错。","tier":"进阶"},{"id":6,"type":"single","stem":"配制分散染料染液时，染料先用少量温水调浆，再加入分散剂搅拌，正确的加料顺序应是什么","options":["先加分散剂再缓慢加入染料浆","染料与分散剂同时快速倒入","先加染料再补加冷水稀释","先加染料再加热至沸腾后加分散剂"],"answer":[0],"explanation":"知识点为分散染料染液配制程序。先加分散剂使体系稳定，再缓加染料浆可防凝聚，故A对；同时快倒易结团，B错；先加染料后补冷水易析出，C错；沸腾后加分散剂会破坏分散体，D错。","tier":"基础"},{"id":7,"type":"single","stem":"某化验室配制好的染液放置后出现底部沉淀，取样前正确的处理方式是什么","options":["充分搅拌均匀后再取样","取上层清液代表整体","加热使沉淀重新溶解后取样","过滤掉沉淀后取滤液"],"answer":[0],"explanation":"知识点为染液均一性。沉淀会使浓度分层，必须搅匀后取样，故A对；上层清液浓度偏低，B错；加热可能改变染料性质，C错；过滤会去掉部分染料使浓度失真，D错。","tier":"基础"},{"id":8,"type":"single","stem":"配制硫化染料染液时加入硫化钠的主要作用是什么","options":["使染料还原溶解并防止过早氧化","调节染液pH至中性","作为匀染剂降低上染速度","与纤维发生交联反应"],"answer":[0],"explanation":"知识点为硫化染料还原溶解。硫化钠提供还原条件使染料溶解，故A对；硫化钠溶液呈碱性非调中性，B错；它主要起还原溶解作用非匀染，C错；硫化染料不与纤维交联，D错。","tier":"基础"},{"id":9,"type":"single","stem":"配制染液时发现配方中元明粉用量写为200g/L，而该品种常规用量为20~50g/L，化验员正确的做法是什么","options":["先向工艺员核实配方再配制","按200g/L照配并观察染色效果","自行改为20g/L后直接配制","折中按100g/L配制并记录"],"answer":[0],"explanation":"知识点为配方核对与异常处理。用量异常须先核实，故A对；照配可能造成染色失败，B错；擅自改动配方违反程序，C错；折中无依据且掩盖问题，D错。","tier":"挑战"},{"id":10,"type":"single","stem":"用烧碱和保险粉配制还原染料隐色体染液时，保险粉应如何加入才合理","options":["在烧碱溶解并降温后分批加入","与烧碱同时一次性倒入","在染液沸腾时快速加入","先加保险粉再加烧碱溶解"],"answer":[0],"explanation":"知识点为还原染液配制程序。保险粉高温易分解，应在碱性条件下分批加入，故A对；同时倒入局部过热分解，B错；沸腾时加入剧烈分解，C错；先加保险粉缺乏碱保护会失效，D错。","tier":"进阶"},{"id":11,"type":"multi","stem":"关于染化料称量与配制的操作，下列哪些做法符合化验室规范","options":["称量前确认天平已调平并预热","易吸潮染料称量后及时密封","配制染液时按配方顺序加料并搅拌","用同一支移液管连续量取不同染液","称量完毕把剩余染料倒回原瓶"],"answer":[0,1,2],"explanation":"知识点为称量与配制基本规范。调平预热保证称量准确，A对；易吸潮染料密封防潮，B对；按序加料搅拌保证溶解均匀，C对；同一移液管不换会交叉污染，D错；剩余染料倒回易污染原瓶，E错。","tier":"进阶"},{"id":12,"type":"single","stem":"配制活性染料染液时，称取染料后需要先用少量温水调成浆状再稀释，这一步的主要目的是什么","options":["防止染料结块影响溶解均匀性","提高染料的上染百分率","降低染液的表面张力","缩短染料的固色时间"],"answer":[0],"explanation":"知识点：活性染料溶解操作。染料粉料直接加大量水容易抱团结块，先调浆再稀释可使溶解均匀，故A正确；上染百分率由染料亲和力和工艺条件决定，调浆不改变，故B错；调浆不改变表面张力，故C错；固色时间由碱剂和温度决定，故D错。","tier":"基础"},{"id":13,"type":"single","stem":"某化验室配制分散染料染液时，发现染料在常温水中难以润湿分散，正确的处理方式是","options":["直接升温至沸腾后长时间搅拌溶解","先用少量冷水调浆再加热水稀释","加入大量元明粉促进染料分散","用浓硫酸调节pH至2以下助溶"],"answer":[1],"explanation":"知识点：分散染料溶解分散操作。分散染料疏水性强，先用少量冷水调浆可避免粉尘飞扬并初步润湿，再加热水稀释分散，故B正确；直接沸腾易使染料凝聚，故A错；元明粉是促染剂不是分散剂，故C错；浓硫酸会破坏染料结构，故D错。","tier":"挑战"},{"id":14,"type":"single","stem":"用托盘天平称量染化料时，下列操作会直接导致称量结果偏大的是","options":["砝码放在左盘、物品放在右盘","称量前未调节天平零点且指针偏左","称量时物品吸潮后快速称量","读数是按砝码总质量减游码读数"],"answer":[1],"explanation":"知识点：托盘天平使用。指针偏左说明左盘重，未调零就称量会使读数偏大，故B正确；砝码与物品放反但未用游码时结果不变，故A错；吸潮增重使实际质量偏大但读数反映的是当时质量，不算读数偏大，故C错；正常读数应为砝码加游码，减游码会偏小，故D错。","tier":"基础"},{"id":15,"type":"single","stem":"配制酸性染料染液时，处方要求用醋酸调节pH至4.5，化验室现有冰醋酸，正确的稀释操作是","options":["将水倒入冰醋酸中并快速搅拌","将冰醋酸缓慢加入水中并不断搅拌","将冰醋酸与温水同时倒入容器","先加冰醋酸再加沸水稀释"],"answer":[1],"explanation":"知识点：酸液稀释安全操作。稀释浓酸应将酸缓慢加入水中并搅拌散热，故B正确；将水倒入酸中会局部剧烈放热飞溅，故A错；同时倒入无法控制放热，故C错；沸水加剧飞溅且可能影响后续染液，故D错。","tier":"进阶"},{"id":16,"type":"single","stem":"某印染厂化验室配制好一缸染液后放置过夜，第二天使用前发现液面有少量浮沫且底部有沉淀，正确的处置是","options":["搅拌后直接用于染色","过滤沉淀并重新确认浓度后使用","加热使沉淀重新溶解后使用","补加同种染料后直接使用"],"answer":[1],"explanation":"知识点：染液放置后异常判断。出现沉淀说明染料可能析出或与助剂反应，应过滤并重新确认浓度，故B正确；搅拌不能消除沉淀，故A错；加热可能使染料凝聚加重，故C错；补加染料无法解决沉淀且浓度失控，故D错。","tier":"挑战"},{"id":17,"type":"single","stem":"配制还原染料隐色体染液时，处方中保险粉的作用是","options":["作为氧化剂使染料发色","作为还原剂将染料还原为可溶态","作为促染剂提高上染率","作为匀染剂防止色花"],"answer":[1],"explanation":"知识点：还原染料染色原理。保险粉是强还原剂，将还原染料还原为可溶性隐色体钠盐，故B正确；它不是氧化剂，故A错；促染剂通常是元明粉或食盐，故C错；匀染剂是另一类助剂，故D错。","tier":"基础"},{"id":18,"type":"single","stem":"称量1.2500g染料，配成500mL染液，该染液的浓度为多少（单位g/L）","options":["1.25","2.50","5.00","0.25"],"answer":[1],"explanation":"知识点：染液浓度计算。浓度=染料质量/溶液体积=1.2500g÷0.5L=2.50g/L，故B正确；A是直接把质量当浓度，故A错；C多算一倍，故C错；D少算十倍，故D错。","tier":"基础"},{"id":19,"type":"single","stem":"某染液处方要求染料用量为2%（owf），被染物质量为50kg，需称取染料多少克","options":["100g","500g","1000g","2000g"],"answer":[2],"explanation":"知识点：owf用量计算。染料质量=被染物质量×2%=50kg×2%=1kg=1000g，故C正确；A按0.2%算，故A错；B按1%算，故B错；D按4%算，故D错。","tier":"基础"},{"id":20,"type":"single","stem":"某化验室配制染液时，处方要求加入平平加O，其在该染液中的主要作用是","options":["作为氧化剂促进发色","作为匀染剂改善染料分布","作为固色剂提高色牢度","作为还原剂保护染料"],"answer":[1],"explanation":"知识点：常用助剂功能。平平加O是非离子型匀染剂，可改善染料分布、防止色花，故B正确；它不是氧化剂，故A错；固色剂另有其类，故C错；还原剂如保险粉，故D错。","tier":"基础"},{"id":21,"type":"single","stem":"用托盘天平称取元明粉时，砝码应放在哪个盘、被称物应放在哪个盘","options":["砝码放右盘，元明粉放左盘","砝码放左盘，元明粉放右盘","砝码和元明粉都放左盘","砝码和元明粉都放右盘"],"answer":[0],"explanation":"知识点是托盘天平的使用规则：左物右码。正确项符合天平设计原理，砝码放右盘、被称物放左盘。错误项砝码放左盘是照搬电子秤读数习惯造成的混淆；两物同盘无法通过游码平衡读数，实际称量中不会得到正确质量。","tier":"进阶"},{"id":22,"type":"single","stem":"配制活性染料染液时，先用少量冷水将染料调成浆状再加水稀释，这一步的主要作用是","options":["防止染料结块难溶","提高染料上染率","降低染液表面张力","加快染料与纤维反应"],"answer":[0],"explanation":"知识点是染料溶解操作。调浆可使染料颗粒被水润湿分散，避免直接加水时外层先溶胀包裹内层形成团块。提高上染率靠加盐加碱等工艺条件，不是调浆能实现的；降表面张力靠匀染剂等助剂；加快反应靠温度和碱剂，均与调浆无直接关系。","tier":"基础"},{"id":23,"type":"single","stem":"某配方要求配制 200 g/L 的烧碱溶液 500 mL，需称取固体烧碱多少克（不考虑溶解体积变化按 500 mL 计）","options":["100 g","200 g","50 g","250 g"],"answer":[0],"explanation":"知识点是浓度换算：200 g/L×0.5 L=100 g。正确项按体积分数换算得出。200 g 是误把 500 mL 当成 1 L；50 g 是误把 200 g/L 当成 100 g/L 再减半；250 g 是按 500 g/L 计算，属于单位换算错误。","tier":"基础"},{"id":24,"type":"single","stem":"化料时发现染料溶液中有少量未溶颗粒，正确的处理方式是","options":["过滤后再使用并记录该批化料情况","直接倒入染缸随染色过程溶解","加沸水继续搅拌至颗粒消失","静置后取上层清液使用"],"answer":[0],"explanation":"知识点是染液配制质量控制。未溶颗粒会造成色点、色花，正确做法是过滤并记录以便追溯。直接入缸会把颗粒带到织物上形成疵点；加沸水可能使某些染料凝聚或水解；静置取上层会使实际浓度偏低，导致色浅。","tier":"挑战"},{"id":25,"type":"single","stem":"配制酸性染料染锦纶的染液时，通常先加入的助剂是","options":["匀染剂","固色剂","柔软剂","消泡剂"],"answer":[0],"explanation":"知识点是酸性染料染锦纶的助剂加入顺序。匀染剂先加可使染料缓慢均匀上染。固色剂是染色后处理用，提前加会阻碍上染；柔软剂是后整理助剂，入染液会影响染色；消泡剂只在泡沫严重时少量使用，不是常规先加助剂。","tier":"基础"},{"id":26,"type":"single","stem":"用移液管吸取染液时，发现管尖有气泡，正确的做法是","options":["重新吸取使管内无气泡","继续吸取按刻度读数","用洗耳球吹出气泡后读数","将气泡体积从读数中扣除"],"answer":[0],"explanation":"知识点是移液管操作。气泡占据管内体积会使实际吸液量偏少，必须重新吸取。继续读数会使移液体积不准；吹出气泡后液面已变，读数不成立；气泡体积难以准确估计，扣除法不现实也不规范。","tier":"挑战"},{"id":27,"type":"single","stem":"某活性染料配方中元明粉用量为 60 g/L，配制 300 L 染液需称取元明粉多少千克","options":["18 kg","6 kg","180 kg","1.8 kg"],"answer":[0],"explanation":"知识点是配方用量换算：60 g/L×300 L=18000 g=18 kg。6 kg 是误按 20 g/L 计算；180 kg 是多乘了 10；1.8 kg 是少乘了 10，均属单位换算错误。","tier":"基础"},{"id":28,"type":"single","stem":"配制好的染液放置一段时间后出现分层，使用前正确的处理是","options":["搅拌均匀后取样检测再使用","直接取上层清液使用","弃去上层取下层使用","加热至沸腾后直接使用"],"answer":[0],"explanation":"知识点是染液均一性控制。分层说明分散体系不稳定，搅匀后检测才能保证浓度一致。取上层或下层都会使实际浓度偏离配方；加热至沸腾可能破坏染料或助剂性能，不能代替搅匀检测。","tier":"基础"},{"id":29,"type":"single","stem":"某染液配方要求用 40% 浓度的助剂 15 g/L，现只有 60% 浓度的同种助剂，配制 100 L 染液应取 60% 助剂多少千克","options":["1 kg","1.5 kg","0.6 kg","0.9 kg"],"answer":[0],"explanation":"知识点是浓度折算：有效物质量相等，40%×15 g/L×100 L=600 g，需 60% 助剂 600÷0.6=1000 g=1 kg。1.5 kg 是按原浓度直接乘体积；0.6 kg 是把有效物质量当成品量；0.9 kg 是误按 40%/60%×1.5 计算，均属折算错误。","tier":"基础"},{"id":30,"type":"single","stem":"染色车间反映某批染液颜色比标准样深，化验室复查时首先应核对的项目是","options":["染料实际称量与配方用量是否一致","染色温度曲线是否记录完整","织物前处理是否充分","染缸液位是否达到规定值"],"answer":[0],"explanation":"知识点是染液偏深的排查顺序。颜色深首先怀疑染料投料量，核对称量记录最直接。温度曲线影响上染速率但不改变染液浓度；前处理影响匀染性；液位影响浴比但车间反映的是染液本身颜色，应先查化料环节。","tier":"进阶"},{"id":31,"type":"multi","stem":"配制染液时，下列操作中有助于减少染料凝聚的做法有","options":["用温水将染料调浆后稀释","溶解时持续搅拌至无颗粒","将染料直接倒入高浓度电解质溶液中","化料用水先检测硬度并软化","染液配好后立即升温至沸腾"],"answer":[0,1,3],"explanation":"知识点是防止染料凝聚的操作要点。调浆稀释、搅拌溶解、软化水都能减少凝聚。直接倒入高浓度电解质溶液会因盐析使染料聚集；配好后立即沸腾可能使部分染料水解或凝聚，均不利于溶解。","tier":"挑战"},{"id":32,"type":"single","stem":"某化验室配制酸性染料染液时，处方要求用醋酸调节pH，操作工把冰醋酸直接倒入沸腾的染液中，最可能出现的后果是什么","options":["醋酸挥发过快导致pH偏高","局部酸浓度过高使染料凝聚析出","染液温度下降影响上染速率","醋酸与染料发生氧化反应变色"],"answer":[1],"explanation":"知识点：染液配制中酸碱加入方式对染料稳定性的影响。正确项对：冰醋酸直接倒入沸液会造成局部酸浓度过高，使酸性染料凝聚析出。错误项一：醋酸挥发不是主要问题，且会导致pH偏低而非偏高。错误项二：温度略降不是主要危害，凝聚才是关键。错误项三：醋酸与染料一般不发生氧化变色反应。","tier":"基础"},{"id":33,"type":"single","stem":"配制还原染料悬浮体染液时，处方中保险粉的加入时机应控制在什么阶段","options":["与染料干粉一起加入研磨","在染料充分研磨分散后加入","在染液升温至沸腾后加入","在染色完毕降温后加入"],"answer":[1],"explanation":"知识点：还原染料悬浮体配制中保险粉的加入时机。正确项对：保险粉是还原剂，需在染料充分研磨分散后加入，避免过早分解失效。错误项一：与干粉同磨会因摩擦热和空气导致保险粉分解。错误项二：沸腾后加入保险粉分解极快，无法有效还原。错误项三：染色完毕才加已无还原意义。","tier":"进阶"},{"id":34,"type":"single","stem":"化验室用分析天平称取0.5000g染料，发现天平水平泡偏移，正确的处置是什么","options":["直接称量并记录读数","调平水平泡后再称量","增加称量量以减小误差","换用托盘天平完成称量"],"answer":[1],"explanation":"知识点：分析天平使用前的检查与调平。正确项对：天平水平泡偏移会影响称量准确性，必须先调平再称量。错误项一：未调平直接称量读数不准。错误项二：增加称量量不能消除因倾斜带来的系统误差。错误项三：托盘天平精度远低于分析天平，不能替代。","tier":"挑战"},{"id":35,"type":"single","stem":"配制分散染料染液时，处方要求用温水化料，操作工用80℃以上热水直接冲入染料，最可能导致什么问题","options":["染料颗粒团聚形成难分散的疙瘩","染料溶解度提高上染更均匀","染液pH自动升高影响色泽","染料发生还原反应颜色变浅"],"answer":[0],"explanation":"知识点：分散染料化料温度对分散稳定性的影响。正确项对：分散染料遇高温热水易使颗粒表面软化粘结，形成难分散的疙瘩。错误项一：分散染料并非真溶液，溶解度提高不是主要问题。错误项二：水温不会自动升高pH。错误项三：还原反应需还原剂参与，单纯热水不会引起。","tier":"进阶"},{"id":36,"type":"single","stem":"某操作工在配制染液时，先用电子秤称取助剂再加入染料，发现染料称量值比处方少了0.2g，正确的下一步处置是什么","options":["把助剂倒掉重新称量全部物料","补加0.2g染料后继续配制","记录实际用量并按实际配比调整","直接按处方量加水定容使用"],"answer":[2],"explanation":"知识点：染液配制中称量偏差的记录与调整原则。正确项对：发现偏差应如实记录实际用量并按实际配比调整，保证配比准确可追溯。错误项一：倒掉全部物料造成浪费，且不能解决记录问题。错误项二：补加后若不再复核仍可能存在偏差，且未记录。错误项三：按处方定容而不顾实际染料量会使浓度不准。","tier":"进阶"},{"id":37,"type":"single","stem":"配制阳离子染料染液时，处方要求用醋酸-醋酸钠缓冲液，操作工只加了醋酸，最可能造成的后果是什么","options":["染液pH过低且不稳定","染液pH过高使染料沉淀","缓冲能力增强上染更均匀","醋酸钠与染料发生络合"],"answer":[0],"explanation":"知识点：缓冲液配制中醋酸与醋酸钠的协同作用。正确项对：只加醋酸无醋酸钠，无法形成缓冲体系，pH偏低且不稳定。错误项一：只加醋酸pH会偏低而非偏高。错误项二：缓冲能力需两种组分共存，单加一种不会增强。错误项三：醋酸钠主要起缓冲作用，不是与染料络合。","tier":"基础"},{"id":38,"type":"single","stem":"化验室配制染液时，用移液管量取浓硫酸，正确的操作是什么","options":["用嘴吸移液管吸取浓硫酸","用洗耳球吸取并缓慢放入水中","把水倒入浓硫酸中稀释","在量筒中快速搅拌稀释"],"answer":[1],"explanation":"知识点：浓硫酸稀释的安全操作。正确项对：用洗耳球吸取浓硫酸并缓慢加入水中，边加边搅拌，防止局部过热飞溅。错误项一：用嘴吸浓硫酸极其危险，禁止。错误项二：水倒入浓硫酸会剧烈放热飞溅。错误项三：量筒不耐热且快速搅拌加剧飞溅风险。","tier":"基础"},{"id":39,"type":"single","stem":"某染色车间配制活性染料染液时，发现染液中有少量不溶颗粒，操作工的正确处置是什么","options":["直接倒入染缸以免浪费染料","过滤后再使用并记录异常","加温至沸腾使颗粒溶解","加碱促进颗粒溶解后使用"],"answer":[1],"explanation":"知识点：染液配制后不溶颗粒的处置。正确项对：不溶颗粒会造成色点疵布，应过滤后使用并记录异常以便追溯。错误项一：直接倒入染缸会产生色点疵布。错误项二：活性染料颗粒加温沸腾不一定溶解，反而可能凝聚。错误项三：加碱会促使染料水解，不能解决颗粒问题。","tier":"挑战"},{"id":40,"type":"single","stem":"配制涂料印花色浆时，处方中增稠剂的加入顺序应如何安排","options":["先加增稠剂再加水搅拌","在颜料和助剂分散均匀后缓慢加入","与颜料干粉一起高速搅拌加入","在印花前最后一刻快速加入"],"answer":[1],"explanation":"知识点：涂料色浆配制中增稠剂的加入顺序。正确项对：增稠剂应在颜料和助剂分散均匀后缓慢加入，避免局部过浓形成胶块。错误项一：先加增稠剂再加水易形成胶团难分散。错误项二：与干粉高速搅拌会破坏增稠剂结构。错误项三：最后一刻快速加入来不及充分溶胀分散。","tier":"基础"},{"id":41,"type":"single","stem":"某化验室打样时，处方要求染液浴比为1:20，称取染料2.0g，配制200mL染液，操作工按浴比计算后加水至200mL，该操作是否正确","options":["正确，浴比1:20即染料与水的比例","错误，浴比是织物质量与染液体积之比","正确，200mL对应2.0g染料符合处方","错误，应先加助剂再定容至200mL"],"answer":[1],"explanation":"知识点：浴比的定义与计算。正确项对：浴比是织物质量与染液体积之比，不是染料与水之比，操作工理解错误。错误项一：把浴比理解为染料与水比例是常见错误。错误项三：定容顺序不是本题关键，核心是浴比定义错误。