{"name":"船舶水手题库","level":"初级 / 中级 / 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面应用不锈钢刷或专用工具除锈，并涂铝专用底漆以防止电化学腐蚀；钢刷会嵌入铁屑引起铝的腐蚀；铜丝刷同样会引入异种金属；防污漆用于船底防生物附着，不适用于上层建筑表面。","tier":"基础"},{"id":19,"type":"single","stem":"某船在靠泊时，船首缆绳已带上缆桩，此时船舶仍有向前冲势，值班水手正确的处置是","options":["立即松开船首缆让其溜出","通知驾驶台并保持缆绳受力观察","迅速加带一根船首缆","将缆绳从缆桩上解下改带倒缆"],"answer":[1],"explanation":"知识点：系泊异常处置。船首缆已带上而船舶仍有前冲势，缆绳可能承受过大张力，正确做法是通知驾驶台并保持观察，由驾驶台用车舵配合控制；立即松缆会让船失控前冲；加带船首缆不能解决前冲造成的过载；解下改带倒缆在受力状态下操作极其危险且会失去控制。","tier":"挑战"},{"id":20,"type":"multi","stem":"船舶在甲板进行缆绳作业时，下列做法正确的有","options":["作业前检查缆绳有无磨损断股","站在缆绳外圈一侧操作绞缆机","缆绳受力时用手直接调整缆绳位置","作业时佩戴防滑手套并穿工作鞋","缆绳带好后继续收绞至完全绷紧"],"answer":[0,1,3],"explanation":"知识点：缆绳作业安全规范。作业前检查缆绳磨损断股可预防断缆事故；站在外圈一侧可避免被缆绳带入卷筒；佩戴防滑手套穿工作鞋是基本防护；缆绳受力时用手直接调整位置极易造成手部绞伤，应使用工具或停止受力后调整；缆绳带好后继续收绞至完全绷紧会造成过载断缆。","tier":"进阶"},{"id":21,"type":"single","stem":"内河船舶靠泊带缆时，将缆绳从绞缆机卷筒上松出后，正确的盘缆方式是","options":["按顺时针方向盘成圆形，每圈压在上一圈下面","沿甲板面呈S形来回折叠堆放，绳头朝外","盘成椭圆形并留出绳头，每圈相互压住","顺缆绳捻向盘成圆形，绳头压在盘绳下方"],"answer":[3],"explanation":"知识点：缆绳盘放应顺捻向、绳头压住，便于随时抛放。顺捻向盘放可防止扭结；A项逆捻向盘放易产生扭结；B项S形折叠会导致受力时卡死；C项椭圆形盘放不利于快速松出。","tier":"进阶"},{"id":22,"type":"single","stem":"船舶靠泊过程中听到驾驶台发出“右满舵”口令，舵工复述后应","options":["立即将舵轮向右转到底并报出实际舵角","先回正舵再向右转到底并报出舵角","将舵轮向右转到计划舵角后稳住","向右转舵至满舵位置后等待进一步指令"],"answer":[0],"explanation":"知识点：舵令执行要求复述、执行、回令。听到满舵令应立即转到底并报出实际舵角；B项先回正舵延误时机；C项转到计划舵角不符合满舵令要求；D项只转不报违反回令程序。","tier":"基础"},{"id":23,"type":"single","stem":"甲板日常维护中，对钢质甲板面锈蚀区域进行除锈后首道油漆应涂","options":["面漆以覆盖锈迹防止扩散","防锈底漆以隔绝水分和氧气","清漆以保持金属原有外观","防滑漆以增加甲板摩擦系数"],"answer":[1],"explanation":"知识点：钢质甲板除锈后应先涂防锈底漆。底漆能隔绝水分和氧气防止再生锈；A项面漆直接涂在裸钢上附着力差；C项清漆无防锈功能；D项防滑漆属面漆类不能替代底漆。","tier":"基础"},{"id":24,"type":"single","stem":"船舶在码头绞缆时，缆绳受力突然发出“嘎嘎”声并伴有轻微抖动，值班水手正确的处置是","options":["继续绞缆直至缆绳绷紧到位","立即停止绞缆并通知相关人员检查","降低绞缆速度继续观察","用手触摸缆绳判断受力程度"],"answer":[1],"explanation":"知识点：缆绳异常声响和抖动可能是断缆前兆。