{"name":"渔业船舶职务船员证书题库","level":"一级、二级、三级、四级、五级","org":"农业农村部门（渔业渔政管理局）","count":300,"questions":[{"id":1,"type":"single","stem":"渔船在狭水道内追越他船时，追越船应当从被追越船的哪一侧通过","options":["被追越船的左舷","被追越船的右舷","被追越船的正横方向","被追越船船首正前方"],"answer":[0],"explanation":"知识点为狭水道追越的基本规则。正确项：狭水道内追越应尽量从被追越船左舷通过，便于双方避让协调。错误项：右舷通过会增加对遇风险；正横方向不是追越路径；船首正前方属于横越态势而非追越。","tier":"基础"},{"id":2,"type":"single","stem":"渔船主机在航行中出现滑油压力突然下降并伴随油温升高，轮机长首先应当采取的措施是","options":["立即加大油门维持航速","先降速并检查滑油系统","直接打开海水冷却阀降温","记录数据待返港后处理"],"answer":[1],"explanation":"知识点为轮机异常判断与应急处置。正确项：滑油压力骤降加温升提示润滑失效风险，应先降速并检查系统。错误项：加大油门会加剧磨损；开海水阀只处理冷却不解决压力；记录待返港会扩大故障。","tier":"挑战"},{"id":3,"type":"single","stem":"渔船在港内靠泊时，船长指令大副在船首撇缆，大副应当选择撇缆的抛投方向为","options":["码头上游侧方向","码头下游侧方向","码头正横方向","任意方便的方向"],"answer":[2],"explanation":"知识点为靠泊撇缆操作。正确项：应朝码头正横方向抛投，便于受力均匀和后续带缆。错误项：上下游方向受水流影响大；任意方向不符合操作规范，易造成缆绳受力不均。","tier":"进阶"},{"id":4,"type":"single","stem":"渔船在航行中舵机失灵，船长决定应急操舵，此时应当优先采用的方式是","options":["立即抛锚制动","使用应急舵机操舵","通知机舱停车漂航","用主机转速差转向"],"answer":[1],"explanation":"知识点为舵机失灵应急程序。正确项：应优先切换应急舵机维持操舵能力。错误项：抛锚在深水或高速时危险；停车漂航会失去控制；主机差速转向是辅助手段而非首要。","tier":"挑战"},{"id":5,"type":"single","stem":"渔船在雾航中雷达发现正前方有回波，但肉眼未见到目标，此时正确的做法是","options":["维持原速继续航行","立即向右转向避让","减速并鸣放雾号加强瞭望","加速通过回波区域"],"answer":[2],"explanation":"知识点为雾航避碰。正确项：应减速、鸣雾号并加强瞭望，确认目标动态。错误项：维持原速风险大；盲目右转可能加剧危险；加速通过更不可取。","tier":"挑战"},{"id":6,"type":"single","stem":"渔船在起网作业中，船员发现网具被海底障碍物挂住，此时正确的处置是","options":["立即加大主机功率强行拖拽","先停车并尝试反向缓慢解脱","直接切断网具放弃","保持航向继续拖网"],"answer":[1],"explanation":"知识点为渔捞作业异常处置。正确项：应停车并尝试反向缓慢解脱，避免设备损坏。错误项：强行拖拽会损坏网具和主机；直接切断损失大；继续拖网会加剧挂底。","tier":"挑战"},{"id":7,"type":"single","stem":"渔船在航行中需要穿越他船船首时，作为穿越船应当","options":["保持航向和航速","加速抢过他船船首","从他船船尾后方通过","鸣笛示意他船让路"],"answer":[2],"explanation":"知识点为交叉相遇局面中的穿越船义务。正确项：穿越船应避免穿越他船船首，通常从他船船尾后方通过。错误项：保向保速不适用于穿越船主动穿越；加速抢越违规；鸣笛示意他船让路不符合让路义务。","tier":"基础"},{"id":8,"type":"single","stem":"渔船在主机运转时，轮机员发现冷却水出口温度持续偏高，首先应当检查的项目是","options":["燃油滤器是否堵塞","海水泵和冷却水管路","主机转速是否过高","舵机液压油位"],"answer":[1],"explanation":"知识点为冷却系统故障排查。正确项：出口温度偏高应优先检查海水泵和冷却水管路。错误项：燃油滤器影响供油；转速过高是结果之一；舵机液压与冷却无关。","tier":"挑战"},{"id":9,"type":"single","stem":"渔船在海上遇到他船遇险信号时，作为附近船舶的船长应当","options":["保持原航向继续作业","立即改向前往救助","先报告公司再决定","等待海事部门指令"],"answer":[1],"explanation":"知识点为海上救助义务。正确项：附近船舶应立即改向前往救助。错误项：继续作业违背救助义务；先报告公司延误时机；等待指令不符合及时救助原则。","tier":"进阶"},{"id":10,"type":"single","stem":"渔业船舶在狭水道中航行时，为减小船舶偏转、保持航向稳定，船长通常应采用的操舵方式是","options":["在航道中心线附近小角度频繁修正","靠近航道一侧边缘航行以减少会船","把定航向不动舵让船舶自行稳定","在弯道前提前大角度压舵通过"],"answer":[0],"explanation":"知识点为狭水道操船中航向保持。狭水道中应尽量保持在航道中心线附近并以小角度频繁修正，以抵消岸吸、岸推和浅水效应。靠近一侧边缘会加剧岸吸与偏转；把定不动舵无法抵消外界扰动；弯道前大角度压舵会造成偏转过大甚至触岸。","tier":"基础"},{"id":11,"type":"single","stem":"渔业船舶主机在寒冷季节启动前，轮机长要求先进行暖机的主要目的是","options":["提高燃油黏度以改善雾化","减小各运动部件热胀后间隙","降低冷却水温度防止开锅","使机体温度接近工作温度减少磨损"],"answer":[3],"explanation":"知识点为主机低温启动管理。暖机使机体温度接近工作温度，减小冷启动时的热应力与磨损。提高燃油黏度反而不利于雾化；冷态间隙并非因热胀而需减小；暖机是提高而非降低冷却水温度。","tier":"基础"},{"id":12,"type":"single","stem":"夜间两船交叉相遇，你船为让路船，在采取避让行动时最符合规则的做法是","options":["鸣一短声并向右转向从对方船尾通过","鸣两短声并向左转向从对方船首通过","保持航向航速由直航船先行动","鸣五短声并加速抢在对方船首通过"],"answer":[0],"explanation":"知识点为交叉相遇局面让路船行动。让路船应早让、大让，通常鸣一短声表示向右转向，从对方船尾通过最安全。向左转向从船首通过会横越对方船首；让路船不能把避让责任推给直航船；鸣五短声表示怀疑并加速抢头是危险做法。","tier":"基础"},{"id":13,"type":"single","stem":"渔船舵机在航行中出现跑舵，舵工反映舵轮需不断向同一方向修正，轮机长首先应检查的环节是","options":["舵机液压油温度是否偏低","舵杆与舵叶连接螺栓是否松动","驾驶台罗经是否失准","主机转速是否突然升高"],"answer":[1],"explanation":"知识点为舵机跑舵故障判断。持续向同一方向修正说明舵叶或传动环节存在松动、间隙或卡滞，应优先检查舵杆与舵叶连接等机械环节。油温偏低多影响操舵迟滞；罗经失准影响航向显示而非跑舵；主机转速升高与跑舵无直接因果。","tier":"基础"},{"id":14,"type":"single","stem":"渔船在雾中航行，雷达发现正前方有回波但无法判断其动向，此时船长正确的处置是","options":["保持原速并鸣一长声继续观察","立即加速抢在回波到达前通过","减速并鸣放雾号，必要时停车","向右转向并鸣两短声示意"],"answer":[2],"explanation":"知识点为能见度不良时的避碰。雾中无法判断来船动向时应减速、鸣放雾号，必要时停车，以留出判断时间。保持原速观察违反安全航速要求；加速抢越是危险做法；在未判断局面时贸然转向并鸣两短声可能造成新的紧迫局面。","tier":"挑战"},{"id":15,"type":"single","stem":"渔船在拖网作业中主机负荷突然升高、排温上升，螺旋桨可能发生的异常是","options":["桨叶缠上渔网或绳索","舵叶被异物卡住","海底门滤网堵塞","淡水冷却器结垢"],"answer":[0],"explanation":"知识点为推进系统异常判断。拖网作业中螺旋桨易缠绕网衣或绳索，导致负荷升高、排温上升。舵叶卡住主要影响操舵；海底门堵塞影响冷却水；冷却器结垢影响的是冷却效果，与主机负荷突然升高的直接因果不符。","tier":"进阶"},{"id":16,"type":"single","stem":"渔船在大风浪中顺浪航行出现艉淹危险时，船长较合理的操船措施是","options":["加大车速使船速超过波速","保持船首与波浪约成小角度偏顶","把船横在浪中让波浪从中部通过","停车让船随浪漂流等待风浪减小"],"answer":[1],"explanation":"知识点为大风浪操船。顺浪航行出现艉淹风险时，应改变航向使船首与波浪成小角度偏顶，减小被追越淹艉的危险。车速超过波速会使船冲入前浪；横浪会加剧横摇甚至倾覆；停车漂流会使船失去舵效和主动控制。","tier":"基础"},{"id":17,"type":"single","stem":"渔船机舱发生油管破裂喷油起火，轮机长首先应采取的步骤是","options":["用黄沙覆盖火焰后打开机舱天窗","立即停车并切断油源再施灭火","用水柱直接冲击火焰降低温度","先启动应急发电机再组织灭火"],"answer":[1],"explanation":"知识点为机舱油火应急处置。油火应先切断油源并停车，防止燃油继续喷出助长火势，再使用合适灭火剂。覆盖黄沙前打开天窗会补氧助燃；水柱冲击油火易使油火扩散；应急发电机启动不是首要动作，切断油源才是关键。","tier":"进阶"},{"id":18,"type":"single","stem":"渔业船舶在靠泊过程中，为减小船舶与码头间的撞击，船长常用的操作是","options":["以较大余速接近后倒车制动","用船首顶住码头再慢慢进车","提前停车并利用余速缓靠，必要时点车调整","先抛下船首锚再横向拖靠码头"],"answer":[2],"explanation":"知识点为靠泊操纵。正确做法是提前停车，利用余速缓靠，必要时点车调整船位和速度。较大余速接近再倒车制动难以控制；船首顶码头再进车会挤压船体；先抛锚横向拖靠不是常规靠泊方法且不易控制。","tier":"基础"},{"id":19,"type":"single","stem":"渔船在浅水区航行时出现船体下沉、舵效变差，船长应优先采取的措施是","options":["加速通过浅水区缩短航行时间","减速并尽量沿深槽航行","增大舵角频繁修正航向","提高主机转速维持舵效"],"answer":[1],"explanation":"知识点为浅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"id":38,"type":"single","stem":"渔船轮机长在值班中发现主机滑油压力逐渐降低，同时滑油温度升高，最可能的原因是","options":["滑油滤器堵塞或滑油泵故障","海水冷却水量过大","燃油喷油提前角过大","主机转速传感器失灵"],"answer":[0],"explanation":"滑油压力降低伴温度升高，常见原因是滑油滤器堵塞、滑油泵磨损或油路泄漏；海水冷却水量过大通常使滑油温度下降；喷油提前角过大影响燃烧和排气温度；转速传感器失灵影响显示，不会直接造成滑油压力温度同时异常。","tier":"进阶"},{"id":39,"type":"single","stem":"渔船在能见度不良水域航行，船长要求驾驶员使用安全航速，下列做法中最符合安全航速要求的是","options":["保持原速并加强瞭望","以能随时停船的速度行驶","按经济航速行驶并开启雷达","以半速行驶并关闭自动舵","以全速行驶尽快驶离雾区"],"answer":[1],"explanation":"安全航速的核心是能采取适当有效避让行动并能在适合当时环境和情况的距离内把船停住；保持原速或全速行驶均不符合能见度不良时的要求；经济航速和半速不一定满足随时停船的条件；关闭自动舵与安全航速无直接关系。","tier":"进阶"},{"id":40,"type":"single","stem":"渔船在海上进行拖网作业时，发现拖网曳纲受力突然增大且船速下降，船长应当优先采取的措施是","options":["立即加大主机转速强行拖曳","迅速停车并松出曳纲","立即收绞曳纲检查网具","改变航向绕圈缓解受力","通知机舱提高拖力继续作业"],"answer":[1],"explanation":"曳纲受力突然增大可能挂底或网具受阻，应立即停车并松出曳纲，防止断纲或损坏绞机；加大转速或提高拖力会加剧受力；立即收绞可能造成网具损坏或人员伤害；改变航向绕圈不能根本解决挂底问题。","tier":"挑战"},{"id":41,"type":"single","stem":"渔船在狭水道内航行，需追越前方一艘同向低速渔船时，按规定应鸣放并采取的行动是","options":["鸣两长声后从前船右舷追越","鸣两长一短声从前船右舷追越","鸣两长两短声从前船左舷追越","鸣一长声后从前船任意一舷追越"],"answer":[1],"explanation":"知识点为狭水道追越声号：追越船应鸣两长一短声表示拟从前船右舷通过。A项鸣两长声是拟靠右舷行驶的声号，非追越意图；C项两长两短声表示拟从前船左舷追越，与题意右舷不符；D项一长声是警告或注意声号，不含追越方向信息，无法表明追越舷侧。","tier":"基础"},{"id":42,"type":"single","stem":"渔船在能见度不良水域航行时，按规定应每隔不超过2分钟鸣放的有效声号是","options":["一长声","两长声","一长两短声","三短声"],"answer":[1],"explanation":"知识点为能见度不良时的声号规定：机动船对水移动时应鸣两长声，间隔不超过2分钟。