错误项四：加助剂顺序不影响浴比定义的正确性。","tier":"进阶"},{"id":42,"type":"multi","stem":"配制染液过程中，下列哪些做法有助于保证称量和配比的准确性","options":["称量前校准电子天平并调平","每次称量后记录实际读数","用同一容器连续称取不同染料不清理","定容时以弯月面最低点与刻度线相切为准","染料结块时直接整块投入溶解"],"answer":[0,1,3],"explanation":"知识点：染液配制中保证称量与配比准确的操作要点。正确项一：称量前校准调平是保证准确的前提。正确项二：记录实际读数便于追溯和调整。正确项三：定容读数规范保证体积准确。错误项一：同一容器不清理会造成交叉污染和残留误差。错误项二：结块整块投入难以溶解均匀，影响浓度准确。","tier":"进阶"},{"id":43,"type":"single","stem":"配制活性染料染液时，称取染料后需要先用少量冷水调成糊状再加热水溶解，这一步操作的主要目的是什么？","options":["防止染料结块并促进均匀溶解","提高染料的上染百分率","降低染料的直接性","缩短固色阶段的处理时间"],"answer":[0],"explanation":"知识点：活性染料溶解操作。正确项对：先冷水调糊可避免染料颗粒被热水包裹形成团块，再加温水或热水使其充分溶解。错误项错在：上染百分率由染料亲和力与工艺条件决定，调糊不改变这一点；直接性属染料固有属性，调糊不改变；固色时间由固色工艺控制，与调糊操作无关。","tier":"基础"},{"id":44,"type":"single","stem":"化验室配制酸性染料染液时，配方要求染料用量为对织物重2%（owf），织物重50g，则称取染料应为多少克？","options":["0.5g","1.0g","2.0g","2.5g"],"answer":[1],"explanation":"知识点：owf浓度计算。正确项对：2%×50g=1.0g。错误项错在：0.5g是按1%计算的结果；2.0g是把百分数直接当克数而未乘织物重；2.5g是按5%计算的结果。","tier":"基础"},{"id":45,"type":"single","stem":"配制还原染料悬浮体染液时，通常需要加入分散剂并经过研磨，其主要作用是什么？","options":["使染料颗粒细化并稳定悬浮","提高保险粉的还原能力","中和染液中的碱性物质","增加染液对纤维的亲和力"],"answer":[0],"explanation":"知识点：还原染料悬浮体配制。正确项对：研磨加分散剂使染料颗粒细化并防止聚集沉降，保证悬浮体均匀稳定。错误项错在：保险粉还原能力由其浓度和温度决定，分散剂不提高还原能力；中和碱性应由酸剂完成，分散剂无此作用；亲和力由染料结构决定，分散剂不增加亲和力。","tier":"基础"},{"id":46,"type":"single","stem":"配制分散染料染液时，染液温度过高可能导致染料发生哪种变化而影响染色质量？","options":["染料发生还原分解","染料颗粒发生结晶聚集","染料与纤维发生共价结合","染料被氧化成不溶性色淀"],"answer":[1],"explanation":"知识点：分散染料高温稳定性。正确项对：分散染料在过高温度下部分颗粒会结晶长大或聚集，造成色点和染色不匀。错误项错在：还原分解多发生于还原染料或高温碱性还原条件；共价结合是活性染料的特征；氧化成色淀多见于硫化或还原染料的氧化工序。","tier":"挑战"},{"id":47,"type":"single","stem":"某化验室配制染液时发现染料称量后未及时溶解，染料在空气中吸潮结块，此时正确的处置方式是？","options":["直接加入热水搅拌使其散开","将结块研碎后按原配方量溶解","重新称取染料并将结块报废","补加少量分散剂后一起溶解"],"answer":[2],"explanation":"知识点：染料称量与吸潮处置。正确项对：吸潮结块后实际染料含量已变化，应重新称取新染料，结块报废，保证配方准确。错误项错在：直接加热水搅拌难以完全溶解且浓度不准；研碎后仍含水分，称量偏差；补加分散剂只能助分散，不能纠正浓度偏差。","tier":"挑战"},{"id":48,"type":"multi","stem":"配制染液时，为保证称量和配液准确，下列操作中正确的有哪些？","options":["称量前确认天平水平并校准","染料称取后及时溶解避免吸潮","配制完毕记录实际用量和批号","称量时用手直接抓取染料以节省时间","染液配制后无需过滤直接使用"],"answer":[0,1,2],"explanation":"知识点：染化料称量与配液规范。正确项对：天平校准保证称量准确；及时溶解防吸潮结块；记录用量和批号便于追溯。错误项错在：手直接抓取染料会污染和影响称量准确；不过滤可能带入未溶颗粒造成色点，应视工艺要求过滤后使用。","tier":"挑战"},{"id":49,"type":"single","stem":"活性染料化料时，称取染料后先加入少量冷水调成浆状，再补热水稀释，这一步操作的主要目的是什么","options":["防止染料结块并便于均匀溶解","提高染料的水解稳定性","降低染料对纤维的直接性","减少染液中的泡沫量"],"answer":[0],"explanation":"知识点：活性染料化料操作要点。正确项：先用少量冷水调浆可避免染料颗粒直接遇热水抱团结块，再补热水稀释能使其均匀溶解。错误项：水解稳定性主要受温度与碱剂影响，与调浆顺序无关；直接性由染料结构决定，调浆不改变；泡沫量与调浆顺序无直接关系。","tier":"基础"},{"id":50,"type":"multi","stem":"化验室配制还原染料悬浮体染液时，下列操作中符合规范的有哪些","options":["研磨时控制染料与分散剂比例并按工艺加适量水","研磨后染液经搅拌再过规定目数筛网后使用","研磨时间越长染料颗粒越细，可随意延长研磨时间","研磨后染液静置出现分层时搅匀后直接用于浸轧","研磨设备每次换色时用清水冲洗即可继续使用"],"answer":[0,1],"explanation":"知识点：还原染料悬浮体染液的研磨、过滤与设备清洁。正确项：控制染料与分散剂比例并加适量水是保证研磨效果的基础；研磨后搅拌过筛可去除粗颗粒，避免染色疵点。错误项：研磨时间过长会使颗粒过细反而影响上染且浪费能耗；出现分层说明分散不良，搅匀直接使用会造成色花；换色时仅用清水冲洗无法去除残留染料，应用适当清洗剂清洗。","tier":"挑战"},{"id":51,"type":"single","stem":"配制活性染料染液时，称取染料后先用少量冷水调成浆状，再加温水稀释，这一步操作的主要目的是什么","options":["防止染料结块并便于均匀分散","使染料与冷水发生预水解反应","降低染料溶解度以便后续过滤","让染料颗粒提前沉降便于称量"],"answer":[0],"explanation":"知识点：染料溶解操作。先用冷水调浆可避免染料颗粒直接遇热水抱团结块，再稀释可均匀分散。B错在冷水调浆不是为了让染料预水解，预水解反而会降低固色率；C错在降低溶解度与配制目标相反；D错在沉降不是调浆目的，反而会造成浓度不均。","tier":"基础"},{"id":52,"type":"single","stem":"某化验室配制还原染料悬浮体染液时，发现染料颗粒研磨后仍有粗颗粒，正确的下一步处置是什么","options":["延长研磨时间并过筛后再使用","直接加入染缸并提高染色温度","补加分散剂后立即升温至沸腾","将染液静置后取上层清液使用"],"answer":[0],"explanation":"知识点：还原染料悬浮体配制。粗颗粒会影响匀染和色光，应继续研磨并过筛确认细度合格。B错在粗颗粒直接入缸会造成色点疵布；C错在补分散剂不能消除粗颗粒，升温也不能使粗颗粒溶解；D错在取上层清液会改变染液浓度，弃去粗颗粒导致配方失准。","tier":"进阶"},{"id":53,"type":"single","stem":"配制酸性染料染液时，化验室规定先加染料再加酸，若操作顺序颠倒先加酸后加染料，最可能出现的现象是什么","options":["染料遇酸析出沉淀或产生色点","染料溶解度提高使上染更快","酸与染料发生酯化反应失效","染液pH升高导致色光变暗"],"answer":[0],"explanation":"知识点：酸性染料溶解与加酸顺序。先加酸会使局部pH过低，部分酸性染料析出或凝聚，造成沉淀、色点。B错在溶解度提高与析出相反；C错在酯化反应并非酸性染料遇酸的典型问题；D错在先加酸使pH降低而非升高。","tier":"基础"},{"id":54,"type":"single","stem":"用电子天平称量染化料时，称量纸放在秤盘上后未按去皮键就直接加料读数，这会导致什么结果","options":["读数包含了称量纸的质量使染料实际偏少","读数不受影响因为称量纸质量可忽略","读数偏小使染料实际称多","天平会自动扣除称量纸质量"],"answer":[0],"explanation":"知识点：电子天平去皮操作。未去皮时显示值为染料加称量纸总质量，按该值当染料质量会导致实际染料偏少。B错在称量纸质量不可忽略，尤其小样称量时影响大；C错在读数偏大而非偏小；D错在普通电子天平不会自动识别并扣除称量纸质量。","tier":"进阶"},{"id":55,"type":"single","stem":"配制分散染料染液时，染料先用少量温水调浆，再在搅拌下加入规定温度的水中，若水温过高最可能造成什么后果","options":["染料颗粒团聚形成难分散的凝块","染料溶解度下降析出结晶","分散剂失效使染液黏度骤降","染料发生还原分解色光变艳"],"answer":[0],"explanation":"知识点：分散染料配制温度控制。分散染料靠分散剂悬浮，水温过高易使颗粒团聚或分散剂浊点问题导致凝块。B错在分散染料本非真溶，不存在溶解度下降析出的主要问题；C错在黏度骤降不是典型后果；D错在还原分解不是高温调浆的主要风险。","tier":"进阶"},{"id":56,"type":"single","stem":"某染色车间配制好的一缸染液放置过夜后使用，使用前化验员发现液面有浮沫且底部有沉积，正确的处置是什么","options":["重新搅拌并检测浓度确认均匀后再用","直接使用因为染色时缸内会搅拌","加热溶解沉积后不检测浓度直接用","过滤掉沉积物后按原配方补加染料"],"answer":[0],"explanation":"知识点：染液放置后均匀性检查。放置后可能分层或沉积，应重新搅拌并检测浓度确认合格再用。B错在染色缸搅拌不能保证沉积染料完全分散，易造成色差；C错在加热溶解后不检测浓度仍可能偏离配方；D错在过滤后补加量无法凭原配方确定，应检测后调整。","tier":"挑战"},{"id":57,"type":"single","stem":"配制阳离子染料染液时，化验员将染料直接加入含阴离子助剂的溶液中，立即出现絮状物，这说明什么并应如何处理","options":["阴阳离子电荷作用产生沉淀，应分开化料后再合并","染料未完全溶解，应加热继续搅拌","助剂浓度过高，应补加水稀释","染料变质，应更换新染料重新配制"],"answer":[0],"explanation":"知识点：阳离子染料与阴离子助剂配伍。两者电荷相反易生成不溶性络合物沉淀，应分别溶解稀释后再缓慢合并。B错在絮状物是电荷反应而非未溶；C错在补加水不能消除已形成的沉淀；D错在现象由配伍引起，换染料不解决助剂冲突。","tier":"进阶"},{"id":58,"type":"single","stem":"配制染液时需将浓染液稀释，若取母液10mL稀释至250mL，稀释倍数是多少","options":["25倍","24倍","10倍","250倍"],"answer":[0],"explanation":"知识点：稀释倍数计算。稀释倍数=稀释后体积÷取用母液体积=250÷10=25。B错在把稀释倍数算成250减10；C错在只看母液体积；D错在把稀释后体积直接当倍数。","tier":"进阶"},{"id":59,"type":"single","stem":"某化验室配制染液用水为硬水，钙镁离子含量较高，用于配制活性染料染液时最可能影响什么","options":["与染料或助剂结合影响得色和匀染","提高染料溶解度使上染率增加","使染液pH自动降低无需调酸","加快染料与纤维反应提高固色率"],"answer":[0],"explanation":"知识点：水质对染液配制的影响。硬水中钙镁离子会与染料或助剂结合，影响溶解、得色和匀染。B错在硬水一般不提高上染率反而可能降低；C错在硬水不会自动调低pH；D错在固色率受pH和温度等控制，硬水不提高固色率。","tier":"进阶"},{"id":60,"type":"single","stem":"染色车间小样工配制染液时发现按配方称好的染料倒入量杯后挂壁较多，正确的处置是什么","options":["用少量水多次冲洗称量容器并并入染液","忽略挂壁因为量少不影响结果","用毛刷刮下挂壁染料后直接丢弃","补加等量染料以弥补挂壁损失"],"answer":[0],"explanation":"知识点：染料转移完全性。挂壁会造成实际用量偏低，应用少量水多次冲洗称量容器并并入染液。B错在挂壁量虽小但对小样色光有影响；C错在刮下后丢弃仍损失染料；D错在补加等量无依据，可能过量。","tier":"挑战"},{"id":61,"type":"multi","stem":"某化验室配制染液时出现染料未完全溶解、液中有颗粒，下列哪些做法有助于解决该问题且不改变配方浓度","options":["适当提高溶解水温并充分搅拌","将染料先用少量冷水调浆再稀释","延长搅拌时间至颗粒完全消失","直接补加大量水稀释后使用","加入与染料电荷相反的助剂促溶"],"answer":[0,1,2],"explanation":"知识点：染料溶解操作。提高水温、先调浆再稀释、延长搅拌均有助于溶解且不改变浓度。D错在补加大量水会改变配方浓度；E错在加入电荷相反助剂可能产生沉淀，反而阻碍溶解。","tier":"进阶"},{"id":62,"type":"single","stem":"配制活性染料染液时，称取染料后先用少量冷水调成浆状，再加入热水溶解，这一步的主要目的是什么","options":["防止染料结块并促进均匀溶解","降低染料水解速率以提高固色率","使染料颗粒吸水膨胀后便于过滤","减少称量误差对浓度的影响"],"answer":[0],"explanation":"知识点是染料溶解操作要点。先用冷水调浆可避免染料颗粒直接遇热水抱团结块，再加热水促溶，故A对。B错在水解速率主要由pH和温度控制，调浆顺序不解决此问题；C错在调浆不改变过滤需求；D错在称量误差发生在称量环节，与调浆无关。","tier":"基础"},{"id":63,"type":"single","stem":"化验室配制染液时需将母液稀释10倍，量取母液应选用下列哪种器皿最合适","options":["10mL刻度吸管","100mL量筒","50mL烧杯","1000mL容量瓶"],"answer":[0],"explanation":"知识点是移液器皿的选择。稀释10倍需准确量取小体积母液，刻度吸管精度最高，故A对。B量筒精度低不适合精确移取；C烧杯无刻度不能准确量取；D容量瓶用于定容而非量取母液。","tier":"进阶"},{"id":64,"type":"single","stem":"染液配制记录中需要填写染化料的批号，填写批号的主要作用是","options":["便于出现色差时追溯原料批次","用于计算染料的力份换算系数","确定染液的使用有效期","核对染料的溶解温度要求"],"answer":[0],"explanation":"知识点是配制记录的可追溯性。批号用于追溯同批原料质量波动，故A对。B力份换算靠检测数据而非批号；C有效期由品种和储存条件决定；D溶解温度由染料类型决定，均与批号无直接关系。","tier":"基础"},{"id":65,"type":"single","stem":"配制分散染料染液时，染料难溶需加分散剂，分散剂加入的合适时机是","options":["染料加水调浆后、升温溶解前加入","染料完全溶解并冷却后加入","染色升温到高温阶段时加入","染液配好后静置过滤时加入"],"answer":[0],"explanation":"知识点是分散染料配制中助剂加入顺序。分散剂应在染料调浆后、升温前加入以帮助颗粒分散稳定，故A对。B错在冷却后加入难以充分混匀分散；C错在高温阶段加入影响分散均匀性；D错在过滤时加入已错过分散时机。","tier":"进阶"},{"id":66,"type":"single","stem":"某化验室用同一台电子天平称量染料，先称取1.000g标准砝码显示1.002g，此时正确的处置是","options":["记录偏差后继续称样并做结果修正","直接按显示值称样不再校准","换用另一台天平但不再校验","把砝码擦干净后重新称一次即可"],"answer":[0],"explanation":"知识点是天平校准与偏差处理。发现示值偏差应记录并评估，必要时校准后再称样或修正，故A对。B错在忽略偏差会影响配方准确；C错在未校验新天平同样不可靠；D错在仅擦拭不能解决示值系统偏差。","tier":"挑战"},{"id":67,"type":"single","stem":"配制酸性染料染液时，染液pH需用酸调节，下列哪种做法符合配制工操作要求","options":["将酸缓慢加入染液中并不断搅拌","将染液快速倒入浓酸中混合","把酸和染液同时倒入空桶混合","先加碱中和再加酸调节到目标值"],"answer":[0],"explanation":"知识点是酸液配制安全操作。酸应缓慢加入并搅拌以防局部过热飞溅，故A对。B错在快速倒入浓酸易剧烈放热喷溅；C错在同时倒入无法控制放热；D错在多加碱再回调造成浪费和盐分增加。","tier":"进阶"},{"id":68,"type":"single","stem":"配方计算中染料力份为150%，原配方用100%力份染料2.0g，换算成该染料的用量应为","options":["1.33g","1.50g","2.67g","3.00g"],"answer":[0],"explanation":"知识点是染料力份换算。用量与力份成反比，2.0×100÷150≈1.33g，故A对。B错在按150÷100×?误算；C错在把比例方向搞反；D错在直接乘1.5未取倒数。","tier":"基础"},{"id":69,"type":"single","stem":"染液配制完成后发现液面有少量未分散的染料浮粒，正确的处理方式是","options":["搅拌后过滤再使用并记录异常","直接倒入染缸以免浪费染液","静置片刻后取上层清液使用","补加少量分散剂后不经过滤使用"],"answer":[0],"explanation":"知识点是染液质量检查与异常处置。浮粒应搅拌过滤后使用并记录，故A对。B错在浮粒入缸造成色点；C错在取清液会使浓度偏低；D错在补加分散剂不能消除已形成的浮粒。","tier":"挑战"},{"id":70,"type":"single","stem":"配制还原染料隐色体染液时，通常需要加入的助剂组合是","options":["还原剂和碱剂","氧化剂和酸剂","分散剂和酸剂","固色剂和碱剂"],"answer":[0],"explanation":"知识点是还原染料隐色体配制。还原染料需在碱性条件下用还原剂还原成隐色体，故A对。B错在氧化剂会阻碍还原；C错在酸剂不利于还原环境；D错在固色剂用于染色后而非配制隐色体。","tier":"基础"},{"id":71,"type":"single","stem":"某批染液按配方配制后测得浓度偏低，复核发现称量时天平未调水平，这属于配制过程中的哪个环节出错","options":["称量环节","溶解环节","定容环节","过滤环节"],"answer":[0],"explanation":"知识点是配制流程各环节与误差来源。天平未调水平导致称量不准，属称量环节，故A对。B溶解环节影响是否完全溶解；C定容影响体积准确；D过滤影响杂质去除，均非本例原因。","tier":"挑战"},{"id":72,"type":"single","stem":"化验室配制染液时，母液储存瓶标签上应至少标明的内容是","options":["染料名称、浓度、配制日期","染料名称、溶解温度、pH值","染料批号、力份、供应商","染料名称、用量、染色温度"],"answer":[0],"explanation":"知识点是染液标签管理。母液标签核心是名称、浓度和配制日期以便使用追溯，故A对。B溶解温度与pH是工艺参数不是标签必备；C供应商与力份属原料信息；D用量和染色温度非母液标签内容。","tier":"基础"},{"id":73,"type":"multi","stem":"配制染液时下列哪些做法有助于减少称量误差对配方准确性的影响","options":["称量前校准天平并调水平","称量时关闭防风罩门","先称大组分再称小组分","称量纸随染料一起计入重量","称量后立即记录数据"],"answer":[0,1,4],"explanation":"知识点是称量操作规范。校准调平、关闭防风罩、及时记录均可减小误差，故A、B、E对。C错在先称大组分再称小组分不会减小误差反而可能因残留影响小组分；D错在称量纸重量应去皮扣除，不能计入染料重量。","tier":"进阶"},{"id":74,"type":"single","stem":"配制活性染料染液时，称取染料后需要先用少量温水调成糊状再稀释，这一操作的主要目的是","options":["防止染料结块并便于均匀分散","提高染料与纤维的反应速率","降低染料在染液中的溶解度","减少元明粉对染料的盐析作用"],"answer":[0],"explanation":"知识点：染料溶解操作。染料粉体直接倒入大量水中易抱团形成难溶颗粒，先调糊再稀释可保证分散均匀。B错在调糊属物理分散，不改变反应速率；C错在调糊是促溶而非降溶解度；D错在盐析由电解质引起，与调糊无关。","tier":"进阶"},{"id":75,"type":"single","stem":"化验室配制染液时，用电子天平称取2.000 g染料，天平显示2.003 g，正确的处置是","options":["直接记录2.000 g继续配制","用药匙减量至显示2.000 g","重新调零后再称一次","把染料倒回原瓶重新称量"],"answer":[1],"explanation":"知识点：称量准确性与允差控制。染料称量直接影响配方浓度，超差应在允许范围内微调至目标值。A错在记录值与实际不符会引入系统误差；C错在重新调零不改变已称物料的实际质量；D错在反复倒回易吸潮污染且不解决超差。","tier":"进阶"},{"id":76,"type":"single","stem":"配制酸性染料染浴时，处方要求加入硫酸铵，其主要作用是","options":["作为缓染剂降低上染速率","作为酸剂在升温中逐步释酸","作为匀染剂改善泳移性","作为固色剂提高湿牢度"],"answer":[1],"explanation":"知识点：酸剂的种类与作用。硫酸铵是释酸剂，升温时水解逐步释放酸，使pH缓慢下降，上染平稳。A错在缓染靠匀染剂而非释酸剂；C错在匀染剂是表面活性剂类；D错在固色多在染色后处理，硫酸铵不固色。","tier":"基础"},{"id":77,"type":"single","stem":"某化验室需配制质量分数为2%的染料母液100 g，称取染料后应加入的水量约为","options":["96 g","98 g","100 g","102 g"],"answer":[1],"explanation":"知识点：质量分数配制计算。