{"name":"渔业船员（内陆渔船船员）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":"内河渔船在狭窄航道与来船对遇时，按规定应当鸣放的声号是","options":["一长声","两长声","一长一短声","两长一短声"],"answer":[0],"explanation":"知识点为内河避碰声号中“对遇”的表示方法。一长声表示本船正在向右转向或要求来船向右让路，对遇时双方各鸣一长声协调左舷通过；两长声通常用于追越或要求被追越船让路；一长一短声不是对遇声号；两长一短声也不是标准对遇声号。","tier":"基础"},{"id":2,"type":"single","stem":"内陆渔船在湖泊中锚泊时，为防止走锚，值班船员最应持续关注的是","options":["锚链的受力松紧变化","船艏国旗的飘动方向","船舱内淡水舱的水位","甲板上渔网的堆放位置"],"answer":[0],"explanation":"知识点为锚泊值班时判断走锚的方法。锚链受力由紧变松或反复跳动，往往说明锚爪抓底状态改变或船在移动；国旗飘动只反映风向；淡水舱水位与走锚无关；渔网堆放属于作业整理，不反映锚泊安全。","tier":"基础"},{"id":3,"type":"single","stem":"小型内陆渔船柴油机启动后机油压力表长时间指示为零，正确的下一步处置是","options":["立即停机检查润滑系统","加大油门提高机油压力","继续运转观察几分钟再看","先给水箱加冷却水再运行"],"answer":[0],"explanation":"知识点为柴油机润滑系统异常处置。机油压力为零说明润滑可能失效，继续运转会烧瓦抱轴，应立即停机检查油底壳油位、滤清器和油泵；加大油门会加剧磨损；继续观察会扩大故障；加冷却水与机油压力无直接关系。","tier":"基础"},{"id":4,"type":"single","stem":"内河渔船在能见度不良的雾中航行时，除按规定发出雾号外，还应采取的措施是","options":["降低航速并加强瞭望","保持原速尽快驶出雾区","关闭航行灯以免反光","沿航道中心线加速通过"],"answer":[0],"explanation":"知识点为雾航安全措施。雾中应减速、加强视觉与听觉瞭望、必要时备车或择地锚泊；保持原速或加速都会缩短反应时间；关闭航行灯违反显示规定且增加碰撞风险；沿中心线加速不能消除雾中风险。","tier":"基础"},{"id":5,"type":"single","stem":"内陆渔船在江河急流中逆流上行时，若需靠泊右岸码头，通常应采取的操船方式是","options":["以较小角度缓慢接近泊位","以较大角度快速冲向泊位","船艏正对码头全速靠拢","在码头下游掉头后顺流靠泊"],"answer":[0],"explanation":"知识点为急流靠泊操船要领。逆流靠泊应以小角度、慢速接近，利用水流阻滞作用控制余速；大角度快冲易撞码头；正对码头全速靠拢无法控制惯性；码头下游掉头顺流靠泊会增大速度和撞击风险。","tier":"基础"},{"id":6,"type":"single","stem":"渔船在夜间航行时发现右舷前方有一盏白灯和绿灯同时显示，判断来船可能是","options":["迎面驶来的机动船","正在向右转向的船","正在向左转向的船","锚泊中的船舶"],"answer":[0],"explanation":"知识点为号灯识别。白灯加绿灯组合通常出现在机动船右舷方向，若同时看到舷灯与桅灯，说明来船可能正对本船驶来；仅见绿灯不一定是转向；锚泊船显示锚灯而非航行舷灯；左转船应显示红灯。","tier":"进阶"},{"id":7,"type":"single","stem":"内陆渔船主机运转中冷却水温突然升高并伴有蒸汽排出，首先应当检查的是","options":["冷却水泵皮带是否打滑","燃油箱内柴油是否充足","蓄电池电解液液位","舵机液压油油位"],"answer":[0],"explanation":"知识点为柴油机冷却系统故障判断。水温骤升并冒蒸汽，常见原因是冷却水循环中断，皮带打滑会使水泵转速不足；燃油不足会导致熄火而非水温骤升；蓄电池与冷却无关；舵机液压油与主机冷却无关。","tier":"挑战"},{"id":8,"type":"single","stem":"渔船在湖泊作业时突遇雷暴大风，最合理的应急处置是","options":["就近选择背风岸滩避风","继续作业抢收渔获","加速驶向湖心避风","关闭主机任船漂流"],"answer":[0],"explanation":"知识点为恶劣天气应急。雷暴大风时应尽快驶向背风岸滩或港湾避风，人员穿救生衣；继续作业会增大翻船风险；湖心风浪更大；关闭主机漂流会失去控制，易触礁或翻沉。","tier":"进阶"},{"id":9,"type":"single","stem":"某渔船在河道中主机突然熄火且无法启动，船正被水流推向一座桥墩，此时首先应","options":["立即抛下船艏锚制动","跳入水中游向岸边","用竹篙猛撑桥墩","启动备用发电机供电"],"answer":[0],"explanation":"知识点为失控船应急操作。主机熄火失控时，应尽快抛锚或利用缆绳固定以减缓漂移；跳水可能溺水；猛撑桥墩可能使船体反弹或人员落水；启动发电机不能改变船舶漂移趋势。","tier":"进阶"},{"id":10,"type":"single","stem":"内陆渔船在浅水区航行时，为防止螺旋桨打坏或吸入泥沙，应重点控制的是","options":["主机转速和船底富余水深","船上人员站立位置","渔网颜色和长度","驾驶室门窗开闭状态"],"answer":[0],"explanation":"知识点为浅水区航行操作。浅水区应降低转速、保持足够富余水深，防止螺旋桨触底或吸入泥沙；人员站立位置影响稳性但不直接防桨损；渔网颜色长度与桨损无关；门窗状态不影响吃水。","tier":"基础"},{"id":11,"type":"single","stem":"渔船消防中，扑救机舱内燃油起火时，不宜直接使用的水基灭火方式是","options":["直流水柱冲击油面","泡沫覆盖油面","干粉灭火器喷射","二氧化碳灭火器喷射"],"answer":[0],"explanation":"知识点为油类火灾扑救。直流水柱冲击油面会使燃油飞溅扩散火势；泡沫覆盖可隔绝空气；干粉和二氧化碳均适用于油类火灾。","tier":"进阶"},{"id":12,"type":"multi","stem":"内陆渔船在靠离码头作业时，为保证人员和船舶安全，下列做法中正确的有","options":["靠泊前提前减速并试倒车","系缆时人员站在缆绳内侧","离泊时先收缆后动车","靠泊时用竹篙顶住码头缓冲"],"answer":[0,3],"explanation":"知识点为靠离码头安全操作。靠泊前减速试倒车可确认主机倒车性能；用竹篙顶码头可缓冲并调整船位。系缆时人员应站在缆绳外侧，防止缆绳断裂抽打；离泊通常应先动车使船略有离开趋势再解缆，先收缆后动车易使船失控。","tier":"挑战"},{"id":13,"type":"single","stem":"在内河湖泊水域驾驶渔船时，发现前方水面有大量水草漂浮且水流平缓，正确的驾驶处置方法是","options":["低速从水草边缘绕过并保持舵效","加速从水草密集处直接冲过","停车等待水草自行漂离航道","沿水草带中线全速通过"],"answer":[0],"explanation":"知识点为内陆水域避障驾驶。水草会缠绕螺旋桨、堵塞冷却水进口，应低速从边缘绕行并保持舵效。加速冲过容易缠桨；停车等待可能长时间阻塞航道且船位漂移；沿中线全速通过正是最容易缠桨的做法。","tier":"进阶"},{"id":14,"type":"single","stem":"内陆渔船柴油机运转中水温表指针突然进入红区，首先应采取的处置措施是","options":["立即停机并打开水箱盖检查","降速运行并检查冷却水循环","加大油门提高水泵转速降温","关闭海水阀减少冷却水流量"],"answer":[1],"explanation":"知识点为柴油机过热处置。先降速运行并检查冷却水循环，可判断是水泵、滤网还是节温器问题。立即停机热应力大且无法观察；加大油门会加剧过热；关闭进水阀会进一步断水升温。","tier":"进阶"},{"id":15,"type":"single","stem":"内陆渔船在狭窄河道顺流下行驶时，与逆流上驶船舶相遇，正确的避让原则是","options":["逆流船让顺流船","顺流船让逆流船","两船均向右转向","两船均向左转向"],"answer":[1],"explanation":"知识点为内河狭水道避让规则。顺流船操纵性相对较好、易于控制，应主动让逆流船。逆流船让顺流船会使其操纵困难；两船同向转向在狭窄河道易造成搁浅或碰撞。","tier":"基础"},{"id":16,"type":"single","stem":"渔船在湖泊作业时螺旋桨被渔网缠住，主机冒黑烟且转速下降，正确的处置顺序是","options":["先停车再挂空挡后下水清理","先减速再倒车尝试脱开网具","先加大油门冲开缠绕网具","先熄火并等待网具自行松脱"],"answer":[0],"explanation":"知识点为缠桨应急处置。应先停车、挂空挡，确认螺旋桨停转后再清理，防止伤人。减速倒车可能使网具缠得更紧；加大油门会损坏轴系；等待网具自行松脱不现实且可能漂入危险水域。","tier":"进阶"},{"id":17,"type":"single","stem":"内陆渔船在雷雨天气湖面作业时，正确做法是","options":["继续作业并收好金属渔具","停止作业就近靠岸避险","加速驶向湖心避风","在船上撑起金属桅杆避雷"],"answer":[1],"explanation":"知识点为恶劣天气避险。雷雨大风时应停止作业、就近靠岸避险。继续作业和驶向湖心会增大风险；撑起金属桅杆反而成为引雷体。","tier":"进阶"},{"id":18,"type":"single","stem":"渔船在江河中航行时舵机失灵，正确的应急措施是","options":["立即停车并抛锚控制船位","加大油门用螺旋桨差速转向","保持原速等待舵机恢复","迅速倒车使船尾向前漂移"],"answer":[0],"explanation":"知识点为舵机失灵应急。应立即停车并择机抛锚控制船位，防止失控漂移碰撞。加大油门在舵失灵时更危险；保持原速会继续冲向障碍；倒车在狭窄航道易造成横船。","tier":"基础"},{"id":19,"type":"single","stem":"内陆渔船船员在船上使用灭火器扑救油类火灾时，正确做法是","options":["用水柱直接冲击火焰中心","用干粉灭火器从火焰根部扫射","用湿麻袋覆盖后开窗通风","用沙土掩埋后启动主机"],"answer":[1],"explanation":"知识点为油类火灾扑救。干粉灭火器从火焰根部扫射可隔绝燃烧。水柱冲击会使油火飞溅扩散；湿麻袋覆盖后开窗会补氧复燃；启动主机会引入火源。","tier":"进阶"},{"id":20,"type":"single","stem":"渔船在内河雾中航行时，正确做法是","options":["保持原速并频繁鸣笛","减速鸣笛并加强瞭望","加速驶出雾区","关闭航行灯减少干扰"],"answer":[1],"explanation":"知识点为雾航规则。应减速、按规定鸣放雾号并加强瞭望。