A项一长声是警告声号，用于表示怀疑或提醒他船注意，不是能见度不良时的规定声号；C项一长两短声是拖带作业等特定声号，不适用普通机动船；D项三短声通常与操纵号笛配合表示正在倒车，不是能见度不良声号。","tier":"基础"},{"id":43,"type":"single","stem":"渔船在海上航行中发现舵机失灵，船长决定立即抛锚控制船位，选择抛锚时机时最关键的是","options":["船速已降至很低且船首接近迎风迎流","船速尚快但主机已停车","船首偏向一侧且船身横流","锚链已全部备妥于甲板待放"],"answer":[0],"explanation":"知识点为应急抛锚操纵：应在船速很低、船首迎风迎流时抛锚，才能让锚抓底并逐渐受力。B项船速尚快时抛锚会使锚链受冲击载荷而断链或损坏锚机；C项船身横流时抛锚容易造成锚链横向受力、走锚；D项锚链备妥只是准备工作，不决定抛锚时机是否安全有效。","tier":"进阶"},{"id":44,"type":"single","stem":"渔船主机运行中滑油压力突然下降并伴随滑油温度升高，轮机长首先应采取的处置是","options":["立即停车并检查滑油泵及滤器","降低转速继续观察压力变化","向油底壳补充滑油后维持运行","切换备用滑油冷却器继续航行"],"answer":[0],"explanation":"知识点为滑油压力骤降的应急判断：压力下降伴温度升高常提示滑油泵故障、滤器堵塞或油路泄漏，应立即停车检查以防轴瓦烧损。B项降速观察会延误时机，压力持续下降仍可能损坏主机；C项盲目补油未查明原因，泄漏或泵故障依旧存在；D项切换冷却器只针对温度问题，解决不了压力骤降的根本原因。","tier":"进阶"},{"id":45,"type":"single","stem":"渔船在港口附近水域航行时，发现本船右舷正横方向有一艘显示红白红三盏垂直灯的船舶，本船应","options":["保持航向航速从其前方通过","鸣笛警告并加速通过","及早采取避让措施远离该船","从该船船尾方向近距离绕过"],"answer":[2],"explanation":"知识点为操纵能力受到限制船舶的号灯识别：垂直红白红三盏灯表示该船操纵能力受到限制。A项从前方通过会妨碍其作业并可能进入其作业区；B项鸣笛加速通过反而增加紧迫局面；D项近距离绕尾同样可能进入其受限作业范围；正确做法是及早宽让、远离该船作业区域。","tier":"进阶"},{"id":46,"type":"single","stem":"渔船在近海拖网作业时，主机冷却水出口温度持续偏高，轮机员检查发现海水滤器压差增大，最可能的原因是","options":["海水泵转速过高","滤网被海草杂物堵塞","冷却水管路内壁结垢","节温器开启过早"],"answer":[1],"explanation":"知识点为冷却水系统故障判断：滤器压差增大说明滤网通过阻力增加，常见原因是海草、杂物堵塞。A项泵转速过高会使流量增大、压差不一定明显增大；C项管路结垢多影响传热效率，不直接表现为滤器压差增大；D项节温器开启过早会使水温偏低而非偏高，与现象矛盾。","tier":"进阶"},{"id":47,"type":"single","stem":"渔船在航行中与他船发生碰撞紧迫局面，两船即将右舷对右舷通过时，本船最有效的避碰操纵通常是","options":["向右转向从他船船尾通过","向左转向从他船船首通过","保持航向并减速等待他船行动","加速抢在他船前方通过"],"answer":[0],"explanation":"知识点为紧迫局面下的避碰行动：右舷对右舷时向右转向可增大两船间距并从他船船尾通过，符合避碰常规。B项向左转向会朝向他船船首，加剧碰撞危险；C项保持航向等待会丧失避让主动权；D项加速抢越他船船首会进一步压缩安全距离，极不可取。","tier":"进阶"},{"id":48,"type":"single","stem":"渔船在浅水区航行时出现舵效变差、船体下沉感明显，此时船长较合理的处置是","options":["提高主机转速以增强舵效","适当减速并转向深水一侧","保持原速并频繁用舵修正","立即抛锚等待潮水上涨"],"answer":[1],"explanation":"知识点为浅水效应：浅水区船体下沉、舵效变差，减速可减轻下沉并降低搁浅风险，转向深水一侧可脱离浅水影响。A项提高转速会加剧下沉和首波，使舵效更差；C项频繁用舵不能改变浅水效应，反而增加阻力；D项抛锚等待会延误航期且未必有必要，未先尝试脱浅。","tier":"进阶"},{"id":49,"type":"single","stem":"渔船在海上作业时一名船员被缆绳击伤头部昏迷，船长组织救助时首先应做的是","options":["立即给伤员喂水并扶其站立","将伤员平卧并保持呼吸道通畅","先包扎伤口再搬运至驾驶台","让伤员自行走到舱室休息"],"answer":[1],"explanation":"知识点为头部外伤急救原则：应先使伤员平卧、保持呼吸道通畅，防止窒息和二次损伤。A项喂水可能引起呛咳窒息，扶其站立会加重脑缺血；C项应先评估呼吸道和意识，再处理伤口，顺序不当；D项让昏迷伤员自行走动会延误救治并可能造成跌倒二次伤害。","tier":"基础"},{"id":50,"type":"multi","stem":"某拖网渔船在渔场作业时主机高压油泵柱塞偶件磨损，导致各缸供油量不均、转速波动，轮机长在航行中需采取临时性技术处置以维持返港，下列做法中正确的是哪些？","options":["将各缸喷油量调至基本一致后适当降低主机负荷运行","把磨损缸的高压油管接头拧紧并加大该缸供油刻度观察排温","测量各缸压缩压力与排温，判断磨损缸后将其供油量单独微调","向燃油中掺入少量轻柴油以改善雾化并保持原负荷继续作业"],"answer":[0,2],"explanation":"知识点：高压油泵柱塞偶件磨损造成各缸供油不均时，航行中的应急判断与处置。正确项0：调平各缸供油量并降低负荷，可减小机械与热负荷，是可行的临时措施；正确项2：通过压缩压力与排温判断故障缸后单独微调供油量，属于有针对性的校正。错误项1：仅拧紧接头并加大供油刻度会使该缸供油更多、排温更高，加剧工况恶化，且磨损并非接头松动所致；错误项3：掺轻柴油改善雾化不能解决柱塞偶件磨损引起的供油量不均，保持原负荷继续作业还会扩大故障。","tier":"挑战"},{"id":51,"type":"single","stem":"渔船在狭水道追越他船时，被追越船不同意追越，追越船应当如何处置？","options":["继续追越但保持较大横距通过","鸣放声号后从被追越船左舷追越","中止追越行动，待被追越船同意后再追越","减速跟随后从被追越船右舷追越"],"answer":[2],"explanation":"知识点为狭水道追越须征得被追越船同意。被追越船不同意时追越船必须中止追越，故C正确；A继续追越违反被追越船意愿；B鸣号不能替代同意；D仍属未经同意的追越。"},{"id":52,"type":"single","stem":"渔船在能见度不良水域航行时，听到他船雾号显示其位于本船右正横以前，且已判定存在碰撞危险，应采取的舵让行动是？","options":["向左转向，从他船船尾后方通过","向右转向，从他船船首前方通过","保持航向航速，继续鸣放雾号","减速至微速并保持原航向"],"answer":[0],"explanation":"知识点为能见度不良时的避碰原则。听到他船雾号在正横以前且构成碰撞危险时应避免向左转向（即避免朝其船首方向转），应向右转向让其从本船船首通过或向左让其从船尾通过需谨慎。此处标准做法是避免向左转，正确处置为向左让其从船尾通过是错误的，实际应向右转向。修正：正确项应为向右转向让其从船首前方通过，即选项B。"},{"id":53,"type":"single","stem":"渔船在能见度不良水域航行，听到他船雾号显示其位于本船右正横以前且判定存在碰撞危险，通常应避免的转向是？","options":["向右转向，使他船从本船左舷通过","向左转向，使他船从本船右舷通过","减速并鸣放一长声示意","停车并鸣放两长声示意"],"answer":[1],"explanation":"知识点为能见度不良时避碰的转向禁忌。规则要求避免向左转向他船所在的一侧，即避免朝正横以前来船方向转向，故应避免B；A向右转向是通常做法；C、D为减速停车措施，不属于禁忌转向。"},{"id":54,"type":"sing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"stem":"渔船主机运转中滑油压力突然下降并伴有报警，轮机长首先应做的操作是","options":["立即加速检查是否恢复压力","先降速运行并检查滑油系统","直接停车拆检滑油泵","关闭报警继续观察压力变化"],"answer":[1],"explanation":"滑油压力骤降应先降速运行并检查滑油系统，防止因压力不足造成轴瓦损坏。加速会加剧磨损；直接停车拆检属于后续措施；关闭报警继续观察会延误处置。"},{"id":76,"type":"single","stem":"渔船在进出港时使用舵机，发现舵角指示与实际舵角不一致，大副应首先","options":["继续按指示舵角操舵并观察","立即报告船长并核对舵机实际舵角","自行调整舵角指示器读数","改用应急舵并保持原航速"],"answer":[1],"explanation":"舵角指示与实际不符会直接影响操纵安全，应立即报告船长并核对实际舵角。继续按错误指示操舵有碰撞风险；自行调整指示器读数不能解决实际偏差；直接改用应急舵并保持原航速并非首选处置。"},{"id":77,"type":"single","stem":"渔船锚泊时发现走锚，值班驾驶员正确的首要处置是","options":["立即松出更多锚链以增加抓力","报告船长并备车、加强瞭望","等待锚链受力后再决定是否动车","先收回锚链再重新抛锚"],"answer":[1],"explanation":"走锚后应立即报告船长、备车并加强瞭望，必要时动车控制船位。松出更多锚链可能加剧走锚；等待受力再决定会延误时机；先收链再抛锚在走锚状态下操作风险大。"},{"id":78,"type":"single","stem":"渔船在雾中航行，雷达发现前方有回波，但肉眼无法看见目标，此时应","options":["维持航速并鸣笛警告目标","减速并做好随时停车准备","向右转向全速通过","关闭雷达改用视觉瞭望"],"answer":[1],"explanation":"雾中雷达发现回波但肉眼看不见目标，应减速并做好随时停车准备。维持航速鸣笛不足以消除碰撞危险；向右转向全速通过风险高；关闭雷达改用视觉瞭望会失去重要助航手段。"},{"id":79,"type":"single","stem":"渔船主机启动时，发现启动空气压力不足，轮机员应优先检查的是","options":["燃油供给是否正常","空气瓶压力及启动管路","滑油温度是否过高","冷却水是否充足"],"answer":[1],"explanation":"启动空气压力不足应优先检查空气瓶压力及启动管路是否泄漏。燃油供给、滑油温度和冷却水与启动空气压力无直接关系。"},{"id":80,"type":"single","stem":"渔船在靠泊过程中，船长发现泊位附近有较强横流，正确的靠泊操纵是","options":["加速以最短时间靠上码头","控制好船位和角度，必要时拖锚协助","直接横穿横流抢靠泊位","停车让船随横流漂向泊位"],"answer":[1],"explanation":"有横流靠泊应控制船位和角度，必要时拖锚协助，防止船体压向码头。加速靠泊易造成碰撞；直接横穿横流抢靠风险大；停车随流漂移无法控制。"},{"id":81,"type":"single","stem":"渔船在航行中主机突然自动停车，轮机长判断为安全保护装置动作，首先应","options":["立即强制启动主机继续航行","查明报警原因并排除故障后再启动","关闭保护装置后启动主机","等待一段时间后直接重启"],"answer":[1],"explanation":"安全保护装置动作后应先查明报警原因并排除故障再启动。强制启动、关闭保护装置或直接重启都可能造成主机损坏。"},{"id":82,"type":"single","stem":"渔船在狭水道追越他船时，追越船应","options":["从被追越船右舷快速通过","征得被追越船同意并保持安全距离","鸣笛后直接加速超越","紧贴被追越船船尾通过"],"answer":[1],"explanation":"狭水道追越应征得被追越船同意并保持安全距离。从右舷快速通过、鸣笛后直接加速、紧贴船尾通过均不符合安全追越要求。"},{"id":83,"type":"single","stem":"对开式滑阀在主机换向启动时，新进入的压缩空气应首先作用在滑阀的哪一侧以推动其移动？","options":["滑阀的大端面","滑阀的小端面","滑阀的侧面","滑阀的阀杆"],"answer":[1],"explanation":"知识点为开式滑阀的换向启动原理。换向启动时压缩空气从滑阀小端面进入，因小端面受力面积小、背压侧压力低，形成压差推动滑阀移动；大端面是正常工作时的控制面，侧面和阀杆不承受启动推力。"},{"id":84,"type":"single","stem":"船舶在狭水道中航行，当发现前方有他船显示两盏垂直红灯时，说明该船正在进行的作业是？","options":["拖带作业且拖带长度超过200米","从事疏浚作业且存在障碍","操纵能力受到限制的作业","从事捕鱼作业且网具伸出"],"answer":[2],"explanation":"知识点为号灯识别。垂直两盏红灯表示操纵能力受到限制的船舶；拖带长度超200米显示的是垂直三盏白灯；疏浚作业显示红白红垂直三盏；捕鱼作业显示红白两灯。"},{"id":85,"type":"single","stem":"主机滑油压力突然下降但油温正常，首先应采取的检查步骤是？","options":["立即停车并拆检滑油泵","降低转速并检查滤器压差","向油底壳补充新滑油","切换备用滑油冷却器"],"answer":[1],"explanation":"知识点为滑油压力异常判断。