应立即停止绞缆并通知检查；A项继续绞缆可能导致断缆伤人；C项降速仍可能断缆；D项用手触摸受力缆绳极易造成割伤。","tier":"挑战"},{"id":25,"type":"single","stem":"内河船舶航行中，驾驶台下达“左舵二十”口令，舵工复述后正确的操作顺序是","options":["转舵至左二十后报“左二十”","转舵至左二十后报“左舵二十到”","转舵到位后先看舵角指示器再回令","转舵至左二十后等驾驶台确认再回令"],"answer":[1],"explanation":"知识点：舵令执行应复述、转舵、回令。回令标准格式为舵令加“到”；A项回令不完整；C项应转舵同时观察舵角指示器，不是转完再看；D项等待确认延误回令。","tier":"基础"},{"id":26,"type":"single","stem":"沿海船舶在涌浪较大的锚地放缆时，为防止缆绳与船体摩擦，应在导缆孔处","options":["垫上帆布或旧轮胎等防磨衬垫","涂抹黄油以减少缆绳摩擦","将缆绳直接系在栏杆上","用铁丝将缆绳固定在导缆孔边缘"],"answer":[0],"explanation":"知识点：导缆孔处应加防磨衬垫保护缆绳。帆布或旧轮胎可有效减少磨损；B项黄油不能防止摩擦且污染缆绳；C项栏杆强度不足；D项铁丝固定会勒伤缆绳。","tier":"进阶"},{"id":27,"type":"single","stem":"船舶系泊时，缆绳在系缆桩上正确系法应遵循的原则是","options":["先绕一圈再打多个半结固定","采用八字形绕桩后末端用细绳绑扎","顺缆绳受力方向绕桩数圈后压住绳头","在桩上打一个死结防止滑脱"],"answer":[2],"explanation":"知识点：缆绳系桩应顺受力方向绕数圈并压住绳头。这样受力越大越紧且易解；A项半结受力后难解；B项八字绕桩不适用于系缆桩；D项死结受力后无法快速解开。","tier":"基础"},{"id":28,"type":"single","stem":"船舶在航行中发现甲板排水孔被杂物堵塞，值班水手正确的处置是","options":["用铁棍直接捅开排水孔","清除杂物后检查排水孔滤网是否完好","用高压水枪从外侧向舱内冲洗","暂时用木塞堵住待靠泊后处理"],"answer":[1],"explanation":"知识点：排水孔堵塞应清除杂物并检查滤网。滤网完好可防止再次堵塞；A项铁棍易损坏排水孔；C项反向冲洗会把杂物冲入舱内；D项堵住排水孔会导致甲板积水。","tier":"进阶"},{"id":29,"type":"single","stem":"船舶靠泊后，值班水手在调整缆绳时发现一根缆绳受力明显大于其他缆绳，正确做法是","options":["立即将该缆绳松出使各缆受力均匀","将该缆绳再收紧以固定船位","保持现状待驾驶员统一调整","将该缆绳从系缆桩上解下重新系固"],"answer":[0],"explanation":"知识点：各缆绳受力应均匀。受力过大的缆绳应适当松出；B项继续收紧可能导致断缆；C项不处理会使该缆受力持续增大；D项解下重系会造成船位瞬间失控。","tier":"挑战"},{"id":30,"type":"single","stem":"船舶在码头进行甲板除锈作业时，水手使用电动除锈工具的正确安全做法是","options":["戴好防护眼镜和手套后开始作业","单手操作工具另一手扶住甲板","在工具运转时更换除锈刷头","将电缆拖过积水区域使用"],"answer":[0],"explanation":"知识点：电动除锈须戴防护眼镜和手套。B项单手操作易失控；C项运转中更换刷头会伤人；D项电缆过积水有触电危险。","tier":"进阶"},{"id":31,"type":"single","stem":"船舶在航行中接到驾驶台“把定”口令，舵工正确的操作是","options":["将舵轮回到正舵位置并报“正舵”","保持当前舵角不变并报“把定”","将舵轮向相反方向转至正舵","稳住当前航向并报“航向稳定”"],"answer":[0],"explanation":"知识点：“把定”口令要求舵工将舵回正使船舶稳定在当前航向。A项回正舵并回令正确；B项保持舵角船会继续偏转；C项反舵会向另一侧偏转；D项未回舵无法稳定航向。","tier":"基础"},{"id":32,"type":"multi","stem":"船舶在码头系泊期间需要调整缆绳，下列做法中正确的有","options":["调整前先通知驾驶台并确认无人在缆绳受力方向","松缆时缓慢松出并随时观察缆绳受力变化","收缆时一次收紧到位再检查各缆受力","调整完毕后将缆绳在系缆桩上系牢并整理剩余缆绳","调整时将缆绳从导缆孔中抽出直接用手拉拽"],"answer":[0,1,3],"explanation":"知识点：调整缆绳应通知驾驶台、缓慢操作、系牢整理。