保持原速或加速会增大碰撞风险；关闭航行灯违反避碰要求。","tier":"基础"},{"id":21,"type":"single","stem":"内陆渔船在浅水区航行时，发现船体有异常振动且航速下降，最可能的原因是","options":["螺旋桨打到水底或缠绕杂物","主机供油量突然增大","舵角指示器读数偏差","船用雷达天线转速异常"],"answer":[0],"explanation":"知识点为浅水异常判断。浅水区异常振动伴航速下降多为螺旋桨触底或缠杂物。供油量增大不会引起振动；舵角指示偏差影响航向不影响振动；雷达转速与船体振动无关。","tier":"进阶"},{"id":22,"type":"single","stem":"渔船在湖泊作业时船员落水，本船应立即采取的首要措施是","options":["立即停车并向落水者一侧转舵","加速绕圈返回落水点","继续作业并呼叫他船救援","倒车使船尾靠近落水者"],"answer":[0],"explanation":"知识点为落水应急。应立即停车并向落水者一侧转舵，避免螺旋桨伤人并便于救援。加速绕圈和倒车靠近都可能使螺旋桨伤及落水者；继续作业会延误救援。","tier":"基础"},{"id":23,"type":"multi","stem":"内陆渔船在河道航行中主机突然熄火失去动力，船员应采取的正确措施包括","options":["立即抛锚或撑篙控制船位","显示失控信号并鸣放警报","检查燃油和进气是否堵塞","立即打开机舱盖板通风散热","在航道中央等待他船拖带"],"answer":[0,1,2],"explanation":"知识点为主机熄火应急。应控制船位、显示失控信号并排查燃油进气故障。机舱盖板在未确认安全时打开可能引发火灾或进水；在航道中央等待会阻塞航道并增加碰撞风险。","tier":"挑战"},{"id":24,"type":"single","stem":"在内河湖泊驾驶木质渔船时，发现舵链突然卡滞、舵叶无法回中，此时首先应做的操作是","options":["立即停车并挂倒车抑制船速","加大油门用舵力强行回中","保持航向并派人到船尾查看","迅速跳入水中推正舵叶"],"answer":[0],"explanation":"知识点为舵系故障应急处置。舵链卡滞时先停车并挂倒车可降低船速、减小舵力冲击，为检查争取时间；加大油门会使舵机负荷更大；保持航向继续航行会扩大偏航风险；跳水推舵叶属危险且无效操作。","tier":"进阶"},{"id":25,"type":"single","stem":"内陆渔船在狭窄河道掉头时，若船首已进入浅水区而船尾仍在深水，正确做法是","options":["用倒车把船尾先拉出浅水","继续满舵让船首冲上滩地","停车等待水流自然冲转船身","用竹篙从船首向河心撑"],"answer":[0],"explanation":"知识点为浅水区掉头操作。船首已进浅水时，用倒车把船尾拉出浅水可避免搁浅并重新调整方向；满舵冲滩会加重搁浅；停车等水流冲转不可控；从船首撑向河心力量不足且易使船首进一步偏入浅区。","tier":"进阶"},{"id":26,"type":"single","stem":"柴油机渔船在寒冷季节启动困难，压缩正常、供油正常，最应先检查的是","options":["喷油器雾化质量","蓄电池电压与启动转速","机油牌号是否过稀","海水泵叶轮是否磨损"],"answer":[1],"explanation":"知识点为柴油机低温启动条件。压缩与供油正常时，启动转速不足是最常见原因，故先查蓄电池电压与启动转速；喷油器雾化、机油牌号、海水泵叶轮虽可能影响，但不是低温启动困难的首查项。","tier":"进阶"},{"id":27,"type":"single","stem":"渔船在湖泊中夜航时，发现前方有一盏白色环照灯和红绿舷灯同时可见，应判断为","options":["一艘锚泊的渔船","一艘迎面驶来的机动船","一艘正在横越的帆船","一艘搁浅的工程船"],"answer":[1],"explanation":"知识点为内河避碰号灯识别。同时看到白环照灯与红绿舷灯，说明来船正对驶来，即迎面驶来的机动船；锚泊船通常显示锚灯；横越帆船号灯组合不同；搁浅船另有搁浅号灯。","tier":"进阶"},{"id":28,"type":"single","stem":"内陆渔船在汛期急流中顺流下驶，为保持舵效和减少横倾，应","options":["保持较高车速以增加舵力","停车让船随流漂下","使船身与流向保持较大夹角","将船尾迎流并低速下驶"],"answer":[0],"explanation":"知识点为急流顺流操船。保持较高车速可增加舵力、维持操纵性；停车会失去舵效；与流向夹角过大会加剧横倾；船尾迎流即倒行，在急流中更难控制。","tier":"基础"},{"id":29,"type":"single","stem":"渔船机舱内闻到浓重柴油味且发现高压油管接头渗油，正确处置是","options":["用抹布缠紧接头继续作业","停机熄火并通风后检修","打开机舱盖继续低速返航","往渗油处浇水稀释柴油"],"answer":[1],"explanation":"知识点为机舱燃油泄漏应急。停机熄火并通风后检修可防止火灾和爆炸；缠抹布、继续返航、浇水稀释都不能消除火源风险，且浇水会使油漂浮扩散。","tier":"挑战"},{"id":30,"type":"single","stem":"在内河渔船锚泊时，若发现锚链突然受力绷紧且船身偏荡加剧，最可能的原因是","options":["锚爪已插入河床底质","锚链长度不足或走锚","水流方向发生改变","船首吃水小于船尾"],"answer":[1],"explanation":"知识点为锚泊异常判断。锚链绷紧且偏荡加剧多为锚链长度不足或走锚；锚爪正常抓底时受力较稳定；水流改变通常引起缓慢偏转；吃水差主要影响浮态而非锚链受力。","tier":"挑战"},{"id":31,"type":"single","stem":"渔船在闸室等待过闸时，船体随闸室水位下降而搁坐在闸底门槛上，正确做法是","options":["立即加车试图冲出门槛","鸣笛通知闸门放水抬高水位","人员集中到船首压住船头","关闭所有舱门等待水位回升"],"answer":[1],"explanation":"知识点为过闸搁坐应急。应鸣笛通知闸门放水抬高水位使船浮起；加车冲门槛会损坏船底；人员集中船首会加剧倾斜；关闭舱门等待不能改变搁坐状态。","tier":"进阶"},{"id":32,"type":"single","stem":"蓄电池在渔船上的作用是","options":["启动柴油机并供给照明用电","直接驱动螺旋桨推进船舶","代替发电机向全船供电","储存海水用于压载调节"],"answer":[0],"explanation":"知识点为渔船电气系统。蓄电池用于启动柴油机、供照明及小功率用电；不能直接驱动螺旋桨；不能长期代替发电机；也不能储存海水。","tier":"基础"},{"id":33,"type":"single","stem":"内陆渔船在雾中航行时，听到他船鸣放一长声，应","options":["立即加速驶离该水域","减速并鸣放相应声号","停车等待雾散再走","保持原速继续航行"],"answer":[1],"explanation":"知识点为雾航声号与避让。听到一长声应减速并鸣放相应声号表明动态、加强瞭望；加速、停车等待、保持原速均不符合雾航安全要求。","tier":"基础"},{"id":34,"type":"single","stem":"渔船在江河中航行时，螺旋桨突然缠上渔网导致主机转速下降，正确处置是","options":["立即停车并挂空挡检查","加大油门扯断渔网","保持转速继续航行","迅速倒车甩掉渔网"],"answer":[0],"explanation":"知识点为螺旋桨缠绕应急。应立即停车挂空挡，防止缠紧损坏轴系；加大油门会拉断轴或损坏主机；继续航行会扩大故障；倒车可能使缠绕更紧。","tier":"挑战"},{"id":35,"type":"single","stem":"在内河航道驾驶渔船时，发现前方有横越航道的渡船正在载客，此时应采取的避让措施是","options":["加速从渡船船首通过","减速并鸣笛示意渡船让路","保持航向航速，等待渡船自行避让","减速停车，等渡船驶过后再通过"],"answer":[3],"explanation":"知识点：内河避让渡船的原则。渡船载客操纵受限且频繁横越航道，渔船应减速停车让其先行。加速从船首通过会因距离判断失误发生碰撞；鸣笛要求渡船让路不符合渡船优先通过的惯例；保持航向等待渡船避让把安全责任推给对方，风险极大。","tier":"挑战"},{"id":36,"type":"single","stem":"内陆渔船在狭窄弯曲河段顺流下行时，为便于控制船位，通常应将船速调整为","options":["比水流速度略慢，使舵效保持有效","与水流速度相同，随水漂流","比水流速度略快，留出舵效余量","尽量加大油门，快速通过弯段"],"answer":[2],"explanation":"知识点：弯曲河段顺流操纵。船速略快于水流才能产生舵效、及时转向。略慢于水流会失去舵效；与水流同速等于随水漂，无法操纵；加大油门在弯段难以控制船位，易冲上浅滩或对岸。","tier":"进阶"},{"id":37,"type":"single","stem":"内陆渔船在湖泊中遇到浓雾能见度不足50米时，正确的处置方式是","options":["保持原速并连续鸣笛航行","就近选择安全水域抛锚并显示号灯号型","沿原航线加速驶向码头","靠岸后用竹篙撑船继续作业"],"answer":[1],"explanation":"知识点：雾航安全处置。浓雾中能见度极低，应就近选择安全水域抛锚并按规定显示号灯号型。保持原速鸣笛仍可能碰撞；加速驶向码头风险更高；靠岸撑船继续作业同样存在碰撞和搁浅风险。","tier":"挑战"},{"id":38,"type":"single","stem":"渔船柴油机运转中机油压力突然降到零，正确的第一步处置是","options":["立即加大油门观察压力是否回升","立即停车检查，不得继续运转","先降低转速，维持怠速观察","关闭机油冷却器后继续航行"],"answer":[1],"explanation":"知识点：机油压力突降的应急处理。机油压力为零说明润滑系统可能失效，继续运转会烧瓦抱轴，必须立即停车检查。加大油门、维持怠速、关闭冷却器都会使柴油机在无润滑状态下继续运转，造成严重损坏。","tier":"进阶"},{"id":39,"type":"single","stem":"渔船在浅水区航行时，柴油机冷却水出口温度逐渐升高，最可能的原因是","options":["螺旋桨吸入泥沙导致负荷增大","冷却水泵叶轮磨损导致流量下降","浅水使船体阻力减小，转速升高","排气管浸水使背压增大"],"answer":[0],"explanation":"知识点：浅水航行对柴油机工况的影响。浅水区螺旋桨易吸入泥沙，负荷增大使冷却水温度升高。水泵叶轮磨损是长期问题，不会因进入浅水区而突然出现；船体阻力减小不会导致水温升高；排气管浸水与冷却水温无直接因果。","tier":"进阶"},{"id":40,"type":"single","stem":"内陆渔船在夜间锚泊时，应显示的号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继续航行到目的港再清理"],"answer":[1],"explanation":"知识点：螺旋桨缠绕处置。应立即停车挂空挡，防止水草越缠越紧损坏轴系。加大油门会加剧负荷；反转主机可能使水草缠得更紧或损坏齿轮箱；继续航行会导致主机过热或轴系损坏。"},{"id":59,"type":"single","stem":"内陆渔船在江河中遇到他船遇险有人落水，本船应当","options":["立即加速离开避免被缠上","在不危及本船安全下尽力救助","先拍照记录再决定是否施救","等海事部门到达后再行动"],"answer":[1],"explanation":"知识点：水上人命救助义务。