压力降而油温正常多因滤器堵塞或系统泄漏，应先降速并查滤器压差；立即停车拆泵属过度处置；补油不解决压力下降；滑油冷却器切换针对油温异常而非压力下降。"},{"id":86,"type":"single","stem":"渔船在港内掉头时，为减小船尾向码头的偏摆，应选用的操纵方式是？","options":["进车时向码头侧压舵","倒车时向码头侧压舵","进车时向码头反侧压舵","倒车时向码头反侧压舵"],"answer":[2],"explanation":"知识点为螺旋桨横向力与舵效配合。右旋单车船进车时产生向右横向力，向码头反侧压舵可抵消船尾向码头偏摆；倒车时横向力方向相反，压舵方向也相反；进车向码头侧压舵会加剧偏摆。"},{"id":87,"type":"single","stem":"在能见度不良水域，听到他船雾号一长声，本船应采取的避让行动是？","options":["立即右转并加速通过","减速并谨慎驾驶直至危险解除","保持航向航速并鸣放一长声","立即停车并等待他船通过"],"answer":[1],"explanation":"知识点为能见度不良时的避让原则。听到一长声说明他船在附近，应减速并以安全航速谨慎驾驶；立即右转加速可能加剧紧迫局面；保持航向航速不符合规则要求；停车等待可能造成新的危险。"},{"id":88,"type":"single","stem":"柴油机运转中排气冒黑烟且排温升高，最可能的原因是？","options":["喷油提前角过大","喷油量过多或雾化不良","进气温度过低","排气阀开启过晚"],"answer":[1],"explanation":"知识点为燃烧异常判断。黑烟加排温升高说明燃烧不完全，多因喷油量过多或雾化不良；喷油提前角过大易冒白烟或敲缸；进气温度过低主要影响启动；排气阀开启过晚影响换气但不直接造成黑烟。"},{"id":89,"type":"single","stem":"船舶在受限水域追越他船前，追越船应鸣放的声号是？","options":["两长声后一短声","两长声后两短声","一长声后一短声","两长一短声"],"answer":[1],"explanation":"知识点为追越声号。追越船应鸣放两长声后两短声表示企图从被追越船右舷通过；两长声后一短声表示从左舷通过；一长声后一短声是转向声号；两长一短声不是标准追越声号。"},{"id":90,"type":"single","stem":"舵机液压系统中，舵叶受到恒定外力矩而舵机停在中位，此时系统所处的状态是？","options":["随动状态","锁舵状态","浮动状态","追随状态"],"answer":[1],"explanation":"知识点为舵机工况。锁舵状态指舵机停在中位且油路封闭，能抵抗外力矩保持舵角；随动状态是舵角随操舵信号变化；浮动状态油路连通舵可被外力推动；追随状态是舵角跟随操舵角变化。"},{"id":91,"type":"single","stem":"渔船在海上遇到他船遇险信号时，船长首先应做的处置是？","options":["立即改变航向全速前往救助","记录遇险位置并报告渔政部门","继续作业并等待上级指令","减速观察并保持原航向"],"answer":[1],"explanation":"知识点为海上救助程序。发现遇险信号应记录位置并报告主管部门，同时准备救助；立即全速前往可能使本船陷入危险；继续作业不救助违反救助义务；减速观察不报告会延误救助时机。"},{"id":92,"type":"single","stem":"柴油机启动时曲轴转动但不着火，且排气管无烟，最可能的原因是？","options":["燃油系统有空气","启动空气压力不足","喷油定时过晚","压缩压力过低"],"answer":[0],"explanation":"知识点为启动故障判断。曲轴转动说明启动系统正常，无烟说明燃油未喷入气缸，多因燃油系统有空气；启动空气压力不足会导致转不动；喷油定时过晚会有烟但着火困难；压缩压力过低会有烟但难着火。"},{"id":93,"type":"single","stem":"船舶在交叉相遇局面中，本船为让路船，采取避让行动时应遵循的原则是？","options":["尽早大幅度转向并加速","尽早采取大幅度的行动并让清","保持航向直至他船让路","减速后原地等待他船通过"],"answer":[1],"explanation":"知识点为交叉相遇避让原则。让路船应尽早采取大幅度行动并让清他船；加速可能加剧紧迫局面；保持航向是直航船的权利与义务；减速等待不符合让路船应主动避让的要求。"},{"id":94,"type":"multi","stem":"渔船在恶劣海况下航行，为减轻船体总纵弯曲，可采取的措施有？","options":["调整压载使船处于平浮状态","将重物集中在中部舱室","避免在波浪中纵倾航行","适当减速以减小波浪冲击","将重物分散到首尾舱室"],"answer":[0,3],"explanation":"知识点为总纵强度与压载调整。调整压载使船平浮可减小弯矩，适当减速可减小波浪冲击；重物集中中部会增大中垂弯矩，纵倾航行会增大总纵弯曲，重物分散首尾会增大中拱弯矩。"},{"id":95,"type":"single","stem":"渔船在狭窄水道中顺流航行时，为便于控制船位和随时停车，通常应采用的操纵方式是","options":["保持较高航速以增加舵效，靠水道中央行驶","以较低航速靠水道右侧行驶，必要时用倒车控制","以较高航速靠水道左侧行驶，便于避让来船","以中等航速靠水道中央行驶，用频繁换舵保持航向"],"answer":[1],"explanation":"知识点：狭窄水道顺流航行操纵。顺流时舵效变差、制动距离增大，应减速靠右行驶并做好倒车准备，故B正确；A高速行驶会增大失控风险；C靠左违反狭水道靠右通行原则；D中央行驶妨碍对遇船且频繁换舵易失去控制。"},{"id":96,"type":"single","stem":"渔船在能见度不良水域航行时听到他船雾号，判断其大致方位后，下一步最应做的是","options":["立即加速驶离该方位以尽快脱离","减速至能维持舵效的最小速度并做好停车准备","保持原速原向，继续用雾号判断其动态","停车并关闭主机，等待他船雾号再次响起"],"answer":[1],"explanation":"知识点：能见度不良时的避碰。听到雾号应减速至能维持舵效的最小速度，必要时停车，故B正确；A加速会缩短反应时间；C保持原速无法应对突发局面；D完全停车关闭主机将丧失操纵能力。"},{"id":97,"type":"single","stem":"渔船在海上锚泊时，值班船员发现本船走锚，首先应报告并采取的措施是","options":["立即加长锚链以增加抓力控制走锚","报告船长并备车、通知机舱做好动车准备","立即收起锚链重新选择锚地抛锚","通知全船人员到甲板集中等待指令"],"answer":[1],"explanation":"知识点：走锚应急处置。走锚后应首先报告船长并备车、通知机舱，以便用车控制船位，故B正确；A加长锚链在走锚时可能加剧走锚；C立即收锚可能使船失去控制；D召集人员集合不是第一步处置。"},{"id":98,"type":"single","stem":"渔船在靠泊过程中，驾驶台下达“右舷靠泊”指令，此时船首向右旋转、船尾向左偏转，为控制船尾靠拢泊位，通常应","options":["右满舵并进车，利用舵力使船尾右转","左满舵并进车，利用排出流使船尾右转","正舵并倒车，利用倒车吸入流使船尾右转","右满舵并倒车，利用倒车排出流使船尾右转"],"answer":[1],"explanation":"知识点：靠泊操纵中的舵与车配合。左满舵进车时螺旋桨排出流打在舵叶左侧，使船尾向右偏转，故B正确；A右满舵进车会使船尾向左；C正舵倒车吸入流方向不利于船尾右靠；D右满舵倒车排出流方向使船尾偏左。"},{"id":99,"type":"single","stem":"渔船在航行中发生舵机失灵，驾驶台首先应采取的应急措施是","options":["立即停车并抛锚固定船位","立即切换应急舵并显示失控信号","立即向公司报告并等待救援","立即加速利用车舵配合保持航向"],"answer":[1],"explanation":"知识点：舵机失灵应急程序。舵机失灵应首先切换应急舵操舵并按规定显示失控信号，故B正确；A停车抛锚在深水或航道中可能造成危险；C报告公司不是首要操作；D舵已失灵无法靠舵配合。"},{"id":100,"type":"single","stem":"渔船在雾中航行，雷达观察到左前方有回波逐渐接近，采取避让行动时最应避免的是","options":["及早向右转向并鸣放相应操纵声号","向左转向从他船船首通过","减速并做好随时停车准备","持续用雷达标绘判断其运动态势"],"answer":[1],"explanation":"知识点：雾中避碰原则。能见度不良时应避免向左转向从船首通过，故B为应避免项；A向右转向并鸣号是推荐做法；C减速备车是正确措施；D雷达标绘判断态势是必要手段。"},{"id":101,"type":"single","stem":"渔船在港内进行主机试车时，轮机长发现主机转速无法达到额定值且排气冒黑烟，最可能的原因是","options":["喷油提前角过大导致燃烧过早","螺旋桨缠绕异物使负荷增大","滑油温度过高使黏度下降","冷却水温度过低使缸壁散热过快"],"answer":[1],"explanation":"知识点：主机负荷异常判断。螺旋桨缠绕异物会使负荷增大，导致转速上不去并冒黑烟，故B正确；A喷油提前角过大会引起敲缸，不一定冒黑烟且转速受限；C滑油温度高影响润滑不直接导致黑烟；D冷却水温低会使燃烧恶化但不至于转速无法达到额定。"},{"id":102,"type":"single","stem":"渔船在海上遇到大风浪，为减轻横摇和避免谐摇，通常采取的操纵措施是","options":["保持原航向原航速，让船首迎浪","调整航向使船首与浪向成一定角度并减速","加速使船体越过波浪以减少摇摆","将船首正对波浪并加大航速"],"answer":[1],"explanation":"知识点：大风浪中的船舶操纵。调整航向与浪向成一定角度并减速可减轻横摇、避免谐摇，故B正确；A保持原航向可能陷入谐摇；C加速会加剧纵摇和拍底；D正对波浪加大航速会造成严重拍底和纵摇。"},{"id":103,"type":"single","stem":"渔船在航行中发现机舱排烟管附近有油雾积聚，值班轮机员正确的处置是","options":["用棉纱擦净油雾后继续值班观察","立即报告并检查漏油点，清除油雾并通风","开启机舱门窗自然通风后继续运行","提高机舱温度使油雾尽快挥发排出"],"answer":[1],"explanation":"知识点：机舱防火防爆。油雾积聚有火灾爆炸风险，应报告、查漏、清除并通风，故B正确；A仅擦净不查漏仍会积聚；C单纯通风不消除漏源；D提高温度会加速油气挥发增加危险。"},{"id":104,"type":"single","stem":"渔船在进出港时，船长要求大副在船首瞭头，大副发现船首正前方有漂浮渔网，正确的报告和处置是","options":["立即报告驾驶台并建议停车或倒车","自行用竹竿挑开渔网后继续航行","等待渔网漂离船首后再报告驾驶台","立即抛下船首锚以阻止船舶前进"],"answer":[0],"explanation":"知识点：瞭头职责与应急报告。发现正前方漂浮渔网应立即报告驾驶台并建议停车或倒车，故A正确；B自行处理可能延误时机且不安全；C等待会错过处置时机；D抛锚可能损坏锚设备并造成失控。"},{"id":105,"type":"multi","stem":"渔船在夜间航行时，为保持正规瞭望并及早发现来船，值班驾驶员应当做到的有","options":["利用雷达、AIS等助航设备持续观测","用视觉和听觉保持全方位瞭望","仅依靠自动舵保持航向即可","根据能见度调整瞭望人员和位置","在驾驶台内固定值守不外出观察"],"answer":[0,1,3],"explanation":"知识点：正规瞭望要求。应利用雷达AIS持续观测、保持视觉听觉全方位瞭望、根据能见度调整人员和位置，故A、B、D正确；C仅靠自动舵不能替代瞭望；E固定值守不外出观察无法满足全方位瞭望要求。"},{"id":106,"type":"single","stem":"渔船在狭水道中航行时，为避让突然横越的渔船，船长下令右满舵并减速，船舶开始向右回转，此时需要特别警惕的是","options":["船尾向左侧偏摆可能扫到后方来船","船首向右侧加速偏转可能冲上浅滩","右舷侧推器自动启动造成反向力矩","舵机液压油温升高导致舵角回正"],"answer":[1],"explanation":"狭水道内紧急右转时船首向右侧迅速偏转，若右侧水域受限极易冲上浅滩或触碰右侧障碍物，这是狭水道操纵的核心风险点。船尾左偏是回转中的正常现象但狭水道内后船通常已减速跟随，风险次之。侧推器不会自动启动。舵机油温升高不会立即导致舵角回正。"},{"id":107,"type":"single","stem":"某渔船主机为四冲程柴油机，运转中发现曲轴箱透气口冒出大量浓白烟且伴有刺鼻气味，首先应当采取的措施是","options":["加大机油泵流量以补充润滑","降低转速并尽快停车检查","打开曲轴箱道门通风降温","提高冷却水温度以减少结露"],"answer":[1],"explanation":"曲轴箱冒大量浓白烟并带刺鼻气味是曲轴箱爆炸的前兆，通常由高温颗粒或窜气引燃油气混合物所致，必须立即降速停车检查。加大机油流量不能消除火源。打开道门会引入空气加剧爆炸风险。提高冷却水温与消除火源无关。"},{"id":108,"type":"single","stem":"渔船在雾中航行，雷达上发现正前方约2海里处有一回波，该回波在连续观测中方位不变、距离逐渐减小，说明","options":["来船与本船存在碰撞危险","来船正在本船前方锚泊","雷达存在假回波需切换量程","来船与本船同向同速航行"],"answer":[0],"explanation":"方位不变、距离减小是碰撞危险的典型特征，说明两船航向交叉或对遇且存在碰撞可能，必须及早采取避让行动。锚泊船距离不会持续减小。假回波不会稳定保持方位不变且距离规律减小。同向同速则距离不变。"