A项通知驾驶台可协调安全；B项缓慢松出可控制受力；D项系牢整理是收尾要求；C项一次收紧到位易使缆绳受力过大；E项从导缆孔抽出用手拉拽既费力又不安全。","tier":"挑战"},{"id":33,"type":"single","stem":"在码头解缆时，尾缆已从缆桩上解下，此时缆绳应如何处置最安全？","options":["直接松手让缆绳自由滑入水中","由一人快速全部抛入江中","先收回缆绳盘好再示意解缆完成","留一圈在缆桩上待船离开后自行脱落"],"answer":[2],"explanation":"知识点：解缆作业程序。正确项先收缆盘好可防止缆绳缠螺旋桨或绊人。直接松手入水易缠绕车叶；快速抛入江中同样造成乱缆和落水隐患；留一圈待自行脱落属于失控操作，缆头可能甩伤人员。","tier":"进阶"},{"id":34,"type":"single","stem":"听到驾驶台发出「右满舵」口令后，舵工复述并开始操舵，此时正确做法是？","options":["复述后立即将舵轮快速转至右满舵并回报舵角","先问清是右舵还是右满舵再操舵","复述后缓慢转舵待船头开始右转再回舵","复述后把舵轮转到右舵15度观察船头反应"],"answer":[0],"explanation":"知识点：舵令执行。正确项复述、快转至满舵、回报舵角是标准程序。先问清会延误操舵时机；缓慢转舵待船头反应不符合满舵要求；只转15度属于擅自改变舵角，均属错误执行。","tier":"挑战"},{"id":35,"type":"single","stem":"甲板日常维护中，发现钢质甲板局部出现片状锈蚀但尚未减薄，最恰当的处理方式是？","options":["直接刷两遍面漆覆盖锈斑","敲铲除锈至露出金属光泽后涂防锈漆","用淡水冲洗后涂一层防锈漆","待锈蚀面积扩大后统一处理"],"answer":[1],"explanation":"知识点：甲板除锈涂装工艺。正确项必须除锈至金属光泽再涂防锈漆才能附着。直接刷面漆覆盖会继续锈蚀；仅冲洗涂漆附着力差；待扩大再处理会加速结构损耗。","tier":"挑战"},{"id":36,"type":"single","stem":"靠泊过程中，船首缆绳受力突然增大并发出响声，值班水手首先应当？","options":["立即松出缆绳减小受力","通知驾驶台并观察缆绳受力及磨损情况","迅速解掉该缆改用另一根缆","用手直接按住缆绳感受受力大小"],"answer":[1],"explanation":"知识点：缆绳异常受力处置。正确项通知驾驶台并观察，便于统一指挥。擅自松缆可能使船位偏移；擅自解缆改缆破坏系泊方案；手按受力缆绳极易被弹伤。","tier":"挑战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偏转；继续右舵会加剧偏转；改为左满舵超出指令要求，可能造成过度偏转。"},{"id":199,"type":"multi","stem":"船舶在码头进行甲板维护时，下列属于缆绳作业安全要求的有","options":["作业人员应避开缆绳受力方向","缆绳磨损超标应及时更换","绞缆时可用手直接引导缆绳入槽","系缆桩附近应保持通道畅通","缆绳受力时可在绳上跨越通行"],"answer":[0,1,3],"explanation":"知识点是缆绳作业安全要求。避开受力方向、磨损超标更换、系缆桩附近通道畅通均正确；用手直接引导缆绳入槽易被卷入夹伤；缆绳受力时跨越通行易被弹伤或绊倒。"},{"id":200,"type":"single","stem":"船舶靠泊时缆绳从缆桩上受力后出现轻微滑移，值班水手首先应做的处置是","options":["在受力缆绳上再加一道同向挽桩","用脚踩住缆绳防止继续滑出","在缆绳上再绕一道反向挽桩","立即松掉该缆绳改换另一根"],"answer":[2],"explanation":"知识点是缆绳挽桩受力后的防滑处置。正确项：反向加挽一道可增大摩擦并压住滑移，是标准做法。错误项A同向加挽不改变受力方向，滑移仍会继续；错误项B用脚踩缆绳属危险动作且无法制止滑移；错误项D直接松缆会使船失去控制，属于错误处置。"