在不严重危及本船和人员安全的前提下，应尽力救助遇险人员。加速离开违背救助义务；先拍照延误救助时机；等待海事部门会错过最佳救援时间。"},{"id":60,"type":"single","stem":"内陆渔船在湖泊中作业时突遇雷暴大风，最安全的处置是","options":["继续作业等风小再收工","立即收网并就近靠岸避风","将船驶向湖心开阔水域","加速返航穿越风区"],"answer":[1],"explanation":"知识点：恶劣天气应急。雷暴大风来临时应停止作业、收网就近靠岸避风。继续作业和驶向湖心都会使船暴露在风浪中；加速穿越风区风险极大。"},{"id":61,"type":"single","stem":"内陆渔船在狭窄河道顺流下航时，为保持舵效并便于随时停车，主机变速应保持在什么状态","options":["最低稳定转速并频繁脱挡滑行","中速以下且能随时换向的转速","额定转速以获取最大舵力","怠速运转并关闭冷却水"],"answer":[1],"explanation":"知识点：狭窄河道顺流下航的操纵要求。正确项：中速以下且能随时换向的转速，既保证舵效又留有停车换向余量。错误项：最低稳定转速频繁脱挡会失去舵效控制；额定转速在狭窄河道无法及时停车；怠速关闭冷却水会导致主机过热损坏。"},{"id":62,"type":"single","stem":"内陆渔船柴油机运转中机油压力突然降至报警值以下，首先应当采取的措施是","options":["立即加大油门观察压力是否回升","停车检查机油油位和油路","继续运转待靠岸后检修","关闭冷却水降低机温"],"answer":[1],"explanation":"知识点：柴油机机油压力异常处置。正确项：立即停车检查机油油位和油路，防止烧瓦。错误项：加大油门会加剧磨损；继续运转会损坏主机；关闭冷却水与机油压力无关且会引发过热。"},{"id":63,"type":"single","stem":"内陆渔船在湖泊夜间锚泊时，为让过往船舶判断本船位置和锚泊状态，应当显示","options":["仅显示一盏白色环照灯","显示锚灯并在必要时加示甲板照明","显示红绿舷灯和尾灯","关闭所有灯光避免干扰他船"],"answer":[1],"explanation":"知识点：锚泊号灯显示要求。正确项：显示锚灯并在必要时加示甲板照明，便于他船识别锚泊状态。错误项：仅白光环照灯不符合锚泊显示要求；红绿舷灯尾灯是航行灯；关闭灯光会使他船无法发现本船。"},{"id":64,"type":"single","stem":"内陆渔船在汛期江河中航行，遇到水面漂来的大面积水草和漂浮物时，正确的处置是","options":["加速冲过以免缠住螺旋桨","减速并从漂浮物下风侧缓慢绕行","停车等待漂浮物完全通过","靠近后用竹竿逐一挑开"],"answer":[1],"explanation":"知识点：汛期漂浮物避让操作。正确项：减速并从下风侧缓慢绕行，避免螺旋桨缠绕。错误项：加速冲过易使水草卷入螺旋桨；停车等待可能被水流推向漂浮物；靠近用竹竿挑开易使船体失控或人员落水。"},{"id":65,"type":"single","stem":"内陆渔船柴油机启动后，冷却水出口温度长时间低于正常范围且机体温度偏低，最可能的原因是","options":["节温器卡在开启位置","水泵叶轮磨损严重","冷却水通道堵塞","机油黏度过大"],"answer":[0],"explanation":"知识点：柴油机冷却系统故障判断。正确项：节温器卡在开启位置使冷却水始终大循环，机体升温慢。错误项：水泵叶轮磨损会导致水温偏高；水道堵塞会使水温偏高；机油黏度大影响润滑不影响冷却水温。"},{"id":66,"type":"single","stem":"内陆渔船在通过桥区水域时，为准确判断桥孔净空高度是否满足本船通过条件，应当以什么为参照","options":["本船桅顶最高点与桥孔下缘的目测余量","桥墩上的水位标尺读数加上本船吃水","本船驾驶室顶部与桥面底部的垂直距离","同向航行他船的通过情况"],"answer":[0],"explanation":"知识点：桥区通航净空判断。正确项：以本船桅顶最高点与桥孔下缘的目测余量判断最直接可靠。错误项：水位标尺加吃水不能反映桅顶高度；驾驶室顶部不是全船最高点；跟随他船不能确定本船实际净空。"},{"id":67,"type":"single","stem":"内陆渔船在风浪中航行时，船长发现船体横倾角明显增大且复位缓慢，正确的处置是","options":["立即向倾斜一侧压载以恢复平衡","减速并调整航向使船首斜迎浪","加速航行利用舵力扶正船体","全员集中到高舷一侧增加稳性"],"answer":[1],"explanation":"知识点：风浪中船舶稳性异常处置。正确项：减速并调整航向使船首斜迎浪，减小横摇力矩。错误项：向倾斜一侧压载会加剧横倾；加速不能扶正反而加剧横摇；人员集中高舷侧会使重心偏移导致倾覆。"},{"id":68,"type":"single","stem":"内陆渔船在冬季停航期间，为防止柴油机缸体冻裂，最稳妥的做法是","options":["放尽冷却系统中的全部冷却水","加入高浓度防冻液后不再排放","保持机舱温度在零度以上即可","每天启动主机运转十分钟"],"answer":[0],"explanation":"知识点：冬季柴油机防冻措施。正确项：放尽冷却系统全部冷却水，从根本上防止结冰胀裂。错误项：加防冻液需保证浓度且长期有效，未排空仍有冻裂风险；仅保温一旦断电仍会冻裂；每天启动不能保证夜间低温安全。"},{"id":69,"type":"single","stem":"内陆渔船在江河中抛锚时，锚链抛出长度一般应根据什么确定","options":["水深和风流情况","船体长度和主机功率","船员人数和作业方式","河宽和通航密度"],"answer":[0],"explanation":"知识点：锚泊出链长度确定因素。正确项：根据水深和风流情况确定出链长度，保证锚抓力。错误项：船体长度功率、船员人数作业方式、河宽通航密度均不是决定出链长度的直接因素，出链过短会导致走锚。"},{"id":70,"type":"single","stem":"内陆渔船船员在检查救生衣时，发现浮力材料完好但系带老化发脆，正确的处理是","options":["用绳索临时替换老化系带继续使用","立即停止使用并更换合格救生衣","将救生衣放在干燥处晾晒后继续使用","仅在近岸作业时使用该救生衣"],"answer":[1],"explanation":"知识点：救生衣维护与报废。正确项：系带老化影响穿着固定，应立即停用并更换合格救生衣。错误项：绳索临时替换不可靠；晾晒不能恢复老化系带强度；近岸作业同样存在落水风险，不能降低标准。"},{"id":71,"type":"multi","stem":"内陆渔船在雨季江河中航行，下列哪些做法有助于防止船舶走锚或走缆","options":["适当增加锚链抛出长度","安排人员轮流值班观察锚位","将缆绳系在船体强度足够的系缆桩上","在急流中把锚链全部垂直放下","锚泊后关闭所有号灯以节省电量"],"answer":[0,1,2],"explanation":"知识点：雨季锚泊防走锚措施。正确项：增加出链长度提高抓力；轮流值班及时发现走锚；缆绳系在足够强度的系缆桩上防止崩断。错误项：急流中锚链全部垂直放下失去水平抓力；关闭所有号灯会使他船无法发现本船。"},{"id":72,"type":"single","stem":"内陆渔船在狭窄河段顺流下行时，为便于随时靠泊和避让来船，驾驶操作应保持的航速状态是","options":["保持能随时控制住船位的安全航速","按最大油门快速通过缩短占道时间","熄火挂空挡随水流漂移省油","固定中速不再调整以稳定航向"],"answer":[0],"explanation":"知识点：内河航行安全航速要求。狭窄河段顺流下行时，水流助推使实际对地速度增大，必须保持能随时控制船位的安全航速，以便及时靠泊和避让。快速通过会缩短反应时间，易在弯道与来船形成紧迫局面；熄火漂移完全丧失控制能力，遇险无法制动或转向；固定中速不调整无法适应河段宽度、来船和碍航物的变化。"},{"id":73,"type":"single","stem":"内陆渔船在湖泊作业中，主机冷却水泵突然吸不上水，水温迅速升高，此时值班轮机员首先应做的操作是","options":["立即降速并停车检查吸水管路和滤器","继续运行观察水温是否会自行回落","加大油门提高转速冲开堵塞物","只补加冷却水不检查进水系统"],"answer":[0],"explanation":"知识点：主机冷却系统故障处置。吸不上水使冷却中断，继续运转会造成缸套、缸盖过热损坏，因此应立即降速停车，再检查吸水管、滤器是否堵塞或漏气。继续运行观察会扩大机损；加大油门会加剧过热；只补水不排查进水系统无法恢复冷却循环，故障依旧。"},{"id":74,"type":"single","stem":"内陆渔船在航道内与对遇船舶交会时，正确的避让行动是","options":["各自向右转向，从对方左舷通过","各自向左转向，从对方右舷通过","双方均减速后原地停车等待","谁船大谁先行，小船主动让路"],"answer":[0],"explanation":"知识点：内河船舶对遇避让基本规则。对遇局面下双方应各自向右转向，从他船左舷通过，形成一致的避让意图。向左转向会形成交叉冲突，容易碰撞；原地停车在航道内会阻塞交通并失去舵效；以船大船小决定先行没有规则依据，会造成判断混乱。"},{"id":75,"type":"single","stem":"渔船在湖泊中抛锚时，若发现锚链受力后突然松弛并伴有船体漂移，最可能的情况是","options":["锚已抓底但船舶发生走锚","锚链已完全断裂脱落","水深不足导致锚悬在水中","风流已完全消失船舶静止"],"answer":[0],"explanation":"知识点：锚泊异常判断。锚链先受力后突然松弛且船体漂移，说明锚在底质中未能抓牢而被拖动，即走锚。锚链断裂会有明显突然失载且无法再受力，与题意不全相符；水深不足锚悬水中不会出现先受力现象；风流消失船舶应保持稳定而非漂移。"},{"id":76,"type":"single","stem":"内陆渔船在夜间航行时，看到前方来船显示红、绿两舷灯和桅灯，判断该船正在","options":["朝本船方向驶来，需及早避让","与本船同向行驶，可保持航向","横向穿越本船船首，可加速抢过","静止锚泊，无需采取行动"],"answer":[0],"explanation":"知识点：号灯识别。同时看到来船红绿两舷灯和桅灯，说明该船船首正对本船方向驶来，形成对遇或接近对遇局面，应及早采取避让。同向行驶只能看到尾灯或看不到舷灯；横穿时应主要看到一盏舷灯；锚泊船显示锚灯而非航行桅灯和两舷灯。"},{"id":77,"type":"single","stem":"内陆渔船在汛期江河中航行，遇到前方水面出现成片漩涡和翻花水，正确处置是","options":["减速并择缓流一侧谨慎绕行通过","加速从漩涡中心快速冲过","保持原速原航向直接穿越","立即停车在漩涡上方下锚固定"],"answer":[0],"explanation":"知识点：汛期复杂流态处置。漩涡和翻花水区域流态紊乱，应减速并选择缓流一侧谨慎绕行，以保持舵效和船位控制。加速冲过会因流态突变导致偏航或倾覆；原速穿越同样风险大；在漩涡上方下锚会使船体受紊乱水流冲击，锚链受力方向多变，极易走锚或横倾。"