2%母液指染料2 g、总质量100 g，故水为100-2=98 g。A错在把水量按4%算；C错在把水当成总量未扣除染料；D错在超出总量。","tier":"基础"},{"id":78,"type":"single","stem":"配制还原染料悬浮体染液时，研磨后染液需经胶体磨或砂磨处理，其目的是","options":["使染料颗粒细化到便于均匀上染","使染料发生还原反应生成隐色体","使染料与保险粉充分混合","使染料溶解成真溶液"],"answer":[0],"explanation":"知识点：还原染料悬浮体染色。悬浮体染色要求染料以微粒均匀附着纤维，研磨细化保证分散与匀染。B错在还原成隐色体是后续保险粉碱液工序；C错在研磨阶段尚未加保险粉；D错在还原染料悬浮体不是真溶液。","tier":"进阶"},{"id":79,"type":"single","stem":"用移液管吸取染液时，正确的操作是","options":["用嘴吸使液面上升至刻度","用洗耳球吸液至刻度上方再放至刻度","把移液管插入容器底部吸液","吸液后吹出残留在管尖的液体"],"answer":[1],"explanation":"知识点：移液管标准操作。应借助洗耳球吸液，先超刻度再缓放至刻度，保证体积准确。A错在用嘴吸有安全和污染风险且不规范；C错在插底会吸入沉淀；D错在自由流出的移液管管尖残留液不应吹出。","tier":"基础"},{"id":80,"type":"single","stem":"配制好的染液在放置一段时间后出现少量沉淀，正确的处置是","options":["搅匀后直接用于染色","过滤后重新标定浓度再用","加热使沉淀重新溶解后使用","补加分散剂后继续使用"],"answer":[1],"explanation":"知识点：染液质量异常处置。出现沉淀说明溶解或分散不良，应过滤并重新标定浓度以保证配方准确。A错在搅匀不能消除沉淀且上染不匀；C错在加热可能使染料分解或凝聚加重；D错在补加助剂不解决已析出的染料。","tier":"进阶"},{"id":81,"type":"single","stem":"某操作工配制活性染料染液时先加元明粉后加纯碱，结果染液出现浑浊，最可能的原因是","options":["元明粉用量不足导致染料析出","纯碱加入过快使局部碱度过高","元明粉先加入使染料发生盐析","水温过低使染料无法溶解"],"answer":[2],"explanation":"知识点：电解质对染料溶解的影响。元明粉是电解质，先加入高浓度染料液中会降低染料溶解度产生盐析浑浊。A错在用量不足不会析出；B错在纯碱过快主要影响pH均匀性；D错在题干未提低温，且盐析更直接。","tier":"进阶"},{"id":82,"type":"single","stem":"配制分散染料染液时，染料需在50℃左右化料，温度不宜过高的原因是","options":["高温会使分散剂失效","高温会使染料颗粒重新凝聚","高温会使染料发生还原分解","高温会使染液pH急剧下降"],"answer":[1],"explanation":"知识点：分散染料化料温度控制。分散染料靠分散剂悬浮，温度过高会破坏吸附层导致颗粒凝聚。A错在分散剂失效温度远高于此；C错在还原分解需还原剂和高温；D错在温度对pH影响不显著。","tier":"进阶"},{"id":83,"type":"single","stem":"化验室配制染液用水要求为软水，若用硬水配制活性染料染液，最可能造成的影响是","options":["染料与钙镁离子结合产生沉淀","染液pH自动升高","染料上染率明显提高","元明粉用量需减少"],"answer":[0],"explanation":"知识点：水质对染液的影响。硬水中钙镁离子会与染料阴离子结合生成不溶性色淀。B错在硬水一般偏碱但不显著升高；C错在上染率下降而非提高；D错在元明粉用量与水质硬度无直接对应关系。","tier":"进阶"},{"id":84,"type":"single","stem":"某化验室接到处方：染料1.5 g/L、元明粉30 g/L、纯碱15 g/L，配制500 mL染液，需称取纯碱的质量为","options":["7.5 g","15 g","3.0 g","30 g"],"answer":[0],"explanation":"知识点：染液配制浓度换算。15 g/L×0.5 L=7.5 g。B错在把每升用量当总量；C错在误按0.2 L计算；D错在把元明粉用量当成纯碱量。","tier":"基础"},{"id":85,"type":"single","stem":"活性染料化料时，用于溶解染料的温水温度一般控制在多少较为适宜","options":["20～30℃","40～60℃","70～85℃","90～100℃"],"answer":[1],"explanation":"知识点：活性染料化料水温。40～60℃能使染料充分润湿溶解且不致引起染料水解加剧，故正确。20～30℃溶解慢易结块；70～85℃部分活性染料开始明显水解；90～100℃会大量水解并可能烫伤染料色光。","tier":"基础"},{"id":86,"type":"single","stem":"配制染液时称取染料应使用下列哪种器具最为合适","options":["台秤配称量纸","分析天平配称量纸","电子天平配称量纸","磅秤配塑料盆"],"answer":[2],"explanation":"知识点：染化料称量精度。电子天平精度高、读数稳定，适合化验室小样称量，故正确。台秤和磅秤精度低，误差大；分析天平虽精度高但称量范围小、操作繁琐，常规化料不经济。","tier":"基础"},{"id":87,"type":"single","stem":"配制染液时发现染料未能完全溶解、液面有细小颗粒悬浮，正确的下一步操作是","options":["直接加入染缸使用","补加冷水继续搅拌","过滤后再补加温水搅拌溶解","加热至沸腾继续搅拌"],"answer":[2],"explanation":"知识点：染液配制操作。未溶颗粒会造成色点、色花，应先过滤除去颗粒再加温水搅拌促溶，故正确。直接使用会把颗粒带入染缸；补加冷水更难溶；直接煮沸对部分染料会促水解或变色。","tier":"挑战"},{"id":88,"type":"single","stem":"化验室打小样时，母液配制常采用 1:100 的浓度，若需在 200 mL 染液中加入 2%（owf）的染料，织物重 5 g，应吸取母液多少毫升","options":["5 mL","10 mL","20 mL","40 mL"],"answer":[1],"explanation":"知识点：母液吸取量计算。染料用量=5 g×2%=0.1 g；母液浓度 1:100 即 1 g/100 mL=0.01 g/mL；需吸取 0.1÷0.01=10 mL，故正确。5 mL 少一半；20 mL 多一倍；40 mL 多三倍。","tier":"进阶"},{"id":89,"type":"single","stem":"配制酸性染料染液时，若需加入匀染剂，通常应在什么阶段加入","options":["染料溶解完全后加入并搅匀","与染料同时加入冷水中","染色升温至沸后加入","染色完毕后再加入"],"answer":[0],"explanation":"知识点：助剂加入顺序。匀染剂应在染料溶解完全后加入并搅拌均匀，保证混合均匀，故正确。与染料同时加入可能影响染料溶解；沸后加入来不及发挥作用；染毕加入无意义。","tier":"基础"},{"id":90,"type":"single","stem":"化验室配制染液时，用于润湿难溶染料的助溶剂通常选用下列哪种","options":["元明粉","尿素","食盐","纯碱"],"answer":[1],"explanation":"知识点：助溶剂选择。尿素对染料有增溶和润湿作用，常作助溶剂，故正确。元明粉、食盐是促染剂，起盐析作用；纯碱是碱剂，用于调节 pH，均无助溶作用。","tier":"基础"},{"id":91,"type":"single","stem":"染液配制记录中，需要记录的关键参数不包括下列哪一项","options":["染料名称与批号","称量日期与操作人","染液配制后的 pH 值","染色车间当班产量"],"answer":[3],"explanation":"知识点：配制记录内容。记录应包含染料信息、称量信息、配制参数如 pH 等，故前三项都要记录。车间当班产量属于生产统计，与染液配制记录无关，故为应选答案。","tier":"基础"},{"id":92,"type":"single","stem":"染色车间操作工将配制好的染液放置过夜后次日直接使用，发现色光偏暗，正确的处置是","options":["直接补加染料后使用","重新测定浓度并调整后使用","加热至沸后继续使用","加入匀染剂后继续使用"],"answer":[1],"explanation":"知识点：染液放置后的处置。放置过夜可能发生水解、沉降或浓度变化，应重新测定浓度并调整，故正确。直接补加染料无依据；加热至沸可能加剧水解；加匀染剂不能解决浓度与色光问题。","tier":"挑战"},{"id":93,"type":"multi","stem":"关于染化料称量与配制操作，下列做法正确的有","options":["称量前校准电子天平并去皮","不同染料共用同一称量纸称量","称量完毕及时记录并密封保存染料","配制母液时按先加染料后加水的顺序","染液配制后测定 pH 并记录"],"answer":[0,2,4],"explanation":"知识点：称量与配制规范。称量前校准去皮、称后记录密封、配制后测 pH 记录均为正确操作，故 A、C、E 正确。不同染料共用称量纸会造成交叉污染，B 错；先加染料后加水易结块，D 错。","tier":"进阶"},{"id":94,"type":"single","stem":"化验室配制活性染料染液时，称取染料后用于溶解染料的用水温度一般应控制在","options":["室温冷水直接溶解","40~50℃温水搅拌溶解","90℃以上沸水快速溶解","先加冰水再逐渐升温"],"answer":[1],"explanation":"知识点：活性染料溶解温度。正确项40~50℃温水既能充分溶解又避免染料水解。冷水溶解慢易结块；沸水会使活性基团水解降低固色率；加冰水再升温会造成染料先结块后难溶。","tier":"进阶"},{"id":95,"type":"single","stem":"配制染液时发现称量纸上的染料有少量残留未倒入烧杯，正确的处理是","options":["用少量配制用水冲洗称量纸一并倒入","忽略残留按理论量继续配制","用干毛刷把残留扫到地面","把残留倒回染料原瓶避免浪费"],"answer":[0],"explanation":"知识点：定量转移操作。正确项用少量水冲洗称量纸可保证实际用量与配方一致。忽略残留会使实际浓度偏低；扫到地面损失染料且污染；倒回原瓶可能带入杂质污染整瓶染料。","tier":"挑战"},{"id":96,"type":"single","stem":"配制好的染液在使用前需要测定浓度，化验室常用哪种方法核对母液浓度是否符合配方要求","options":["用pH试纸蘸取母液比色","用分光光度计测吸光度对照标准曲线","用密度计测母液密度换算浓度","用玻璃棒蘸取观察挂丝情况"],"answer":[1],"explanation":"知识点：染液浓度测定。正确项分光光度计测吸光度对照标准曲线是化验室标准定量方法。pH试纸测酸碱度不是浓度；密度计受染料种类和助剂影响不能准确换算；观察挂丝只能粗略判断黏稠度。","tier":"进阶"},{"id":97,"type":"single","stem":"某活性染料配方要求染料用量为织物重的2%（owf），现称取5kg织物，理论需称取染料多少克","options":["10g","50g","100g","200g"],"answer":[2],"explanation":"知识点：owf用量计算。2%owf即染料质量为织物质量的2%，5000g×2%=100g。10g误按0.2%计算；50g误按1%计算；200g误按4%计算。","tier":"基础"},{"id":98,"type":"single","stem":"配制染液时需加入元明粉作促染剂，称量元明粉后发现其结块严重，正确的做法是","options":["直接投入染液搅拌使其自然溶解","研细后再称量并充分搅拌溶解","加热到200℃使其熔化后加入","改用等量食盐但不调整用量"],"answer":[1],"explanation":"知识点：助剂溶解操作。正确项研细后称量可保证溶解均匀和用量准确。直接投入结块难溶会造成局部浓度过高；200℃熔化会改变元明粉性质并危险；食盐与元明粉促染效果不同，等量替换不准确。","tier":"挑战"},{"id":99,"type":"single","stem":"小样染色后发现颜色比标样偏浅，经查配方中染料用量无误、称量准确，下一步应优先检查的环节是","options":["染液配制时是否按规程溶解并定容","染料原瓶是否临近保质期","染色浴比是否与配方一致","称量天平是否在校准有效期内"],"answer":[0],"explanation":"情境案例：颜色偏浅排查。称量已确认无误，优先查染液配制环节是否溶解完全、定容准确，因为溶解不彻底会使实际上染量偏低。保质期影响较小且非首要；浴比和天平校准在此题已排除为前提。","tier":"挑战"},{"id":100,"type":"multi","stem":"化验室配制染液时，下列操作中符合规范要求的有","options":["称量前校准天平并清零","染料溶解后用容量瓶定容至刻度","不同染料共用同一根玻璃棒不冲洗","配好的染液标注名称、浓度和配制日期","称量时先放砝码再缓慢加染料至平衡"],"answer":[0,1,3],"explanation":"知识点：染液配制规范。正确项：称量前校准清零保证准确；容量瓶定容保证浓度准确；标注信息便于追溯。共用玻璃棒不冲洗会造成交叉污染；先放砝码再加染料是称量顺序错误，应先用容器去皮再称量。","tier":"挑战"},{"id":101,"type":"single","stem":"配制活性染料染液时，称取染料前发现天平水平泡偏移，正确的第一步处置是","options":["调节天平地脚螺丝使水平泡居中后再称量","直接在当前状态下称量并记录偏差值","把天平搬到另一张桌子上重新开机称量","先用标准砝码称一次看读数再决定是否调平"],"answer":[0],"explanation":"知识点：天平使用前必须调平。水平泡偏移说明天平未处于水平状态，称量结果会有系统偏差，应先调节地脚螺丝使气泡居中再称量。直接称量并记录偏差不会消除系统误差；搬动天平后仍需重新调平且可能引入新误差；先用砝码试称只能发现偏差存在，不能替代调平这一必要步骤。","tier":"挑战"},{"id":102,"type":"single","stem":"化验室配制染液时，量取浓硫酸与水的混合操作，正确的顺序是","options":["将浓硫酸沿器壁缓慢加入水中并不断搅拌","将水沿器壁缓慢加入浓硫酸中并不断搅拌","将浓硫酸与水同时倒入烧杯中再搅拌","先将浓硫酸加热到40℃再倒入冷水中"],"answer":[0],"explanation":"知识点：浓硫酸稀释的放热安全操作。浓硫酸密度大于水且稀释放热剧烈，必须把酸缓慢加入水中并搅拌散热。把水加入浓硫酸会因局部剧烈放热使酸液飞溅；同时倒入无法控制放热速率；加热浓硫酸再倒入冷水会加剧放热和飞溅风险。","tier":"进阶"},{"id":103,"type":"single","stem":"配制还原染料悬浮体染液时，染料的研磨细度对染色效果的主要影响是","options":["颗粒过粗会造成色点、色花和上染不匀","颗粒过粗会提高染料的亲和力使上染加快","颗粒过粗会降低染液的pH值影响还原","颗粒过粗会增加染料的溶解度便于渗透"],"answer":[0],"explanation":"知识点：还原染料悬浮体染色要求染料颗粒足够细。颗粒粗时悬浮体分散不均，易在织物上形成色点和色花。颗粒粗细不改变染料对纤维的亲和力；研磨细度与染液pH无直接关系；颗粒越粗溶解度越低而非增加。","tier":"进阶"},{"id":104,"type":"single","stem":"用移液管量取染液时，放液后管尖残留的少量液体，正确的处理是","options":["管尖残留液不可吹出，应让管内自然流尽后移开","用洗耳球把管尖残留液吹入接收容器","把移液管插入液面下再放液以减少残留","放液时倾斜移液管使残留液沿管壁流下"],"answer":[0],"explanation":"知识点：移液管的正确使用。标准移液管标定容量已包含自然流尽后的残留量，吹出残液会使实际体积偏大。用洗耳球吹出、插入液面下放液、倾斜使残液流下都会改变标定体积，导致量取不准。","tier":"进阶"},{"id":105,"type":"single","stem":"配制分散染料染液时，分散剂加入量不足，最可能出现的问题是","options":["染料颗粒重新凝聚形成色点或染斑","染液pH值升高影响上染率","染料溶解度增大造成得色过深","染液黏度下降导致匀染性变好"],"answer":[0],"explanation":"知识点：分散剂对分散染料稳定性的作用。分散剂不足时染料颗粒易凝聚，造成色点和染斑。分散剂主要起分散稳定作用，不是调pH的主要手段；它不增加染料溶解度；黏度下降与匀染性变好均不符合实际。","tier":"基础"},{"id":106,"type":"single","stem":"车间配制染液时发现配方中染料用量以owf表示，织物重200kg，染料用量2%（owf），应称取染料","options":["4kg","2kg","0.4kg","40kg"],"answer":[0],"explanation":"知识点：owf（对织物重）配方的计算。染料用量=织物重×百分比=200kg×2%=4kg。2kg是按1%计算的结果；0.4kg是按0.2%计算；40kg是按20%计算，均对应错误。","tier":"挑战"},{"id":107,"type":"single","stem":"配制染液时需将配方中染料用量由1:10的浴比折算到1:8浴比，若原配方染料用量为织物重的3%，保持染液浓度不变，新染料用量应","options":["仍为织物重的3%","改为织物重的3.75%","改为织物重的2.4%","改为织物重的4%"],"answer":[0],"explanation":"知识点：owf用量的含义。owf以织物重为基准，与浴比无关，改变浴比只改变助剂浓度和染液总量，不改变对织物重的染料百分比。3.75%是把浴比反比算错；2.4%是把浴比正比算错；4%是凭感觉取整，均无依据。","tier":"进阶"},{"id":108,"type":"single","stem":"称取1.5g染料时，化验室常用精度为0.01g的天平，若误用精度为0.1g的台秤称量，主要后果是","options":["称量绝对误差增大，染色重现性变差","称量结果偏大，染料用量减少","称量结果偏小，染料用量增加","天平精度不影响结果，只影响称量速度"],"answer":[0],"explanation":"知识点：称量器具精度对配方准确性的影响。0.1g精度无法准确称到0.01g级，绝对误差大，批次间重现性差。精度不足不一定固定偏大或偏小；称量精度直接影响结果，不是只影响速度。","tier":"进阶"},{"id":109,"type":"single","stem":"配制酸性染料染液时，配方要求用醋酸调节pH至4~5，操作工把醋酸误加为纯碱，最可能的后果是","options":["染液pH升高，上染率下降且色光偏浅","染液pH降低，上染率升高且色光偏深","染液pH不变，仅影响染液黏度","染液pH升高，但染料溶解度增大得色更深"],"answer":[0],"explanation":"知识点：酸性染料染色需在酸性条件下上染。纯碱使pH升高，酸性染料上染率下降、色光偏浅。纯碱不会降低pH；pH不会不变；pH升高不会使酸性染料得色更深。","tier":"进阶"},{"id":110,"type":"single","stem":"某化验室配制染液时，将已称好的染料倒入量筒中直接加水定容，再倒入染杯，这种操作的主要问题是","options":["染料在量筒中溶解不完全且定容体积不准","量筒不能用于染液配制属于违规操作","染料会与量筒玻璃发生化学反应","定容后染液温度会明显升高"],"answer":[0],"explanation":"知识点：染液配制应在烧杯中先溶解再定容。直接在量筒中加染料定容易溶解不完全，且染料占体积使定容不准。量筒可用于量取，问题在操作方式；玻璃一般不与常用染料反应；加水定容不会明显升温。","tier":"进阶"},{"id":111,"type":"multi","stem":"某化验室接到一份新配方，要求配制活性染料染液，下列操作中正确的有","options":["称量前先校准天平水平并预热","染料先用少量温水调成糊状再稀释","染液配好后立即记录配制时间和批号","为加快溶解把染料直接倒入沸水中搅拌","配制完成后把剩余染液倒回原染料桶"],"answer":[0,1,2],"explanation":"知识点：染液配制规范操作。称量前调平预热保证称量准确；先调糊再稀释可避免结块；记录时间和批号便于追溯。直接倒入沸水易使染料结块并影响活性染料性能；剩余染液倒回原桶会污染原料，均属错误操作。","tier":"挑战"},{"id":112,"type":"single","stem":"化验室配制活性染料染液时，称取染料前对天平进行校准操作的直接目的是","options":["消除称量器具的系统误差","提高染料在染液中的溶解速度","防止染料粉尘飞扬污染环境","延长天平传感器的使用寿命"],"answer":[0],"explanation":"知识点是称量前校准天平的意义。校准使天平读数与真实质量一致，消除器具本身的系统误差，故A正确；溶解速度由搅拌、温度、化料方式决定，与校准无关，B错；防粉尘靠通风柜和密闭操作，C错；校准不改变传感器寿命，D错。","tier":"进阶"},{"id":113,"type":"single","stem":"配制酸性染料染液时，将染料先用少量冷水调成糊状再加热水溶解，这一操作的主要作用是","options":["防止染料结块并促进均匀溶解","降低染料的亲和力避免上染过快","提高染液的pH值以利于发色","减少染料用量从而节约成本"],"answer":[0],"explanation":"知识点是染料化料操作。先用冷水调糊可润湿染料颗粒、避免直接遇热水抱团结块，再加热水促溶，故A正确；调糊不改变亲和力，B错；调糊与pH调节无关，C错；化料方式不减少染料用量，D错。","tier":"基础"},{"id":114,"type":"single","stem":"某化验室配制染液时用移液管量取母液，正确的读数做法是","options":["视线与弯月面最低点保持水平","视线俯视使读数偏低更保险","视线仰视使读数偏高便于观察","以移液管外壁液面位置为准"],"answer":[0],"explanation":"知识点是容量器皿读数。移液管读数应以弯月面最低点与视线水平为准，故A正确；俯视或仰视都会引入视角误差，B、C错；外壁挂液不是管内液面，不能作读数依据，D错。","tier":"基础"},{"id":115,"type":"single","stem":"配制染液时需将浓硫酸缓慢加入水中，下列操作顺序正确的是","options":["将水缓慢倒入浓硫酸中并搅拌","将浓硫酸缓慢加入水中并搅拌","将浓硫酸与水同时倒入容器","先将浓硫酸加热再倒入冷水"],"answer":[1],"explanation":"知识点是浓硫酸稀释的安全操作。