},{"id":201,"type":"single","stem":"内河船舶靠泊时通常先带的首缆作用是","options":["控制船首向外偏转并拢住船首","控制船尾向外偏转并拢住船尾","使船身整体平行贴靠码头","防止船舶前后移动并定位船位"],"answer":[0],"explanation":"知识点是各缆绳的功能。正确项：首缆从船首向前带出，能控制船首外偏并拢住船首。错误项B是尾缆的作用；错误项C是横缆的作用；错误项D是倒缆的主要作用。"},{"id":202,"type":"single","stem":"舵工听到“把定”舵令后，正确的操作是","options":["将舵角回零并保持当前航向","将舵角回零并保持当前航速","将舵角向相反方向压满","将舵角保持在当前角度不动"],"answer":[0],"explanation":"知识点是“把定”舵令的含义。正确项：把定是使船舶稳定在当前航向，需回舵至零并稳住航向。错误项B混淆了航速与航向，把定不管航速；错误项C是压反舵的操法，与把定无关；错误项D保持舵角会使船继续偏转。"},{"id":203,"type":"single","stem":"甲板消防皮龙使用后正确的保养做法是","options":["带压盘卷后存入消防箱","冲洗晾干后盘卷存放","涂油后折叠平放舱内","原样挂回消防栓旁"],"answer":[1],"explanation":"知识点是消防皮龙的日常维护。正确项：冲洗去盐去污并晾干后盘卷，可防霉防粘。错误项A带压盘卷易使内层受潮发霉；错误项C涂油会腐蚀橡胶并影响使用；错误项D原样挂回不冲洗会积盐结垢。"},{"id":204,"type":"single","stem":"钢丝缆绳使用后出现局部扭结（俗称“打结”）时，正确的处置是","options":["继续使用并加强观察","用锤敲直后继续使用","将扭结段截去重新插接","涂油理顺后继续使用"],"answer":[2],"explanation":"知识点是钢丝缆绳损伤处置。正确项：扭结处钢丝已产生塑性变形，强度下降，应截去并重新插接。错误项A继续使用会在受力时断裂；错误项B敲直无法恢复内部结构强度；错误项D涂油只能防锈，不能修复扭结。"},{"id":205,"type":"single","stem":"船舶靠泊过程中，值班水手在缆绳受力方向附近站位时，正确的安全做法是","options":["站在缆绳受力方向的内侧","站在缆绳外侧并远离缆绳","站在缆桩正后方观察","站在缆绳上跨过去处理"],"answer":[1],"explanation":"知识点是缆绳作业安全站位。正确项：应站在缆绳外侧并远离受力缆绳，防止缆绳断裂回弹伤人。错误项A站在受力方向内侧正处回弹区；错误项C缆桩后方同样在缆绳回弹范围；错误项D跨越缆绳属危险动作。"},{"id":206,"type":"single","stem":"内河船舶在码头边进行甲板除锈作业时，为防止锈渣和污水落入水中，正确的做法是","options":["在作业区下方铺设防护布并收集锈渣","用高压水枪将锈渣直接冲入江中","在舷边加装挡板任锈渣落入水中","将除锈污水直接排入江中稀释"],"answer":[0],"explanation":"知识点是甲板作业防污染。正确项：铺设防护布并收集锈渣，防止落入水体。错误项B、C、D均使锈渣或污水进入水体，不符合防污染要求。"},{"id":207,"type":"single","stem":"船舶在航行中发现甲板一处栏杆立柱根部锈蚀严重、摇动明显，值班水手正确的处置是","options":["用铁丝临时绑扎后继续航行","拍照记录并报告大副安排修理","用油漆覆盖锈蚀部位后继续使用","自行割除该立柱以免晃动"],"answer":[1],"explanation":"知识点是甲板结构缺陷的报告程序。正确项：发现结构缺陷应记录并报告大副安排修理。错误项A铁丝绑扎不能恢复强度；错误项C油漆覆盖掩盖缺陷；错误项D擅自割除会破坏栏杆结构。"},{"id":208,"type":"single","stem":"船舶系泊时使用尼龙缆，其较钢丝缆的显著特点是","options":["弹性大、受力后伸长明显","刚性大、几乎不伸长","耐磨损能力优于钢丝缆","耐高温性能优于钢丝缆"],"answer":[0],"explanation":"知识点是缆绳材质特性。