},{"id":78,"type":"single","stem":"内陆渔船机舱内闻到焦糊味并看到电缆绝缘层冒烟，在未断电前正确处理是","options":["先切断该路电源再用干粉灭火器灭火","直接用水泼浇冒烟电缆降温","用湿棉被覆盖电缆隔绝空气","打开机舱门窗通风散烟后继续观察"],"answer":[0],"explanation":"知识点：电气火灾初期处置。电气火灾应先切断电源，再用干粉等不导电灭火剂灭火，防止触电和复燃。直接用水泼浇会导电伤人；湿棉被覆盖虽能隔绝空气但未断电仍可能触电，且不能消除电源；开窗通风会补充氧气助燃，且不切断电源无法根除火源。"},{"id":79,"type":"single","stem":"渔船在江河航行中舵机突然失灵，船舶开始偏转，驾驶员首先应采取的应急措施是","options":["立即减速并用主机差动控制航向","加大油门保持原航速等待修复","立即抛锚在航道中固定船位","关闭主机让船舶随流漂航"],"answer":[0],"explanation":"知识点：舵机失灵应急操纵。舵机失灵后应立即减速，利用双机差动或单机配合缆绳等控制航向，争取时间修复或择地锚泊。加大油门会加剧偏转和碰撞风险；在航道中直接抛锚可能阻碍他船并导致走锚；关闭主机随流漂航完全丧失控制，极易触碰碍航物。"},{"id":80,"type":"single","stem":"内陆渔船在冬季湖面作业，甲板结冰导致船员行走困难，最有效的防滑处置是","options":["在甲板通道铺设防滑垫并清除积冰","在冰面撒少量清水使其冻结平整","要求船员加快行走速度减少停留","只在船舷两侧加装临时扶手"],"answer":[0],"explanation":"知识点：冬季甲板防滑安全。铺设防滑垫并清除积冰可直接改善通道摩擦条件，是根本措施。撒清水会再结冰使冰层更厚更滑；加快行走反而增加滑倒风险；只加扶手不能解决脚下打滑问题，仍需配合清冰防滑。"},{"id":81,"type":"single","stem":"渔船在内河航道中因主机故障失去动力，在等待救援期间为防止碰撞他船，应优先","options":["显示失控信号并加强瞭望、用锚控制船位","关闭所有灯光以节省电力","让船员集中到船首增加前倾","解开所有缆绳减少阻力随流漂移"],"answer":[0],"explanation":"知识点：失控船应急措施。失去动力后应按规定显示失控信号，加强瞭望并用锚控制船位，提醒他船注意避让。关闭灯光会使他船难以发现本船；集中船首会增加前倾和上浪危险；解开缆绳随流漂移会失去控制，增加碰撞和搁浅风险。"},{"id":82,"type":"single","stem":"内陆渔船在通过桥孔时，发现桥下净空高度与本船桅杆高度接近，正确做法是","options":["减速确认净空足够后再低速通过","加速抢在来船前快速穿过桥孔","紧贴桥墩一侧通过以避开主流","在桥孔前抛锚等待水位下降"],"answer":[0],"explanation":"知识点：桥区航行安全。通过桥孔前应减速核实净空高度，确认安全后低速通过，以防桅杆碰撞桥梁。加速通过会缩短判断时间且难以控制；贴桥墩通过易受桥墩绕流影响偏航；在桥孔前抛锚会阻塞航道，且水位未必能在短时间内下降。"},{"id":83,"type":"single","stem":"内陆渔船在狭窄河道顺流下航时，为便于随时靠泊，驾驶员通常应把航速控制在什么状态","options":["略高于水流速度、保持舵效即可","与水流速度完全一致随水漂流","尽量加速抢在来船前通过","忽快忽慢以试探水深变化"],"answer":[0],"explanation":"知识点：狭窄河道顺流航行速度控制。顺流下航需保留一定舵效，航速略高于水流速度才能操舵避让和靠泊，故A正确。B与水流一致会失去舵效，船身随流漂移难以控制；C盲目加速在狭窄河道会缩短反应距离、增大碰撞风险；D忽快忽慢既干扰他船判断又易造成搁浅触礁。"},{"id":84,"type":"single","stem":"内陆渔船柴油机运转中机油压力表读数突然降到接近零，同时伴有异常敲击声，正确的第一步处置是","options":["立即减速并尽快停车检查","继续运转观察压力是否回升","加大油门提高转速冲一下","先加注机油再维持原来转速"],"answer":[0],"explanation":"知识点：柴油机机油压力骤降的应急判断。机油压力骤降伴敲击声说明润滑可能失效，应立即减速停车，故A正确。B继续运转会加剧轴瓦烧损；C加油门会进一步破坏油膜加速损坏；D在未查明原因前补油并保持转速，可能掩盖泄漏或油泵故障，仍会造成机损。"},{"id":85,"type":"single","stem":"内河渔船在能见度不良的雾中航行时，按规定应当采取的措施是","options":["鸣放雾号并减速谨慎驾驶","保持原速并按原航线行驶","开启远光灯照亮前方水面","靠航道一侧停车等待雾散"],"answer":[0],"explanation":"知识点：雾航安全操作。雾中应鸣放规定声号、减速并加强瞭望，故A正确。B保持原速在原航线行驶极易碰撞；C远光灯在雾中形成散射光幕反而看不清前方，且会干扰他船；D随意靠边停车可能占据航道或搁浅，且未保持规定声号，不符合雾航要求。"},{"id":86,"type":"single","stem":"内陆渔船在浅水区航行时舵效明显变差、船体有下沉感，驾驶员应当首先","options":["减速并寻找深水航道绕行","保持航速尽快冲过浅区","向浅水一侧压舵以借力","加大油门使船体抬升"],"answer":[0],"explanation":"知识点：浅水区航行效应。浅水使舵效下降、船体下沉，应减速并改走深水航道，故A正确。B加速会加剧下沉和吸底，可能搁浅；C向浅水一侧压舵会加深搁浅风险；D加大油门不能抬升船体，反而增大下沉量。"},{"id":87,"type":"single","stem":"内陆渔船靠泊码头时，一般应当以什么角度和速度接近泊位","options":["小角度缓速，先控制船身平行靠拢","大角度快速，船头先抵住码头","垂直码头全速，靠碰垫缓冲","任意角度，靠缆绳强行拉拢"],"answer":[0],"explanation":"知识点：靠泊操纵要领。靠泊应以小角度缓速接近，先使船身与码头趋于平行再靠拢，故A正确。B大角度快速易撞坏船头和码头；C垂直全速靠碰垫缓冲会损伤船体结构；D靠缆绳强行拉拢可能崩断缆绳或挤伤人员。"},{"id":88,"type":"single","stem":"内陆渔船在汛期江河中逆流上行，遇到主流与回流交界的水域，正确的操船做法是","options":["选择回流一侧缓流区上行","始终沿主流中心全速上行","在交界处停车随流漂移","频繁穿越主流以借势上行"],"answer":[0],"explanation":"知识点：汛期河流水流利用。逆流上行应利用岸边回流缓流区减少阻力，故A正确。B主流中心流速最大，全速上行耗油且推进效率低；C在交界处停车会失去舵效被水流带走；D频繁穿越主流会反复受横流冲击，容易失控。"},{"id":89,"type":"single","stem":"内陆渔船主机运转时排气管冒黑烟且功率下降，最可能的原因是","options":["喷油量过大或进气不足","机油温度偏低","冷却水温偏高","蓄电池电压不足"],"answer":[0],"explanation":"知识点：柴油机黑烟故障判断。黑烟通常因燃烧不完全，多由喷油量过大或进气不足引起，故A正确。B机油温度偏低与燃烧黑烟关系不大；C冷却水温偏高主要引起过热，不是黑烟主因；D蓄电池电压不足影响起动，不直接造成运转黑烟。"},{"id":90,"type":"single","stem":"内陆渔船在航行中发现船底漏水且进水量不大，船员应当优先采取的措施是","options":["一边排水堵漏一边报告并择地抢滩","立即全员弃船跳水逃生","关闭所有舱门任其进水","加速航行尽快返回出发港"],"answer":[0],"explanation":"知识点：渔船进水应急处置。进水不大时应排水堵漏、报告并选择浅滩抢滩，故A正确。B未到弃船程度时跳水逃生反而危险；C关闭舱门不堵漏不能控制进水；D带漏加速航行会加大进水和沉没风险。"},{"id":91,"type":"single","stem":"内陆渔船轮机员在起动柴油机前，发现冷却水泵皮带松弛打滑，正确的处理是","options":["调整皮带张紧度后再起动","先起动待水温升高再调整","在皮带上涂润滑油减磨","拆下皮带暂时不用水泵"],"answer":[0],"explanation":"知识点：柴油机起动前检查。皮带打滑会导致冷却水中断，应先调整张紧度，故A正确。B先起动会造成机体过热；C涂油会加剧打滑；D拆下皮带将失去冷却，直接导致过热损坏。"},{"id":92,"type":"single","stem":"某内陆渔船在湖泊作业时突遇雷暴大风，船舶横倾加剧，船长应当采取的处置是","options":["减速并调整航向使船首迎风","加速横穿风区尽快脱离","原地停车等待风力减弱","满舵转向背风侧全速行驶"],"answer":[0],"explanation":"知识点：大风浪中渔船操纵。横倾加剧时应减速并使船首迎风减小横倾力矩，故A正确。B加速横穿风区会加大横倾和上浪；C原地停车会失去舵效被风浪推横；D满舵全速转向背风易造成大角度横倾甚至倾覆。"},{"id":93,"type":"multi","stem":"内陆渔船在码头停泊期间进行明火作业前，应当完成的安全准备包括哪些","options":["清理作业区周围易燃物并备好灭火器材","检查确认舱内无可燃气体并通风","安排专人监火并明确应急联络方式","作业结束后立即离开不必复查","将燃油舱注满以减少油气空间"],"answer":[0,1,2],"explanation":"知识点：渔船明火作业安全准备。清理易燃物备灭火器、检测可燃气体并通风、设专人监火和应急联络，都是必要准备，故A、B、C正确。D作业后不复查可能留下阴燃火种，是错误做法；E注满燃油舱与明火作业安全无直接关系，且作业中补油反而增加火灾风险。"},{"id":94,"type":"single","stem":"在内河航道中驾驶渔船通过弯曲河段时，为减小船舶偏移和便于控制船位，应尽量将船位保持在","options":["航道主流中心线偏外侧","航道主流中心线偏内侧","靠近凸岸的缓流区","靠近凹岸的深水区"],"answer":[2],"explanation":"知识点是弯道水流与船位选择。弯道凸岸一侧流速较缓，渔船在此航行可减小水流对船位的推压，便于操控；主流中心线偏外侧流速大，会加剧船舶外移；主流中心线偏内侧仍受较强主流影响；凹岸深水区流速大且易产生扫弯水，不利渔船稳定。"},{"id":95,"type":"single","stem":"内陆渔船在狭窄河段与来船对遇，双方均已发现对方时，正确的避让行动是","options":["各自向右转舵，从左舷会船","各自向左转舵，从右舷会船","加速抢先通过狭窄段","减速后靠右岸停车等待"],"answer":[0],"explanation":"知识点是对遇避让规则。狭水道对遇应各自向右转舵，使两船从左舷通过，这是内河普遍遵循的避让原则；向左转舵会造成对撞风险；加速抢先通过会压缩避让时间；靠右岸停车等待属于单方消极处置，不能替代规则要求的主动避让。"},{"id":96,"type":"single","stem":"渔船在湖泊遇雷暴天气，雷达天线和桅杆较高，此时船员在舱面最应采取的措施是","options":["站在桅杆旁观察风向变化","进入船舱并关闭门窗","到船头收起渔网","在舱面继续整理网具"],"answer":[1],"explanation":"知识点是雷暴天气人员防护。金属桅杆、天线易遭雷击，人员应进入船舱并关闭门窗，避免在舱面暴露；站在桅杆旁增加雷击风险；船头收网仍处于露天高处；舱面整理网具同样无法避免直接雷击。"