酸入水并搅拌可使热量及时散失，故B正确；水入酸会因局部剧烈放热使酸液飞溅，A错；同时倒入无法控制放热，C错；加热浓硫酸再入冷水会加剧暴沸飞溅，D错。","tier":"基础"},{"id":116,"type":"single","stem":"配制好的染液在存放过程中出现少量沉淀，使用前最合理的处置方式是","options":["充分搅拌后直接使用","过滤后按浓度重新标定使用","加热至沸腾使沉淀重新溶解","静置取上层清液直接使用"],"answer":[1],"explanation":"知识点是染液异常处置。出现沉淀说明染料或助剂可能析出、变质，应过滤并重新标定浓度后再用，故B正确；搅拌不能消除沉淀且可能带入不溶物，A错；加热沸腾可能使染料分解或色光变化，C错；直接取清液会使实际浓度偏低，D错。","tier":"进阶"},{"id":117,"type":"single","stem":"化验室用分析天平称取染料时，下列做法能有效减小称量误差的是","options":["称量前后都用同一砝码校准","称量时频繁开关天平门取放物品","将染料直接倒在称量盘上称量","称量时用手直接接触被称物"],"answer":[0],"explanation":"知识点是分析天平称量误差控制。称量前后校准可确认天平状态，减小系统误差，故A正确；频繁开关天平门会引起气流扰动和读数不稳，B错；染料直接接触称量盘会腐蚀器具并造成残留误差，C错；手接触被称物会带入汗渍和温度影响，D错。","tier":"基础"},{"id":118,"type":"single","stem":"某染液配方要求染料用量为织物重量的2%（owf），现称取5.0 g织物进行小样试验，理论上应称取染料","options":["0.05 g","0.10 g","0.20 g","0.50 g"],"answer":[1],"explanation":"知识点是owf用量计算。2% owf即染料质量为织物质量的2%，5.0 g×2%=0.10 g，故B正确；0.05 g相当于1% owf，A错；0.20 g相当于4% owf，C错；0.50 g相当于10% owf，D错。","tier":"基础"},{"id":119,"type":"single","stem":"配制染液时发现母液实际浓度高于标签标示浓度，按原配方直接量取会导致","options":["染液实际浓度偏高、色泽偏深","染液实际浓度偏低、色泽偏浅","染液pH明显升高","染料上染速率明显下降"],"answer":[0],"explanation":"知识点是母液浓度偏差对染液的影响。母液偏浓时按原体积量取，带入的染料量偏多，染液浓度偏高、色泽偏深，故A正确；B与实际情况相反，错；母液浓度偏高不直接导致pH升高，C错；上染速率受浓度、温度、助剂等多因素影响，不能简单判定下降，D错。","tier":"挑战"},{"id":120,"type":"single","stem":"化验室配制染液时，用于调节染浴pH的醋酸-醋酸钠体系属于","options":["氧化还原缓冲体系","酸碱缓冲体系","螯合稳定体系","表面活性体系"],"answer":[1],"explanation":"知识点是染浴pH调节原理。醋酸与醋酸钠构成弱酸及其盐的酸碱缓冲体系，能稳定染浴pH，故B正确；该体系不涉及电子转移，不是氧化还原体系，A错；不通过配位螯合起稳定作用，C错；不改变表面活性，D错。","tier":"基础"},{"id":121,"type":"single","stem":"某化验室配制分散染料染液时，染料在低温下难以分散均匀，下列处理方式最合适的是","options":["直接提高染液温度并充分搅拌","加入大量电解质促进染料沉降","延长静置时间让染料自然分散","用冷水反复稀释直至无颗粒"],"answer":[0],"explanation":"知识点是分散染料化料。适当升温并搅拌有助于分散剂发挥作用、使染料均匀分散，故A正确；电解质可能促使分散体凝聚沉降，B错；静置不能解决分散不良，C错；冷水稀释会降低分散效果，D错。","tier":"进阶"},{"id":122,"type":"single","stem":"染色车间操作工发现配制好的染液放置后颜色明显变浅，排查时首先应检查的环节是","options":["染液是否发生染料沉降或分解","染色机滚筒转速是否偏低","织物进缸前的含水率是否偏高","车间照明光源是否发生改变"],"answer":[0],"explanation":"知识点是染液异常的排查思路。染液放置后变浅多与染料沉降、聚集或分解有关，应优先检查染液本身，故A正确；滚筒转速影响上染均匀性而非染液颜色，B错；织物含水率影响带液量而非染液颜色，C错；照明变化影响目视判断但不改变染液本身，D错。","tier":"挑战"},{"id":123,"type":"multi","stem":"化验室配制染液时，为保证称量和配液结果准确，下列做法正确的有","options":["称量前检查天平水平并校准","染液配制记录中写明染料批号和实际称量值","量取母液时每次都用同一支移液管且不润洗","配好的染液标注配制日期和浓度后存放","称量时把染料撒落后直接补加至目标读数"],"answer":[0,1,3],"explanation":"知识点是染液配制的规范性操作。检查校准天平保证称量准确，A正确；记录批号和实际称量值便于追溯与复现，B正确；标注日期和浓度便于管理，D正确；移液管不润洗会因挂壁残留使量取体积偏小，C错；撒落后补加无法保证实际称量值准确，E错。","tier":"挑战"},{"id":124,"type":"single","stem":"化验室配制染液时，用托盘天平称取 2.5 g 染料，下列读数记录方式符合称量精度要求的是哪一项？","options":["2.5 g","2.50 g","2.500 g","2.5000 g"],"answer":[1],"explanation":"知识点：称量精度与有效数字。托盘天平感量通常为 0.01 g，读数应记录到小数点后两位即 2.50 g。2.5 g 精度不够；2.500 g 和 2.5000 g 超出该天平的分度值，属于虚假精度。","tier":"基础"},{"id":125,"type":"single","stem":"用移液管量取染液时，正确的操作是下列哪一项？","options":["用嘴吸取染液至刻度以上再放液","用洗耳球吸取至刻度以上再放至刻度","用洗耳球吸取至刻度以下再补加染液","将移液管插入液面以下后直接倒出染液"],"answer":[1],"explanation":"知识点：移液管操作规范。正确做法是用洗耳球吸取液面略高于刻度，再缓慢放液至刻度线。用嘴吸违反安全操作；吸至刻度以下再补加会引入误差且无法准确定容；直接倒出无法定量。","tier":"基础"},{"id":126,"type":"single","stem":"配制分散染料染液时，染料需经研磨或砂磨处理，这主要是为了解决分散染料的什么问题？","options":["水溶性差、易聚集沉淀","对碱剂敏感、易水解","升华牢度低、易泳移","对纤维亲和力过高、上染过快"],"answer":[0],"explanation":"知识点：分散染料的应用特性。分散染料水溶性极低，以微粒分散于染浴中，研磨可减小粒径、防止聚集沉淀。水解是活性染料的问题；升华牢度是成品性能；亲和力过高不是研磨要解决的问题。","tier":"进阶"},{"id":127,"type":"single","stem":"配制酸性染料染液时，通常用热水溶解染料，若直接用沸水溶解某些酸性染料可能导致什么后果？","options":["染料发生还原分解而褪色","染料凝聚成焦油状粘块","染液 pH 值急剧升高","染料与水中钙镁离子生成沉淀"],"answer":[1],"explanation":"知识点：酸性染料溶解操作。部分酸性染料遇沸水或直接投料易凝聚成焦油状粘块，应先用温水调糊再稀释。还原分解多见于还原染料；pH 升高是加碱的结果；钙镁沉淀是硬水问题，与水温无直接关系。","tier":"进阶"},{"id":128,"type":"single","stem":"某化验室配制染液时发现染料溶解后液面有少量不溶浮渣，正确的处理方式是下列哪一项？","options":["直接倒入染杯使用，浮渣不影响上染","用滤纸过滤后再使用染液","加碱后加热使浮渣溶解","静置后取上层清液使用"],"answer":[1],"explanation":"知识点：染液配制质量控制。不溶浮渣会影响上染均匀性和得色量，应过滤除去。直接使用会造成色点色斑；加碱可能改变染浴条件甚至使染料水解；静置取上层无法去除悬浮细渣，仍会带入染杯。","tier":"挑战"},{"id":129,"type":"single","stem":"配制还原染料隐色体染液时，加入保险粉和烧碱的顺序及作用，下列描述正确的是哪一项？","options":["先加保险粉再加烧碱，保险粉起还原作用","先加烧碱再加保险粉，烧碱提供碱性介质","保险粉与烧碱同时加入，二者作用相同","先加保险粉再加烧碱，烧碱起还原作用"],"answer":[1],"explanation":"知识点：还原染料隐色体配制。应先在碱性介质中加烧碱，再加保险粉进行还原，烧碱提供碱性环境防止隐色体过早氧化。保险粉是还原剂而非碱剂；二者作用不同；先加保险粉在无碱条件下还原不充分且易分解。","tier":"进阶"},{"id":130,"type":"single","stem":"化验室用电子天平称取染料时，下列做法中会影响称量准确度的是哪一项？","options":["称量前先开机预热并校准","称量纸随容器一起去皮","用手直接拿取被称染料","称量时关闭天平防风罩"],"answer":[2],"explanation":"知识点：称量操作规范。手上有汗渍和油脂，直接拿取染料会改变样品质量并污染天平。预热校准、去皮、关闭防风罩均为正确操作，不影响准确度。","tier":"挑战"},{"id":131,"type":"single","stem":"某车间配制染液时，处方要求加元明粉 20 g/L，配 500 L 染液，应称取元明粉多少？","options":["5 kg","10 kg","20 kg","40 kg"],"answer":[1],"explanation":"知识点：染液配方计算。20 g/L × 500 L = 10000 g = 10 kg。5 kg 是按 250 L 算的；20 kg 是把 g/L 当成 kg/L 算的；40 kg 是按 1000 L 算的。","tier":"挑战"},{"id":132,"type":"single","stem":"某化验室在配制染液时，发现处方中染料用量以 o.w.f 表示，被染物质量为 200 g，染料用量为 2%，应称取染料多少？","options":["0.4 g","2 g","4 g","40 g"],"answer":[2],"explanation":"知识点：o.w.f 用量计算。o.w.f 指对织物重量的百分比，200 g × 2% = 4 g。0.4 g 是按 0.2% 算的；2 g 是按 1% 算的；40 g 是按 20% 算的。","tier":"挑战"},{"id":133,"type":"single","stem":"化验室配制染液时，将浓染液稀释为工作液，若取 10 mL 浓染液定容至 100 mL，该稀释倍数是多少？","options":["5 倍","10 倍","20 倍","100 倍"],"answer":[1],"explanation":"知识点：稀释倍数计算。稀释倍数=稀释后体积/取用浓液体积=100/10=10 倍。5 倍、20 倍、100 倍均不符合定容体积与取液体积的比值关系。","tier":"进阶"},{"id":134,"type":"single","stem":"配制活性染料染液时，称取染料后先用少量冷水调成糊状，再加入规定温度的水进行稀释，这一步操作的主要目的是什么","options":["防止染料结块并便于均匀溶解","提高染料的直接性以增加上染率","降低染液的表面张力以利渗透","加快染料与纤维的化学键合速度"],"answer":[0],"explanation":"知识点是活性染料溶解操作。先用冷水调糊可避免染料颗粒直接遇热水抱团结块，再稀释才能溶解均匀，故正确项对。提高直接性主要靠电解质和温度控制，不是调糊的目的；降低表面张力需加渗透剂；化学键合发生在固色阶段而非溶解阶段，故其余项均错。","tier":"基础"},{"id":135,"type":"single","stem":"化验室配制染液时需将母液稀释10倍，若母液浓度为20 g/L，要配制500 mL稀释液，应量取母液多少毫升","options":["25 mL","50 mL","100 mL","200 mL"],"answer":[1],"explanation":"知识点是溶液稀释计算C1V1=C2V2，稀释10倍即取母液体积为终体积的1/10，500 mL取50 mL。25 mL相当于稀释20倍；100 mL相当于稀释5倍；200 mL相当于稀释2.5倍，均为常见倍数混淆错误。","tier":"进阶"},{"id":136,"type":"single","stem":"配制酸性染料染液时，染料溶解后常需用纱网或滤布过滤后再使用，这一操作最主要的作用是什么","options":["去除未溶解的染料颗粒以防色点色斑","提高染液温度以促进上染","降低染液黏度以利循环","调节染液pH至酸性范围"],"answer":[0],"explanation":"知识点是染液过滤目的。过滤是去除未溶解颗粒和杂质，防止染色时产生色点色斑，故正确项对。过滤不改变温度；黏度主要由浓度和助剂决定；pH靠加酸调节，均与过滤无关。","tier":"基础"},{"id":137,"type":"single","stem":"用托盘天平称量染料时，下列做法中正确的是","options":["称量前先调零并检查天平水平","把染料直接倒在秤盘上称量","称量时用手直接抓取染料","称完后立即用湿抹布擦拭秤盘"],"answer":[0],"explanation":"知识点是称量操作规范。称量前调零、检查水平是保证准确度的基本步骤，故正确项对。染料直接倒秤盘会腐蚀污染且难清理；用手抓取会污染染料和皮肤；湿抹布擦拭会残留水分腐蚀秤盘，均应避免。","tier":"挑战"},{"id":138,"type":"single","stem":"某化验室配制好的染液放置一段时间后出现沉淀，最不可能导致该现象的原因是","options":["染料与助剂发生化学反应","染液pH超出染料稳定范围","配制用水硬度过高","量取母液时使用了移液管"],"answer":[3],"explanation":"知识点是染液沉淀原因分析。使用移液管是正常量取操作，不会引起沉淀，故为最不可能项。染料与助剂反应、pH超范围、硬水中的钙镁离子都会导致染料析出或沉淀。","tier":"进阶"},{"id":139,"type":"single","stem":"配制分散染料染液时，通常需要将染料与分散剂一起研磨或高速搅拌，其主要目的是什么","options":["使染料颗粒细化并稳定悬浮","使染料与纤维发生化学反应","提高染料的升华牢度","降低染色所需的最高温度"],"answer":[0],"explanation":"知识点是分散染料使用特性。分散染料难溶于水，需借助分散剂研磨成细小颗粒稳定悬浮于染液中，故正确项对。分散染料靠范德华力和氢键上染，不靠化学反应；升华牢度由染料分子结构决定；研磨不能降低染色温度。","tier":"基础"},{"id":140,"type":"single","stem":"在配制染液时，需要将浓硫酸缓慢加入水中，正确的操作顺序是","options":["将水缓慢倒入浓硫酸中并搅拌","将浓硫酸缓慢倒入水中并搅拌","将浓硫酸和水同时倒入容器中","先将浓硫酸加热后再加入水中"],"answer":[1],"explanation":"知识点是浓硫酸稀释安全操作。浓硫酸稀释放出大量热，必须将酸缓慢加入水中并搅拌散热，故正确项对。将水倒入浓硫酸会因局部剧烈放热使酸液飞溅；同时倒入无法控制放热；加热浓硫酸会加剧危险。","tier":"基础"},{"id":141,"type":"single","stem":"用电子天平称量2.000 g染料，下列操作中会导致称量结果偏大的是","options":["称量前天平未调零且零点偏高","称量时容器外壁附着水珠","称量后染料吸收了空气中的水分","称量时天平未放水平且偏向一侧"],"answer":[1],"explanation":"知识点是称量误差分析。容器外壁附着水珠会增加被称物实际质量，使读数偏大，故正确项对。零点偏高会使读数偏小；染料吸潮发生在称量后，不影响本次读数；天平未放平影响稳定性但不必然使结果偏大。","tier":"挑战"},{"id":142,"type":"single","stem":"某化验室需要配制含染料2%（owf）、浴比1:20的染液用于10 g织物小样染色，应称取染料多少克","options":["0.2 g","0.5 g","1.0 g","2.0 g"],"answer":[0],"explanation":"知识点是owf染料用量计算。2%（owf）指染料质量为织物质量的2%，10 g×2%=0.2 g，故正确项对。0.5 g相当于5%（owf）；1.0 g相当于10%；2.0 g相当于20%，均为百分比与质量关系混淆。","tier":"基础"},{"id":143,"type":"single","stem":"配制染液时发现染料溶解不完全，烧杯底部有少量未溶颗粒，下列处理方式中最恰当的是","options":["继续加热搅拌至颗粒完全溶解后再使用","直接倒入染槽中随染色过程慢慢溶解","用滤纸过滤后丢弃滤渣直接使用滤液","补加少量染料以补偿未溶解的部分"],"answer":[0],"explanation":"知识点是染液配制异常处置。未溶颗粒应继续加热搅拌使其完全溶解，保证浓度准确，故正确项对。直接倒入染槽会造成色点色斑和浓度不准；过滤丢弃滤渣会使实际浓度偏低；补加染料无法确定补加量，均不妥。","tier":"挑战"},{"id":144,"type":"single","stem":"某化验室配制活性染料染液时，操作工先将染料用热水溶解，再称取纯碱加入，结果染液出现大量絮状物，最可能的原因是","options":["热水温度过高使染料分解","纯碱加入使pH升高导致染料凝聚","染料与纯碱发生放热反应","染料溶解时间过长导致水解"],"answer":[1],"explanation":"知识点是活性染料对碱的敏感性。活性染料在碱性条件下活性基团易与水中羟基反应或发生凝聚，先溶解后加碱若局部pH过高会析出絮状物，故正确项对。热水温度高主要影响水解速度而非直接产生絮状物；染料与纯碱一般不发生放热反应；溶解时间过长会水解但通常不形成絮状物。","tier":"进阶"},{"id":145,"type":"multi","stem":"配制染液过程中，下列哪些做法有助于保证所配染液浓度的准确性","options":["称量前校准电子天平并调零","使用经检定合格的容量瓶定容","溶解后待溶液冷却至室温再定容","将未溶解的染料颗粒过滤后丢弃","用量筒代替容量瓶进行精确移液"],"answer":[0,1,2],"explanation":"知识点是染液配制准确度控制。校准天平、用合格容量瓶、冷却后定容均是保证浓度准确的关键操作，故三项正确。过滤丢弃未溶颗粒会使实际染料量低于配方要求；量筒精度低于容量瓶和移液管，不能用于精确移液。","tier":"进阶"},{"id":146,"type":"single","stem":"化验室用分析天平称取0.5g染料，称量纸已去皮归零，加入染料后读数为0.5230g，而配方要求0.5000g，此时正确的做法是什么","options":["用药匙小心取出多余染料至读数0.5000g","记录实际用量并按此重量折算其他助剂用量","倒掉重新称取一份新的0.5000g染料","再加染料至0.5500g后按比例放大配方"],"answer":[0],"explanation":"知识点：称量精度控制。配方要求准确称量，超出量应用药匙逐步取出至目标值。按实际折算会偏离既定配方；倒掉重称浪费且无必要；随意放大配方会改变浴比和浓度。","tier":"挑战"},{"id":147,"type":"single","stem":"某活性染料配方要求浴比1:20、染料2%(owf)、织物重50kg，配制染液时需称取染料多少克","options":["100g","1000g","2000g","250g"],"answer":[1],"explanation":"知识点：owf用量计算。2%(owf)指染料对织物重的百分比，50kg×2%=1kg=1000g。浴比只影响加水体积，不影响染料对织物重的计算。100g误按1%、2000g误按4%、250g误按0.5%计算。","tier":"基础"},{"id":148,"type":"single","stem":"配制还原染料隐色体染液时，加入保险粉后染液应呈现何种状态才表明还原充分","options":["染液呈澄清的黄绿色或橙红色透明液","染液表面出现大量气泡并浑浊","染液由透明变为深黑且带沉淀","染液温度明显升高并冒白烟"],"answer":[0],"explanation":"知识点：还原染料隐色体还原。还原充分的隐色体染液澄清透明，呈黄绿或橙红等特征色。气泡浑浊可能是还原不足或过度；深黑沉淀是还原不良或染料析出；升温冒烟是加料过猛的危险现象。","tier":"进阶"},{"id":149,"type":"single","stem":"配制酸性染料染液时，配方要求用醋酸调节pH至4.5，化验员手边只有硫酸，直接等量替代醋酸的做法会带来什么问题","options":["硫酸酸性强且无缓冲能力，易使pH骤降并损伤纤维","硫酸与酸性染料会发生络合使色光变暗","硫酸会使染液沸点升高导致上染过快","硫酸会与硬水中的钙镁离子生成沉淀"],"answer":[0],"explanation":"知识点：酸剂选择与pH缓冲。醋酸是弱酸有缓冲作用，硫酸是强酸无缓冲，等量替代会使pH骤降损伤纤维并影响匀染。络合变暗、沸点升高、钙镁沉淀均非硫酸替代醋酸的主要问题。","tier":"进阶"},{"id":150,"type":"single","stem":"活性染料染液配制后放置时间过长，即使未加碱也会出现染料浓度下降，最可能的原因是","options":["染料在水溶液中发生水解反应","染料分子聚集沉降到容器底部","水中钙镁离子与染料结合沉淀","染液吸收空气中二氧化碳使pH下降"],"answer":[0],"explanation":"知识点：活性染料水解。活性染料含活性基团，在水中即使不加碱也会缓慢水解失活，故应现配现用。聚集沉降可用搅拌恢复；钙镁沉淀是硬水问题；吸收CO2降pH不导致染料本身浓度下降。","tier":"进阶"},{"id":151,"type":"single","stem":"分散染料染液配制时，常需将染料与分散剂一起研磨或高速搅拌，其主要作用是什么","options":["使染料颗粒细化并稳定悬浮在水中","使染料溶解成真溶液便于上染","使染料与分散剂发生化学反应生成新染料","降低染液黏度以便于管道输送"],"answer":[0],"explanation":"知识点：分散染料使用特性。