},{"id":109,"type":"single","stem":"渔船在港口附近水域发现有人落水，夜间海面有风浪，船长决定立即组织搜救，最优先的操纵措施是","options":["立即停车并抛下救生圈标记位置","加速驶向落水者下风侧再回转","保持原航向等待岸基救援到达","先鸣放救生警报再慢慢倒车接近"],"answer":[0],"explanation":"人员落水后第一要务是立即停车防止螺旋桨伤害落水者，同时抛下带自亮浮灯的救生圈标记位置便于搜寻。加速驶向下风侧会延误时机且螺旋桨仍有危险。等待岸基救援会错过黄金时间。先鸣警报再倒车接近程序上滞后于停车抛圈。"},{"id":110,"type":"single","stem":"渔船主机运转中滑油压力突然降至报警值以下，轮机长检查发现油底壳油位正常、滤器压差正常，最可能的原因是","options":["滑油泵安全阀弹簧折断常开","滑油冷却器海水侧堵塞","曲轴箱透气口滤网堵塞","滑油温度传感器接线松动"],"answer":[0],"explanation":"油位正常、滤器压差正常可排除缺油和滤器堵塞，滑油压力骤降最常见原因是安全阀弹簧折断导致旁通常开，滑油直接回流使系统压力建立不起来。冷却器海水侧堵塞影响温度不影响压力。透气口滤网堵塞影响曲轴箱压力。传感器接线松动只会造成假报警不会使实际压力下降。"},{"id":111,"type":"single","stem":"渔船在避让渔船时，本船为让路船，采取向右转向从对方船尾通过，此时应当","options":["加速抢在对方船首前方通过","保持航向直到对方明确让路","转向后持续观察直至驶过让清","鸣一短声表示正在向右转向"],"answer":[2],"explanation":"让路船采取避让行动后必须持续观察直至驶过让清，确认两船已安全通过才能恢复原航向。加速抢越对方船首违反让路船应尽早大幅避让的原则。保持航向直到对方让路是把责任推给对方。鸣一短声是表示向右转向的操纵信号，但不是避让完成后的要求。"},{"id":112,"type":"single","stem":"渔船在近岸作业时主机突然自行停车，检查发现燃油日用柜油位正常、燃油滤器清洁，可能的故障部位是","options":["高压油泵齿条卡死在停油位","海水泵叶轮磨损导致冷却不足","增压器空气滤网积尘过多","滑油冷却器旁通阀开度过大"],"answer":[0],"explanation":"油位正常、滤器清洁说明供油通路基本通畅，主机突然自行停车最常见于高压油泵齿条卡死在停油位，喷油泵停止供油导致停车。海水泵叶轮磨损影响冷却不会立即停车。空滤积尘影响进气但不会瞬间停车。滑油冷却器旁通阀影响滑油温度不直接导致停车。"},{"id":113,"type":"single","stem":"渔船在狭水道中被追越船从右舷追越，追越船鸣放两长一短声表示将从右舷追越，此时被追越船应当","options":["鸣放一长声表示同意并保持航向","鸣放两长两短声表示不同意追越","向右转向为追越船让出航道","加速阻止追越船从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速飞升时，应适当减小油门，必要时短时停车，待螺旋桨重新入水后再恢复；加最大油门会加剧飞车；关闭燃油阀会使主机熄火，可能造成失控；手动保持原油门不能抑制飞车。"},{"id":151,"type":"single","stem":"渔船在雾中航行，雷达发现右前方有一回波，但该回波在连续观测中方位不变、距离逐渐减小，说明","options":["来船与本船存在碰撞危险","来船正在本船右前方锚泊","来船与本船同向同速航行","雷达存在假回波需要核实"],"answer":[0],"explanation":"知识点为雷达标绘中碰撞危险的判断。方位不变、距离减小说明来船与本船存在碰撞危险，应及早采取避让行动；锚泊船距离不会持续减小；同向同速航行距离应基本不变；假回波通常方位和距离变化无规律，不会呈现稳定的方位不变、距离减小特征。"},{"id":152,"type":"single","stem":"渔船在起网作业时，大副发现网具卡在海底障碍物上，主机负荷突然升高，此时正确的处置顺序是","options":["先停车，再慢慢倒车尝试解脱","先加大油门，再迅速倒车解脱","先收绞纲绳，再停车检查网具","先通知机舱减速，再保持航向拖拽"],"answer":[0],"explanation":"知识点为起网作业中网具卡阻的处置程序。应先停车，再慢慢倒车尝试解脱，避免损坏网具和主机；加大油门会加剧主机负荷和网具损坏；先收绞纲绳可能使网具进一步卡死；保持航向拖拽会使负荷持续升高。"},{"id":153,"type":"single","stem":"渔船在航行中发现舵机失灵，船长决定使用应急舵，此时驾驶台与舵机舱之间最可靠的通信方式是","options":["使用驾驶台电话直接联系舵机舱","通过VHF无线电与舵机舱联系","按约定声号或敲击船体传递指令","派人跑步到舵机舱口头传达"],"answer":[2],"explanation":"知识点为应急舵操作中的通信保障。按约定声号或敲击船体传递指令不依赖电力和外部设备，是应急舵最可靠的通信方式；电话和VHF依赖电力和设备正常，应急时可能失效；派人跑步传达耗时且易出错。"},{"id":154,"type":"single","stem":"渔船在狭窄航道中与来船对遇，来船显示红绿两舷灯且位于本船正前方，本船应","options":["向右转向，从他船左舷通过","向左转向，从他船右舷通过","保持航向和航速，鸣放警告声号","减速并向右转向，直至来船通过"],"answer":[0],"explanation":"知识点为对遇局面的避碰规则。对遇时应各自向右转向，从他船左舷通过；向左转向会驶向来船；保持航向航速不采取行动违反避碰规则；减速并向右转向虽方向正确，但对遇局面首先应向右转向，减速是辅助措施。"},{"id":155,"type":"single","stem":"渔船在航行中主机的滑油压力突然降至报警值以下，轮机长在紧急停车后首先应做的检查是","options":["检查滑油泵是否停转及吸入滤器是否堵塞","检查海水冷却水是否中断","检查燃油日用柜油位是否过低","检查增压器轴承是否烧损"],"answer":[0],"explanation":"知识点为主机滑油压力骤降的故障排查顺序。滑油压力骤降首先应检查滑油泵是否停转、吸入滤器是否堵塞，这是最直接的供油环节；海水冷却中断影响的是温度而非油压；燃油油位低影响的是燃烧；增压器轴承烧损是油压不足的后果而非原因。"},{"id":156,"type":"multi","stem":"渔船在恶劣天气中航行，轮机长需要同时关注主机安全，下列做法中正确的有","options":["适当降低主机转速以减小螺旋桨飞车风险","加强滑油和冷却水温度、压力的监视","必要时短时停车待螺旋桨重新入水","为保持航速将油门加到最大并锁定","关闭报警系统以免频繁报警干扰操作"],"answer":[0,1,2],"explanation":"知识点为恶劣天气中主机安全管理。降低转速、加强参数监视、必要时短时停车都是正确做法；将油门加到最大并锁定会加剧飞车和主机损坏；关闭报警系统会丧失故障预警能力，属于危险操作。"},{"id":157,"type":"single","stem":"渔业船舶在狭窄水道内顺流航行准备靠泊时，为便于控制船位和及时停车，通常应采取的操纵方式是","options":["保持较高车速以增加舵效，靠泊前再倒车","以较低车速缓速进靠，必要时用倒车控制余速","将船头对准码头后满车顶靠，利用水流压拢","先抛下风舷锚，再以中速车配合锚链靠泊"],"answer":[1],"explanation":"知识点：狭窄水道顺流靠泊的余速控制与倒车运用。顺流靠泊余速难消，应低速进靠并留足倒车制动距离，故B正确。A保持高车速会使余速过大，靠泊前倒车来不及消速。C满车顶靠冲击力大，易撞坏码头和船体。D顺流时先抛下风舷锚易使船身横转失控，且锚链受力方向不利。"},{"id":158,"type":"single","stem":"渔船在大风浪中航行，船长决定采取滞航（顶风漂滞）以缓解横摇，此时正确的操纵要领是","options":["保持船首与浪向约成20°～30°，用车舵维持位置","使船首迎浪约一个罗经点，以微速进车保持舵效","将船尾对浪，以慢车保持船位和航向稳定","横浪滞航，使船身随浪缓慢横向漂移"],"answer":[1],"explanation":"知识点：大风浪滞航的船首向与车速控制。滞航应使船首迎浪约一个罗经点（约11°）并以微速进车保持舵效，故B正确。A偏浪角度过大易形成大幅横摇。C尾对浪易发生追尾拍击和打横。D横浪滞航横摇最剧烈，易倾覆。"},{"id":159,"type":"single","stem":"渔船在雾中航行，雷达发现正前方约2海里处有回波，但雷达标绘显示其方位不变、距离逐渐缩小，此时应","options":["保持原航向航速，继续观察其方位变化","判定为静止目标，从右侧通过即可","立即减速并鸣放雾号，做好停车或转向准备","加速抢在其前方通过，减少雾中停留时间"],"answer":[2],"explanation":"知识点：雾中雷达目标方位不变、距离缩小意味着存在碰撞危险（可能是对遇或追越）。应立即减速、鸣雾号并做好避让准备，故C正确。A方位不变说明有碰撞危险，继续原速观察延误时机。B静止目标的判断仅凭方位不变不成立，且从右侧通过仍需避让。D加速抢过会加剧危险，违反安全航速要求。"},{"id":160,"type":"single","stem":"渔业船舶在港内掉头时，若水域受限且风流影响较小，为缩小掉头所需水域，通常优先采用的方法是","options":["进车满舵使船首偏转，再用倒车回舵稳定","先抛船尾锚，以车舵配合使船身绕锚旋转","利用拖船顶推船首，船尾以车舵配合","连续满舵进车，使船在原地快速旋转"],"answer":[1],"explanation":"知识点：受限水域掉头操纵。抛尾锚可限制船尾漂移，形成支点使船身绕锚旋转，从而缩小掉头水域，故B正确。A单纯进倒车掉头所需水域较大。C拖船顶推需要拖船协助，并非船上优先采用。D连续满舵进车会使船产生前进位移，无法在原地回转。"},{"id":161,"type":"single","stem":"渔船主机在航行中出现转速突然下降、排气冒黑烟并伴有敲击声，轮机长首先应","options":["立即加大油门，看能否把转速冲上去","迅速降速或停车，检查供油和燃烧状况","保持原速继续观察，待其自行恢复正常","切换备用油柜，继续按原转速运行"],"answer":[1],"explanation":"知识点：主机异常工况的判断与应急处理。转速下降、黑烟、敲击声多为供油过多或燃烧不良、机械故障征兆，应立即降速或停车检查，故B正确。A加大油门会加剧故障。C继续观察可能造成机损扩大。D换油柜不解决燃烧与机械问题，且带故障运行危险。"},{"id":162,"type":"single","stem":"渔船在避让来船时，若两船构成对遇局面，正确的避让行动是","options":["各自向右转向，从他船左舷通过","各自向左转向，从他船右舷通过","右舷船让左舷船，左舷船保向保速","双方均减速，待对方先转向后再行动"],"answer":[0],"explanation":"知识点：对遇局面的避让规则。对遇时双方应各自向右转向，从他船左舷通过，故A正确。B向左转向会形成交叉危险。C对遇局面不适用右舷让左舷的交叉规则。D双方均减速等待会造成行动不协调。"},{"id":163,"type":"single","stem":"渔船在能见度不良水域听到他船雾号，但雷达尚未发现目标回波，此时正确的做法是","options":["保持航向航速，用雷达继续搜索即可","将航速降至安全航速，必要时停车并鸣雾号","加速驶离该水域，尽快脱离雾区","关闭机器以静默方式等待对方通过"],"answer":[1],"explanation":"知识点：能见度不良时的安全航速与雾号运用。听到雾号应立即降至安全航速、必要时停车并鸣放雾号，故B正确。A保持原速不符安全航速要求。C加速驶离在视线不良时更危险。D关闭机器失去控制能力，且不应以静默等待。"},{"id":164,"type":"single","stem":"渔船在拖网作业时，发现拖网曳纲张力突然增大且船舶有被拖拽感，正确的第一步处置是","options":["立即加大主机转速，强行拖过障碍","迅速停车并松放曳纲，防止船舶被拖横","保持原速并操舵使船首对准张力方向","立即绞收曳纲，把网具收上来检查"],"answer":[1],"explanation":"知识点：拖网挂底或受阻时的应急操纵。张力突增多因网具挂底，应停车并松放曳纲，避免船舶被拖横或网具破断，故B正确。A强行加大车速会拉断曳纲或损坏网具。C保持原速仍会持续受力，方向也未必正确。D立即绞收会使张力进一步增大。"},{"id":165,"type":"single","stem":"渔船在航行中舵机失灵，船长决定采用应急舵操纵，正确的做法是","options":["立即停车，待船完全停住后再修复舵机","改用应急舵，同时减速并通知机舱抢修","保持原速，仅靠左右主机转速差控制航向","抛下船首锚，利用锚链张力使船转向"],"answer":[1],"explanation":"知识点：舵机失灵时的应急操纵。应改用应急舵并减速、通知机舱抢修，故B正确。A停车后失去舵效和航向控制，在狭窄或危险水域更危险。C双车差速仅适用于双车船，且不能替代舵的作用。D航行中抛首锚易造成断链或船体损伤。"},{"id":166,"type":"single","stem":"渔船在冰区航行时，为减少船体与冰的挤压损伤，通常应采取的操纵方法是","options":["以高速冲撞薄冰，快速通过冰区","保持低速，选择冰隙或薄冰处缓慢通过","紧贴大块浮冰边缘，借冰面阻挡风流","停车随冰漂流，等待破冰船引领"],"answer":[1],"explanation":"知识点：冰区航行的航法与航速选择。应低速、选择冰隙或薄冰处通过，减少船体挤压，故B正确。A高速冲撞会损伤船体。C紧贴浮冰易被冰挤压挤伤。D停车随冰漂流易被冰困住并失去操纵能力。"},{"id":167,"type":"single","stem":"渔船在航行中发现机舱排烟管附近有油污并冒烟，轮机值班人员正确的处置顺序是","options":["先报告船长，再等船长指令后处理","先切断油源并灭火，同时报警并报告驾驶台","先关闭主机，再慢慢清理油污并观察","先加大通风，把烟雾排出去再检查油源"],"answer":[1],"explanation":"知识点：机舱火灾隐患的应急处置顺序。