},{"id":97,"type":"single","stem":"内陆渔船主机运转时发现排气管冒白烟且机温偏高，首先应检查的项目是","options":["燃油箱油位是否过低","海水泵是否正常供水","蓄电池电压是否充足","齿轮箱油位是否偏高"],"answer":[1],"explanation":"知识点是柴油机排烟异常与冷却系统判断。白烟伴随机温偏高常见于冷却水不足或海水泵供水异常，应先查冷却水循环；燃油箱油位过低多表现为功率下降或熄火；蓄电池电压影响起动而非排烟；齿轮箱油位与主机排烟无直接关系。"},{"id":98,"type":"single","stem":"渔船在港内靠泊时，为控制船身与码头的角度并防止船首外偏，通常应","options":["先带船首缆再带船尾缆","先带船尾缆再带船首缆","同时带首尾缆并立即停车","只带船首缆不带走缆"],"answer":[0],"explanation":"知识点是靠泊带缆顺序。先带船首缆可利用车舵配合控制船首，防止船首外偏，再带船尾缆逐步贴靠；先带船尾缆易使船首甩出；同时带缆并立即停车会失去控制角度；只带船首缆无法固定船尾。"},{"id":99,"type":"single","stem":"在内河渔船航行中，发现前方水面有连续翻花并伴有横向波纹，最可能是","options":["浅水区的正常水面","水下有暗礁或障碍物","鱼群活动形成的水花","航道中心的主流"],"answer":[1],"explanation":"知识点是水纹识别与碍航物判断。连续翻花并伴横向波纹常是水流遇水下障碍物后形成的紊流，提示暗礁或沉物；浅水区正常水面一般无持续翻花；鱼群水花多为散乱跳跃；航道主流通常表现为较规则的流线。"},{"id":100,"type":"single","stem":"内陆渔船在夜间航行时，看到前方来船显示红、绿两舷灯和桅灯，但未见尾灯，说明该船","options":["正在驶离本船","正对本船驶来","已抛锚停泊","正在横向穿越"],"answer":[1],"explanation":"知识点是号灯识别。同时看到红绿舷灯和桅灯，说明来船船首朝向本船，即正面对遇；驶离时通常看到尾灯；抛锚船显示锚灯；横向穿越时一般只见一舷灯和桅灯。"},{"id":101,"type":"single","stem":"渔船在河道中发生搁浅后，检查发现船体未破损、主机仍可运转，首先应做的处置是","options":["立即全速倒车退出","测量周围水深并确定脱浅方向","打开海底阀注水增加吃水","人员全部集中到船首"],"answer":[1],"explanation":"知识点是搁浅应急处置。搁浅后应先测水深、探明底质和搁浅部位，再确定脱浅方向；盲目全速倒车可能损坏桨舵或加深搁浅；注水会增加吃水更不利脱浅；人员集中船首会改变纵倾，可能加剧船体受损。"},{"id":102,"type":"single","stem":"内陆渔船轮机员在起动柴油机前，发现油水分离器中有较多积水，正确处理是","options":["直接起动，运转后自动排出","先放净积水再起动","提高燃油温度使水蒸发","加大油门冲走积水"],"answer":[1],"explanation":"知识点是燃油系统起动前检查。油水分离器积水会进入高压油泵和喷油器，应先放净积水再起动；直接起动可能造成供油中断或机件损坏；提高油温不能除去已分离的水；加大油门会把积水带入燃烧室。"},{"id":103,"type":"single","stem":"内陆渔船在收网时发现网具挂住水下障碍物，主机负荷突然增大，正确处置是","options":["立即加大油门强行拖出","停车并缓慢松出网具","快速反转绞网机","继续收网并保持航向"],"answer":[1],"explanation":"知识点是网具挂底处置。应立即停车、缓慢松出网具，防止绞网机、纲索或船体受损，再设法解脱；加大油门会拉断网具或损坏设备；快速反转绞网机易造成机械损坏或人员伤害；继续收网会加剧挂阻。"},{"id":104,"type":"single","stem":"在内河航道驾驶渔船航行时，发现前方有横越船正在抢越船头，此时应采取的避让行动是","options":["保持航向和航速，鸣笛警告对方","减速并向右转向，从横越船船尾通过","加速抢在横越船前方通过","停车等待横越船驶过后再续航"],"answer":[1],"explanation":"知识点：内河避碰规则中横越船与直航船的避让关系。横越船应让直航船，但直航船发现对方抢越时应减速、向右转向从船尾通过，这是避碰规则要求的协调避让动作。保持航速鸣笛只会加剧碰撞危险；加速抢越更是错误操作；停车等待虽然保守但不符合作业实际且可能造成紧迫局面。"},{"id":105,"type":"single","stem":"渔船柴油机运转中机油压力突然下降至低位，同时伴有异常敲缸声，正确的下一步处置是","options":["继续低速运转观察压力是否回升","立即加大油门检查是否是负荷问题","立即停车检查机油量和油路","先关闭冷却水再停车检查"],"answer":[2],"explanation":"知识点：柴油机机油压力骤降伴异响属于严重故障征兆，应立即停车。机油压力过低会导致轴瓦烧损，敲缸声说明润滑已恶化，继续运转或加大油门都会扩大损坏。先关冷却水再停车顺序错误，会因机体过热造成缸盖开裂。"},{"id":106,"type":"single","stem":"内河渔船在能见度不良的雾天航行时，按规定应使用的声号是","options":["每隔不超过2分钟鸣放一长声","每隔不超过2分钟鸣放两长声","每隔不超过1分钟鸣放一长两短声","每隔不超过1分钟鸣放一长声"],"answer":[3],"explanation":"知识点：内河能见度不良时的雾号规定。渔船在航时应每隔不超过1分钟鸣放一长声。2分钟间隔过长；两长声是失去控制的船舶信号；一长两短声是操纵能力受限船舶信号，均不适用于正常在航渔船。"},{"id":107,"type":"single","stem":"内陆渔船在江河中顺流下网作业时，船舶应保持的姿态和操作是","options":["船首迎流、主机低速前进控制船位","船首顺流、主机停车随流漂移下网","船首横流、利用水流横向展开网具","船首迎流、主机停车由水流推船后退"],"answer":[0],"explanation":"知识点：顺流下网时渔船应以船首迎流、低速进车控制船位，保持对船舶的有效操控。船首顺流停车漂移会失去舵效和操控；船首横流极易被水流压翻或网具缠绕螺旋桨；停车由水流推船后退则完全丧失控制能力。"},{"id":108,"type":"single","stem":"渔船在浅水区航行时发现船体振动加剧、航速明显下降、舵效变差，最可能的原因是","options":["螺旋桨吸入空气产生空泡","船底搁浅或擦碰河床","主机转速过高导致共振","舵机液压系统漏油"],"answer":[1],"explanation":"知识点：浅水效应及搁浅征兆判断。浅水区船体下沉、振动加剧、航速下降、舵效变差是典型搁浅或擦底表现。空泡多发生在高转速浅水但不会持续舵效变差；主机共振主要表现为特定转速下振动；舵机漏油只影响操舵不会导致航速下降。"},{"id":109,"type":"single","stem":"渔船在狭窄河段与来船对遇，双方均应采取的行动是","options":["各自向右转向，从左舷会船","各自向左转向，从右舷会船","双方均减速并保持原航向","双方均加速尽快通过"],"answer":[0],"explanation":"知识点：内河对遇局面的避让规则。对遇时应各自向右转向，从左舷（即对方左舷）会船通过。向左转向会形成交叉碰撞危险；保持原航向不能消除对遇冲突；加速通过会缩短反应时间，均不符合避碰要求。"},{"id":110,"type":"single","stem":"渔船在湖泊作业时突遇雷暴大风，最优先的处置措施是","options":["立即收网并全速返港","就地抛锚并所有人员进舱","关闭主机让船随风漂流","迎风慢速航行等待风浪减弱"],"answer":[0],"explanation":"知识点：突遇雷暴大风的应急原则。应尽快收网、全速返港或就近避风，避免在开阔水域停留。就地抛锚在风暴中容易走锚且船体受浪冲击大；关主机漂流会失去控制；迎风慢速航行在强风中难以维持且延误避险时机。"},{"id":111,"type":"single","stem":"渔船在内河航行时发现有人落水，船舶应首先采取的行动是","options":["立即停车并向落水者一侧转舵","立即加速绕圈返回救人","立即抛锚固定船位后施救","立即鸣笛通知周围船舶"],"answer":[0],"explanation":"知识点：人员落水应急操纵程序。发现落水应立即停车并向落水者一侧转舵，利用船舶回转使船尾避开落水者后接近施救。加速绕圈会扩大搜索范围且螺旋桨可能伤人；抛锚固定船位不能主动接近落水者；鸣笛通知是辅助动作而非首要处置。"},{"id":112,"type":"single","stem":"渔船柴油机启动后机油压力表无读数，但机器能正常运转，最可能的原因是","options":["机油泵损坏导致无压力","机油压力表或传感器故障","机油粘度过高导致读数延迟","机油滤清器堵塞导致旁通"],"answer":[1],"explanation":"知识点：机油压力表无读数但机器运转正常的故障判断。机器能正常运转说明润滑系统实际在工作，最可能是压力表或传感器故障。机油泵损坏机器很快会损坏；粘度过高会有读数只是偏高；滤清器堵塞旁通阀打开后压力仍会有一定读数。"},{"id":113,"type":"single","stem":"在内河湖泊驾驶渔船航行时，发现前方水面有连续成片的杂草漂移，正确做法是","options":["减速鸣号并绕行避开草区","加速冲过草区防止缠桨","保持航向从草区正中通过","停车等草区漂走后原路通过"],"answer":[0],"explanation":"知识点：内陆水域航行障碍物处置。前方有连续成片漂移杂草时可能缠住螺旋桨或堵塞冷却水进口，应减速鸣号并绕行避开；加速冲过会加大缠桨风险，从草区正中通过正撞障碍，停车等待草区整体漂走往往不现实且易失控。"},{"id":114,"type":"single","stem":"内陆渔船柴油机运转中冷却水出水管突然断流，水温表迅速上升，首先应做的操作是","options":["立即减速并停车检查冷却系统","继续运转观察水温是否回落","加大油门让水泵转速提高","向机体外部泼水降温后继续运转"],"answer":[0],"explanation":"知识点：柴油机冷却水断流的应急处理。冷却水断流会使机体过热，应立即减速停车检查，防止拉缸或抱瓦；继续运转会加剧损坏，加大油门会加重过热，外部泼水不能恢复内部冷却且可能使机体骤冷开裂。"},{"id":115,"type":"single","stem":"渔船在狭窄河道掉头时，为减小船尾向对岸甩出的幅度，较合适的操纵方法是","options":["先减速再分次小角度转舵掉头","保持高速一次满舵完成掉头","先加速再满舵快速掉头","停车后仅靠水流自然转头"],"answer":[0],"explanation":"知识点：狭窄水域掉头操纵。先减速可减小回转惯性，分次小角度转舵能控制船尾甩出幅度，避免触碰岸边；高速满舵会使船尾大幅外甩，停车仅靠水流难以控制方向。"},{"id":116,"type":"single","stem":"内陆渔船在夜间锚泊时，用于显示锚泊状态的号灯应是","options":["白色环照灯一盏","红色环照灯一盏","绿白两色闪光灯一盏","红绿两色舷灯各一盏"],"answer":[0],"explanation":"知识点：内河渔船锚泊号灯。