分散染料难溶于水，需借助分散剂研磨细化成稳定悬浮液。它不能溶成真溶液；分散剂是物理分散非化学反应；研磨细化反而可能增稠而非降黏。","tier":"基础"},{"id":152,"type":"single","stem":"化验室配制染液时发现染料称量后加入水中始终有少量不溶颗粒，最合理的下一步处置是什么","options":["过滤除去不溶颗粒后重新计算实际浓度","继续加热并延长搅拌时间至颗粒全溶","补加少量碱使染料完全溶解","换用更高温度的软水重新溶解"],"answer":[0],"explanation":"知识点：染液配制异常处置。出现不溶颗粒应过滤并重新核算实际浓度，避免浓度偏差。部分染料本就不溶，加热延长未必有效且可能水解；加碱可能破坏染料；换软水只解决硬度问题不能解决不溶物。","tier":"挑战"},{"id":153,"type":"single","stem":"某车间配制活性染料染液时先加了碱剂再称染料，染色后发现得色比往常浅，最可能的环节错误是什么","options":["碱剂加入过早使染液pH过高导致染料水解","染料称量时天平未归零导致偏少","溶解用水温度过低使染料未全溶","浴比偏大导致染料浓度被稀释"],"answer":[0],"explanation":"知识点：加料顺序与活性染料水解。活性染料应在染色前才加碱，碱加入过早会使染液pH升高加速染料水解，降低固色率。称量偏差、水温低、浴比大均影响上染，但本案关键错误是加碱时序。","tier":"进阶"},{"id":154,"type":"single","stem":"化验室用同一台电子天平先称取NaCl助剂再称取活性染料，称量前未做任何清洁处理，这种做法可能造成的主要影响是什么","options":["残留助剂污染染料，影响染料纯度与称量准确度","天平读数漂移使两次称量结果同时偏大","染料与助剂在秤盘上提前发生化学反应","天平传感器受潮导致示值不稳定"],"answer":[0],"explanation":"知识点：称量交叉污染。同一秤盘残留助剂会混入染料影响纯度，且残留物计入称量造成偏差。读数漂移、提前反应、传感器受潮均非残留助剂的直接后果。","tier":"基础"},{"id":155,"type":"single","stem":"配制染液时配方要求加入元明粉作为促染剂，化验员误将其当作匀染剂在染色初期加入，可能造成的结果是什么","options":["上染速率过快，易产生色花和染色不匀","染料完全不上染导致织物无色","染液pH急剧升高破坏染料结构","染料在低温下大量聚集析出"],"answer":[0],"explanation":"知识点：促染剂与匀染剂作用区别。元明粉是促染剂，初期加入会加速上染造成色花。它不会阻止上染；元明粉不显著升高pH；聚集析出一般是电解质过量或温度骤变所致，与初期加入的直接后果不符。","tier":"基础"},{"id":156,"type":"multi","stem":"化验室配制染液前对水质和容器进行检查，下列哪些做法是合理的","options":["测定水的硬度，硬水先软化再用于配制染液","配制不同染料时容器专用并清洗干净防止交叉污染","染液容器使用前用对应染料液少量润洗以减少浓度偏差","使用金属容器盛放所有类型的染液以便于加热","配制后染液敞口放置以便观察颜色变化"],"answer":[0,1,2],"explanation":"知识点：染液配制用水与容器管理。硬水影响上染需软化；容器专用清洗防交叉污染；润洗可减少器壁吸附造成的浓度偏差。金属容器可能与某些染料反应，不宜通用；敞口放置会挥发、氧化、落入杂质，不应采用。","tier":"进阶"},{"id":157,"type":"single","stem":"化验室配制染液时，用分析天平称取染料，若称量纸在称量前未归零去皮，直接称得数值为0.512g，而称量纸实际质量为0.048g，则染料真实质量是多少","options":["0.464g","0.512g","0.560g","0.488g"],"answer":[0],"explanation":"知识点是去皮归零的称量计算。称得值包含纸重，真实染料质量=0.512-0.048=0.464g，故A对；0.512g是未去皮的读数，B错；0.560g是把纸重加进去，C错；0.488g是误算结果，D错。","tier":"基础"},{"id":158,"type":"single","stem":"某化验室配制酸性染料染液时，配方要求用醋酸调节pH至4.5，操作工手边只有醋酸钠，直接用它代替醋酸加入，最可能导致的结果是什么","options":["染液pH偏高，上染速率和上染率下降","染液pH偏低，纤维被过度损伤","染液pH不变，只是缓冲能力增强","染液pH偏高，但上染速率反而加快"],"answer":[0],"explanation":"知识点是酸、盐在染液pH调节中的区别。醋酸是酸可降低pH，醋酸钠是弱酸强碱盐呈弱碱性，替代后pH达不到4.5而偏高，酸性染料上染依赖酸性条件，故上染下降，A对；醋酸钠不会使pH偏低，B错；pH会变化，C错；pH偏高不会使上染加快，D错。","tier":"基础"},{"id":159,"type":"single","stem":"配制分散染料染液时，染料先用少量冷水调开，再加入40℃左右温水搅拌，若直接倒入90℃以上热水并剧烈搅拌，最容易出现的问题是","options":["染料颗粒团聚形成色点","染料完全溶解成真溶液","染液pH自动降到4以下","染料发生化学分解失去颜色"],"answer":[0],"explanation":"知识点是分散染料的高温分散行为。分散染料靠分散剂悬浮，骤遇高温并剧烈搅拌易使颗粒碰撞团聚，形成色点，故A对；分散染料不是真溶液，B错；温度不会自动改变pH，C错；常规90℃不会使分散染料分解，D错。","tier":"进阶"},{"id":160,"type":"single","stem":"活性染料染液配制后放置时间过长，尤其是已加碱固色剂的染液，最容易发生的质量变化是","options":["染料与碱缓慢反应导致上染率下降","染液黏度升高变成凝胶","染料颗粒逐渐沉淀但上染率不变","染液pH逐渐下降至中性"],"answer":[0],"explanation":"知识点是活性染料的碱剂加入与存放。活性染料加碱后乙烯砜基等活性基会缓慢水解失活，放置越久上染率越低，故A对；染液变凝胶不是主要变化，B错；沉淀且上染率不变的说法自相矛盾，C错；加碱后pH应偏碱不会降至中性，D错。","tier":"挑战"},{"id":161,"type":"single","stem":"化验室用移液管量取浓染液配制稀释液，操作时移液管尖端残留一滴未排尽就调定刻度，这会造成所取体积出现什么偏差","options":["实际所取体积偏小，稀释液浓度偏低","实际所取体积偏大，稀释液浓度偏高","体积无偏差，只是读数慢一些","体积偏大但浓度不受影响"],"answer":[0],"explanation":"知识点是移液管的正确使用。尖端残留液未排尽就调刻度，相当于刻度以下实际液体不足，所取体积偏小，稀释后浓度偏低，故A对；B方向相反，C忽略残留影响，D浓度必然受影响，均错。","tier":"进阶"},{"id":162,"type":"single","stem":"配制染液时配方要求加入元明粉（无水硫酸钠）作促染剂，操作工误用了芒硝（十水硫酸钠），若要达到相同的促染效果，加入量应如何调整","options":["应增加用量，因为芒硝含结晶水有效成分低","应减少用量，因为芒硝溶解更快","用量不变，两者有效成分相同","应减少用量，因为芒硝碱性更强"],"answer":[0],"explanation":"知识点是元明粉与芒硝的有效成分换算。芒硝含十个结晶水，硫酸钠有效含量远低于无水元明粉，达到相同促染效果需更多用量，故A对；芒硝有效成分低不应减少，B错；两者有效成分不同，C错；促染靠硫酸钠而非碱性，D错。","tier":"进阶"},{"id":163,"type":"single","stem":"操作工配制活性染料染液时，按配方称好染料后先加碱剂再加热水溶解，结果染液出现部分染料凝聚，正确的操作顺序应该是什么","options":["先用冷水调浆并加热水溶解，染色前再加碱剂","先加碱剂调pH，再加冷水调浆和热水溶解","碱剂和染料一起加入冷水中同时搅拌","先加热水溶解，再加碱剂，最后加冷水调浆"],"answer":[0],"explanation":"知识点是活性染料加碱时机。活性染料应先溶解好，碱剂在染色前或染色过程中加入，避免碱存在下加热导致水解凝聚，故A对；先加碱再溶解会加速水解凝聚，B错；碱与染料同加冷水同样使染料在碱性下处理，C错；先热水溶解后加碱再冷水调浆顺序混乱且调浆应在最前，D错。","tier":"进阶"},{"id":164,"type":"single","stem":"化验室配制染液时发现天平称量结果重复性差，同一砝码多次称量读数波动较大，下列处置中最合理的是","options":["停止使用并报修，校准后再用于配方称量","继续使用但每次多称几次取平均值","把天平搬到染色车间继续使用","改用台秤代替分析天平称染料"],"answer":[0],"explanation":"知识点是称量设备的可靠性管理。称量重复性差说明天平失准，用于配方称量会直接影响染料用量，应先停用报修校准，故A对；取平均值不能消除系统失准，B错；搬动会加剧失准且车间环境更差，C错；台秤精度远低于分析天平，无法满足染料称量，D错。","tier":"挑战"},{"id":165,"type":"multi","stem":"配制染液时为保证称量和配液准确，下列做法中正确的有哪些","options":["称量前检查天平水平并归零去皮","染料和助剂分别称量并做好标识","染液定容时视线与刻度线保持水平","称量完毕立即把多余染料倒回原瓶","配制好的染液放置过夜后直接使用"],"answer":[0,1,2],"explanation":"知识点是染液配制的基本操作规范。称前检查归零、分别称量标识、定容平视刻度都是保证准确的基本要求，A、B、C对；多余染料倒回原瓶易造成污染和吸潮，D错；放置过夜染液可能水解或沉降，应重新确认后使用，E错。","tier":"挑战"},{"id":166,"type":"single","stem":"配制活性染料染液时，称取染料后先用少量冷水调成浆状，再加入温水溶解，这一操作的主要目的是","options":["防止染料结块并促进均匀溶解","降低染料的水解速率","提高染料的直接性","减少染料的飞扬损失"],"answer":[0],"explanation":"知识点是染料溶解操作要点。染料先调浆可避免直接加温水时表面润湿不均形成团块，从而保证溶解均匀；降低水解速率主要靠控制温度和碱剂加入时机，不是调浆的目的；直接性是染料对纤维的亲和力，与调浆无关；减少飞扬主要靠称量操作和通风，不是调浆的主要目的。","tier":"进阶"},{"id":167,"type":"single","stem":"某化验室配制元明粉促染液时，发现溶液底部有少量未溶固体，最合理的处理方式是","options":["加热并搅拌至完全溶解后再使用","补加少量清水稀释后直接使用","静置后取上层清液使用","补加同浓度元明粉溶液后使用"],"answer":[0],"explanation":"知识点是促染剂的溶解要求。元明粉溶解度随温度升高而增大，加热搅拌可使其完全溶解，保证浓度准确；补加水会改变规定浓度；取上层清液会低估实际用量且浓度不准；补加同浓度溶液不能解决底部未溶固体问题，反而使总量偏离配方。","tier":"挑战"},{"id":168,"type":"single","stem":"用电子天平称取染化料时，下列做法中能减小称量误差的是","options":["先称空容器去皮后再加料读数","称量时用手直接拿取砝码","在天平未水平时快速称量","称量纸随物料一起计入皮重"],"answer":[0],"explanation":"知识点是电子天平操作规范。去皮后加料读数可扣除容器质量，直接得到物料净重，减小误差；手直接拿砝码会引入汗渍和温度影响；天平未水平会导致读数偏差；称量纸若未提前计入皮重会造成系统误差，不能减小误差。","tier":"挑战"},{"id":169,"type":"single","stem":"配制分散染料染液时，常将染料与分散剂共同研磨或高速搅拌，其主要作用是","options":["使染料颗粒细化并稳定悬浮","提高染料的升华牢度","降低染液的pH值","增加染料的上染百分率"],"answer":[0],"explanation":"知识点是分散染料的分散稳定性。分散染料难溶于水，需借助分散剂和机械作用使颗粒细化并稳定悬浮，防止聚集沉降；升华牢度取决于染料结构和后处理，不靠研磨提高；pH由酸剂调节；上染百分率受温度、时间、助剂等多因素影响，研磨本身不直接提高。","tier":"基础"},{"id":170,"type":"single","stem":"某染色车间配制酸性染料染液时，配方要求用醋酸调节pH至4.5，化验员手边只有硫酸，正确的处理方式是","options":["按酸强度换算硫酸用量后缓慢加入并复测pH","直接用硫酸代替醋酸且用量与醋酸相同","将硫酸稀释后按醋酸体积等量加入","先加硫酸再用纯碱回调至pH4.5"],"answer":[0],"explanation":"知识点是酸剂换算与pH控制。不同酸强度不同，必须换算后缓慢加入并复测pH，避免过酸；等量代替会因硫酸酸性远强于醋酸导致pH过低；按体积等量加入同样未考虑强度差异；先加酸再用碱回调会引入多余盐分且操作反复，不是正确做法。","tier":"进阶"},{"id":171,"type":"single","stem":"某化验室按配方配制染液时，需将少量高浓度母液稀释到工作液，正确的稀释操作是","options":["取母液加入部分水后再补足至规定体积并混匀","将水加入母液中再补足至规定体积并混匀","取母液直接加入染槽后加水至刻度","将母液与水按质量比混合后不计量体积"],"answer":[0],"explanation":"知识点是溶液稀释操作。正确做法是先取母液加部分水稀释，再补足至规定体积并混匀，保证浓度准确；将水加入母液虽也能稀释，但操作顺序不利于均匀混合且易残留；直接加入染槽后加水至刻度会因混合不均导致浓度偏差；不计量体积无法保证稀释倍数准确。","tier":"进阶"},{"id":172,"type":"single","stem":"某染色车间配制染液时，发现配方中元明粉用量为40g/L，实际染液体积为250L，化验员计算后应称取元明粉的质量是","options":["10kg","1kg","100kg","4kg"],"answer":[0],"explanation":"知识点是染化料用量计算。40g/L×250L=10000g=10kg；1kg对应4g/L；100kg对应400g/L；4kg对应16g/L，均为计算错误。","tier":"挑战"},{"id":173,"type":"single","stem":"某化验室配制染液时，按配方加入染料和助剂后发现pH低于工艺要求，正确的处理方式是","options":["用已配好的稀碱液缓慢滴加并搅拌复测","直接加入固体纯碱快速中和","加入大量清水稀释后使用","弃去该染液重新配制不再调整"],"answer":[0],"explanation":"知识点是染液pH调整操作。用稀碱液缓慢滴加并搅拌复测可避免局部过碱，保证pH准确；直接加固体纯碱易造成局部过碱和溶解不均；加大量清水会改变染液浓度和浴比；弃去重配虽可解决但浪费且未掌握调整方法，不是首选正确处置。","tier":"挑战"},{"id":174,"type":"multi","stem":"某化验室配制染液时，下列操作中符合染化料称量与配制规范的有","options":["称量前核对染化料名称、规格和有效期","易吸潮的染化料称量后及时密封","配制染液时先加染料再加助剂并充分搅拌","称量不同染化料时共用同一把未清理的勺","配制完成后在容器上标注名称和配制日期"],"answer":[0,1,4],"explanation":"知识点是染化料称量与配制规范。核对名称规格有效期可防止用错料；易吸潮料称后密封可防止吸潮结块影响称量准确；配制完成后标注名称日期便于追溯管理。共用未清理的勺会造成交叉污染；先加染料再加助剂并搅拌虽常见，但不同助剂加入顺序有工艺要求，笼统说先加染料再加助剂并搅拌不够规范，不能作为通用正确项。","tier":"挑战"},{"id":175,"type":"single","stem":"配制活性染料染液时，称取染料前对粉状染料进行研磨或过筛的主要目的是什么","options":["使染料颗粒细化均匀以便准确称量和快速溶解","使染料在储存中不易吸潮结块","使染料色光在研磨后更加鲜艳","使染料与助剂不发生化学反应"],"answer":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owf即染料质量为织物质量的2%，50kg×2%=1kg=1000g。B项500g相当于1% owf，少算一半；C项2000g相当于4% owf，多算一倍；D项100g相当于0.2% owf，计算错误。","tier":"基础"},{"id":181,"type":"single","stem":"化验室配制染液时，用移液管量取浓染液，下列操作中正确的是","options":["用洗耳球吸取，管尖插入液面下约1cm，放液时管尖靠壁","用嘴吸取，管尖插入液面下约1cm，放液时管尖靠壁","用洗耳球吸取，管尖插入液面下约3cm，放液时管尖悬空","用洗耳球吸取，管尖插入液面下约1cm，放液时管尖悬空"],"answer":[0],"explanation":"知识点是移液管操作规范。正确做法是用洗耳球吸取、管尖插入液面下约1cm、放液时管尖靠壁。B项用嘴吸取染料液有中毒风险且不规范；C项插入过深外壁沾液影响体积、放液悬空易挂液；D项放液悬空会使管内残留液偏多，量取体积不准。","tier":"挑战"},{"id":182,"type":"single","stem":"某化验室配制染液时，发现同一配方连续两缸染色深度差异明显，经查称量、溶解、浴比均正常，下一步应优先检查什么","options":["染液配制用水的水质与温度是否稳定","染料包装袋的印刷批号是否一致","化验室通风橱的风量是否足够","染色织物的缝头方式是否统一"],"answer":[0],"explanation":"知识点是染色重现性异常排查。称量、溶解、浴比正常时，水质硬度、pH和配制水温波动会直接影响上染率，应优先检查。B项批号一致不代表水质温度稳定，且批号已查；C项通风橱风量与染液浓度无关；D项缝头方式影响染色均匀性但不影响两缸深度差异。","tier":"挑战"},{"id":183,"type":"single","stem":"配制还原染料染液时，需要加入保险粉进行还原，下列操作中正确的是","options":["在碱性条件下加入保险粉并控制温度不超过规定值","在酸性条件下加入保险粉并加热至沸腾","在中性条件下加入保险粉并剧烈搅拌","在碱性条件下加入保险粉并敞口放置"],"answer":[0],"explanation":"知识点是还原染料还原操作。保险粉在碱性条件下才有还原能力，且温度过高会分解，需控制温度。B项酸性条件下保险粉分解失效；C项中性条件还原能力不足；D项敞口放置保险粉会被空气氧化，还原效果下降。","tier":"挑战"},{"id":184,"type":"single","stem":"化验室配制染液时，将高浓度母液稀释到工作液，下列做法中正确的是","options":["先量取母液加入容器，再加水至刻度并混匀","先加水至刻度，再量取母液加入并混匀","先加母液和水各一半，再补加水至刻度","先加母液，再加水至略低于刻度，放置后补加"],"answer":[0],"explanation":"知识点是溶液稀释操作。正确做法是先量取母液加入容器，再加水至刻度并混匀，保证浓度准确。B项先加水至刻度再加母液会超过刻度、浓度偏低；C项分次加水难以控制最终体积；D项放置后补加会因体积收缩或挂壁造成浓度偏差。","tier":"挑战"},{"id":185,"type":"single","stem":"配制活性染料染液时，称取染料后先加少量冷水调成均匀浆状，再加入规定温度的水搅拌，这样做的主要目的是","options":["防止染料遇热水结块并减少粉尘飞扬","利用冷水先溶解染料中的电解质","使染料在低温下完成上染反应","让染料颗粒吸水膨胀后再降温使用"],"answer":[0],"explanation":"知识点是染料化料操作。活性染料直接遇热水易外层胶凝包住内层，形成难溶结块，先调浆可避免结块并减少粉尘。冷水不能溶解电解质，也不发生上染反应；吸水膨胀后仍需按要求升温溶解，而非降温使用。","tier":"进阶"},{"id":186,"type":"single","stem":"化验室配制保险粉（连二亚硫酸钠）溶液时，下列操作顺序中正确的是","options":["先在容器中加好规定量的水，再将保险粉缓缓加入并搅拌溶解","把保险粉先倒入空容器，再一次性冲入热水快速溶解","将保险粉与烧碱一起干粉混合后再加水溶解","先用沸水溶解保险粉，再补加冷水调整到规定体积"],"answer":[0],"explanation":"知识点是还原剂化料。保险粉遇热水、遇酸或与空气长时间接触易分解，应先备水后加料、水温不宜过高并随配随用。先投粉后冲热水会加剧分解；与烧碱干混易受潮放热分解；沸水溶解会大量损耗有效成分。","tier":"进阶"},{"id":187,"type":"single","stem":"某化验室配制分散染料染液时，发现染料颗粒在研磨后仍有少量粗粒，正确的处理方式是","options":["继续研磨并过规定目数筛网后再使用","加水稀释后直接倒入染缸使用","提高染液温度使粗粒自行溶解","加入匀染剂后静置让其自然沉降"],"answer":[0],"explanation":"知识点是分散染料化料质量。分散染料靠微粒分散上染，粗粒会造成色点色斑，应继续研磨并过滤。稀释直接使用会把粗粒带入染缸；升温不能使分散染料真溶；加匀染剂不能消除已存在的粗粒，静置沉降后取上层也不等于粗粒合格。","tier":"挑战"},{"id":188,"type":"single","stem":"配制酸性染料染液时，处方要求用醋酸调节pH，化验员手边只有冰醋酸，正确的做法是","options":["按冰醋酸的实际含量换算后称取并稀释加入","按处方上醋酸的体积数直接量取冰醋酸加入","把冰醋酸加热驱除水分后按原量加入","将冰醋酸与烧碱中和后再按原量加入"],"answer":[0],"explanation":"知识点是酸碱用量换算。冰醋酸含量远高于普通醋酸，必须按实际浓度折算。直接按体积取用会使酸量偏高、pH过低；加热驱水会挥发损失且危险；中和后已不是酸，无法起到调pH作用。","tier":"挑战"},{"id":189,"type":"single","stem":"配制染液时需将助剂A稀释10倍后使用，处方要求加入稀释液50mL，则应称取助剂A原液的体积是","options":["5mL","10mL","50mL","500mL"],"answer":[0],"explanation":"知识点是稀释倍数换算。稀释10倍指原液1份加水至10份，稀释液50mL中含原液50÷10=5mL。