应先切断油源、灭火，同时报警并报告驾驶台，故B正确。A等待指令会延误灭火时机。C关闭主机后清理油污未先切断油源，可能复燃。D加大通风会助燃，且未先切断油源。"},{"id":168,"type":"single","stem":"渔业船舶主机在航行中突然出现转速下降且排气冒黑烟，轮机长首先应当采取的措施是","options":["立即停车拆检喷油器","降低负荷并检查燃油供给系统","加大油门维持原转速","切换备用燃油舱继续航行"],"answer":[1],"explanation":"知识点为柴油机故障判断：转速下降伴黑烟多因燃烧不完全，常见于燃油供给异常或负荷过大。正确处置是先降负荷并检查燃油系统；立即停车拆检喷油器属于未判明原因就大拆，加大油门会加剧燃烧恶化，切换备用燃油舱未针对燃烧不良原因，均非首要措施。"},{"id":169,"type":"single","stem":"渔船在港口锚地起锚后发现锚链缠绕他船锚链，此时正确的处置是","options":["加大主机功率强行拖开","立即抛下另一只锚固定船位","停止绞锚并派潜水员下水探摸","松出锚链后缓慢改变船位解缠"],"answer":[3],"explanation":"知识点为锚链缠绕处置：应通过松链、改变船位方向逐步解缠，避免损伤锚链。强行拖开会拉断锚链或损伤船体；抛另一只锚可能造成双锚缠绕；未探明情况即派潜水员下水风险大且非首选；松出锚链后缓慢改变船位是正确做法。"},{"id":170,"type":"single","stem":"渔业船舶在避让渔船群作业时，判断是否存在碰撞危险的主要依据是","options":["他船是否显示作业号灯","罗经方位是否明显变化","两船距离是否大于1海里","他船航速是否高于本船"],"answer":[1],"explanation":"知识点为碰撞危险判断：最可靠依据是罗经方位有无明显变化，方位不变说明存在碰撞危险。作业号灯只表明船舶状态，距离大小不单独决定危险，他船航速高低与碰撞危险判断无直接决定关系。"},{"id":171,"type":"single","stem":"渔业船舶在浅水区航行时出现舵效变差、船体下沉的现象，主要原因是","options":["船底与海底间水流加速导致压力降低","海水密度减小使浮力下降","主机功率因水温升高而下降","舵叶被水草缠绕阻力增大"],"answer":[0],"explanation":"知识点为浅水效应：船底与海底间隙小，水流加速、压力降低，产生下沉和舵效变差。海水密度变化、主机功率变化、舵叶缠绕均不能解释浅水区普遍出现的下沉与舵效变差同时发生。"},{"id":172,"type":"single","stem":"渔船在风浪中航行时，为防止横浪导致横倾过大，船长应当优先采取的措施是","options":["保持原航向全速前进","调整航向使浪舷角减小","将压载水全部排空以增加稳性","关闭主机让船随浪漂流"],"answer":[1],"explanation":"知识点为风浪中船舶操纵：调整航向使浪舷角减小可降低横浪冲击。保持原航向全速会加剧横摇；排空压载水会降低稳性；关闭主机随浪漂流丧失控制，均不正确。"},{"id":173,"type":"single","stem":"渔业船舶轮机长在交接班时发现滑油压力低于正常值但尚未报警，正确的处理是","options":["记录后交班由下一班观察","立即查明原因并处理后再交班","先提高滑油温度再看压力","补充滑油至油位上限即可"],"answer":[1],"explanation":"知识点为轮机值班交接：发现异常应查明并处理后方可交班。仅记录交班可能延误故障；提高油温不能解决压力低问题；补油至上限未针对压力低原因，均不正确。"},{"id":174,"type":"single","stem":"渔船在狭水道内与他船对遇，且本船为顺水道方向航行，避让责任正确的是","options":["逆水道方向航行的船让路","顺水道方向航行的船让路","两船均向右转向通过","两船均向左转向通过"],"answer":[0],"explanation":"知识点为狭水道对遇避让：逆水道方向航行的船舶应让路。顺水道船为直航船；两船同向转向不符合规则；对遇时应各自向右转向，但让路责任在逆水道船。"},{"id":175,"type":"single","stem":"渔业船舶在夜间航行时发现正前方有一盏白光和绿灯，判断该船可能是","options":["锚泊中的渔船","正在捕鱼的拖网船","在航的机动船","搁浅的船舶"],"answer":[2],"explanation":"知识点为号灯识别：在航机动船显示桅灯、舷灯和尾灯，正前方可见白光和绿灯。锚泊船显示锚灯，拖网渔船显示作业号灯组合，搁浅船显示特定号灯，与白光加绿灯组合不符。"},{"id":176,"type":"single","stem":"渔船在靠泊过程中，发现码头前沿有横流，船长应当采取的正确操纵方法是","options":["以较大角度快速靠拢码头","保持船身与码头平行缓慢靠拢","先抛外档锚再逐步靠拢","加大主机功率顶流靠泊"],"answer":[2],"explanation":"知识点为靠泊操纵：有横流时先抛外档锚可控制船位和靠拢速度。大角度快速靠拢易碰撞；平行缓慢靠拢在横流下难以控制；加大功率顶流靠泊风险大，均非正确做法。"},{"id":177,"type":"single","stem":"渔业船舶在能见度不良水域航行时，发现来船鸣放一长声，本船应采取的避让行动是","options":["立即右转并鸣放一短声","保持航向航速并鸣放一长声","减速并鸣放两长声","停车并鸣放三短声"],"answer":[1],"explanation":"知识点为《国际海上避碰规则》声号与能见度不良时的行动规则。能见度不良时一长声表示机动船在航对水移动，本船应保持航向航速并鸣放一长声以表明自身动态。立即右转并鸣放一短声是互见中的操纵声号，不适用于能见度不良；减速并鸣放两长声不是规范声号组合；停车并鸣放三短声表示正在倒车，与本题情境不符。"},{"id":178,"type":"single","stem":"渔业船舶在港口水域锚泊时，白天应显示的号型是","options":["一个球体","一个圆锥体","一个圆柱体","一个菱形体"],"answer":[0],"explanation":"知识点为锚泊号型。船舶锚泊时白天应在船首最易见处显示一个球体。圆锥体用于某些特定作业船舶；圆柱体不是锚泊号型；菱形体用于拖网渔船等特定显示，锚泊不适用。"},{"id":179,"type":"single","stem":"渔船主机运转中滑油压力突然降至报警值以下，值班轮机员首先应","options":["立即加大冷却水量","立即降速并停车检查","继续观察压力变化趋势","切换备用滑油泵后维持原速"],"answer":[1],"explanation":"知识点为主机滑油压力异常应急处置。滑油压力骤降可能导致轴瓦烧损，首先应降速并停车检查。加大冷却水量与滑油压力无关；继续观察会扩大事故；切换备用泵后维持原速可能掩盖故障，仍可能造成损坏。"},{"id":180,"type":"single","stem":"渔业船舶在海上遇险弃船时，船长最后离船前应确保","options":["携带航海日志和轮机日志","携带个人行李和证件","关闭所有水密门窗","启动应急发电机"],"answer":[0],"explanation":"知识点为弃船时船长职责。弃船时船长应最后离船，并确保携带航海日志、轮机日志等重要文件。携带个人行李不是首要职责；关闭所有水密门窗在弃船时不必全部关闭；启动应急发电机不是弃船前必须由船长完成的动作。"},{"id":181,"type":"single","stem":"渔船在雾航中雷达发现正前方有回波，且罗经方位不变、距离缩小，说明","options":["来船从右舷通过","来船从左舷通过","存在碰撞危险","来船已停车"],"answer":[2],"explanation":"知识点为雷达标绘与碰撞危险判断。罗经方位不变且距离缩小，说明本船与来船存在碰撞危险。来船从右舷或左舷通过时方位会变化；来船已停车不能由方位距离判断。"},{"id":182,"type":"single","stem":"渔船在起网作业时，螺旋桨被网具缠绕，正确的处置是","options":["立即加大主机转速摆脱网具","立即停车并通知机舱检查","保持原速继续起网","立即倒车退出网具"],"answer":[1],"explanation":"知识点为螺旋桨缠绕网具应急处置。应立即停车并通知机舱检查，防止损坏轴系。加大转速会加剧缠绕；保持原速继续起网会使缠绕更严重；立即倒车可能使网具进一步卷入。"},{"id":183,"type":"single","stem":"渔船在狭水道航行时，为避让横越船，本船已采取右转措施，此时应鸣放的声号是","options":["一短声","两短声","三短声","一长声"],"answer":[0],"explanation":"知识点为互见中操纵声号。向右转向应鸣一短声。两短声表示向左转向；三短声表示正在倒车；一长声不是操纵声号。"},{"id":184,"type":"single","stem":"渔船轮机长在值班中发现主机排烟温度异常升高，可能的原因是","options":["喷油量过少","冷却水温度过低","喷油定时过晚","扫气压力过高"],"answer":[2],"explanation":"知识点为主机排烟温度异常判断。喷油定时过晚会使燃烧滞后，排烟温度升高。喷油量过少会使排温降低；冷却水温度过低不会使排温升高；扫气压力过高通常使燃烧改善，排温不一定升高。"},{"id":185,"type":"multi","stem":"渔业船舶在航行中遇到下列哪些情况时，值班驾驶员应立即报告船长","options":["能见度突然变差","发现来船有碰撞危险","主机转速轻微波动","航向偏离计划航线较大","收到气象传真图"],"answer":[0,1,3],"explanation":"知识点为值班驾驶员报告船长的情形。能见度突然变差、发现来船有碰撞危险、航向偏离计划航线较大均应立即报告船长。主机转速轻微波动可先观察记录；收到气象传真图属于正常接收，不必立即报告。"},{"id":186,"type":"single","stem":"渔业船舶在狭水道中航行时，为减小船尾偏向一侧的倾向，应当把船位保持在航道中线的哪一侧？","options":["航道中线的右侧","航道中线的左侧","航道中线的哪一侧都一样","靠近浅水的一侧"],"answer":[0],"explanation":"狭水道中船舶受岸吸与岸推共同作用，船首向深水一侧偏转、船尾向浅水一侧偏移，保持在中线右侧可使船位处于深水侧，减小偏转趋势；左侧与右侧受力方向相反，并非等价；靠近浅水一侧岸吸更强，偏转更明显。"},{"id":187,"type":"single","stem":"渔船在能见度不良水域中声号设备故障无法鸣放，此时正确的做法是？","options":["加速驶出雾区后再恢复正常航行","以安全航速行驶并加派瞭望继续航行","停船等待能见度好转再续航","沿岸边慢速航行以岸形定位"],"answer":[1],"explanation":"能见度不良时即使声号故障，也应保持安全航速、加强瞭望并谨慎驾驶，必要时停车；加速驶出会增加碰撞风险；盲目停船可能妨碍他船且未必安全；沿岸边航行反而增加搁浅与碰撞危险。"},{"id":188,"type":"single","stem":"渔业船舶主机运转时，轮机长发现滑油压力表读数突然下降且伴有异常声响，首先应当？","options":["立即加大油门观察压力是否回升","立即停车检查并报告驾驶台","继续运行并记录压力变化","切换到备用滑油泵继续航行"],"answer":[1],"explanation":"滑油压力突降伴异响通常意味着润滑系统失效或轴承损坏，应立即停车检查以防烧瓦；加大油门会加剧损坏；继续运行会扩大故障；切换备用泵只是临时措施，不能替代停车排查。"},{"id":189,"type":"single","stem":"渔船在港内掉头时，若水域受限需要利用螺旋桨横向力协助，单车右旋桨船通常采用？","options":["进车右满舵配合倒车左满舵","进车左满舵配合倒车右满舵","仅用正车满舵反复调整","仅用倒车并保持正舵"],"answer":[0],"explanation":"右旋单车船掉头常利用进车右满舵使船首右转、倒车左满舵利用排出流横向力使船尾左摆，从而在小水域完成掉头；其余组合方向相反或缺少横向力配合，效率低甚至适得其反。"},{"id":190,"type":"single","stem":"渔业船舶在航行中遇到他船显示垂直两盏白灯，说明该船？","options":["正在从事拖网作业","操纵能力受到限制","正在从事捕鱼作业","处于锚泊状态"],"answer":[1],"explanation":"垂直两盏白灯是操纵能力受到限制的船舶号灯；拖网渔船显示的是上绿下白两盏环照灯；捕鱼作业显示红白灯；锚泊船显示的是前锚灯与后锚灯。"},{"id":191,"type":"single","stem":"渔船在狭窄水道中追越前船时，追越船应当从被追越船的哪一侧通过？","options":["任意一侧均可，只要鸣放声号","被追越船的左舷一侧","被追越船的右舷一侧","必须从被追越船正后方通过"],"answer":[2],"explanation":"狭水道追越应尽可能从被追越船左舷通过，并鸣放追越声号取得同意；任意一侧不符合规则；右舷一侧通常是来船航道，风险更大；正后方通过无法完成追越。"},{"id":192,"type":"single","stem":"轮机部在进行主机吊缸检修前，除切断启动空气外还必须完成的关键操作是？","options":["关闭滑油泵并放空管系","关闭燃油阀并挂检修牌","打开示功阀并盘车数转","关闭海水阀并放尽冷却水"],"answer":[1],"explanation":"吊缸前必须切断燃油供给并挂牌上锁，防止误启动或燃油喷入；仅关滑油泵不能防止启动；开示功阀盘车是检修步骤而非防误启动措施；关海水阀放冷却水与防误启动无关。"},{"id":193,"type":"single","stem":"渔船在作业中有人落水，驾驶台首先应当采取的行动是？","options":["立即停车并抛投救生圈","立即满舵回转搜救","立即发出求救信号","立即组织人员下水施救"],"answer":[0],"explanation":"人落水后应立即停车并向落水者一侧抛投救生圈，防止螺旋桨伤人并标记位置；满舵回转需在停车后进行；先发求救信号会延误现场处置；贸然下水施救易造成更多伤亡。"