锚泊船应显示白色环照灯一盏，便于他船判断其位置和状态；红色环照灯、绿白闪光灯、红绿舷灯均不符合锚泊号灯要求。"},{"id":117,"type":"single","stem":"渔船柴油机启动后机油压力表指针长时间停在零位附近，正确的处置是","options":["立即停车检查润滑系统","低速运转等待油压上升","提高转速促使油泵供油","继续运转并观察油温变化"],"answer":[0],"explanation":"知识点：柴油机润滑系统异常判断。机油压力长时间近零说明润滑系统可能失效，应立即停车检查，防止烧瓦；低速等待、提高转速、继续运转都可能造成严重机械损坏。"},{"id":118,"type":"single","stem":"在湖泊渔船作业中，船员不慎落水且船舶仍在前进，最先应采取的处置是","options":["向落水者一侧转舵并抛投救生圈","立即倒车使船后退寻找落水者","加速前进绕圈返回落水点","停车后原地等待落水者游来"],"answer":[0],"explanation":"知识点：人员落水应急操纵。应向落水者一侧转舵并抛投救生圈，使船尾远离落水者并尽快返回；立即倒车可能使落水者卷入螺旋桨，加速绕圈延误救援，原地等待会扩大漂移距离。"},{"id":119,"type":"single","stem":"内陆渔船在汛期通过桥孔时，水流湍急且桥孔净宽有限，正确做法是","options":["减速对准桥孔中心缓速通过","加速抢在横流前冲过桥孔","靠近桥墩一侧借回流通过","停车随水流漂过桥孔"],"answer":[0],"explanation":"知识点：汛期桥孔通过操作。应减速对准桥孔中心缓速通过，便于随时修正航向；加速抢行易失控撞墩，靠近桥墩会受回流吸力影响，停车漂流无法控制方向。"},{"id":120,"type":"single","stem":"渔船在雾天能见度不良水域航行时，为判断周围有无来船，主要应依靠","options":["鸣放声号并派人船首瞭望","打开所有灯光提高能见度","加速航行尽快驶出雾区","关闭机器静默倾听周围动静"],"answer":[0],"explanation":"知识点：雾航安全操作。雾天应鸣放声号并派人在船首瞭望，利用听觉和视觉及时发现来船；打开所有灯光会造成眩光影响瞭望，加速航行增加碰撞风险，关闭机器会失去操纵能力。"},{"id":121,"type":"single","stem":"内陆渔船在浅水区航行时，舵效明显变差且船体有下沉感，较可能的原因是","options":["浅水效应使船底水流受阻","螺旋桨打到水草失去推力","舵机液压油温过低","船首装载过多造成埋首"],"answer":[0],"explanation":"知识点：浅水效应。浅水区船底与河床间隙小，水流受阻使船体下沉、舵效变差；螺旋桨缠草会伴随转速异常，液压油温低影响舵机响应但不致船体下沉，首部装载过多主要造成埋首而非整体下沉。"},{"id":122,"type":"single","stem":"渔船在江河中顺流下驶需要减速时，较合理的操作是","options":["先减小油门再适时倒车制动","直接挂倒车全速倒车","关闭发动机让船随流漂下","满舵使船横向受流减速"],"answer":[0],"explanation":"知识点：顺流减速操作。顺流船惯性大，应先减小油门再适时倒车制动，逐步降低速度；直接全速倒车易损坏传动装置，关闭发动机失去操纵能力，满舵横船易被水流压倾。"},{"id":123,"type":"single","stem":"内陆渔船在码头靠泊时，若风从船尾方向吹来且水流平缓，较稳妥的靠泊方法是","options":["顶风靠泊并控制好靠泊角度","顺风加速贴靠码头","横风满舵快速贴靠码头","船尾先靠再带缆固定船首"],"answer":[0],"explanation":"知识点：靠泊操纵。尾风时顶风靠泊可借助风力控制船速和角度，便于平稳贴靠；顺风加速贴靠易撞码头，横风满舵难以控制，船尾先靠易使船身横压码头。"},{"id":124,"type":"multi","stem":"内陆渔船在航行中发现机舱有焦糊味且伴有少量烟雾，下列处置措施中恰当的有","options":["立即减速并查明气味来源","切断相关设备电源或油路","打开机舱通风但避免大量空气涌入","继续航行到目的港后再检查","用水直接冲浇可能带电的电气设备"],"answer":[0,1,2],"explanation":"知识点：机舱火灾隐患应急处置。发现焦糊味和烟雾应立即减速查明来源，切断相关电源或油路，打开通风但避免大量空气助燃；继续航行会延误处置，用水冲浇带电设备可能触电或扩大损坏。"},{"id":125,"type":"single","stem":"内陆渔船在狭窄河段顺流下行时，为便于随时调整航向并防止搁浅，驾驶操作应保持的状态是","options":["保持主机中速以上以增大舵效","保持主机低速并随时可倒车","将舵角固定于一侧持续偏转","关闭主机利用水流控制方向"],"answer":[1],"explanation":"知识点：狭窄河段顺流下行的主机与舵的配合。顺流下行时水流本身已给船速，若主机中速以上会叠加流速使反应距离过长，低速并保持随时倒车能力才能在浅滩或来船时及时减速停船，故B正确。A错在高速叠加流速反而缩短了可用于判断和操作的时间距离；C错在固定舵角会使船持续偏转撞岸；D错在关闭主机失去动力就失去倒车和主动控向能力，只能随流漂移。"},{"id":126,"type":"single","stem":"内陆渔船夜间在湖面锚泊时，按避碰要求应显示的号灯是","options":["白光环照灯一盏","红绿舷灯各一盏","红白绿三色灯一组","白光环照灯两盏"],"answer":[0],"explanation":"知识点：锚泊船号灯显示。锚泊船不航行、不显示舷灯和桅灯，只显示一盏白光环照灯以示锚泊，故A正确。B错在红绿舷灯是航行船表示左右舷来向的号灯；C错在三色灯是帆船或特定小艇航行时用的号灯组合；D错在两盏白光环照灯不是锚泊船规定的显示方式。"},{"id":127,"type":"single","stem":"柴油机运转中机油压力突然下降并伴随异常敲缸声，正确的第一步处置是","options":["加大油门提高转速维持压力","立即停车检查润滑系统","继续观察待压力自行恢复","打开加水口补充冷却水"],"answer":[1],"explanation":"知识点：柴油机润滑系统故障判断。机油压力骤降加敲缸声说明润滑失效、轴瓦可能干摩擦，继续运转会烧瓦抱轴，应立即停车，故B正确。A错在加大油门只会加剧磨损；C错在敲缸声已说明故障在发展，等待会扩大损失；D错在冷却水与机油压力无关，加水不能解决润滑失效。"},{"id":128,"type":"single","stem":"渔船在河道中发现有人落水且本船为单螺旋桨，接近落水者时应采取的方式是","options":["从落水者上风侧全速靠近","从落水者下风侧低速靠近","从落水者正前方直接冲靠","绕落水者转圈后再靠近"],"answer":[1],"explanation":"知识点：单螺旋桨船救助落水者的操纵。应从下风侧低速接近，使船身挡风浪并把螺旋桨远离落水者，防止桨叶伤人，故B正确。A错在上风侧靠近会使船被风压向落水者且难以控制距离；C错在正前方冲靠极易撞击落水者；D错在绕圈既延误时间又可能把落水者卷入尾流。"},{"id":129,"type":"single","stem":"内陆渔船在浅水区航行时，舵效明显变差且船首易偏转，主要原因是","options":["浅水使舵叶有效面积增大","浅水使船底水流受阻舵效降低","浅水使主机转速自动升高","浅水使舵机液压油变稠"],"answer":[1],"explanation":"知识点：浅水效应对操纵性的影响。浅水区船底与河床间隙小，水流受阻、舵叶处流速降低，舵效下降且船首易偏，故B正确。A错在舵叶面积是固定结构不因水深改变；C错在主机转速由调速器控制，与水深无直接自动升高关系；D错在液压油黏度受温度影响，与浅水无直接关系。"},{"id":130,"type":"single","stem":"渔船在港内加油时，为防止油料溢出污染水域，加油过程中应重点监控的部位是","options":["主机转速表变化","油舱透气管和液位","舵机液压油位","舱底水泵开关"],"answer":[1],"explanation":"知识点：加油作业防溢油监控。加油时油舱液位上升，透气管是溢油最先出现的位置，监控透气管和液位能及时发现满舱，故B正确。A错在主机转速与加油无直接关系；C错在舵机液压油位是另一系统，加油时无需监控；D错在舱底水泵开关与加油防溢无关。"},{"id":131,"type":"single","stem":"渔船在雾中航行时，听到他船雾号来自右前方且距离较近，正确的做法是","options":["立即加速抢在他船前通过","减速并把船停住直至确认安全","保持原速原向继续航行","向左转向横穿他船船首"],"answer":[1],"explanation":"知识点：雾航避碰。雾中能见度差，听到近距雾号说明他船就在附近，应减速并把船停住，判明情况后再动，故B正确。A错在加速穿越风险极大；C错在保持原状等于把安全交给运气；D错在向左转向横穿他船船首是避碰大忌。"},{"id":132,"type":"single","stem":"渔船在江河中逆流上行通过桥孔时，选择桥孔和航速的正确做法是","options":["选通航孔并保持较高航速","选任意桥孔并低速通过","选通航孔并低速稳舵通过","选中间桥孔并停车漂流"],"answer":[2],"explanation":"知识点：桥区航行。应走规定的通航孔，逆流时低速稳舵以便随时调整，故C正确。A错在较高航速在桥孔附近难以修正偏差；B错在任意桥孔可能撞桥墩；D错在中间桥孔不一定是通航孔，停车漂流更失去控制。"},{"id":133,"type":"single","stem":"渔船在作业中有人被缆绳绞伤手臂且出血较多，现场急救的正确顺序是","options":["先冲洗伤口再按压止血","先止血包扎再送医","先喂水休息再观察","先热敷伤处再固定"],"answer":[1],"explanation":"知识点：外伤出血现场急救。大出血应先止血包扎，防止失血性休克，再尽快送医，故B正确。A错在先冲洗会延误止血；C错在喂水观察会耽误抢救；D错在热敷会加重出血且不解决止血问题。"},{"id":134,"type":"single","stem":"渔船在湖泊遭遇突发大风，船身剧烈横摇，此时最不宜采取的措施是","options":["降低重心并调整压载","转向顶风以减小横摇","加速横穿风浪区","必要时择地锚泊"],"answer":[2],"explanation":"知识点：大风浪中渔船操纵。横摇剧烈时应降重心、转向顶风或择地锚泊，故A、B、D都是可行措施；C错在加速横穿风浪区会使船身继续受横浪冲击，加剧横摇甚至倾覆，是最不宜做的。"},{"id":135,"type":"multi","stem":"内陆渔船在河道航行中发生搁浅且船体未破损，下列处置措施中恰当的有","options":["立即停车并测量四周水深","盲目加大油门倒车脱浅","记录搁浅位置并显示求救信号","趁退水前用缆绳固定船位","全员集中到船首压住船头"],"answer":[0,2,3],"explanation":"知识点：搁浅应急处置。停车测水深可判明处境，记录位置并显示信号便于求援，固定船位可防止退水后进一步倾斜，故A、C、D正确。B错在盲目加大油门倒车可能使螺旋桨缠住河床杂物或损坏桨叶；E错在人员集中船首会加剧纵倾，甚至使船首进一步插入泥底。"