10mL是低估稀释倍数、50mL是未稀释、500mL是把倍数方向弄反。","tier":"进阶"},{"id":190,"type":"single","stem":"化验室配制含有表面活性剂的染液时，量取粘稠助剂后量筒内壁挂壁明显，为保证加料量准确，正确做法是","options":["用少量温水多次涮洗量筒并将涮洗液并入染液","用原助剂反复冲洗量筒外壁后直接读数","把量筒倒置沥干后按挂壁量补加原助剂","将量筒加热使挂壁助剂流下后继续使用"],"answer":[0],"explanation":"知识点是粘稠助剂的准确计量。挂壁会造成实际加入量不足，应用温水涮洗转移。冲洗外壁与计量无关；倒置沥干无法确定补加量；加热量筒可能使助剂变质且不安全。","tier":"挑战"},{"id":191,"type":"single","stem":"某厂配制还原染料悬浮体染液，处方规定用软水，化验员用自来水代替后发现染液出现絮凝，最可能的原因是","options":["自来水中钙镁离子破坏了分散体系的稳定性","自来水中氯离子使染料发生还原反应","自来水温度偏低导致染料结晶析出","自来水中溶解氧使染料提前氧化发色"],"answer":[0],"explanation":"知识点是水质对染液稳定性的影响。钙镁离子会压缩微粒表面双电层，使分散体絮凝。氯离子一般不引起还原；水温低主要影响溶解速度；溶解氧主要影响还原剂，不是导致絮凝的主因。","tier":"挑战"},{"id":192,"type":"single","stem":"配制好的染液在使用前需要核对处方，下列核对内容中属于关键项目的是","options":["染料品种、助剂用量、染液体积和pH","染料包装桶的颜色和摆放位置","配制时使用的搅拌棒材质和长度","化验室当天的室温和照明亮度"],"answer":[0],"explanation":"知识点是染液配制复核。品种、用量、体积、pH直接决定上染结果。包装颜色、搅拌棒规格、照明亮度与处方准确性无直接关系，属于干扰项。","tier":"进阶"},{"id":193,"type":"single","stem":"配制阳离子染料染液时，发现染料溶解后有少量不溶物，正确的操作是","options":["过滤除去不溶物后再使用并记录实际用量","加热到沸腾使不溶物全部溶解后使用","加入阴离子助剂使不溶物络合后使用","静置后取上层清液按原处方量使用"],"answer":[0],"explanation":"知识点是阳离子染料化料。不溶物会造成色点，应过滤并记录。沸腾可能使染料分解；阳离子染料遇阴离子助剂易生成沉淀；静置取上清液会使实际染料量不足。","tier":"挑战"},{"id":194,"type":"single","stem":"化验室配制碱性染料染液时，玻璃器皿用后未及时清洗，残留染料干结，正确的清洗方式是","options":["先用稀酸或酒精润湿溶解残留，再用清水冲洗","直接用钢丝球用力刮擦去除干结染料","用热的浓烧碱液长时间浸泡后冲洗","用汽油浸泡后直接倒入下水道"],"answer":[0],"explanation":"知识点是化验室器皿清洗。碱性染料残留可用稀酸或酒精溶解后冲洗。钢丝球会划伤器皿；热浓烧碱可能腐蚀玻璃并影响后续使用；汽油易燃且不能直接倒入下水道。","tier":"进阶"},{"id":195,"type":"single","stem":"某化验员配制染液时，处方要求加元明粉20g/L，配制总体积为2L，则应称取元明粉的质量是","options":["40g","20g","10g","80g"],"answer":[0],"explanation":"知识点是浓度与体积计算。20g/L×2L=40g。20g是只按1L计算；10g是把体积除以2；80g是把体积乘以4，均属计算错误。","tier":"基础"},{"id":196,"type":"single","stem":"用容量瓶配制标准染液时，定容操作应在下列哪个温度条件下进行，才能保证浓度准确","options":["与容量瓶标定温度一致的室温","高于标定温度10℃的热水浴","低于标定温度5℃的冰水浴","任意室温下快速定容即可"],"answer":[0],"explanation":"知识点：容量器皿的温度校准。容量瓶体积是在标定温度（通常20℃）下确定的，只有在接近标定温度时体积才准确，故A正确。升温会使玻璃膨胀且液体密度变化，读数体积偏大，B错。降温同样使体积偏离标定值且操作不便，C错。任意室温快速定容会因温度偏差引入系统误差，D错。","tier":"进阶"},{"id":197,"type":"single","stem":"某化验室配制分散染料染液时，发现染料颗粒始终悬浮难以分散均匀，最恰当的处理方式是","options":["补加少量分散剂并适当升温搅拌","直接加入浓硫酸助溶后过滤","延长静置时间让颗粒自然沉降","用纱布反复过滤去除粗颗粒"],"answer":[0],"explanation":"知识点：分散染料分散性调节。分散染料靠分散剂悬浮于水中，分散不良时可补加分散剂并升温搅拌改善，故A正确。浓硫酸会破坏染料结构且极危险，不是助溶手段，B错。静置沉降会使染液浓度不均，无法使用，C错。过滤除粗颗粒会损失染料且改变浓度，D错。","tier":"挑战"},{"id":198,"type":"single","stem":"配制酸性染料染液时，通常先加染料溶解，再加酸调节pH，若顺序颠倒先加酸后加染料，最容易出现的问题是","options":["染料遇酸析出沉淀难以重新溶解","染液pH反而升高影响上染","染料发生还原分解颜色变浅","酸被染料中和失去调pH作用"],"answer":[0],"explanation":"知识点：酸性染料溶解与加酸顺序。酸性染料多为磺酸盐，先加酸使染液呈强酸性时染料溶解度下降易析出，故A正确。加酸只会降低pH不会升高，B错。常温下酸不会使染料还原分解，C错。染料不会把酸中和掉，D错。","tier":"进阶"},{"id":199,"type":"single","stem":"某染色车间需要配制含固量10%的染液200kg，现有一批含固量40%的染料母液，应取母液多少kg再加水至200kg","options":["20kg","40kg","50kg","80kg"],"answer":[2],"explanation":"知识点：溶液稀释计算。按含固量守恒：40%×V=10%×200，V=50kg，故C正确。20kg对应含固量仅4%，A错。40kg对应含固量8%，B错。80kg对应含固量16%，D错。","tier":"基础"},{"id":200,"type":"single","stem":"用电子天平称量染料时，若天平未调水平就进行称量，对称量结果的主要影响是","options":["产生系统性的称量偏差","使天平读数随机跳动无法稳定","导致天平零点自动漂移失效","使称量结果偏大或偏小无规律"],"answer":[0],"explanation":"知识点：电子天平安装要求。天平未调水平时，重力分量方向偏移，读数会产生固定的系统性偏差，故A正确。读数随机跳动多与气流、振动、静电有关，不是未调水平的主要表现，B错。零点漂移多与预热不足、传感器温漂有关，C错。未调水平造成的是定向的系统误差而非无规律误差，D错。","tier":"进阶"},{"id":201,"type":"single","stem":"配制还原染料悬浮体染液时，染料研磨后需要加入分散剂并充分搅拌，若分散剂用量不足，染色时最可能出现的问题是","options":["染料颗粒聚集造成色点色斑","染料被过度还原颜色变深","染液黏度下降导致上染过快","染料在纤维上固色率提高"],"answer":[0],"explanation":"知识点：还原染料悬浮体稳定性。分散剂不足时染料微粒易重新聚集，染到织物上形成色点色斑，故A正确。分散剂用量与还原程度无关，B错。分散剂不足不会降低黏度，反而易絮凝，C错。分散不良只会降低匀染性，不会提高固色率，D错。","tier":"进阶"},{"id":202,"type":"single","stem":"在配制阳离子染料染液时，若使用硬水稀释，最可能引起的后果是","options":["染料与钙镁离子结合产生沉淀","染液pH自动降至强酸性","染料上染速率明显减慢","染液颜色向红光方向偏移"],"answer":[0],"explanation":"知识点：阳离子染料与水质。阳离子染料带正电荷，遇硬水中钙镁离子及阴离子易生成沉淀，故A正确。硬水一般偏弱碱或中性，不会自动变强酸，B错。生成沉淀后上染会异常而非单纯减慢，C错。颜色偏移不是硬水的主要影响，D错。","tier":"基础"},{"id":203,"type":"single","stem":"某操作工配制好一桶染液后，发现桶底有少量未溶染料沉淀，正确的处置方式是","options":["搅拌并适当加热使沉淀重新溶解后再使用","直接取上层清液用于染色","补加冷水稀释后立即使用","将沉淀滤出后按比例补加染料"],"answer":[0],"explanation":"知识点：染液配制质量控制。发现沉淀应通过搅拌、升温等方式使其重新溶解并确认均匀后再用，故A正确。只取上层清液浓度偏低，B错。补冷水不能溶解沉淀还可能加重析出，C错。滤出沉淀再补加难以精确控制浓度，D错。","tier":"挑战"},{"id":204,"type":"single","stem":"某化验室接到小样配方：染料2%（owf）、浴比1:20、织物5g，需配制染液总体积多少毫升","options":["50mL","100mL","200mL","500mL"],"answer":[1],"explanation":"知识点：浴比与染液体积计算。浴比1:20即每克织物用20mL水，5g织物需100mL，故B正确。50mL对应浴比1:10，A错。200mL对应1:40，C错。500mL对应1:100，D错。","tier":"进阶"},{"id":205,"type":"single","stem":"配制活性染料染液时，称取染料前先要用天平检查水平并调零，这一步的主要目的是","options":["消除称量系统的零点漂移误差","提高染料在温水中的溶解速度","防止染料粉尘在称盘上飞扬","缩短染液配制后的过滤时间"],"answer":[0],"explanation":"知识点是称量前校准。天平调零是为了消除零点漂移带来的系统误差，保证称量准确。B项错在调零与溶解速度无关；C项错在调零不能防粉尘飞扬，防飞扬靠加盖或通风；D项错在过滤时间由染液状态决定，与调零无关。","tier":"进阶"},{"id":206,"type":"single","stem":"某化验室用感量为0.01 g的天平称取2.00 g元明粉，读数时发现称盘上元明粉已明显高出容器口，正确的做法是","options":["先取下部分元明粉再加入容器中","直接将该容器连同元明粉一起投入染液","把容器放到天平外再慢慢补加至读数","用角匙压紧粉面后再读数"],"answer":[0],"explanation":"知识点是称量超量的处理。超量时应从容器中取出多余部分，不能把未按配方量的药品带入染液。B项错在超出配方量会影响染液浓度；C项错在离开天平后无法准确读数；D项错在压紧改变堆积状态，读数不准。","tier":"挑战"},{"id":207,"type":"single","stem":"配制酸性染料染液时，染料先用少量冷水调成浆状再加入热水，这样操作的主要作用是","options":["防止染料结块并促进均匀分散","降低染料在热水中的上染率","使染液pH值自动调到酸性","减少染料与金属离子的络合"],"answer":[0],"explanation":"知识点是染料溶解操作。先调浆可避免染料颗粒直接遇热水抱团结块，从而均匀分散。B项错在调浆不改变上染率；C项错在调浆不能自动调pH；D项错在络合由染料结构和金属离子决定，与调浆顺序无关。","tier":"基础"},{"id":208,"type":"single","stem":"用移液管吸取染液时，管尖残留的一滴液体正确的处理方式是","options":["让管尖靠壁停留规定时间后自然流出","用洗耳球把残留液吹入接收容器","用滤纸把管尖残留液吸掉","把移液管插入接收液内再放液"],"answer":[0],"explanation":"知识点是移液管规范操作。放液时管尖靠壁并按规定等待，让残留液自然流下，保证量取体积准确。B项错在吹入会超出标定体积；C项错在吸掉会使实际转移量偏少；D项错在插入液内放液会污染管尖且体积不准。","tier":"基础"},{"id":209,"type":"single","stem":"配制染液时发现染料溶解后液面有少量浮沫，化验室常用的处理方式是","options":["静置片刻待浮沫消散后再定容","立即加入消泡剂并剧烈搅拌","用吸管把浮沫逐滴吸走再定容","加热煮沸使浮沫全部逸出"],"answer":[0],"explanation":"知识点是定容前处理。少量浮沫静置即可消散，不影响浓度。B项错在消泡剂会引入杂质影响染色；C项错在吸走浮沫会带走部分染液使浓度偏低；D项错在煮沸可能改变染料性质且液面难判断。","tier":"挑战"},{"id":210,"type":"single","stem":"用托盘天平称取染化料时，砝码应放在右盘、药品放在左盘，这样规定的原因是","options":["使药品与砝码的取放互不污染","使天平横梁受力更均匀","使读数时游码方向与砝码一致","使称量结果不受空气浮力影响"],"answer":[0],"explanation":"知识点是托盘天平使用规范。左物右码便于操作且药品不接触砝码，避免交叉污染。B项错在受力均匀与左右位置无关；C项错在游码读数规则与左右盘无必然联系；D项错在空气浮力影响与左右放置无关。","tier":"进阶"},{"id":211,"type":"single","stem":"配制同一配方染液时，若把配方中元明粉用量误按无水元明粉计，而实际使用的是含结晶水的元明粉，则染液中实际元明粉有效成分会","options":["偏低，需补加至配方量","偏高，需稀释至配方量","不变，结晶水不影响有效成分","先偏低后偏高，最终仍为配方量"],"answer":[0],"explanation":"知识点是含结晶水与无水物的换算。含结晶水物有效成分低，若按无水物称量则实际有效成分不足，应补加。B项错在结果偏低不是偏高；C项错在结晶水占质量，有效成分会变；D项错在不会自动回到配方量，必须调整。","tier":"进阶"},{"id":212,"type":"single","stem":"用容量瓶配制标准染液，定容时仰视刻度线会使配出的染液浓度","options":["偏低，因实际加水量偏多","偏高，因实际加水量偏少","不变，因刻度线只作参考","先偏高后偏低，最终仍准确"],"answer":[0],"explanation":"知识点是容量瓶定容读数。仰视刻度线时眼睛低于刻度，看到液面已到刻度实际加水偏多，浓度偏低。B项错在仰视不是加水偏少；C项错在刻度线是定量依据；D项错在读数误差不会自动消除。","tier":"基础"},{"id":213,"type":"single","stem":"某化验室配制染液时，先用量筒量取浓染液再倒入容量瓶，发现量筒内壁挂有较多残液，正确的处理是","options":["用少量溶剂洗涤量筒内壁并将洗液并入容量瓶","把量筒倒扣在容量瓶口上让残液自然流入","用滤纸擦下量筒内壁残液再放入容量瓶","按量筒读数直接定容不再处理残液"],"answer":[0],"explanation":"知识点是量取转移的完全性。量筒挂壁残液应洗涤并入容量瓶，保证转移量准确。B项错在自然流入不完全且易污染；C项错在滤纸会吸附染液且带入纤维；D项错在残液未转移会使浓度偏低。","tier":"挑战"},{"id":214,"type":"multi","stem":"配制染液过程中，下列做法有助于保证浓度准确的是","options":["称量前检查天平水平并调零","定容时视线与刻度线保持水平","移液管放液时管尖靠壁并等待规定时间","量筒量取后不洗涤内壁直接定容","染液定容后立即从容量瓶倒出使用"],"answer":[0,1,2],"explanation":"知识点是配制准确度的控制。调零、平视定容、移液管规范放液都能保证量值准确。D项错在量筒挂壁残液未转移会使浓度偏低；E项错在定容后应摇匀再使用，立即倒出浓度不均。","tier":"进阶"},{"id":215,"type":"single","stem":"化验室用分析天平称取0.5000g染料时，下列操作中正确的是","options":["称量前先接通电源预热再校准零点","把染料直接倒在称盘中央快速读数","称量时用手直接拿取砝码夹取砝码","称完后立即关闭电源缩短预热时间"],"answer":[0],"explanation":"知识点：分析天平使用规范。电子天平需预热稳定后校准才能保证精度。B项染料直接倒称盘会腐蚀污染称盘且不易清理；C项应使用专用镊子或夹取工具，手取会污染砝码影响质量；D项立即断电会使天平未达热平衡，影响下次称量准确性。","tier":"挑战"},{"id":216,"type":"single","stem":"配制分散染料染液时，染料需在砂磨机中研磨，其目的是","options":["使染料颗粒细化到微米级以利均匀分散","使染料分子与纤维发生化学结合","使染料在高温下升华附着纤维","使染料溶解成真溶液状态"],"answer":[0],"explanation":"知识点：分散染料加工与使用。分散染料难溶于水，靠研磨成微小颗粒悬浮分散于染浴。B项分散染料与纤维主要是物理吸附和固着，不是研磨实现的化学结合；C项升华是染色后固色阶段的现象，与研磨目的不同；D项分散染料不是真溶液，研磨后仍是悬浮分散体。","tier":"进阶"},{"id":217,"type":"single","stem":"某化验室配制染液时发现染料称量值比配方要求多出约5%，正确的处理方式是","options":["按多称的量重新计算补加的水量和其他助剂","把多余染料倒回原瓶以减少浪费","直接按多称的量配制并在记录中注明","把多称部分刮掉后继续按原配方配制"],"answer":[0],"explanation":"知识点：配方计算与称量误差处理。称量偏差后应按实际称取量重新计算浴比和各助剂用量以保证浓度准确。B项倒回原瓶可能造成整瓶染料污染和吸湿；C项不调整水量会使染液浓度偏高，影响小样与大样一致性；D项刮掉无法精确控制且污染操作台。","tier":"挑战"},{"id":218,"type":"single","stem":"配制酸性染料染液时，通常先加入染料再用醋酸调pH，若先加醋酸后加染料可能出现的问题是","options":["染料在酸性液中易聚集析出影响溶解","醋酸挥发导致pH升高","染料与醋酸反应生成沉淀","染液温度下降导致溶解变慢"],"answer":[0],"explanation":"知识点：酸性染料溶解与pH调节顺序。先加酸使染浴呈酸性，染料颗粒进入酸性环境易聚集析出。B项醋酸挥发性不是此操作顺序的主要问题；C项酸性染料一般不与醋酸发生沉淀反应；D项加酸不显著改变温度，不是主要风险。","tier":"进阶"},{"id":219,"type":"single","stem":"阳离子染料与阴离子染料同浴使用时容易产生沉淀，化验室遇到需要同浴的配方时应优先采取的措施是","options":["加入防沉淀剂并分开溶解后缓慢混合","提高染浴温度到沸腾使其互溶","加大浴比稀释到沉淀消失","先加元明粉再依次加入两种染料"],"answer":[0],"explanation":"知识点：染料电荷相容性。阳离子与阴离子染料电荷相反易结合沉淀，需用防沉淀剂并分开溶解后缓慢混合。B项升温不能消除电荷中和；C项加大浴比只能延缓沉淀不能根本解决；D项元明粉主要起缓染作用，不能阻止阴阳离子染料结合。","tier":"挑战"},{"id":220,"type":"single","stem":"化验室配制还原染料悬浮体染液时，染料研磨后应存放于","options":["避光密闭容器中并在使用前搅拌均匀","敞口烧杯中以便观察沉降情况","高温烘箱中防止染料吸潮","强光下放置以促进染料分散"],"answer":[0],"explanation":"知识点：还原染料悬浮体稳定性。研磨后染料悬浮体需避光密闭保存防止颗粒聚集和光照变质，使用前搅拌保证均匀。B项敞口会引入灰尘和导致水分蒸发；C项高温会加速染料颗粒聚集；D项强光可能引起染料光解，均不正确。","tier":"进阶"},{"id":221,"type":"single","stem":"配制染液时用移液管量取浓酸，正确的操作是","options":["用洗耳球吸取并在通风柜内缓慢放液","用嘴直接吸上液面后迅速放液","把移液管插入酸瓶底部快速吸取","先把浓酸倒入烧杯再吸取以便观察"],"answer":[0],"explanation":"知识点：浓酸量取安全操作。必须用洗耳球在通风柜内操作防止吸入酸雾。B项用嘴吸极度危险；C项插入瓶底快速吸取易产生气泡和飞溅；D项预先倒出增加暴露面积和飞溅风险，均不规范。","tier":"进阶"},{"id":222,"type":"single","stem":"某化验室配制染液时发现配方中元明粉用量为30g/L，但实际浴比为1:20，若按1:10浴比配制同样浓度的染液，元明粉用量应调整为","options":["15g/L","30g/L","60g/L","45g/L"],"answer":[0],"explanation":"知识点：浴比与助剂浓度换算。元明粉用量按g/L表示时与浴比无关，但若按对织物重计算则需换算；题目中30g/L在1:10浴比下对应每千克织物用量为30×10=300g，1:20时为30×20=600g，若保持对织物重不变则1:10浴比下浓度应为600/10=60g/L；但若保持染液浓度不变则仍为30g/L。本题按保持对织物重相同计算，正确应为60g/L。","tier":"挑战"},{"id":223,"type":"single","stem":"配制染液时发现染料溶解后溶液中有少量不溶颗粒，正确的处理方式是","options":["用200目滤网过滤后再使用","直接倒入染缸中继续染色","加热到沸腾使颗粒溶解","加入少量碱促进颗粒溶解"],"answer":[0],"explanation":"知识点：染液净化。不溶颗粒会造成色点色斑，应过滤去除。B项直接使用会产生染斑；C项部分染料高温会分解或聚集而非溶解；D项加碱可能改变染浴pH影响工艺，不能解决不溶物问题。","tier":"挑战"},{"id":224,"type":"single","stem":"配制活性染料染液时，称取染料后先用少量冷水调成糊状，再加温水溶解，这一步的主要目的是","options":["防止染料结块难以溶解","提高染料的上染百分率","降低染料的直接性","减少元明粉用量"],"answer":[0],"explanation":"知识点：染化料溶解操作。染料先调糊可避免颗粒抱团结块，再加温水便于充分溶解。上染百分率由染料结构和工艺条件决定，不是调糊能提高；直接性是染料对纤维亲和力，与调糊无关；元明粉用量由染色深度和促染需要决定，与调糊无关。","tier":"进阶"},{"id":225,"type":"single","stem":"化验室配制染液时，用托盘天平称取染料，正确的操作是","options":["左盘放砝码右盘放染料","左盘放染料右盘放砝码","染料直接倒在托盘上称量","称量前先调零并放称量纸"],"answer":[3],"explanation":"知识点：天平称量基本操作。