正确项：尼龙缆弹性大，受力后伸长明显，能缓冲。错误项B是钢丝缆的特点；错误项C尼龙缆耐磨损不如钢丝缆；错误项D尼龙缆耐高温性能也不如钢丝缆。"},{"id":209,"type":"single","stem":"船舶靠泊带缆时，撇缆绳抛出后未到达码头，正确的处置是","options":["立即收紧撇缆绳重新抛出","将撇缆绳收回重新盘好后抛出","用主机推力使船靠近码头","将撇缆绳系在缆桩上等待"],"answer":[1],"explanation":"知识点是撇缆作业程序。正确项：未到达应收回重新盘好再抛，保证下次抛出顺利。错误项A直接收紧无法使绳头到位；错误项C靠主机推力靠近码头属危险操作；错误项D系在缆桩上无法完成带缆。"},{"id":210,"type":"multi","stem":"船舶在码头进行甲板维护保养时，下列做法中符合安全与防污染要求的有","options":["使用防护布收集除锈产生的锈渣","将废油漆桶集中回收交岸处理","用江水直接冲洗甲板油污入江","在舷边设置挡板收集冲洗水","将废棉纱随手丢入江中"],"answer":[0,1,3],"explanation":"知识点是甲板维护的安全与防污染要求。正确项A、B、D分别做到收集锈渣、回收废桶、收集冲洗水，符合要求。错误项C用江水冲洗油污入江会造成污染；错误项E将废棉纱丢入江中同样污染水体。"},{"id":211,"type":"single","stem":"绞收缆绳时，缆绳在卷筒上出现压缆（上层缆压住下层缆）现象，正确的处理方式是","options":["继续绞收，压缆会自动理顺","停止绞收，松出后重新盘缆","加大绞收速度让缆绳弹开","用手在卷筒处拨正缆绳"],"answer":[1],"explanation":"知识点为绞缆机操作与缆绳排列。压缆会使松缆时缆绳抽出困难甚至卡死，正确做法是停绞松出重新盘缆。继续绞收会使压缆更紧，不能自动理顺；加大速度更危险且不能消除压缆；用手在运转卷筒处拨缆属于危险操作，易造成手部卷入。"},{"id":212,"type":"single","stem":"听到舵令“左舵二十”后，舵工应复述并执行，正确的复述内容是","options":["左舵二十","左二十","舵左二十","二十度左"],"answer":[0],"explanation":"知识点为舵令的标准复述规范。标准舵令复述应与口令完全一致，即“左舵二十”。其余说法虽方向相近，但不是标准舵令用语，容易在嘈杂环境或与引航员配合时产生歧义。"},{"id":213,"type":"single","stem":"船舶在狭窄水道航行，舵工听到“把定”口令后，正确的操作含义是","options":["立即将舵回到零位并保持","保持当前航向不变","将舵向相反方向压满","减速后稳住船位"],"answer":[1],"explanation":"知识点为舵令“把定”的含义。“把定”是要求舵工维持船舶当前航向，发现偏航及时用小舵角修正。回到零位只是其中一种手段，若船已偏航则不能达到把定目的；压满反舵会造成航向大幅摆动；减速与把定不是同一概念。"},{"id":214,"type":"single","stem":"甲板日常维护中，对钢质甲板出现锈蚀的区域进行除锈后，下一步应","options":["直接涂面漆覆盖","先涂防锈底漆再涂面漆","用水冲洗后即可","涂润滑油防锈"],"answer":[1],"explanation":"知识点为甲板除锈涂装程序。除锈后金属表面裸露，应先涂防锈底漆再涂面漆，才能形成有效防腐层。直接涂面漆附着力差易脱落；仅用水冲洗不能防锈；润滑油不属于甲板防腐涂装材料。"},{"id":215,"type":"single","stem":"使用撇缆绳向码头传递缆绳时，撇缆绳的撇出方向应","options":["尽量水平撇向码头","朝码头方向略向上撇出","垂直向上撇出","朝码头方向略向下撇出"],"answer":[1],"explanation":"知识点为撇缆操作。朝目标方向略向上撇出可借助抛物线和重力让撇缆头落到码头合适位置。水平撇出距离不足易中途落水；垂直向上撇出不能到达码头；向下撇出会直接砸向水面或岸边，难以传递。"