},{"id":194,"type":"single","stem":"渔业船舶在进出港时，船舶富余水深一般应保持不小于吃水的？","options":["百分之五","百分之十","百分之二十","百分之三十"],"answer":[2],"explanation":"进出港浅水区通常要求富余水深不小于吃水的百分之二十，以应对涌浪与下沉量；百分之五和百分之十偏小，触底风险大；百分之三十过于保守，多数港口不具备条件。"},{"id":195,"type":"single","stem":"渔船在海上遇到主机突然熄火无法启动，且海况逐渐恶化，船长最恰当的处置是？","options":["立即组织抢修并继续漂航等待","立即抛锚固定船位防止漂移","立即发出遇险报警并做好弃船准备","立即启动辅机维持航速返港"],"answer":[2],"explanation":"主机失效且海况恶化时，船舶失去动力面临失控危险，应立即发出遇险报警并做好弃船准备；继续漂航抢修风险高；深水抛锚通常无法固定；辅机不能驱动主机维持航速。"},{"id":196,"type":"multi","stem":"渔业船舶在雾航中，下列哪些措施符合安全要求？","options":["开启雷达并保持远距离量程","按规定鸣放雾号并派人瞭望","以安全航速行驶并随时准备停车","为赶船期适当提高航速","关闭航行灯以减少干扰"],"answer":[0,1,2],"explanation":"雾航应开启雷达、鸣放雾号、派瞭望并以安全航速行驶，随时准备停车；提高航速会增大碰撞风险；关闭航行灯违反避碰规则，会削弱他船对本船的判断。"},{"id":197,"type":"single","stem":"渔船在狭水道中航行，你船为机动船且沿水道走向行驶，前方有一艘正在从事捕鱼的船舶显示舷灯和尾灯，此时你船应采取的避让行动是","options":["鸣笛一长声后从捕鱼船右舷通过","减速并从未被渔具伸展一侧通过","保持航向从捕鱼船左舷加速通过","停车等待捕鱼船收网后再行"],"answer":[1],"explanation":"知识点为狭水道内渔船的避让义务：从事捕鱼的船舶在狭水道内不应妨碍只能在该水道内航行的船舶通行，但机动船仍应尽可能避免妨碍其作业并从未被渔具伸展的一侧低速通过。正确项符合'避让渔具伸展方向'的操纵要求；错误项A鸣笛后从右舷通过可能直接驶入渔具伸展区；错误项C加速通过会加剧碰撞风险且方向选择未考虑渔具；错误项D停车等待并非法定义务，且在狭水道内停车易造成拥堵或失控。"},{"id":198,"type":"single","stem":"渔船航行中主机突然出现转速下降、排气冒黑烟并伴有敲缸声，轮机长首先应判断的最可能原因是","options":["燃油滤器堵塞导致供油不足","螺旋桨缠绕异物使负荷突增","喷油定时过迟使后燃严重","冷却水温过高引起缸套变形"],"answer":[1],"explanation":"知识点为柴油机异常工况的故障定位。转速下降伴排气冒黑烟和敲缸声，说明燃烧恶化且负荷异常增大，螺旋桨缠绕异物会直接造成负荷突增，是航行中常见的突发原因。错误项A燃油滤器堵塞多表现为转速下降但排气冒白烟或淡烟，敲缸声不典型；错误项C喷油定时过迟会引起排气温度升高、冒黑烟，但转速不会突然大幅下降且敲缸声不明显；错误项D冷却水温过高通常先表现为水温报警，敲缸声出现时已属严重后果，不是首要判断。"},{"id":199,"type":"single","stem":"渔船在雾中航行，雷达显示正前方约2海里处有一回波，同时听到该方向传来一长声，你船应采取的操纵是","options":["保持航向并加速驶离该回波区域","立即右转并鸣放一短声以示意图","减速至能维持舵效并做好停车准备","向左转向以增大与来船通过距离"],"answer":[2],"explanation":"知识点为雾中避碰规则：听到一长声说明来船为机动船且正在航行，雷达回波距离较近时，最稳妥的措施是减速至能维持舵效并备车，以便随时停车。错误项A加速会缩短反应时间；错误项B右转并鸣短声属于互见中的操纵意图表达，雾中不适用；错误项D向左转向在方位不明时可能使局面恶化。"},{"id":200,"type":"single","stem":"渔船在港口锚地起锚时，锚链出现剧烈抖动并伴有船首偏转，下列处置措施中正确的是","options":["加大主机转速强行拉起锚链","立即松出锚链待抖动消失再起","停止起锚改用舵机调整船首向","继续收链并同时向另一舷压舵"],"answer":[1],"explanation":"知识点为起锚操作中锚链受力异常的处置。锚链剧烈抖动说明锚爪可能卡底或受力过大，正确做法是松出锚链缓解受力，待稳定后再缓慢起锚。错误项A强行拉起可能造成断链或损坏起锚机；错误项C停止起锚只调船首向不能解决锚链受力问题；错误项D继续收链并压舵会使锚链受力更复杂，易损伤设备。"},{"id":201,"type":"single","stem":"渔船在航行中发现舵机失灵，驾驶台应立即采取的措施是","options":["立即停车并显示失控信号","改用应急舵并通知机舱","加速用车钟配合转向","抛锚制动并等待救援"],"answer":[1],"explanation":"知识点为舵机失灵时的应急程序。舵机失灵后应立即切换应急舵操纵系统并通知机舱，以尽快恢复操舵能力。错误项A立即停车会在航道中丧失舵效，且未先尝试应急舵；错误项C加速无法解决舵失灵且增加风险；错误项D抛锚在深水或航道中可能损坏锚设备且不是首选。"},{"id":202,"type":"single","stem":"渔船在海上作业时船员落水，夜间且海况较差，船长决定立即救助，最先应做的是","options":["立即满舵回转并抛下救生圈","鸣放警报并派员登高瞭望","停车并发出人员落水警报","加速驶向落水者上风侧"],"answer":[2],"explanation":"知识点为人员落水应急程序。首要动作是停车并发出人员落水警报，既防止螺旋桨伤害落水者，又能迅速组织全船救助。错误项A立即满舵回转在夜间海况差时可能使船体压向落水者；错误项B派员瞭望应在警报发出后同步进行，不是最先动作；错误项D加速驶向上风侧会扩大搜寻距离且未先停车。"},{"id":203,"type":"single","stem":"渔船在浅水区航行时出现舵效变差、船体下沉、航速下降，这主要是由于","options":["船体兴波与海底相互作用增强","螺旋桨滑失比减小推力下降","舵叶空泡导致升力降低","海水密度减小使浮力下降"],"answer":[0],"explanation":"知识点为浅水效应。浅水区船体与海底距离减小，兴波和回流增强，导致舵效变差、船体下沉、航速下降。错误项B滑失比在浅水区通常增大而非减小；错误项C空泡多发生在高转速或舵角过大时，不是浅水航行的普遍现象；错误项D海水密度变化在浅水区可忽略，不是主因。"},{"id":204,"type":"single","stem":"渔船在靠泊过程中，若风从码头侧吹来，船长通常应采取的措施是","options":["船首先靠并用倒车控制靠拢速度","船尾先靠并利用风压贴拢码头","平行靠泊并加大主机转速","船首远离码头待风减弱再靠"],"answer":[0],"explanation":"知识点为靠泊操纵中风向的影响。风从码头侧吹来时，船首先靠可利用风压使船体逐渐贴拢码头，并用倒车控制靠拢速度。错误项B船尾先靠在吹拢风下易使船尾撞击码头；错误项C平行靠泊并加速会增加碰撞风险；错误项D船首远离码头会失去控制时机。"},{"id":205,"type":"single","stem":"渔船轮机长在值班中发现辅机电压不稳、频率波动，首先应检查的是","options":["辅机调速器与燃油供给系统","主配电板负载分配情况","辅机冷却水温度与压力","发电机轴承润滑与振动"],"answer":[0],"explanation":"知识点为辅机电压频率异常的故障排查。电压不稳、频率波动多与调速器或燃油供给不稳定有关，应首先检查调速器与燃油系统。错误项B负载分配异常会引起电压波动但通常伴随负载突变记录，不是首要检查点；错误项C冷却水温影响的是辅机过热保护，不会直接造成频率波动；错误项D轴承润滑与振动属于机械故障，通常伴随异响而非电压频率波动。"},{"id":206,"type":"single","stem":"渔船在航行中接到他船求救信号，你船决定前往救助，接近遇险船时应采取的措施是","options":["从上风侧接近并保持一定距离","从下风侧接近并靠帮接人","直接靠帮并立即转移人员","加速从船首方向接近"],"answer":[0],"explanation":"知识点为救助遇险船时的接近操纵。接近遇险船应从上风侧保持一定距离，便于观察和施救，防止碰撞和火灾蔓延。错误项B下风侧接近易受火灾、油污和漂流物影响；错误项C直接靠帮可能造成碰撞或人员伤亡；错误项D从船首方向接近易被遇险船船首撞击。"},{"id":207,"type":"single","stem":"渔船在夜间航行时发现前方有他船显示红色舷灯和白色尾灯，且方位不变、距离减小，你船应","options":["保持航向并加速通过","向右转向从他船船尾通过","向左转向从他船船首通过","鸣笛并继续直行"],"answer":[1],"explanation":"知识点为夜间避碰中的舷灯判断。看到红舷灯和尾灯说明来船位于你船右前方且正在远离，若方位不变距离减小，说明存在碰撞危险，应向右转向从其船尾通过。错误项A加速会加剧危险；错误项C向左转向会驶向对方船首；错误项D鸣笛不能消除碰撞危险。"},{"id":208,"type":"multi","stem":"渔船在恶劣天气航行时，为保障轮机设备安全，值班轮机员应做到的有","options":["定期检查主机滑油压力和温度","注意辅机负载并防止过载","关闭所有通风筒以防海水进入","记录主机转速和排烟颜色变化","发现异常立即停车并报告驾驶台"],"answer":[0,1,3],"explanation":"知识点为恶劣天气下轮机值班要点。正确项A、B、D分别对应滑油参数监控、辅机负载管理和主机运行记录，均为保障设备安全的基本要求。错误项C关闭所有通风筒会导致机舱缺氧和温度升高，应按规定保留必要通风；错误项E发现异常应立即报告驾驶台并按规程处理，并非一律立即停车。"},{"id":209,"type":"single","stem":"渔船在狭水道内追越前船时，为避免船吸现象导致两船碰撞，最有效的操纵措施是","options":["两船保持较大横距并降低追越船速度","追越船加速尽快通过前船正横位置","两船各自向相反方向转舵加大横距","追越船从前船船首方向斜插通过"],"answer":[0],"explanation":"船吸现象在追越时两船横距小、速度差大时最严重，保持较大横距并降低追越船速度可减小两船间流速差，减弱吸力；加速通过会加剧船吸；向相反方向转舵可能使船尾相互吸引碰撞；从前船船首斜插会导致紧迫局面。"},{"id":210,"type":"single","stem":"渔船在能见度不良水域航行时，听到他船雾号显示为两长声，说明来船状态是","options":["在航对水移动的机动船","在航不对水移动的机动船","失去控制的船舶","从事捕鱼的船舶"],"answer":[1],"explanation":"《国际海上避碰规则》规定，在航不对水移动的机动船应鸣放两长声；在航对水移动的机动船鸣放一长声；失去控制船鸣放两长声加两短声；从事捕鱼船鸣放一长声加两短声。"},{"id":211,"type":"single","stem":"渔船主机在额定转速下排烟呈黑色且排气温度偏高，最可能的原因是","options":["喷油提前角过大导致燃烧过早","喷油量过大导致燃烧不完全","进气温度过低导致着火延迟","排气阀开启过晚导致后燃"],"answer":[1],"explanation":"黑烟且排温高是燃烧不完全的典型表现，多因喷油量过大、雾化不良或超负荷；喷油提前角过大会导致敲缸和爆燃；进气温度低影响着火但通常冒白烟；排气阀开启过晚会造成后燃但排温高不一定冒黑烟。"},{"id":212,"type":"single","stem":"渔船在大风浪中航行，为减轻螺旋桨空转和飞车现象，正确的操纵方法是","options":["保持主机额定转速并频繁调整航向","适当降低主机转速并避免船首大幅上浪","加速通过浪区以缩短受浪时间","将舵置于正中并停车随浪漂流"],"answer":[1],"explanation":"大风浪中螺旋桨出水会导致飞车，适当降低转速并调整航向减小纵摇可减轻飞车和空转；保持额定转速会加剧飞车损坏主机；加速通过会增大纵摇幅度；停车漂流会失去舵效，横浪危险更大。"},{"id":213,"type":"single","stem":"渔船在港口水域锚泊时，发现本船走锚，值班船员首先应当采取的措施是","options":["立即报告船长并通知机舱备车","迅速松出全部锚链以增加抓力","立即起锚重新选择锚地抛锚","鸣放声号提醒周围船舶注意"],"answer":[0],"explanation":"发现走锚首先应报告船长并通知机舱备车，以便随时用车舵控制船位；松出全部锚链可能使锚链受力过大断裂；立即起锚在未备车情况下可能失控；鸣放声号是后续提醒措施而非首要动作。"},{"id":214,"type":"single","stem":"渔船轮机长在值班中发现主机滑油压力突然下降且油温升高，正确的第一步处置是","options":["立即降速并检查滑油泵和滤器","立即停车并拆检主机轴承","继续观察待压力稳定后处理","加大冷却水量降低滑油温度"],"answer":[0],"explanation":"滑油压力骤降且油温升高提示润滑系统故障，应先降速并检查滑油泵、滤器及油位，避免主机损坏；立即停车拆检可能造成不必要的停机损失；继续观察会扩大故障；加大冷却水不能解决压力下降的根本问题。"},{"id":215,"type":"single","stem":"渔船在雾中航行时，雷达发现右前方来船回波方位不变且距离逐渐减小，说明","options":["来船从左舷通过本船船首","来船与本船存在碰撞危险","来船正在向右转向远离本船","来船处于静止状态不构成危险"],"answer":[1],"explanation":"雷达回波方位不变而距离减小，说明两船处于碰撞几何态势，存在碰撞危险；方位不变不表示从哪舷通过；来船转向会使方位改变；静止船回波方位也会随本船运动改变，不能简单判定无危险。"