托盘天平使用前应调零并在盘上放称量纸或容器，避免染料腐蚀托盘和交叉污染。左物右码是正确规则，左盘放砝码右盘放染料正好颠倒；染料直接倒在托盘上会污染天平且难以转移。","tier":"进阶"},{"id":226,"type":"single","stem":"某化验室配制好一份染液后，发现液面有少量未溶染料颗粒悬浮，正确的处置是","options":["直接用于打样并延长染色时间","过滤后使用并记录实际浓度","加少量温水搅拌后立即使用","按原配方重新计算补加染料"],"answer":[1],"explanation":"知识点：染液配制质量控制。有未溶颗粒说明溶解不完全，过滤可去除颗粒避免色点，同时应按实际溶解情况记录浓度偏差。直接使用会因染料量不准导致色差；加温水搅拌未必能溶尽且改变浴比；重新计算补加会使浓度更混乱。","tier":"挑战"},{"id":227,"type":"single","stem":"配制分散染料染液时，染料需经研磨或使用已商品化的液体染料，其主要原因是","options":["分散染料水溶性差需以微粒分散","分散染料在高温下会分解","分散染料需要碱性条件溶解","分散染料必须与保险粉同浴"],"answer":[0],"explanation":"知识点：分散染料应用特性。分散染料难溶于水，靠分散剂以微小颗粒悬浮于染浴中上染。高温分解说法不准确，分散染料正是用于高温高压染色；碱性条件溶解是活性染料特性；保险粉同浴是还原清洗或剥色，不是溶解条件。","tier":"进阶"},{"id":228,"type":"single","stem":"配制染液时计算染料用量，已知织物重5kg、染色深度2%（owf）、染液浴比1:20，则所需染料质量为","options":["10g","50g","100g","200g"],"answer":[2],"explanation":"知识点：owf染料用量计算。染料用量=织物重×染色深度=5000g×2%=100g。10g是按0.2%算错；50g是按1%算错；200g是按4%算错，均混淆了百分比基数。","tier":"基础"},{"id":229,"type":"single","stem":"活性染料染棉时，染液中加入元明粉的主要作用是","options":["促进染料上染纤维","提高染料固色率","调节染液pH值","防止染料水解"],"answer":[0],"explanation":"知识点：活性染料染色中电解质作用。元明粉作为电解质可降低纤维表面负电荷与染料阴离子间的斥力，起促染作用。固色率主要由碱剂和固色条件决定；调pH靠碱剂；防水解也靠控制碱剂和温度，不是元明粉的功能。","tier":"基础"},{"id":230,"type":"single","stem":"配制还原染料染液时，加入保险粉和烧碱后进行还原溶解，正确的判断是","options":["染液呈黄色即为还原完全","染液呈隐色体颜色且澄清","染液有沉淀说明还原充分","染液温度越低还原越快"],"answer":[1],"explanation":"知识点：还原染料还原溶解。还原充分时染料变为可溶的隐色体，染液澄清并呈现隐色体特征颜色。呈黄色不能一概判断；有沉淀说明还原不完全或染料析出；还原反应通常需一定温度，温度过低还原慢且不完全。","tier":"进阶"},{"id":231,"type":"single","stem":"化验室打样时，按配方称好染料和助剂后，发现染液体积比要求多出10mL，正确的处理是","options":["直接按原浓度使用不再调整","按实际体积重新计算补加染料助剂","倒掉10mL染液后继续使用","延长染色时间弥补浓度偏差"],"answer":[1],"explanation":"知识点：染液浓度与浴比控制。体积偏大意味着浓度偏低，应按实际体积重新计算并补加染料和助剂，保证owf和浓度准确。直接使用会色浅；倒掉10mL会改变浴比且倒出的可能是上层清液；延长时间不能弥补浓度不足。","tier":"挑战"},{"id":232,"type":"single","stem":"某化验室配制染液时，将称量好的染料放在敞口烧杯中，用玻璃棒搅拌溶解后未加盖就放置过夜，第二天用于打样，最可能出现的问题是","options":["染液浓度因溶剂挥发而升高","染料发生水解或析出导致色光变化","助剂挥发使染液pH下降","染料被空气中氧气氧化成不溶物"],"answer":[1],"explanation":"知识点：染液配制后的存放。敞口放置过夜，水分蒸发、空气中CO2溶入或染料自身水解/析出，会造成浓度和色光变化。浓度升高只是可能之一但不如水解析出对色光影响典型；助剂挥发使pH下降说法不准确；染料被氧气氧化成不溶物并非普遍现象。","tier":"进阶"},{"id":233,"type":"multi","stem":"配制活性染料染液时，下列操作中有利于染料充分溶解和染液稳定的有","options":["先用少量冷水将染料调成无颗粒糊状","加入已溶解好的碱剂并充分搅拌","使用温水并控制温度不宜过高","溶解后立即加入元明粉并静置","将染料直接倒入沸腾染浴中搅拌"],"answer":[0,1,2],"explanation":"知识点：活性染料染液配制操作。先调糊、加碱剂搅拌、用温水控温都有利于溶解和稳定。溶解后立即加元明粉静置可能使染料盐析；直接倒入沸腾染浴易造成结块和局部浓度过高，均不利于溶解稳定。","tier":"挑战"},{"id":234,"type":"single","stem":"配制活性染料染液时，称取染料后先用少量温水调成浆状，再稀释至规定体积，这一步的主要作用是","options":["防止染料结块并便于均匀分散","提高染料的上染百分率","缩短染液升温所需的时间","降低染液表面张力以减少泡沫"],"answer":[0],"explanation":"知识点：活性染料溶解操作。染料粉体直接遇大量水易结团，先调浆再稀释可使颗粒充分润湿分散，故正确项对。提高上染率靠的是盐碱等工艺条件，与调浆无关；升温时间由加热设备决定；表面张力需靠匀染剂等助剂，调浆本身不改变表面张力。","tier":"基础"},{"id":235,"type":"single","stem":"化验室配制染液时，用分析天平称取染料，下列称量操作中正确的是","options":["称量前先校准天平并关好防风门再读数","称量时打开防风门以便随时添加染料","称量纸直接放在秤盘上不用去皮","称量完毕立即用手取走称量纸上的染料"],"answer":[0],"explanation":"知识点：分析天平使用规范。气流会影响称量结果，称量前校准并关闭防风门读数才能保证准确，故正确项对。开门称量会因气流波动导致读数不稳；称量纸不去皮会把纸重计入；用手取染料会带入汗渍和油脂污染样品。","tier":"挑战"},{"id":236,"type":"single","stem":"某活性染料配方中染料用量为对织物重2%（owf），现处理织物50 kg，需称取染料多少克","options":["100 g","500 g","1000 g","2500 g"],"answer":[2],"explanation":"知识点：owf用量换算。owf指染料质量对织物质量的百分数，50 kg×2%=1 kg=1000 g，故正确项对。100 g是按0.2%算错；500 g是按1%算错；2500 g是按5%算错。","tier":"基础"},{"id":237,"type":"single","stem":"配制分散染料染液时，常将染料与分散剂一同研磨或高速搅拌，其目的是","options":["使染料颗粒细化并稳定悬浮在染液中","使染料与纤维发生化学结合","提高染液的pH值以利于上染","增加染液的黏度防止沉淀"],"answer":[0],"explanation":"知识点：分散染料的应用形态。分散染料难溶于水，靠分散剂使颗粒细化并稳定悬浮，故正确项对。分散染料与纤维之间主要是物理作用而非化学结合；加分散剂不改变pH；增黏不是其目的，黏度过高反而不利渗透。","tier":"进阶"},{"id":238,"type":"single","stem":"用移液管吸取染液时，下列操作正确的是","options":["吸取前用待取染液润洗移液管内壁2至3次","吸取前用蒸馏水润洗移液管内壁即可","吸取时把移液管尖端插入容器底部吸取","放液时让染液自然流尽后用力吹出残留液"],"answer":[0],"explanation":"知识点：移液管使用规范。用待取液润洗可避免管内残留水稀释样品，故正确项对。只用蒸馏水润洗会稀释待取液；插入底部会吸取沉淀导致浓度偏差；普通移液管不应吹出残留液（除非标注吹出），否则体积偏大。","tier":"基础"},{"id":239,"type":"single","stem":"某染液配方要求加元明粉30 g/L，配制染液总体积为200 L，需称取元明粉多少千克","options":["3 kg","6 kg","0.6 kg","60 kg"],"answer":[1],"explanation":"知识点：g/L浓度换算。30 g/L×200 L=6000 g=6 kg，故正确项对。3 kg是按15 g/L算错；0.6 kg是单位换算错；60 kg是把结果放大了10倍。","tier":"基础"},{"id":240,"type":"single","stem":"配制染液时发现染料溶解后有少量不溶颗粒，下列处理方式最恰当的是","options":["过滤除去不溶颗粒后再使用染液","直接倒入染缸继续使用","加碱使不溶颗粒溶解后使用","加热到沸腾让颗粒全部溶解后使用"],"answer":[0],"explanation":"知识点：染液配制质量控制。不溶颗粒会造成色点和染色不匀，应过滤除去，故正确项对。直接使用会把颗粒带入织物形成色斑；加碱可能改变染液pH影响上染；盲目煮沸可能使部分染料水解或凝聚，反而更糟。","tier":"挑战"},{"id":241,"type":"single","stem":"活性染料染色中，加碱剂的主要作用是","options":["使染料与纤维发生固色反应","提高染料的溶解速度","降低染色温度节省能源","防止染液产生泡沫"],"answer":[0],"explanation":"知识点：活性染料固色机理。碱剂使纤维素纤维羟基电离，促进染料与纤维反应固色，故正确项对。染料溶解主要靠水温和搅拌；碱剂不降低染色温度；消泡需用消泡剂，与碱剂无关。","tier":"基础"},{"id":242,"type":"single","stem":"某车间配制染液时，操作工把称好的染料直接倒入满缸水中搅拌，结果出现大量结块，正确的改进做法是","options":["先用少量温水将染料调成均匀浆状再稀释","改用热水直接冲入染料中以加快溶解","延长搅拌时间让结块自然散开","减少加水量以提高染料浓度促进溶解"],"answer":[0],"explanation":"知识点：染料溶解操作。直接倒入大量水易使粉体表面润湿结团，先调浆再稀释可避免，故正确项对。热水直接冲入同样会使外层糊化结块；单纯延长搅拌难以打散已形成的团块；减少水量会使浓度过高更难分散。","tier":"挑战"},{"id":243,"type":"single","stem":"化验室按配方配好染液后，发现实际浓度比要求偏高，下列处置最合理的是","options":["按计算补加适量水并搅拌均匀后复测","直接按现有浓度使用不再调整","倒掉一半染液再加满水","加入少量染料使浓度更高以便稀释使用"],"answer":[0],"explanation":"知识点：染液浓度调整。浓度偏高应定量补水并复测确认，故正确项对。直接使用会造成上染过深；倒掉一半再加满水无法定量控制；再加染料会使偏差更大。","tier":"挑战"},{"id":244,"type":"multi","stem":"配制染液过程中，下列做法有助于保证配制结果准确的有","options":["称量前检查天平水平并校准","量取液体时视线与量筒凹液面最低处平齐","染料溶解后定容前先冷却至室温","配好的染液立即使用不标定浓度","用同一容器连续配制不同染料不清洗"],"answer":[0,1,2],"explanation":"知识点：染液配制准确性的控制要点。校准天平、正确读数、定容前冷却至室温均能减少误差，故前三项对。配好染液应标定浓度以确认；不同染料共用未清洗容器会交叉污染，均不正确。","tier":"进阶"},{"id":245,"type":"single","stem":"配制活性染料染液时，化料水温一般宜控制在多少范围，既能助溶又不致染料过早水解","options":["20~30℃","40~50℃","60~70℃","80~90℃"],"answer":[1],"explanation":"活性染料化料常用40~50℃温水助溶，温度过高会加速活性基水解。20~30℃溶解慢但安全，60~70℃已明显促进水解，80~90℃水解严重。","tier":"基础"},{"id":246,"type":"single","stem":"用托盘天平称取5g染料时，下列操作顺序中正确的是","options":["先放砝码后放染料，称完先取染料","先调零再放称量纸，去皮后加染料至平衡","直接用手取砝码，称量纸可省略","先加染料再调零，读数时为染料质量"],"answer":[1],"explanation":"称量前应先调平零点，放称量纸去皮后加料。先放砝码后调零读数会错，用手直接拿砝码会污染腐蚀砝码，省略称量纸会污染天平。","tier":"进阶"},{"id":247,"type":"single","stem":"配制染液时需将母液稀释10倍，若母液浓度为20g/L，稀释后浓度应为","options":["0.5g/L","1g/L","2g/L","5g/L"],"answer":[2],"explanation":"稀释10倍即浓度除以10，20g/L÷10=2g/L。0.5g/L是稀释40倍，1g/L是稀释20倍，5g/L是稀释4倍，属计算方向记错。","tier":"进阶"},{"id":248,"type":"single","stem":"化料时染料结块难以溶解，下列处理方式中最合理的是","options":["用少量温水调成糊状再稀释溶解","直接倒入染缸靠高温长时间化开","加冷水浸泡后静置过夜","加入少量保险粉助溶后过滤"],"answer":[0],"explanation":"先用少量温水调糊再稀释是标准化料方法，可防止结块。直接倒缸易产生色点，冷水浸泡效率低，加保险粉会改变染浴还原性影响染色。","tier":"进阶"},{"id":249,"type":"single","stem":"化验室配制酸性染料染液时，通常使用哪种介质溶解染料并调节pH","options":["纯碱溶液","醋酸溶液","烧碱溶液","双氧水"],"answer":[1],"explanation":"酸性染料在酸性浴中上染，常用醋酸调pH。纯碱和烧碱为碱性，会使酸性染料上染受阻；双氧水是漂白剂，不用于调pH。","tier":"进阶"},{"id":250,"type":"single","stem":"称量染料时发现天平零点漂移，正确的下一步操作是","options":["直接称量，读数时扣除漂移量","重新调零校准后再称量","更换称量纸后继续称量","把砝码放在另一侧再称"],"answer":[1],"explanation":"零点漂移必须重新调零校准，否则所有读数都带系统误差。扣除漂移量无法准确修正，换纸或换侧不能消除零点偏移。","tier":"挑战"},{"id":251,"type":"single","stem":"某染液配方要求元明粉用量为染料质量的10倍，染料称取2.5g，元明粉应称取","options":["2.5g","10g","25g","250g"],"answer":[2],"explanation":"10倍即2.5g×10=25g。2.5g是未乘倍数，10g是误按4倍，250g是误按100倍，都属倍数理解错误。","tier":"基础"},{"id":252,"type":"single","stem":"化验室配制染液时，量取浓硫酸应选用的器皿是","options":["量筒","烧杯","移液管","容量瓶"],"answer":[2],"explanation":"浓硫酸量取应使用移液管或滴定管，便于准确量取且安全。量筒精度低，烧杯无法准确量取，容量瓶用于定容不用于量取。","tier":"基础"},{"id":253,"type":"single","stem":"某车间配制染液时发现称取的染料比配方多出0.3g，正确的处置是","options":["直接按实际称量配制并记录","倒掉多余染料继续称量至配方值","补加溶剂稀释到原浓度","补加其他助剂平衡用量"],"answer":[0],"explanation":"实际称量后应按实际值调整配方并记录，保证可追溯。倒掉多余会造成浪费和误差累积，补溶剂或助剂会改变染浴组成。","tier":"挑战"},{"id":254,"type":"single","stem":"化验室配制活性染料染液时，称取染料前对天平应做的首要操作是","options":["开机预热后直接放置称量纸清零","用砝码校验后不放称量纸直接称样","先放称量纸再按去皮键清零后称样","先放称量纸再读取纸重并手动扣除"],"answer":[2],"explanation":"知识点为电子天平称量规范。活性染料称量需先放置容器（称量纸）再去皮清零，保证读数即净样重。A项未预热稳定且未去皮，读数含纸重；B项染料直接接触秤盘会污染且腐蚀天平；D项手动扣纸重易因纸吸潮导致误差且操作繁琐，不如去皮准确。","tier":"进阶"},{"id":255,"type":"single","stem":"配制酸性染料染浴时，处方要求加入元明粉10 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L或将体积比搞反；D项直接照搬体积数值，均属单位混淆。","tier":"基础"},{"id":256,"type":"single","stem":"分散染料化料时，正确的化料水温控制原则是","options":["先用冷水打浆再升温至规定温度搅拌","直接倒入沸腾水中高速搅拌至全溶","用60℃热水化开后立即加入染缸","先用冷水打浆后静置冷却再过滤使用"],"answer":[0],"explanation":"知识点为分散染料化料程序。分散染料需先用冷水或温水打浆分散，再升温搅拌使其均匀悬浮。B项直接沸水易使染料结块凝聚；C项化开后不经过滤直接入缸易带颗粒造成色点；D项静置冷却不搅拌无法保证分散均匀，均不符合化料要求。","tier":"进阶"},{"id":257,"type":"single","stem":"活性染料染棉时处方中加纯碱的主要作用是","options":["调节染浴pH促使染料与纤维固色","络合水中金属离子防止色斑","提高染料溶解度防止凝聚","增加染液黏度改善匀染性"],"answer":[0],"explanation":"知识点为活性染料固色碱剂作用。纯碱提供碱性条件使纤维素羟基离子化，促进染料与纤维共价结合。B项络合金属离子是螯合剂的作用；C项助溶是尿素等的作用；D项增稠是增稠剂的功效，均与纯碱主要作用不符。","tier":"基础"},{"id":258,"type":"single","stem":"配制还原染料隐色体染液时，保险粉加入后染液应呈现的状态是","options":["澄清透明的黄绿色或橙红色液","浑浊带大量未溶颗粒的悬浮液","表面浮有油膜的分层液","乳白色均匀的胶体溶液"],"answer":[0],"explanation":"知识点为还原染料隐色体特征。保险粉在碱性条件下将还原染料还原为可溶的隐色体钠盐，染液呈澄清透明并带特征色泽。B项说明还原不充分或染料未溶；C项油膜说明前处理带油污；D项乳白胶体不是隐色体的正常状态。","tier":"进阶"},{"id":259,"type":"single","stem":"称量少量染料时发现天平读数持续缓慢漂移，正确的处置是","options":["关好防风门待稳定后重新清零称量","用手按住秤盘待读数稳定再称","加大称样量使漂移相对影响减小","反复按去皮键直至读数不再变化"],"answer":[0],"explanation":"知识点为称量异常判断。读数漂移多因气流、震动或未稳定引起，应关防风门待稳定后重新清零。B项手按秤盘引入外力导致错误读数；C项加大称量量不能解决漂移本质问题；D项反复去皮会引入累积误差，均不能正确处置。","tier":"挑战"},{"id":260,"type":"single","stem":"化验室用移液管吸取染液后，正确的放液操作是","options":["管尖靠容器内壁自然流尽后停留15秒","用力吹出管尖残留最后一滴液体","快速甩动移液管使液体全部排出","放液时管尖悬空不接触容器内壁"],"answer":[0],"explanation":"知识点为移液管操作规范。标准做法是管尖贴壁自然流尽并停留约15秒，保证量取体积准确。B项吹出残留液会超出标称体积；C项甩动无法控制且易溅失；D项悬空放液易挂壁残留，均影响移液精度。","tier":"进阶"},{"id":261,"type":"single","stem":"染色车间发现同一处方配制的染液染色后颜色比标准样偏浅，化验室复核配方无误，应优先排查的环节是","options":["染料实际称量是否因天平未校准确认偏少","染色温度是否比工艺规定偏低","染色时间是否比工艺规定偏短","染缸浴比是否比工艺规定偏大"],"answer":[0],"explanation":"知识点为色浅异常的排查顺序。配方无误而颜色偏浅，首先应怀疑称量误差，因天平未校准会导致实际投料不足。B、C、D项虽也可能影响上染率，但配方复核无误前提下称量是配制环节最直接的变量，应优先排查。","tier":"挑战"},{"id":262,"type":"single","stem":"配制阳离子染料染液时，为防止染料凝聚，常加入的助剂是","options":["醋酸与匀染剂","纯碱与元明粉","保险粉与烧碱","双氧水与稳定剂"],"answer":[0],"explanation":"知识点为阳离子染料化料助剂。阳离子染料在酸性条件下溶解稳定，常加醋酸调pH并配匀染剂缓染。B项纯碱为碱性会使阳离子染料析出，元明粉是阴离子电解质易引起凝聚；C项保险粉烧碱用于还原染料；D项双氧水用于漂白，均不适用。","tier":"基础"},{"id":263,"type":"single","stem":"化验室配制标准染液时，用于准确量取小体积液体（如5 mL）的器皿应选","options":["5 mL单标线移液管","50 mL量筒","10 mL刻度离心管","100 mL烧杯"],"answer":[0],"explanation":"知识点为量器选择。小体积精确量取应选与体积匹配的单标线移液管，精度最高。B项50 mL量筒最小分度大，量5 mL误差大；C项刻度离心管精度低于移液管；D项烧杯无精确刻度，不能用于定量量取。","tier":"进阶"},{"id":264,"type":"single","stem":"某化验员配制活性染料染液时，将染料用热水化开后未冷却即加入染缸，最可能造成的质量问题是","options":["染料提前固色导致色花或色渍","染料溶解度下降出现沉淀","染液pH急剧升高","纤维强力大幅下降"],"answer":[0],"explanation":"知识点为活性染料化料温度控制。活性染料热水化开且未冷却直接入缸，在高温碱性条件下会提前与纤维反应，造成色花、色渍。