},{"id":216,"type":"single","stem":"舵工在操舵时发现舵角指示器读数与下达舵令不符，首先应","options":["继续操舵等读数自动恢复","报告驾驶员或值班人员","自行调整舵机液压","反复左右打舵测试"],"answer":[1],"explanation":"知识点为操舵异常处置。舵角指示与指令不符属于设备或传动异常，应立即报告驾驶台由值班人员判断处置。继续操舵可能造成航向失控；自行调整液压超出水手职责且有风险；反复打舵可能加剧故障。"},{"id":217,"type":"single","stem":"在码头带缆时，若缆绳需要绕过导缆孔和系缆桩，为减少磨损，正确做法是","options":["缆绳直接压在缆桩边缘","在缆绳与导缆孔接触处加装衬垫","将缆绳打结固定在缆桩上","把缆绳绕在栏杆上临时受力"],"answer":[1],"explanation":"知识点为缆绳防磨损措施。在导缆孔、缆桩等接触处加装衬垫可减小摩擦、延长缆绳寿命。直接压在缆桩边缘会割伤缆绳；打结固定不利于受力且难解开；栏杆不是受力构件，绕栏杆受力可能拉坏栏杆并造成事故。"},{"id":218,"type":"single","stem":"船舶靠泊过程中，首缆已经带上桩，此时尾缆尚未带妥，值班水手发现船尾正在缓慢向外偏转，正确的处置是","options":["立即收紧首缆把船拉回","建议驾驶台用车舵配合并加快带尾缆","松开首缆让船自然靠拢","等待船尾自行靠回码头"],"answer":[1],"explanation":"知识点为靠泊中缆绳与车舵配合。首缆已带而尾缆未妥时船尾外偏，应通过车舵调整并尽快带妥尾缆控制船尾。只收紧首缆会加剧船首贴靠、船尾外偏；松首缆会失去控制；等待自行靠回不现实且可能碰撞。"},{"id":219,"type":"single","stem":"甲板保养中，对活动部件如铰链、螺栓进行润滑时，正确的做法是","options":["先清除表面锈污再加注润滑脂","直接加注润滑脂覆盖锈层","用水冲洗后不擦干即加注","只在部件卡死时才加注"],"answer":[0],"explanation":"知识点为甲板活动部件润滑保养。应先除锈清洁再加注润滑脂，润滑脂才能附着并起作用。直接覆盖锈层润滑效果差；带水加注会降低润滑效果并加速锈蚀；等到卡死才加注属于失养，已可能造成部件损坏。"},{"id":220,"type":"single","stem":"在强流区域靠泊，缆绳已受力，此时驾驶台通知“松尾缆”，水手正确的操作是","options":["快速全部解掉尾缆","缓慢松出并观察缆绳受力","先收紧再突然松出","直接砍断缆绳应急"],"answer":[1],"explanation":"知识点为缆绳松出操作。应缓慢松出并观察受力，防止缆绳突然受力断裂或船舶失控。快速全解会失去控制；先紧后突然松出会造成冲击载荷；砍断缆绳属极端危险且不可取。"},{"id":221,"type":"multi","stem":"下列属于舵令执行中正确做法的有","options":["听到舵令后先复述再操舵","操舵中发现航向偏离及时小舵角修正","舵令不清时按自己理解先操作","执行完毕后报告实际舵角","把定后航向稳定即可不再监视"],"answer":[0,1,3],"explanation":"知识点为舵令执行程序。复述后操舵、及时小舵角修正、执行后报告舵角均为正确做法。舵令不清时应询问确认而非自行理解操作；把定后仍需持续监视航向并修正，不能放任不管。"},{"id":222,"type":"single","stem":"船舶靠泊后，水手在缆桩上做“8”字形挽缆时，最后一圈的正确处理方式是","options":["将缆绳末端压在上一圈下方并收紧","将缆绳末端从最后一圈上方穿过后收紧","将缆绳末端打一个半结固定","将缆绳末端在缆桩上再绕两圈后收紧"],"answer":[0],"explanation":"知识点是缆桩挽缆的收尾方法。正确项将末端压在上一圈下方，受力时越拉越紧、松缆方便。错误项从上方穿过后受力易松脱；半结在缆桩上受力后难解开且不是标准挽法；再绕两圈只是增加摩擦，并未完成压缆收尾。"},{"id":223,"type":"single","stem":"值班水手听到“左舵十”舵令后，正确的复诵和操舵动作是","options":["复诵“左舵十”，将舵轮向左转至十度并报“十度左”","复诵“左舵十”，将舵轮向左转到底并报“左满舵”","复诵“左舵十”，将舵轮向右转至十度并报“十度右”","复诵“左舵十”，等舵角指示器到十度后停舵不报"],"answer":[0],"explanation":"知识点是舵令复诵与操舵程序。