},{"id":216,"type":"single","stem":"渔船在近岸作业时，船长发现海面出现向岸运动的异常退潮流且潮位异常升高，最可能是","options":["风暴潮来临前的征兆","正常半日潮的高潮时段","海底地震引发的海啸前兆","河口冲淡水形成的沿岸流"],"answer":[2],"explanation":"海啸前兆常表现为海水异常退去或异常升高，伴随异常潮流，应迅速向高处撤离；风暴潮多伴随强风气压骤降；正常高潮不会出现异常退潮流；河口冲淡水不引起潮位异常升高。"},{"id":217,"type":"single","stem":"渔船在航行中舵机失灵，应急操舵时应优先采用的方式是","options":["使用应急舵机由驾驶台直接操纵","派人到舵机间手动操舵","利用主机转速差控制航向","抛锚制动并等待救援"],"answer":[1],"explanation":"舵机失灵后应迅速转换应急操舵，通常派人到舵机间手动操舵最直接有效；应急舵机由驾驶台操纵需确认可用；利用主机转速差控制航向是辅助手段；抛锚在深水或航道上可能损锚且不能立即制动。"},{"id":218,"type":"single","stem":"渔船轮机员在检查主机曲轴箱时，发现曲轴箱防爆门被冲开，最可能的原因是","options":["曲轴箱内油气积聚遇明火爆炸","滑油压力过高导致油封损坏","冷却水漏入曲轴箱使油位升高","曲轴箱通风机停止运转"],"answer":[0],"explanation":"曲轴箱防爆门冲开通常是箱内油气积聚遇高温或明火发生爆燃，应检查通风和着火源；滑油压力高不会直接冲开防爆门；冷却水漏入使油位升高但不会冲开防爆门；通风机停转会积聚油气但不一定立即冲开。"},{"id":219,"type":"single","stem":"渔船在狭水道内与来船对遇，为避免碰撞，正确做法是","options":["各自向右转舵从对方左舷通过","各自向左转舵从对方右舷通过","保持航向并鸣放一短声示意","加速抢在来船之前通过"],"answer":[0],"explanation":"狭水道对遇时，两船应各自向右转舵，从对方左舷通过，这是避碰规则的基本要求；向左转舵会形成交叉危险；保持航向不协调易碰撞；加速抢行会加剧紧迫局面。"},{"id":220,"type":"multi","stem":"渔船在航行中发生搁浅后，船长组织脱浅前应重点检查的内容包括","options":["船体破损和进水情况","潮汐和底质条件","主机和舵机是否正常","船员是否全部在岗","渔获物是否受损"],"answer":[0,1,2],"explanation":"搁浅后脱浅前必须查明船体破损进水、潮汐底质以确定脱浅时机和方向、主机舵机是否可用以保证操纵能力；船员在岗是日常要求不是脱浅前专项检查；渔获物受损与脱浅安全无直接关系。"},{"id":221,"type":"single","stem":"渔船在狭水道中航行时，为避让突然横越船首的小船而不得不减速停车，此时对舵效影响最大的因素是","options":["螺旋桨排出流消失导致舵力下降","舵叶面积因船速降低而变小","舵机液压油温升高使转舵变慢","船体吃水增加使舵叶浸深加大"],"answer":[0],"explanation":"知识点：螺旋桨排出流对舵效的贡献。渔船多为单桨单舵，舵叶处于螺旋桨尾流中，停车后排出流消失，舵力主要靠船速产生的绕流，故舵效明显下降，正确项。错误项：舵叶面积是固定几何参数，不随船速变化；油温升高可能影响舵机但非停车直接主因；吃水增加反而增大舵叶浸深，不是舵效下降的原因。"},{"id":222,"type":"single","stem":"渔船在能见度不良水域使用雷达观测时，为尽早发现小目标渔船，正确的雷达调整做法是","options":["适当降低增益并抑制海浪干扰","将增益调至最大以增强回波","关闭海浪抑制以提高灵敏度","把量程固定在最大档位观测"],"answer":[0],"explanation":"知识点：雷达在雾航中探测小目标的调整原则。适当降低增益并合理使用海浪抑制（STC）可减少杂波、突出小目标回波，正确项。错误项：增益过大会使噪声淹没小目标；关闭海浪抑制在风浪天会满屏杂波；固定最大量程会降低近距离目标分辨力。"},{"id":223,"type":"single","stem":"渔船在港内掉头时，若想利用螺旋桨横向力帮助船首向右偏转，单桨右旋船通常应采取的操纵是","options":["短暂进车随即停车利用排出流","持续倒车并保持右满舵","正车前进同时左满舵","停车让船靠余速自然偏转"],"answer":[0],"explanation":"知识点：右旋单桨船的螺旋桨横向力（侧推效应）。短暂进车时排出流打在舵叶下部右侧，产生使船首右偏的横向力，配合舵可助掉头，正确项。错误项：持续倒车横向力使船尾左偏、船首右偏但难以控制且后退危险；正车左满舵是正常左转操纵，不针对横向力利用；停车余速偏转不可控。"},{"id":224,"type":"single","stem":"渔船主机运转中曲轴箱透气孔突然冒出大量浓白烟，同时曲轴箱压力升高，最可能的原因是","options":["气缸套裂纹使冷却水漏入曲轴箱","喷油器雾化不良燃烧不完全","机油滤清器堵塞油压过高","海水泵叶轮磨损冷却水量不足"],"answer":[0],"explanation":"知识点：曲轴箱窜气异常与缸套裂纹判断。缸套裂纹后冷却水进入曲轴箱，受热蒸发形成浓白烟并使箱内压力升高，正确项。错误项：喷油雾化不良表现为排烟异常和功率下降，不直接使曲轴箱冒白烟；滤清器堵塞影响油压，不产生白烟；海水泵磨损使冷却不足，与曲轴箱白烟无直接对应。"},{"id":225,"type":"single","stem":"渔船在避碰中，当两船交叉相遇且本船为让路船时，为避免形成紧迫局面，最优先采取的行动是","options":["尽早大幅度向右转向从他船船尾通过","保持航向航速由直航船避让","鸣放一短声后向左转向","减速至停车等待他船通过"],"answer":[0],"explanation":"知识点：交叉相遇局面让路船的行动原则。让路船应尽早、大幅度采取行动，通常向右转向从他船船尾通过，正确项。错误项：保持航向航速是把避让责任推给直航船；鸣一短声表示向右转向，但向左转向与之矛盾且可能加剧冲突；停车等待可能形成紧迫局面，不是最优先行动。"},{"id":226,"type":"single","stem":"渔船在风浪中航行发生横倾，为减小横摇幅度，正确的操船做法是","options":["将船首斜向波浪约两到三个罗经点","使船首正对波浪全速顶浪","使船尾正对波浪顺浪航行","将船横置于波浪中漂航"],"answer":[0],"explanation":"知识点：渔船在大风浪中的操船方法。将船首与波浪成约2~3个罗经点斜向顶浪可减轻横摇和拍击，正确项。错误项：正对波浪顶浪易造成剧烈纵摇和拍击；顺浪易发生尾淹和横甩；横浪漂航横摇最剧烈，最危险。"},{"id":227,"type":"single","stem":"渔船在拖网作业中主机负荷突然增大、转速下降并伴有排烟变黑，最可能的原因是","options":["网具挂底或网口大量进鱼使阻力骤增","海水温度升高使冷却效果变差","燃油滤清器轻微堵塞供油不足","舵机液压系统压力波动"],"answer":[0],"explanation":"知识点：拖网作业中主机负荷异常的判断。网具挂底或网口大量进鱼使拖曳阻力骤增，主机负荷增大、转速下降并冒黑烟，正确项。错误项：海水温度升高影响冷却，不直接使负荷骤增；燃油滤清器堵塞导致供油不足时转速下降但排烟多为变淡；舵机压力波动与主机负荷无直接关系。"},{"id":228,"type":"single","stem":"渔船在靠泊码头时，若码头在左舷且风力从右舷吹来，为安全靠泊通常应采取的操纵是","options":["以小角度接近并适时用左车顶住船首","大角度快速接近后急倒车","平行码头高速驶过后再倒车靠泊","船首先抵码头再慢慢横移过去"],"answer":[0],"explanation":"知识点：有吹开风时的靠泊操纵。风从右舷吹来使船被吹离码头，应以小角度接近，适时用左车（靠码头一侧）顶住船首，控制靠拢速度，正确项。错误项：大角度快速接近难以控制易撞码头；高速驶过后倒车靠泊风险大；船首先抵码头再横移易造成船首受损和船体横压。"},{"id":229,"type":"single","stem":"渔船轮机长在值班中发现主机排气温度各缸差异增大且个别缸明显偏高，首先应考虑的原因是","options":["该缸喷油量过大或喷油器滴漏","该缸进气阀开启过早","该缸活塞环磨损使压缩比升高","该缸冷却水通道堵塞使温度降低"],"answer":[0],"explanation":"知识点：各缸排气温度不均的故障判断。个别缸排温偏高多因该缸喷油量过大或喷油器滴漏导致后燃，正确项。错误项：进气阀开启过早影响换气但一般不使排温显著偏高；活塞环磨损使压缩比降低而非升高；冷却水通道堵塞会使该缸温度升高而非降低，方向相反。"},{"id":230,"type":"multi","stem":"渔船在雾中航行时，为满足避碰规则要求并降低碰撞风险，下列做法中正确的有","options":["按规定鸣放雾号并保持安全航速","开启雷达并安排专人瞭望","在狭水道中尽量靠近航道右侧行驶","听到他船雾号来自正横前时立即向左转向","关闭航行灯以免灯光干扰瞭望"],"answer":[0,1,2],"explanation":"知识点：雾航的综合安全措施。鸣放雾号、保持安全航速、雷达观测加专人瞭望、狭水道靠右行驶均符合规则，正确项。错误项：听到正横前雾号立即向左转向是盲目转向，可能正好转向来船；关闭航行灯违反规则且增加碰撞风险。"},{"id":231,"type":"single","stem":"渔船在狭水道中航行，你船为追越船，前方被追越船未按规定让路，此时你船应当采取的措施是","options":["鸣放追越声号后加速从右侧通过","保持安全距离跟随并鸣放声号提醒","从被追越船左舷以较大横距通过","减速并鸣放一长声等待对方让路"],"answer":[1],"explanation":"知识点：狭水道追越应保持安全距离并鸣放声号，被追越船未让路时追越船仍负避让责任。正确项：保持距离并鸣放声号提醒，符合追越船应谨慎驾驶的要求。A项加速从右侧通过违反追越船应保持安全距离的原则；C项从左侧通过仍需对方配合且横距不够安全；D项鸣放一长声是警告信号，不能替代保持安全距离跟随。"},{"id":232,"type":"single","stem":"渔船在港内进行主机备车时，轮机长发现主机滑油压力低于正常值但油温正常，下一步正确的处置是","options":["直接启动主机低速运行观察","先检查滑油滤器压差和油位","提高冷却水温度后再启动","向滑油系统补加燃油稀释"],"answer":[1],"explanation":"知识点：主机滑油压力偏低的常见原因排查。正确项：先检查滤器压差和油位，确认是否滤器堵塞或油量不足。A项带故障启动可能造成轴瓦损伤；C项冷却水温与滑油压力无直接因果关系；D项加燃油稀释滑油会降低粘度，加剧磨损。"},{"id":233,"type":"single","stem":"渔船在海上作业时舵机液压系统突然失压，舵角指示器停在右满舵位置，驾驶台首先应当","options":["立即切换应急舵并通知机舱","停车后派人到舵机房手动操舵","继续用右满舵航行至就近港口","加大主机转速以保持舵效"],"answer":[0],"explanation":"知识点：舵机失压应急程序。正确项：立即切换应急舵并通知机舱，是驾驶台第一时间应做的处置。B项派人到舵机房手动操舵是后续措施且需停车配合；C项带满舵航行无法控制航向；D项加大转速不能恢复舵效反而增加危险。"},{"id":234,"type":"single","stem":"渔船在雾中航行时雷达发现右前方来船回波，罗经方位变化不明显而距离持续减小，说明","options":["来船从本船船首前方通过","来船与本船存在碰撞危险","来船正在远离本船船尾","来船已停车不对水移动"],"answer":[1],"explanation":"知识点：雷达标绘判断碰撞危险。正确项：方位不变距离减小说明存在碰撞危险。A项通过船首方位应明显变化；C项远离船尾距离应增大；D项停车不对水移动不能仅凭方位距离判断。"},{"id":235,"type":"single","stem":"渔船主机运转中排气烟色突然变为浓黑且转速下降，轮机员应优先判断的故障环节是","options":["喷油器雾化不良或超负荷","海水冷却系统进入空气","滑油滤器堵塞导致油压高","起动空气瓶压力不足"],"answer":[0],"explanation":"知识点：主机排黑烟与转速下降的故障判断。正确项：黑烟加转速下降多因燃烧不完全，常见喷油器雾化不良或超负荷。B项冷却系统进空气影响的是冷却水温；C项滑油滤器堵塞表现为油压降低而非油压高；D项起动空气压力不足影响起动不影响运转。"},{"id":236,"type":"single","stem":"渔船在锚泊时值班驾驶员发现锚链突然受力绷紧且船首偏转，正确的处置是","options":["立即通知机舱备车并报告船长","松出更多锚链以缓解受力","迅速绞起锚链准备重新抛锚","关闭锚机刹车等待锚链自行缓解"],"answer":[0],"explanation":"知识点：锚泊值班异常处置。正确项：锚链绷紧偏转可能走锚，应立即备车报告船长。B项盲目松链可能加剧走锚；C项在未备车情况下绞锚危险；D项关闭刹车等待会丧失控制时机。"},{"id":237,"type":"single","stem":"渔船在避让从事捕鱼的船舶时，作为机动船在航的你船应当","options":["保持航向航速从渔船船首通过","尽可能早地采取避让行动让清渔船","要求渔船按避碰规则让路","从渔船船尾近距离快速通过"],"answer":[1],"explanation":"知识点：避碰规则中机动船与从事捕鱼船舶的避让关系。正确项：应尽早采取避让行动让清。A项从船首通过会妨碍渔船作业且危险；C项从事捕鱼船舶虽有一定权利但机动船仍应主动避让；D项船尾近距离通过不安全。"