},{"id":136,"type":"single","stem":"内陆渔船在湖泊中遇到突然出现的横风，船首偏向下风，此时正确的操舵处置是","options":["向上风侧压舵，同时适当加速","向下风侧压舵，同时减速","保持舵角为零，等船自然回正","向上风侧压舵并立即停车"],"answer":[0],"explanation":"知识点：横风中的操舵与用车配合。船首偏向下风时，向上风侧压舵可产生迎风力矩把船首拉回，适当加速能增强舵效加快回转。向下风侧压舵会加剧偏转；零舵角放任不管船会持续偏航；立即停车会使舵效丧失，船更难控制。"},{"id":137,"type":"single","stem":"内陆渔船在浅水区航行时，船体出现明显下沉、航速下降且舵效变差，这种现象通常称为","options":["浅水效应","兴波阻力","螺旋桨空泡","船舶纵倾"],"answer":[0],"explanation":"知识点：浅水效应。浅水区船底与河床间隙小，回流加剧导致船体下沉、阻力增大、舵效变差，这就是浅水效应。兴波阻力是航速引起的波浪阻力，不是下沉现象；空泡是螺旋桨叶片上气泡溃灭造成剥蚀和推力下降；纵倾是船体首尾吃水差，与浅水下沉不是同一概念。"},{"id":138,"type":"single","stem":"内陆渔船柴油机运转中机油压力表读数突然降到很低，同时机油报警灯亮，首先应当采取的措施是","options":["继续低速运转观察压力是否回升","立即停车检查机油油位和油路","加大油门提高转速以提升油压","关闭报警灯后维持原工况"],"answer":[1],"explanation":"知识点：机油压力过低的应急处置。机油压力骤降说明润滑系统可能缺油、油泵故障或油路泄漏，继续运转会烧瓦抱轴，应立即停车检查油位和油路。继续低速观察会延误时机造成机械损坏；加大油门会加剧磨损；关闭报警灯掩盖故障属于错误做法。"},{"id":139,"type":"single","stem":"内陆渔船在江河中抛锚时，锚链抛出长度与水深的关系，一般应放出水深的","options":["1至2倍","3至5倍","6至8倍","10倍以上"],"answer":[1],"explanation":"知识点：抛锚出链长度。江河湖泊抛锚一般按水深的3至5倍放出锚链，使锚链形成足够卧底长度产生抓力。1至2倍太短，锚链接近垂直，锚爪难以抓底；6至8倍和10倍以上出链过长，船会回旋范围过大，在狭窄河道易搁浅或与其他船碰撞。"},{"id":140,"type":"single","stem":"内陆渔船在夜间航行时，看到前方来船显示红色舷灯和白色桅灯，未见绿色舷灯，说明该船","options":["正从本船右舷方向驶来","正从本船左舷方向驶来","与本船同向行驶","处于锚泊状态"],"answer":[0],"explanation":"知识点：舷灯与相对方位判断。看到红灯说明看到的是来船左舷，来船左舷对着本船即来船从本船右舷方向驶来。看到绿灯才是来船右舷对着本船；同向行驶通常看到的是白色尾灯；锚泊船夜间显示锚灯，不显示红绿舷灯。"},{"id":141,"type":"single","stem":"内陆渔船在湖泊中作业时突遇雷暴大风，最优先的处置是","options":["加速驶向最近的岸边避风","就地抛锚并让船员到舱内等待","继续作业待风力减弱再返航","掉头迎风航行以减小横倾"],"answer":[0],"explanation":"知识点：雷暴大风的应急避险。突遇雷暴大风应尽快驶向最近可避风的岸边或港湾，缩短在开阔水域的暴露时间。就地抛锚在开阔湖面仍会受风浪冲击，且可能走锚；继续作业会加大危险；迎风航行在雷暴阵风中难以保持，且不能替代避风。"},{"id":142,"type":"single","stem":"内陆渔船轮机员在起动柴油机前，手压输油泵发现出油不畅且有气泡，说明","options":["燃油系统进入空气，需要放气","喷油器雾化不良，需要更换","机油粘度过高，需要预热","冷却水温过低，需要加温"],"answer":[0],"explanation":"知识点：燃油系统进气判断。手压输油泵出油不畅并带气泡，是燃油系统进气的典型表现，应打开放气螺钉排净空气。喷油器雾化不良表现为排烟异常和功率下降，与输油泵出油气泡无关；机油粘度和冷却水温问题分别影响润滑和冷却，不会造成输油泵出油带气泡。"},{"id":143,"type":"single","stem":"内陆渔船在河道中与对遇船相遇，双方均应采取的措施是","options":["各自向右转向，从左舷会船","各自向左转向，从右舷会船","各自保持航向和航速直行","由下游船先行，上游船让路"],"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，使两船从左舷通过，形成一致的避让动作。各自向左转向会使避让方向相反，容易造成紧迫局面；保持航向直行不采取避让违反规则；以内河上下游划分让路义务不是对遇局面的处理原则。"},{"id":144,"type":"single","stem":"内陆渔船在停泊期间，船员发现舱底积水持续增多，抽干后不久又积满，最可能的原因是","options":["船体或管路有渗漏点","舱底水泵功率偏小","江水温度偏低凝结成水","船体油漆脱落吸水"],"answer":[0],"explanation":"知识点：舱底异常积水的故障判断。抽干后很快又积满，说明有持续水源进入，最常见是船体焊缝、铆钉或管路存在渗漏点。水泵功率偏小只影响抽水速度，不会造成水不断增多；水温低凝结水量有限且不会持续积满；油漆脱落吸水不会形成大量舱底积水。"},{"id":145,"type":"single","stem":"内陆渔船在靠泊码头时，为防止船体与码头碰撞，船员应在船与码头之间","options":["垫上碰垫并带好首尾缆","用撑篙顶住码头缓慢靠拢","派人站在舷边用手推挡","抛出锚链绕在码头桩上"],"answer":[0],"explanation":"知识点：靠泊防撞操作。正确做法是在船与码头之间放置碰垫缓冲，并带好首尾缆固定船位。用撑篙顶码头在船有惯性时撑不住，竹篙易折断伤人；用手推挡极易夹伤手指；把锚链绕在码头桩上不是靠泊固定方式，且锚链无缓冲作用。"},{"id":146,"type":"multi","stem":"内陆渔船在湖泊航行中主机突然熄火，此时应当采取的措施有","options":["立即显示失控信号并通知周围船舶","利用余速和舵控制船首方向避开障碍","迅速抛锚稳住船位防止漂移","马上拆卸主机查找故障原因","让船员集中到船的一侧查看情况"],"answer":[0,1,2],"explanation":"知识点：主机失控的应急处置。熄火后应先显示失控信号提醒周围船舶，利用余速和舵避开障碍，必要时抛锚稳住船位，这三项都是正确处置。马上拆卸主机查找故障会占用时间且船仍在漂移，应先保证安全再检修；让船员集中到一侧会使船体倾斜，增加倾覆风险。"},{"id":147,"type":"single","stem":"内陆渔船在狭窄河道顺流下行时，为便于控制船位，驾驶员通常应把船保持在主流的哪一位置？","options":["主流中央略偏右，便于随时向左调整","主流中央，以最大流速通过","主流两侧的缓流带，靠近凹岸一侧","主流与缓流交界处，靠凸岸一侧"],"answer":[2],"explanation":"知识点：顺流下行船位选择。顺流船速快、舵效相对减弱，应利用缓流带降低对地速度、争取反应时间，靠凹岸一侧缓流带水深较稳定且便于控制。A项偏右只是主观偏好，未说明缓流利用；B项主流中央流速最大，反使船速过快、避让余地小；D项凸岸一侧常有浅滩，交界处泡水多，不宜作为常规船位。"},{"id":148,"type":"single","stem":"内陆渔船柴油机运转中机油压力表突然从正常值降到接近零，且伴有异常敲击声，首先应做的操作是？","options":["加大油门观察压力是否能恢复","立即停车检查润滑系统","先降低转速再打开机油加注口查看","继续低速运转并派人监视压力表"],"answer":[1],"explanation":"知识点：柴油机润滑系统故障应急。机油压力骤降并伴敲击声，说明润滑可能已失效，继续运转会烧瓦抱轴，应立即停车。A项加大油门会加剧磨损；C项降速虽能减轻负荷，但敲击声已表明危险，且打开加注口不能判断故障；D项监视压力表属于延误处置。"},{"id":149,"type":"single","stem":"在内河湖泊使用汽油挂机的小型渔船，起动前应把油箱开关置于什么状态并检查什么？","options":["置于关闭状态，检查油管有无裂纹","置于打开状态，检查化油器有无渗漏","置于打开状态，检查火花塞间隙是否合适","置于关闭状态，检查蓄电池电量是否充足"],"answer":[1],"explanation":"知识点：汽油挂机起动前检查。起动前应打开油箱开关供油，并检查化油器、油管接头有无渗漏，防止汽油泄漏引发火灾。A项关闭开关无法供油；C项火花塞间隙不是每次起动前必查项，且漏检渗漏更危险；D项关闭开关与起动供油要求不符，小型挂机多为手起动，蓄电池并非重点。"},{"id":150,"type":"single","stem":"渔船在湖泊遭遇突风，船身开始横倾且甲板货物出现移位，此时最优先的处置是？","options":["立即加速顶风航行以稳定船身","迅速将货物移至背风一侧压舱","减速并调整航向使船首迎风","全员集中到上风舷增加压载"],"answer":[2],"explanation":"知识点：突风横倾应急。船身横倾且货物移位时，应立即减速并调整航向使船首迎风，减小横风面积和横倾力矩。A项加速会加大风压和横倾；B项货物已移位，盲目搬动可能加剧倾覆；D项人员集中到上风舷会抬高重心并增加横倾风险。"},{"id":151,"type":"single","stem":"内陆渔船在夜间航行时，看到前方来船显示一盏白光灯，且该灯在靠近过程中逐渐由白变红，说明来船可能正在？","options":["向右转向，从本船左舷通过","向左转向，从本船右舷通过","保持航向，与本船对遇","正在抛锚，准备停船"],"answer":[0],"explanation":"知识点：内河避碰灯光信号。夜间看到来船白光灯逐渐变红，通常是来船向右转向时其左舷红灯进入本船视野，表明其从本船左舷通过。B项向左转向应显示绿光；C项对遇应同时看到红绿两舷灯；D项锚泊船显示锚灯，不会由白变红。"},{"id":152,"type":"single","stem":"渔船轮机员发现柴油机排气管冒黑烟，且排气温度偏高，最可能的原因是？","options":["喷油量过少，燃烧不完全","进气不足，燃油与空气比例失调","机油进入燃烧室参与燃烧","冷却水温过低，燃烧滞后"],"answer":[1],"explanation":"知识点：柴油机排气烟色判断。冒黑烟且排温高，典型原因是进气不足或喷油过多导致燃油与空气比例失调、燃烧不完全。A项喷油量过少一般冒白烟或动力不足；C项机油进入燃烧室多冒蓝烟；D项冷却水温过低主要影响燃烧滞后和冒白烟，不是黑烟主因。"},{"id":153,"type":"single","stem":"在内河渔船靠泊过程中，若水流从船尾方向推来，驾驶员应如何操纵以利于靠泊？","options":["船首对准泊位，慢车顶流接近","船尾对准泊位，利用水流自然靠拢","横流接近，用舵控制船身平行靠泊","先抛尾锚，再用车舵调整船首靠泊"],"answer":[1],"explanation":"知识点：尾流靠泊操纵。水流从船尾推来时，船尾对准泊位可利用水流使船身自然向泊位靠拢，便于控制。A项船首对准泊位会因尾流推压使船首难以控制；C项横流接近易使船身横压码头；D项先抛尾锚在尾流中易使船尾甩向码头造成碰撞。"