正确项复诵后将舵轮转向左至十度并回报实际舵角。错误项转到底变成左满舵，与十度不符；向右转为反舵；到十度后不回报，违反操舵后必须回报舵角的程序。"},{"id":224,"type":"single","stem":"内河船舶在码头绞缆时，操作人员应站立的正确位置是","options":["缆绳内圈一侧，便于观察缆绳走向","缆绳外圈一侧，远离缆绳受力弹回方向","缆桩正后方，便于用力拉缆","绞缆机滚筒正前方，便于控制缆绳"],"answer":[1],"explanation":"知识点是缆绳作业的站位安全。正确项站在缆绳外圈一侧，避开缆绳断裂回弹方向。错误项内圈一侧正处回弹区域；缆桩正后方受力时缆绳易弹起；滚筒正前方易被卷入或缆绳弹伤。"},{"id":225,"type":"single","stem":"船舶在靠泊过程中需要“溜缆”，水手正确的操作是","options":["完全松开刹车让缆绳自由溜出","控制刹车使缆绳缓慢受力溜出","将缆绳从绞缆机上全部解下","用人力拉住缆绳控制溜出速度"],"answer":[1],"explanation":"知识点是溜缆的含义与操作。正确项通过控制刹车使缆绳缓慢受力溜出，调节船舶靠拢速度。错误项完全松开刹车使缆绳失控；全部解下失去控制；人力拉住缆绳无法承受拉力且极易伤人。"},{"id":226,"type":"single","stem":"船舶在航行中发现舵机失灵，操舵水手首先应做的是","options":["立即报告驾驶台并保持原舵角","立即将舵轮转至另一侧尝试","立即离开操舵位置去机舱查看","立即改用应急操舵装置"],"answer":[0],"explanation":"知识点是舵机失灵时的应急程序。正确项先报告驾驶台并保持原舵角，便于驾驶台判断和采取措施。错误项擅自转另一侧可能加剧危险；离开操舵位置中断操舵；未经指令直接改应急操舵可能造成混乱。"},{"id":227,"type":"single","stem":"水手在甲板保养时使用电动砂轮机，正确的操作是","options":["戴防护眼镜和手套，砂轮片朝向远离身体一侧","戴棉纱手套，砂轮片朝向身体一侧便于观察","不戴防护眼镜，以便看清打磨位置","戴防护眼镜，但拆除砂轮机防护罩以便操作"],"answer":[0],"explanation":"知识点是电动砂轮机安全操作。正确项戴防护眼镜和手套，砂轮片朝向远离身体一侧，防止飞屑伤人。错误项砂轮片朝向身体一侧易被飞屑击伤；不戴防护眼镜易伤眼；拆除防护罩违反安全操作。"},{"id":228,"type":"single","stem":"船舶系泊时，水手在撇缆作业中正确的做法是","options":["撇缆前先整理撇缆绳，防止缠绕并提醒周围人员","撇缆时将撇缆绳随意堆放，快速抛出","撇缆时站在缆绳正前方用力抛出","撇缆前不检查撇缆头是否牢固"],"answer":[0],"explanation":"知识点是撇缆作业的安全准备。正确项先整理撇缆绳、提醒周围人员，防止缠绕和伤人。错误项随意堆放易缠绕；站在缆绳正前方易被绊倒或击伤；不检查撇缆头可能抛出后脱落伤人。"},{"id":229,"type":"single","stem":"水手在甲板进行敲锈作业时，对敲锈锤的正确使用方法是","options":["握紧锤柄，锤头朝向远离身体方向，注意周围人员","握紧锤柄，锤头朝向身体方向便于用力","单手轻握锤柄，快速连续敲击","锤柄沾油后继续使用以防滑脱"],"answer":[0],"explanation":"知识点是敲锈锤的安全使用。正确项握紧锤柄、锤头朝外并注意周围人员，防止敲伤和飞屑伤人。错误项锤头朝身体方向易敲伤自己；单手轻握快速敲击易脱手；锤柄沾油更易滑脱。"},{"id":230,"type":"single","stem":"船舶在靠离码头时，水手听到“解缆”口令后，正确的操作顺序是","options":["先解倒缆，再解横缆，最后解头缆","先解头缆，再解横缆，最后解倒缆","先解横缆，再解倒缆，最后解头缆","先解尾缆，再解倒缆，最后解横缆"],"answer":[0],"explanation":"知识点是解缆顺序。正确项先解倒缆、再解横缆、最后解头缆，保持船舶受控。