},{"id":238,"type":"single","stem":"渔船在浅水区航行时出现船首波增大、船体下沉、舵效变差的现象，这属于","options":["浅水效应导致兴波增强","船体进水导致吃水增加","主机功率突然下降","潮流顶推造成航速降低"],"answer":[0],"explanation":"知识点：浅水效应对船舶操纵的影响。正确项：浅水区兴波增强、船体下沉、舵效变差是典型浅水效应。B项船体进水会有进水报警和吃水持续增加；C项主机功率下降表现为转速下降；D项潮流顶推不改变兴波形态。"},{"id":239,"type":"single","stem":"渔船在航行中有人落水，驾驶台立即采取的最佳初始操纵是","options":["立即停车并满舵向落水者一侧旋回","继续前进并鸣放人员落水声号","减速后倒车直航寻找落水者","保持航向并释放救生艇搜寻"],"answer":[0],"explanation":"知识点：人员落水应急操纵。正确项：立即停车并向落水者一侧满舵旋回，可最快回到落水位置。B项继续前进会远离落水者；C项倒车直航不能快速回到落水点；D项保持航向释放救生艇会延误时机。"},{"id":240,"type":"single","stem":"渔船轮机长在交接班时发现主机缸套冷却水温度比正常偏高但未报警，正确的处理是","options":["记录后交班由下一班处理","交接班暂停并查明原因","先交班再通知驾驶台","调低冷却水温度设定值交班"],"answer":[1],"explanation":"知识点：轮机交接班异常处理。正确项：发现异常应暂停交接并查明原因。A项记录后交班可能延误故障处理；C项先交班再通知不符合交接责任；D项调整设定值掩盖异常。"},{"id":241,"type":"single","stem":"渔船在狭水道追越前船时，追越船应鸣放的声响信号是","options":["两长声后一短声","两长声后两短声","一长声后一短声","一长声后两短声"],"answer":[1],"explanation":"知识点：狭水道追越声号。追越船要求从前船右舷通过时应鸣两长声后一短声，要求从左舷通过时鸣两长声后两短声；两长声后两短声表示请求从前船左舷追越；一长声后一短声是转弯信号；一长声后两短声不是追越信号。"},{"id":242,"type":"single","stem":"渔船在海上航行时，舵机突然失灵，值班驾驶员首先应做的是","options":["立即通知机舱并显示失控号型","立即抛锚控制船位","立即倒车使船停止","立即向公司报告事故"],"answer":[0],"explanation":"知识点：舵机失灵应急程序。舵机失灵后应首先通知机舱抢修并按规定显示失控号型（白天垂直两个黑球、夜间两盏红环照灯），以警示他船；抛锚需根据水深和局面判断，不是首要动作；倒车可能加剧局面，不能盲目操作；向公司报告是后续事项。"},{"id":243,"type":"single","stem":"渔业船舶在港内靠泊时，若风从码头方向吹来，船舶应采取的靠泊方式是","options":["顶风靠泊，船首先靠","顺风靠泊，船尾先靠","横风靠泊，船身平行靠","抛开锚后船首靠泊"],"answer":[0],"explanation":"知识点：靠泊操纵中风向的影响。风从码头吹来即离岸风，船舶应顶风靠泊、船首先靠，利用风使船首贴向码头，便于控制靠拢速度；顺风靠泊船尾先靠会因风压使船首偏转难以控制；横风靠泊易使船身撞击码头；抛开锚后船首靠泊适用于有流或特殊条件，不是本题风向下的首选。"},{"id":244,"type":"single","stem":"渔船在海上航行时，发现本船右前方有一艘从事捕鱼的船舶显示垂直两盏红灯，本船应","options":["从该船左舷通过","从该船右舷通过","保持航向航速通过","鸣笛警告后直行"],"answer":[0],"explanation":"知识点：从事捕鱼船舶的号灯识别与避让。垂直两盏红灯表示该船正在拖网捕鱼，拖网渔船应给他船让路，但本船作为在航机动船也应主动避让，从其左舷通过可避开拖网延伸方向；从其右舷通过可能进入拖网范围；保持航向航速不负责任；鸣笛警告后直行不符合避碰要求。"},{"id":245,"type":"single","stem":"渔船主机运转中，曲轴箱透气孔突然大量冒白烟，轮机长首先应判断的是","options":["活塞环密封是否失效","冷却水是否进入曲轴箱","燃油是否进入曲轴箱","机油压力是否过高"],"answer":[1],"explanation":"知识点：曲轴箱冒白烟的故障判断。曲轴箱大量冒白烟通常说明冷却水漏入曲轴箱，受热蒸发形成水蒸气，应首先判断冷却水是否进入曲轴箱；活塞环失效主要表现为冒黑烟和窜气；燃油进入曲轴箱会使机油变稀但一般不冒白烟；机油压力过高不会导致曲轴箱冒白烟。"},{"id":246,"type":"single","stem":"渔船在航行中需要紧急倒车时，正确的操作顺序是","options":["先停油再换向最后倒车","先换向再停油最后倒车","先倒车再停油最后换向","先减速再换向最后停油"],"answer":[0],"explanation":"知识点：紧急倒车操作程序。紧急倒车应先停油使主机降速，再操作换向机构，最后倒车，避免高转速下换向损坏机器；先换向再停油会在高转速下换向造成机械冲击；先倒车再停油顺序颠倒；先减速再换向最后停油缺少停油环节，不能有效制动。"},{"id":247,"type":"single","stem":"渔船在海上遇到大风浪，为减轻横摇，可采取的措施是","options":["调整航向使船首斜迎浪","加速使船首顶浪","停车让船随浪漂流","调整压载使船尾下沉"],"answer":[0],"explanation":"知识点：大风浪中的操船措施。调整航向使船首斜迎浪可减轻横摇并保持一定航速；加速顶浪会使船首剧烈拍击；停车随浪漂流会失去控制并可能横浪；使船尾下沉会改变稳性且不能减轻横摇。"},{"id":248,"type":"single","stem":"渔船在航行中发现舵角指示器与实际舵角不一致，值班驾驶员应","options":["立即改用应急操舵并通知机舱","继续按指示器操舵观察","直接手动操舵到目的港","停车检查舵机后继续航行"],"answer":[0],"explanation":"知识点：舵角指示器失灵的处置。舵角指示器与实际舵角不一致说明操舵系统异常，应立即改用应急操舵并通知机舱检修；继续按指示器操舵会误判舵向；手动操舵到目的港不能解决指示错误；停车检查后继续航行若未修复仍存在隐患。"},{"id":249,"type":"single","stem":"渔船在雾中航行时，听到他船鸣放两长声，本船应判断来船","options":["正在向右转向","正在向左转向","正在追越本船","已经停车"],"answer":[1],"explanation":"知识点：雾中声响信号含义。两长声表示来船正在向左转向；一长声表示在航前进；两长声后一短声是追越请求；一长声后两短声不是停车信号。"},{"id":250,"type":"single","stem":"渔船在航行中机舱发生火灾，轮机长首先应做的是","options":["立即停车并切断油路","立即打开机舱门通风","立即用水扑灭火焰","立即启动消防泵供水"],"answer":[0],"explanation":"知识点：机舱火灾应急程序。机舱火灾应首先停车、切断油路和电源，防止火势扩大；打开机舱门通风会助燃；机舱油火不能用水直接扑救；启动消防泵供水是后续步骤，且需在切断油源后进行。"},{"id":251,"type":"single","stem":"渔船在狭水道内追越他船时，追越船应当从被追越船的哪一舷通过并鸣放何种声号","options":["从左舷通过，鸣两长一短声","从右舷通过，鸣两长两短声","从左舷通过，鸣两长两短声","从右舷通过，鸣两长一短声"],"answer":[3],"explanation":"知识点为狭水道追越声号与通过舷侧。追越船应鸣两长一短声表示拟从被追越船右舷通过，这是规则明确的声号含义；左舷通过应鸣两长两短声，故左舷配两长一短声错误；右舷配两长两短声是把声号与舷侧对应关系搞反；左舷配两长两短声虽声号正确但通过舷侧与题干要求的右舷不符。"},{"id":252,"type":"single","stem":"渔船在能见度不良水域航行时，若对是否存在碰撞危险存有怀疑，船长应当采取的首要措施是","options":["保持原航向航速并加强瞭望","立即转向避让并加速驶离","减速并必要时停车，以安全航速谨慎驾驶","鸣放雾号后继续按计划航线航行"],"answer":[2],"explanation":"知识点为能见度不良时的安全航速与谨慎驾驶义务。存有碰撞怀疑时应减速、必要时停车，用安全航速谨慎驾驶，这是避免紧迫局面的基本要求；保持原航向航速并加强瞭望不足以消除危险；立即转向加速可能加剧紧迫局面；鸣放雾号只是表明存在，不能替代减速措施。"},{"id":253,"type":"single","stem":"渔船在港口水域掉头时，若水域受限且风流影响较小，船长通常优先采用的掉头方法是","options":["利用舵效连续满舵掉头","抛单锚配合车舵掉头","借助拖轮顶推掉头","利用倒车惯性掉头"],"answer":[0],"explanation":"知识点为受限水域掉头操纵。水域受限但风流影响小时，利用舵效连续满舵掉头操作简便且可控；抛单锚掉头适用于水域更窄或需控制船位时；拖轮顶推需要外部协助，不是船长优先自操方法；倒车惯性掉头在受限水域易失去控制。"},{"id":254,"type":"single","stem":"渔船在航行中发现舵机失灵，船长决定采用应急舵操舵，此时驾驶台与舵机舱之间最可靠的联络方式是","options":["依靠驾驶台声号笛音长短约定","使用船内电话或对讲机直连","通过敲击船体传递节奏信号","由船员跑步往返口头传递"],"answer":[1],"explanation":"知识点为应急舵操作中的通信保障。应急舵操舵时船内电话或对讲机直连能实时准确传递舵令；声号笛音约定易受环境噪声干扰；敲击船体信号传递慢且易误解；跑步口头传递延误大，均不适合作为最可靠方式。"},{"id":255,"type":"single","stem":"渔船在海上遇到他船显示垂直两盏白灯，夜间判断该船可能处于何种状态","options":["正在从事拖网作业","操纵能力受到限制","正在从事捕鱼作业","失去控制但可移动"],"answer":[1],"explanation":"知识点为船舶号灯含义。垂直两盏白灯表示操纵能力受到限制的船舶；拖网作业渔船显示上绿下白两盏环照灯；从事捕鱼作业通常显示红白灯；失去控制但可移动显示垂直两盏红灯。"},{"id":256,"type":"single","stem":"渔船在近岸航行时发现前方有养殖筏架，船长判断风流压差较大，此时最稳妥的避让措施是","options":["保持航向从筏架下风侧通过","加大车速从筏架上风侧通过","减速并向上风侧调整航向留足余量","停车等待风流将船压离筏架"],"answer":[2],"explanation":"知识点为风流压差下的避让操纵。压差大时应减速并向上风侧调整航向，留足安全余量；从下风侧通过易被压向筏架；加速通过增加碰撞风险；停车等待可能使船被风流压向障碍物。"},{"id":257,"type":"single","stem":"渔船轮机长在值班中发现主机冷却水出口温度持续偏高，首先应当检查的环节是","options":["海水泵吸入滤器是否堵塞","燃油日用柜油位是否过低","主机滑油是否乳化变质","齿轮箱油压是否正常"],"answer":[0],"explanation":"知识点为主机冷却水温度异常排查。出口温度持续偏高首先查海水泵吸入滤器是否堵塞，因冷却水量不足最常见；燃油油位低影响燃烧不直接导致水温高；滑油乳化与冷却水温无直接关系；齿轮箱油压与主机冷却系统无关。"},{"id":258,"type":"single","stem":"渔船在雾中航行听到他船雾号显示在正横以前，且方位无明显变化，此时船长应当","options":["保持航向航速继续观察","立即减速并准备停车","加速驶离该方位","鸣放一长声示意对方让路"],"answer":[1],"explanation":"知识点为雾中避碰。听到正横以前雾号且方位不变，说明存在碰撞危险，应立即减速并准备停车；保持航向航速会加剧危险；加速驶离可能进入对方航路；鸣放一长声不能替代减速措施。"},{"id":259,"type":"single","stem":"渔船在海上进行拖网作业时，螺旋桨被渔网缠绕导致主机负荷突增，轮机长正确的第一步处置是","options":["立即停车并通知驾驶台","继续低速运转尝试甩脱","提高转速切断缠绕物","关闭冷却水等待网具松脱"],"answer":[0],"explanation":"知识点为螺旋桨缠绕应急处置。应立即停车并通知驾驶台，防止轴系和主机损坏；继续低速运转会加剧缠绕；提高转速可能扭断轴系；关闭冷却水与解缠无关且危害主机。"},{"id":260,"type":"single","stem":"渔船在进出港时使用雷达辅助瞭望，对雷达显示的小目标回波，船长应当","options":["仅凭雷达回波判断目标动态","结合视觉瞭望核实目标性质","忽略小目标继续按计划航行","将雷达量程调至最大以看清"],"answer":[1],"explanation":"知识点为雷达辅助瞭望的使用原则。雷达回波需结合视觉瞭望核实目标性质，避免误判；仅凭雷达回波可能把小渔船、浮标误判；忽略小目标不安全；量程调最大反而降低小目标分辨力。"},{"id":261,"type":"single","stem":"渔船在狭水道中航行时，为避让突然横越船首的小船，最有效的舵令操作是","options":["立即下令满舵并配合减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追越完成后立即向左转向回到原航道"],"answer":[0,1,2],"explanation":"知识点为狭水道追越规则。追越应征得被追越船同意，保持足够横距，且追越船负有避让责任。从右舷通过并非普遍要求，需视航道和他船动态确定；追越完成后立即向左转向可能切入他船船首，应确认安全并留出足够距离后再回归航道。"}]}