B项高温通常提高溶解度而非降低；C项pH由碱剂决定与温度无关；D项强力下降是强碱高温长时间作用的结果，非此操作直接后果。","tier":"进阶"},{"id":265,"type":"multi","stem":"关于染化料配制过程中的安全与规范操作，下列做法正确的有","options":["称量粉末染料时佩戴口罩并在通风柜内操作","配制强碱溶液时将碱缓慢加入水中并搅拌","用嘴吸移液管吸取有毒染液样品","染液配制记录中注明染料批号与配制日期","剩余染料随手倒回原染料瓶中"],"answer":[0,1,3],"explanation":"知识点为染化料配制安全规范。A项防粉尘吸入是基本防护；B项碱入水并搅拌可防剧烈放热飞溅；D项记录批号与日期便于追溯，均为正确做法。C项用嘴吸移液管会吸入有毒染液，必须用洗耳球；E项剩余染料倒回原瓶会污染整瓶染料，均应禁止。","tier":"进阶"},{"id":266,"type":"single","stem":"配制活性染料染液时，称取染料后先加少量冷水调成浆状再加温水溶解，这样做的主要目的是","options":["防止染料结块并便于均匀溶解","提高染料的上染百分率","降低染料的水解速率","减少元明粉的用量"],"answer":[0],"explanation":"知识点为染料溶解操作。活性染料直接加温水易结块包心，先调浆可使颗粒润湿分散，再加温水即均匀溶解，故A对；上染百分率由染料亲和力与工艺条件决定，调浆不改变，B错；水解速率取决于pH与温度，调浆不直接影响，C错；元明粉用量由染色深度决定，与调浆无关，D错。","tier":"进阶"},{"id":267,"type":"single","stem":"化验室配制酸性染料染液时，正确的溶解操作顺序是","options":["先用冷水调浆，再用热水稀释至规定体积","直接用沸水冲入染料中并剧烈搅拌","先加元明粉助溶，再加热水稀释","先加冰醋酸调pH，再撒入染料粉末"],"answer":[0],"explanation":"知识点为染料溶解程序。先冷水调浆润湿、再热水稀释可避免结块，A对；直接沸水冲入易使染料表面糊化包心，B错；元明粉是促染剂不是助溶剂，先加会影响溶解，C错；先调酸再加粉易使染料在酸性下凝聚，D错。","tier":"进阶"},{"id":268,"type":"single","stem":"配制染液时用托盘天平称取2.5 g染料，天平游码读数为2 g刻度加0.5 g刻度，若将游码误读为2 g加0.05 g，则实际称量偏差为","options":["少称约0.45 g","多称约0.45 g","少称约0.05 g","多称约0.05 g"],"answer":[0],"explanation":"知识点为天平读数。应称2.5 g，误读为2.05 g，实际少称0.45 g，A对；B方向相反，C、D把0.5与0.05混淆，均错。","tier":"进阶"},{"id":269,"type":"single","stem":"某染液配方要求染料用量2%（owf），织物重500 kg，则需称取染料","options":["10 kg","5 kg","1 kg","100 kg"],"answer":[0],"explanation":"知识点为owf用量计算。2%×500 kg=10 kg，A对；5 kg按1%算错，B错；1 kg按0.2%算错，C错；100 kg按20%算错，D错。","tier":"基础"},{"id":270,"type":"single","stem":"配制染液时，将染料用少量水调浆后加入已升温至60 ℃的染浴中，发现染液中有细小颗粒未溶，最合理的下一步处置是","options":["降温后过滤并重新调浆溶解","继续升温至沸并高速搅拌","补加元明粉促使颗粒沉降","直接按原液用于染色"],"answer":[0],"explanation":"知识点为溶解不良处置。未溶颗粒应降温过滤、重新调浆再溶，避免色点，A对；继续升温可能使颗粒外层糊化更难溶，B错；元明粉无沉降溶解作用，C错；直接使用会造成色斑，D错。","tier":"挑战"},{"id":271,"type":"single","stem":"化验室配制染液时，母液浓度通常以g/L表示，若称取5 g染料定容至500 mL，则该母液浓度为","options":["10 g/L","5 g/L","2.5 g/L","1 g/L"],"answer":[0],"explanation":"知识点为浓度计算。5 g/0.5 L=10 g/L，A对；5 g/L按1 L算错，B错；2.5 g/L与1 g/L均计算错误，C、D错。","tier":"进阶"},{"id":272,"type":"single","stem":"配制染液时，将浓硫酸稀释的正确操作是","options":["将浓硫酸沿器壁缓慢加入水中并搅拌","将水缓慢加入浓硫酸中并搅拌","将浓硫酸与水同时倒入容器中","将浓硫酸快速倒入热水中"],"answer":[0],"explanation":"知识点为浓硫酸稀释。酸入水并搅拌可及时散热，A对；水入酸会局部剧烈放热飞溅，B错；同时倒入无法控制放热，C错；快速倒入热水更危险，D错。","tier":"基础"},{"id":273,"type":"single","stem":"某化验室配制染液时发现染料母液放置两天后出现分层，上层清液下层沉淀，正确的处置是","options":["摇匀后重新测定浓度再使用","直接取上层清液使用","直接取下层沉淀使用","加热至沸使沉淀溶解后使用"],"answer":[0],"explanation":"知识点为母液稳定性。分层说明分散或溶解体系不稳定，应摇匀并复测浓度，A对；只取上层或下层浓度均不准，B、C错；加热可能破坏染料，D错。","tier":"挑战"},{"id":274,"type":"single","stem":"配制染液时，用电子天平称取0.050 g染料，下列做法能提高称量准确度的是","options":["先称容器质量再增量法加入染料","直接用手拿取染料粉末","在天平未水平时称量","称量时打开天平防风门"],"answer":[0],"explanation":"知识点为微量称量。增量法可减少转移损失，A对；手拿取污染且不准，B错；未水平称量有系统误差，C错；开门有气流影响读数，D错。","tier":"进阶"},{"id":275,"type":"single","stem":"配制活性染料染液时，称取染料后需要先用少量冷水调成浆状再稀释，这一操作的主要目的是什么？","options":["防止染料结块并便于均匀分散","提高染料在纤维上的上染百分率","降低染料水解速率以免失效","减少称量过程中染料的飞散损失"],"answer":[0],"explanation":"知识点：染料溶解操作要点。活性染料直接加大量水容易外层先溶、内层抱团形成难溶疙瘩，先调浆可使颗粒充分润湿分散，故A对；上染百分率由染料亲和力和工艺条件决定，调浆不改变上染率，B错；调浆是物理分散过程，不改变水解速率，C错；调浆发生在称量之后，与称量飞散无关，D错。","tier":"基础"},{"id":276,"type":"single","stem":"化验室配制染液时需将配方中占织物重2%（owf）的染料配成500 mL染液，已知称取染料10 g，若按浴比1:20、织物重500 g计算，该配方实际染料用量应为多少？","options":["10 g","20 g","5 g","2.5 g"],"answer":[0],"explanation":"知识点：owf用量计算。织物重500 g，2% owf即500×2%=10 g，故A对；20 g是按4% owf算的结果，B错；5 g是按1% owf算的结果，C错；2.5 g是按0.5% owf算的结果，D错。","tier":"基础"},{"id":277,"type":"single","stem":"配制分散染料染液时，染料难溶于水需借助分散剂研磨成悬浮体，下列哪种做法符合分散染料化料要求？","options":["用50℃左右温水将染料调浆后缓慢稀释","用沸水直接冲入染料中并剧烈搅拌","将染料与元明粉干混后加冷水溶解","先用酒精溶解染料再加水稀释"],"answer":[0],"explanation":"知识点：分散染料化料方法。分散染料靠分散剂悬浮，用温水调浆再稀释可避免颗粒凝聚，故A对；沸水直冲会使分散剂失效、染料凝聚，B错；元明粉是促染剂不是分散剂，干混冷水无法形成稳定悬浮体，C错；酒精溶解适用于部分油溶性染料，分散染料用酒精会造成颗粒析出，D错。","tier":"进阶"},{"id":278,"type":"single","stem":"某化验室配制酸性染料染锦纶的染液，配方要求用醋酸调节pH至4~5，操作工发现pH计显示6.5，下列补加酸的做法中最合理的是？","options":["将醋酸稀释后缓慢滴加并随时测pH","直接倒入浓醋酸再搅匀后测pH","换用硫酸代替醋酸快速降pH","加热染液使pH自然下降"],"answer":[0],"explanation":"知识点：染液pH调节操作。稀释后缓慢滴加可防止局部过酸并便于精确控制，故A对；直接倒浓酸易造成局部pH过低使染料聚集，B错；硫酸酸性强且影响染浴离子组成，锦纶染色常用醋酸缓冲体系，C错；加热不能使pH按需下降，反而影响染料上染，D错。","tier":"挑战"},{"id":279,"type":"single","stem":"活性染料染棉时，配方中元明粉的主要作用是什么？","options":["促染，提高染料上染率","固色，使染料与纤维结合","匀染，减缓染料上染速度","软化，降低水中钙镁离子"],"answer":[0],"explanation":"知识点：活性染料染色助剂作用。元明粉（硫酸钠）通过盐效应降低染料与纤维间电荷斥力起促染作用，故A对；固色靠碱剂使染料与纤维反应，B错；匀染靠匀染剂或控制升温，C错；软化水靠软水剂如六偏磷酸钠，D错。","tier":"基础"},{"id":280,"type":"single","stem":"配制还原染料悬浮体染液时，下列哪种助剂需要在研磨前加入以帮助染料颗粒分散稳定？","options":["分散剂","保险粉","烧碱","元明粉"],"answer":[0],"explanation":"知识点：还原染料悬浮体化料。分散剂在研磨前加入可包覆颗粒防止团聚，故A对；保险粉和烧碱是染色时还原溶解用的，研磨阶段加入会提前反应，B、C错；元明粉在此不起分散作用，D错。","tier":"进阶"},{"id":281,"type":"single","stem":"化验室配制染液时，用移液管量取母液后需将移液管尖端残留液吹入容器，这一做法是否正确？","options":["不正确，移液管残留液不应吹入","正确，可减少量取误差","正确，母液浓度高不能浪费","不正确，应改用容量瓶量取"],"answer":[0],"explanation":"知识点：移液管使用规范。标准移液管标定容量已包含自然流尽后的残留量，吹入会使实际量取体积偏大，故A对；吹入会引入正误差，B错；是否浪费与计量准确性无关，C错；容量瓶用于定容不用于量取转移，D错。","tier":"进阶"},{"id":282,"type":"single","stem":"配制染液时发现染料母液中有少量不溶颗粒，下列处理方式最恰当的是？","options":["过滤后再按浓度折算使用","搅匀后直接量取使用","静置后取上层清液使用","加热使其全部溶解后使用"],"answer":[0],"explanation":"知识点：母液使用前处理。过滤可去除不溶物并按实际浓度折算保证配方准确，故A对；直接量取会使染料量不准且颗粒沾污织物，B错；静置取上层会使浓度偏低且不溶物仍存在，C错；加热可能使染料分解或仍不溶，D错。","tier":"挑战"},{"id":283,"type":"single","stem":"某操作工配制活性染料染液时先将染料与纯碱一起加入水中搅拌，再升温至60℃染色，结果上染率明显偏低，最可能的原因是？","options":["碱使染料提前水解，降低固色率","碱使染料凝聚，无法上染","温度过高使染料升华","染料与碱反应生成沉淀"],"answer":[0],"explanation":"知识点：活性染料加碱时机。活性染料在碱性条件下与纤维反应的同时也会水解，先加碱再升温会使大量染料水解失去固色能力，故A对；碱不会使活性染料凝聚，B错；活性染料不升华，C错；碱与活性染料一般不生成沉淀，D错。","tier":"进阶"},{"id":284,"type":"single","stem":"化验室配制染液时，电子天平显示称量值跳动不稳，下列做法中最合理的是？","options":["关好防风罩门并稳定后再读数","用手按住秤盘待数字稳定","直接取跳动中间值记录","换用托盘天平称量"],"answer":[0],"explanation":"知识点：电子天平使用。气流和振动是读数不稳主因，关防风罩可稳定，故A对；手按住秤盘会引入外力使读数错误，B错；取中间值无依据，C错；托盘天平精度低不适用于染化料称量，D错。","tier":"挑战"},{"id":285,"type":"single","stem":"某化验室配制染液时，操作工将同一支移液管先量取A染料母液、再用自来水冲洗后量取B染料母液，下列评价正确的是？","options":["冲洗不彻底会交叉沾污，应用对应母液润洗","自来水冲洗即可，不影响后续量取","两支母液颜色相近，可不必冲洗","冲洗后应烘干再使用，防止稀释"],"answer":[0],"explanation":"知识点：移液管防交叉污染。自来水冲洗残留水会稀释母液且可能残留A染料，应用待量取母液润洗，故A对；自来水冲洗不能消除残留且引入水，B错；颜色相近不代表成分相同，C错；烘干不现实且不能解决残留污染问题，D错。","tier":"进阶"},{"id":286,"type":"multi","stem":"配制染液时，下列哪些操作有助于保证配方浓度的准确性？","options":["称量前校准电子天平并预热","母液配制后定容并记录实际浓度","量取时视线与移液管刻度线保持水平","染料母液长期敞口存放便于随时取用","称量染料时使用同一张称量纸累计多种染料"],"answer":[0,1,2],"explanation":"知识点：染液配制准确度控制。天平校准预热保证称量准确，A对；定容并记录实际浓度便于折算，B对；视线水平读数可避免视差，C对；敞口存放会吸湿或挥发使浓度变化，D错；同一称量纸累计多种染料会交叉沾污且残留影响称量，E错。","tier":"进阶"},{"id":287,"type":"single","stem":"某化验室配制分散染料染液时发现染料颗粒始终悬浮在水面无法润湿下沉，最可能的原因是","options":["染料表面张力大且缺少润湿剂","染料粒径过大已发生团聚","水温过低导致染料结晶析出","染液pH值偏离工艺范围"],"answer":[0],"explanation":"知识点：分散染料的润湿与分散。分散染料疏水性强，若不加润湿剂，粉体表面张力大，会浮在水面，故A对。B粒径大主要影响上染均匀性和过滤性，不是浮于水面的主因；C水温低影响溶解度和上染速率，不直接导致浮面；D pH偏离影响色光和稳定性，与润湿浮面无关。","tier":"挑战"},{"id":288,"type":"single","stem":"配制酸性染料染液时，化验室常用的溶解顺序是","options":["先用冷水调糊，再用热水稀释","先用热水溶解，再补冷水定容","先加元明粉，再撒入染料","先调pH，再缓慢加入染料"],"answer":[0],"explanation":"知识点：酸性染料溶解操作。酸性染料先用冷水调成糊状再加热水稀释，可防止结块和局部浓度过高，故A对。B直接用热水容易使染料外层速溶包住内层形成疙瘩；C元明粉是促染剂，先加会使染料溶解困难；D先调pH再投染料并非溶解顺序的关键，且可能造成染料凝聚。","tier":"进阶"},{"id":289,"type":"single","stem":"某染色车间需要配制含固量为2%的染液500 kg，应称取染料多少千克","options":["5 kg","10 kg","20 kg","25 kg"],"answer":[1],"explanation":"知识点：染液浓度计算。含固量2%即染料质量占染液总质量的2%，500 kg×2%=10 kg，故B对。A是1%的计算结果；C是4%的计算结果；D是5%的计算结果。","tier":"基础"},{"id":290,"type":"single","stem":"配制染液时发现配方要求加入匀染剂，但化验室现有匀染剂浓度与配方标注浓度不同，正确的处理方式是","options":["按配方标注量直接称取","按有效浓度换算后称取","先按标注量减半称取试用","用同体积的同类匀染剂替代"],"answer":[1],"explanation":"知识点：助剂有效浓度换算。配方标注量通常按标准浓度计，实际助剂浓度不同时必须按有效成分换算，故B对。A直接称取会导致实际有效成分偏差；C减半没有换算依据；D同体积替代忽略了浓度差异，可能过量或不足。","tier":"挑战"},{"id":291,"type":"single","stem":"活性染料染液配制后放置时间过长会导致上染率下降，其原因是","options":["染料发生水解失去反应性","染料被空气中的氧气氧化","染液pH值逐渐升高","染料发生聚集沉淀"],"answer":[0],"explanation":"知识点：活性染料的水解。活性染料在碱性条件下会与水反应水解，失去与纤维反应的能力，故A对。B活性染料氧化不是主要问题；C放置过程中pH一般不会自行升高；D聚集沉淀会影响均匀性，但上染率下降的主因是水解。","tier":"进阶"},{"id":292,"type":"single","stem":"化验室配制还原染料悬浮体染液时，染料需要经过研磨，研磨的主要目的是","options":["使染料粒径减小到规定范围","提高染料的还原电位","增加染料在碱液中的溶解度","使染料由隐色体转为悬浮体"],"answer":[0],"explanation":"知识点：还原染料悬浮体染色。悬浮体染色要求染料颗粒足够细且分布均匀，研磨使粒径减小到规定范围，故A对。B还原电位由还原剂和碱决定，与研磨无关；C还原染料本身不溶于水，研磨不增加溶解度；D悬浮体是染料颗粒分散在液体中，不是由隐色体转来。","tier":"进阶"},{"id":293,"type":"single","stem":"在染色车间，配制好的染液需要从化验室送到车间使用，正确的做法是","options":["标明染料名称、浓度、配制时间后加盖运送","用敞口容器快速送到车间避免沉淀","配制后立即倒入车间染缸无需标识","用同一容器连续运送不同染液以提高效率"],"answer":[0],"explanation":"知识点：染液标识与运送管理。染液必须标明名称、浓度、配制时间并加盖，防止混淆和污染，故A对。B敞口运送易混入杂质且可能溅出；C无标识容易造成染液混用；D同一容器连续运送不同染液会造成交叉污染。","tier":"挑战"},{"id":294,"type":"single","stem":"某化验室按配方配制染液时，发现称取的染料质量比配方要求多出5%，正确的处置方式是","options":["按实际质量重新计算其余组分用量","把多余的染料从容器中取出丢弃","直接加水稀释到原定体积","忽略偏差继续按原配方配制"],"answer":[0],"explanation":"知识点：配方偏差处理。染料多称后应按实际质量重新计算其他组分，保证各组分比例正确，故A对。B从容器中取出难以准确且可能污染；C只稀释体积会改变所有组分浓度比例；D忽略偏差会导致配方比例失准。","tier":"挑战"},{"id":295,"type":"single","stem":"某化验室配制染液时，发现配方中元明粉用量为30 g/L，实际染液体积为2 L，但化验员按每升30 g加入后只加了1.5 L水，此时染液浓度会","options":["偏高，因为水量不足","偏低，因为元明粉过量","不变，因为元明粉按体积加","偏高，因为元明粉不足"],"answer":[0],"explanation":"知识点：浓度与体积关系。元明粉按30 g/L加，若实际水量只有1.5 L，则元明粉总量按2 L计算会偏多，浓度偏高，故A对。B水量不足不会使浓度偏低；C浓度按体积加也需要正确体积；D元明粉是按2 L加，不会不足。","tier":"挑战"},{"id":296,"type":"single","stem":"配制活性染料染液时，称取染料后需先用少量冷水调成糊状再加水稀释，这一操作的主要目的是","options":["防止染料飞扬并避免结块难溶","缩短染料与纤维的反应时间","提高染液对织物的渗透速率","降低染料水解导致的色光偏差"],"answer":[0],"explanation":"知识点：染料溶解操作。活性染料粉状直接遇大量水易结块且粉尘飞扬，先调糊可润湿均匀。缩短反应时间靠加碱和温度控制，不是调糊目的；渗透靠匀染剂和温度；水解受碱和温度影响，与调糊无直接因果。","tier":"进阶"},{"id":297,"type":"single","stem":"某化验室配制1:20浴比的染液，称取织物5.0 g，按浴比计算应量取的水量为","options":["50 mL","100 mL","200 mL","500 mL"],"answer":[1],"explanation":"知识点：浴比计算。浴比1:20表示织物质量与染液体积之比为1:20，5.0 g×20=100 mL。50 mL对应1:10，200 mL对应1:40，500 mL对应1:100，均为浴比概念混淆。","tier":"进阶"},{"id":298,"type":"single","stem":"配制还原染料悬浮体染液时，通常需要加入分散剂，其作用是","options":["使染料颗粒稳定悬浮防止聚集沉降","将还原染料预先还原成隐色体","降低染液表面张力以利渗透","络合水中金属离子防止色变"],"answer":[0],"explanation":"知识点：还原染料悬浮体配制。分散剂使疏水性染料微粒稳定悬浮、防止凝聚。预先还原需保险粉和碱；降低表面张力是渗透剂作用；络合金属离子是螯合剂作用，三者功能不同。","tier":"基础"},{"id":299,"type":"single","stem":"用电子天平称量染料时，若天平水平泡偏离中心，最可能造成的后果是","options":["称量结果偏大或偏小且重复性变差","天平显示屏背光变暗无法读数","称量速度明显加快导致读数不稳","天平自动归零功能失效无法去皮"],"answer":[0],"explanation":"知识点：天平使用条件。天平不水平时重力分量导致示值偏差，且每次放置位置不同结果不一致。背光、归零、称量速度由电路和程序控制，与水平状态无直接关系。","tier":"进阶"},{"id":300,"type":"single","stem":"配制酸性染料染液时，用醋酸调节pH至4~5，若误用碳酸钠代替醋酸，染液pH将","options":["升高，不利于酸性染料上染","降低，促进染料与纤维结合","不变，碳酸钠仅起缓冲作用","先升高后降低，最终与醋酸一致"],"answer":[0],"explanation":"知识点：酸碱调节剂辨析。碳酸钠为碱性物质，会使染液pH升高，酸性染料在碱性条件下上染率下降。碳酸钠不是缓冲剂也不会先升后降，更不会促进酸性染料上染。","tier":"进阶"}]}