错误项先解头缆易使船首失控；先解横缆易使船体横移；先解尾缆易使船尾失控。"},{"id":231,"type":"single","stem":"在绞缆机滚筒上收绞尼龙缆时，缆绳在滚筒上应保持的正确状态是","options":["缆绳在滚筒上排列整齐且保持有张力","缆绳在滚筒上随意叠压防止打滑","缆绳在滚筒上绕满多层以增加摩擦","缆绳在滚筒上松绕一圈便于随时放出"],"answer":[0],"explanation":"知识点为绞缆机操作。缆绳受力时应在滚筒上排列整齐并保持张力，才能避免突然松动或陷缆。随意叠压会在受力时互相嵌入造成卡缆；绕满多层会使上层缆绳被下层压死难以放出；松绕一圈无法建立有效摩擦，受力时会滑脱。"},{"id":232,"type":"single","stem":"船舶靠泊时撇缆绳牵引缆绳上岸，撇缆绳与缆绳的连接处应位于","options":["缆绳琵琶头前端的短索段","缆绳中段便于受力的位置","缆绳琵琶头与撇缆绳打结相连","缆绳末端用卸扣固定撇缆绳"],"answer":[0],"explanation":"知识点为撇缆作业。撇缆绳应系在缆绳琵琶头前方的短索（引缆）上，使缆绳受力点正确且便于解脱。系在缆绳中段会导致缆绳受力方向错误；把撇缆绳直接打在琵琶头上受力后难以解开；用卸扣固定会因受力无法快速脱开，均不符合实际撇缆程序。"},{"id":233,"type":"single","stem":"听到舵令“左舵十”后，正确的回舵时机是","options":["舵叶转到左十度时立即回舵","舵叶转到左十度时先稳舵再报告","舵叶转到左二十度时回舵","舵叶转到左满舵时回舵"],"answer":[1],"explanation":"知识点为舵令执行。“左舵十”指舵叶转到左十度并保持，应立即稳住舵并报告，而不是立即回舵。立即回舵会把舵叶转回零位，等于没有执行舵令；转到左二十度或左满舵都超出了指令角度，属于操舵错误。"},{"id":234,"type":"single","stem":"在甲板除锈作业中，敲锈锤与钢丝刷配合使用的主要目的是","options":["先用锤击碎厚锈再刷除疏松锈层","先用刷除浮锈再锤击坚硬锈块","先用锤敲出毛面再刷防锈漆","先用刷清理焊缝再锤击氧化皮"],"answer":[0],"explanation":"知识点为甲板维护除锈程序。厚锈块先用敲锈锤击碎，再用钢丝刷清除疏松锈层和锈粉，为涂漆提供清洁基面。先刷后锤会因锈层过厚刷不动；敲毛面用于涂漆前处理而非除锈主要步骤；清理焊缝与氧化皮属于局部处理，不是二者配合的主要目的。"},{"id":235,"type":"single","stem":"缆绳在系缆桩上挽桩时，正确的方法是","options":["先绕一圈再以八字形挽牢并留出尾端","直接以单套结固定在桩上","绕桩后把尾端压在受力缆下方","绕桩两圈后打平结收尾"],"answer":[0],"explanation":"知识点为系缆桩挽桩。正确做法是先绕一圈建立摩擦，再以八字形交错挽牢，并留出尾端便于随时松解。单套结受力后难以解开；尾端压在受力缆下方会被压死无法解脱；平结用于连接两根同径绳索，不适合作为系缆桩固定结。"},{"id":236,"type":"single","stem":"内河船舶在急流中靠泊时，若首缆先受力而尾缆尚未带妥，最可能发生的危险是","options":["船首被压向码头而船尾甩开","船尾被压向码头而船首甩开","船体平行贴靠码头无偏转","船首尾同时受力后向河心漂移"],"answer":[0],"explanation":"知识点为靠泊缆受力分析。首缆先受力时，水流对船尾的推力会使船尾向下游甩开、船首被压向码头，形成偏转危险。船尾被压向码头是尾缆先受力的结果；平行贴靠需首尾缆均匀受力；向河心漂移与首缆受力方向不符。"},{"id":237,"type":"single","stem":"钢丝缆在使用中出现“鸟笼”状扭结，正确的处置是","options":["停止受力并沿扭结反向退扭整理","继续受力拉直使扭结自行消失","用锤敲击扭结部位使其松散","在扭结处切掉后重新插接"],"answer":[0],"explanation":"知识点为钢丝缆扭结处置。出现鸟笼状扭结说明内部股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