},{"id":154,"type":"single","stem":"渔船在江河中航行时，发现前方水面出现连续、密集的“鱼鳞状”波纹且颜色发暗，通常表明该处？","options":["水深较深，适合通过","有暗礁或浅滩，应减速绕行","水流平缓，可加速通过","有渔网布置，应保持航向"],"answer":[1],"explanation":"知识点：内河水面波纹识读。连续密集的鱼鳞状波纹且颜色发暗，多为水流遇水下障碍物或浅滩后形成的紊流，提示有暗礁或浅滩。A项深水区水面通常较平缓；C项水流平缓不会形成密集紊流；D项渔网标志多为浮标或竹竿，不是这种波纹形态。"},{"id":155,"type":"single","stem":"内河渔船在能见度不良的雾中航行时，按规定应采取的航速和信号措施是？","options":["保持原速，开启航行灯并鸣笛","减速至能随时停船，并按规定鸣放雾号","加速驶出雾区，同时开启探照灯","停车漂航，仅开启桅灯等待雾散"],"answer":[1],"explanation":"知识点：雾航规则。能见度不良时应减速至能随时停船，并按规定鸣放雾号，必要时择地锚泊。A项保持原速违反雾航安全要求；C项加速驶出雾区风险更大；D项停车漂航在航道中可能碍航，且仅开桅灯不足以警示他船。"},{"id":156,"type":"single","stem":"渔船在码头加油时，输油管接头处出现轻微渗漏，现场人员正确的处置是？","options":["用抹布缠紧接头后继续加油","立即停止加油，清除渗漏油并检修接头","降低加油速度，让油滴落入江中","继续加油，同时用水冲洗接头处"],"answer":[1],"explanation":"知识点：渔船加油作业安全。发现渗漏应立即停止加油，清除渗漏油并检修接头，防止火灾和水体污染。A项缠抹布继续加油不能消除渗漏且易起火；C项让油滴入江中造成污染；D项用水冲接头不能阻止渗漏，还会扩大污染。"},{"id":157,"type":"single","stem":"内陆渔船在狭窄河道顺流下航时，为便于随时靠泊应采用的车舵配合方式是","options":["进车航行并把舵置于正舵位置","停车淌航并把舵置于正舵位置","慢速进车并把舵置于随水流偏转位置","中速进车并把舵置于满舵位置"],"answer":[2],"explanation":"知识点为狭窄河道顺流下航的操纵要领。正确项慢速进车可保持舵效又不过快，舵随水流偏转便于及时调整航向靠泊。进车正舵速度难控；停车淌航失去舵效；中速满舵会使船体大幅偏转难以控制。"},{"id":158,"type":"single","stem":"内陆渔船柴油机运转中机油压力表指针突然降到接近零，首先应当采取的操作是","options":["立即加大油门提高转速以建立油压","立即停车检查机油油位和管路","维持怠速运转观察压力是否回升","关闭冷却水继续运转等待压力恢复"],"answer":[1],"explanation":"知识点为柴油机润滑系统异常处置。机油压力骤降说明润滑可能失效，立即停车可避免烧瓦抱轴。加大油门会加剧磨损；维持怠速运转仍会缺油损坏；关闭冷却水与润滑无关且会过热。"},{"id":159,"type":"single","stem":"渔船在湖泊夜间航行时发现前方有他船灯光，判断是否存在碰撞危险的依据是","options":["他船灯光的颜色和方位是否稳定不变","他船灯光的亮度是否比本船强","他船灯光是否出现在本船正前方","他船灯光闪烁的频率是否变化"],"answer":[0],"explanation":"知识点为夜间避碰中方位不变的判断方法。若他船灯光颜色和方位持续不变，说明存在碰撞危险。灯光亮度与他船大小有关不能判险；仅出现在正前方范围太窄；闪烁频率不是避碰判断依据。"},{"id":160,"type":"single","stem":"内陆渔船在汛期通过桥孔时，为减小水流对船体的横向推压应选择的通过方式是","options":["对准桥孔中心以较高速度直冲通过","靠桥墩一侧低速贴边通过","选择水流较缓的桥孔居中低速通过","在桥孔上游停车随流漂过"],"answer":[2],"explanation":"知识点为汛期桥孔通过操纵。水流较缓的桥孔居中低速通过可减少横推和碰撞风险。高速直冲难以修正偏差；贴桥墩易被吸拢碰撞；上游停车随流漂过失去控制。"},{"id":161,"type":"single","stem":"内陆渔船轮机员在启动柴油机前检查发现膨胀水箱水位低于最低刻度，正确的处理是","options":["启动后利用运转升温自行补水","补充冷却液至规定刻度后再启动","先启动怠速运转再缓慢加水","加水至溢流管出水为止再启动"],"answer":[1],"explanation":"知识点为柴油机启动前冷却系统检查。应补足冷却液至规定刻度再启动，防止干烧。启动后自行补水会先期过热；怠速运转再加水仍可能过热；加至溢流出水会过量且未先检查泄漏。"},{"id":162,"type":"single","stem":"渔船在江河中锚泊时，为防止走锚应重点监测的是","options":["锚链的入水角度和船位是否变化","锚机滚筒的温度是否升高","锚链舱内积水是否增多","锚链标记漆色是否脱落"],"answer":[0],"explanation":"知识点为锚泊值班中走锚的判断。锚链入水角度变平和船位漂移是走锚主要征兆。锚机温度、锚链舱积水、标记漆色与走锚无直接关系。"},{"id":163,"type":"single","stem":"内陆渔船船员发现机舱起火且火势较小，使用手提式干粉灭火器时应对准","options":["火焰上方空间喷射","火焰根部由近及远喷射","火焰中部由远及近喷射","火源周围舱壁喷射"],"answer":[1],"explanation":"知识点为干粉灭火器使用方法。应对准火焰根部由近及远喷射才能切断燃烧。上方、中部、舱壁喷射均不能有效覆盖火源根部。"},{"id":164,"type":"single","stem":"渔船在浅水区航行时舵效变差、船体下沉，正确的应对是","options":["加速通过浅水区以缩短时间","减速并适当调整吃水差后谨慎通过","保持原速并频繁左右操舵","停车等待水位上涨后再通过"],"answer":[1],"explanation":"知识点为浅水区航行效应。减速并调整吃水差可减小下沉和舵效损失。加速会加剧下沉；频繁操舵不能改善舵效；原地停车等待并非必要且可能搁浅。"},{"id":165,"type":"single","stem":"内陆渔船船员在航行中发现有人落水，夜间且水流较急，最优先的处置是","options":["立即满舵回转并抛投救生圈","先抛投带灯浮具并保持视线跟踪","加速前进绕到落水者上游","停车等待其他船舶协助"],"answer":[1],"explanation":"知识点为人员落水应急程序。夜间急流中应先抛带灯浮具并保持视线，防止失去目标。立即满舵回转可能碰撞或压到落水者；加速绕上游耗时且危险；停车等待会延误救援。"},{"id":166,"type":"single","stem":"在内河湖泊驾驶渔船时，发现前方有横越航道的渡船正在驶离码头，此时应采取的避让行动是","options":["加速从渡船船首通过","减速并鸣笛示意渡船先行","保持航向和航速不变","向右转向从渡船船尾通过"],"answer":[1],"explanation":"知识点是内河避碰规则中横越船与直航船的义务关系。渡船驶离码头属于横越航道，正在驶离时通常应让直航渔船先行，但渔船作为直航船发现其已动时，安全做法是减速并鸣笛提醒，避免抢越。加速从船首通过增加碰撞风险；保持航向航速不变在对方未让路时过于冒险；向右转向从船尾通过可能因渡船继续前进而更危险。"},{"id":167,"type":"single","stem":"内陆渔船在狭窄河道航行时，舵机突然失灵，此时最优先的处置动作是","options":["立即停车并抛下船首锚","加大油门用舵角惯性转向","通知机舱检修舵机","用竹篙撑河底控制船位"],"answer":[0],"explanation":"知识点是舵机失灵时的应急程序。狭窄河道舵效丧失后应立即停车减小动能并抛锚制动，防止撞岸或撞船。加大油门会加剧失控风险；通知机舱检修属于后续步骤，不能先于控船；用竹篙撑底仅在极浅水域有效，狭窄河道不一定能撑到底。"},{"id":168,"type":"single","stem":"渔船在湖泊中作业时，主机冷却水排出温度突然升高并伴有蒸汽，最先应检查的部位是","options":["海水泵叶轮磨损情况","淡水泵皮带是否打滑","冷却水进口滤网是否堵塞","节温器开启温度是否偏低"],"answer":[2],"explanation":"知识点是主机冷却水温度异常的原因排查顺序。排温突升伴蒸汽多因冷却水流量不足，最先应查进口滤网堵塞。海水泵叶轮磨损是渐进故障；淡水泵皮带打滑多见于淡水系统；节温器开启温度偏低会导致温度偏低而非升高。"},{"id":169,"type":"single","stem":"内陆渔船在夜间航行时，看到左前方有一盏白色环照灯和一盏红色舷灯，判断该船正在","options":["从左向右横越本船船首","从右向左横越本船船首","与本船同向行驶","与本船对遇行驶"],"answer":[0],"explanation":"知识点是号灯识别。红色舷灯在左舷，白色环照灯通常为桅灯，两灯同时出现在左前方说明来船左舷对着本船，正在从左向右横越。若从右向左横越应看到绿灯；同向行驶应看到船尾灯；对遇应同时看到红绿两舷灯。"},{"id":170,"type":"single","stem":"渔船在江河中抛锚停泊时，锚链长度一般应不少于水深的","options":["2倍","3倍","5倍","8倍"],"answer":[2],"explanation":"知识点是锚泊出链长度经验值。内河静水或缓流中一般出链长度为水深的5倍左右，以保证锚抓底并留有余量。2至3倍偏短，遇水流易走锚；8倍过长，在狭窄河道易导致船舶回旋范围过大。"},{"id":171,"type":"single","stem":"渔船轮机员在启动柴油机前，发现曲轴箱油底壳油位低于下刻线，正确的做法是","options":["启动后低速运转观察油压","补充同牌号机油至上下刻线之间","直接加注柴油稀释机油","启动后立即高速运转建立油压"],"answer":[1],"explanation":"知识点是柴油机启动前润滑系统检查。油位低于下刻线应补充同牌号机油至规定范围，避免干摩擦。启动后观察或高速运转会加剧磨损；加柴油稀释机油会破坏润滑性能。"},{"id":172,"type":"single","stem":"内陆渔船在雾中航行时，听到本船右前方传来他船一长声号笛，应采取的避让措施是","options":["向右转向并加速通过","向左转向并减速停车","保持航向并鸣笛回应","立即抛锚停船等待雾散"],"answer":[1],"explanation":"知识点是雾航避碰。听到右前方来船声号，说明来船可能在本船右舷正横以前，应向左转向并减速停车以增大安全距离。向右转向会接近来船；保持航向不避让有碰撞风险；立即抛锚可能阻碍航道且未必安全。"},{"id":173,"type":"single","stem":"渔船在湖泊航行时，发现船体因碰撞出现破口进水，最先应采取的堵漏措施是","options":["用棉被包裹破口外侧","用堵漏毯从船外覆盖破口","用木楔从船内打入破口","用水泥从船内封堵破口"],"answer":[2],"explanation":"知识点是船体破口应急堵漏。小破口应优先从船内用木楔、堵漏垫等打入或压紧，利用水压使堵漏材料贴紧。棉被包裹外侧不易固定；堵漏毯多用于较大破口且需从船外操作；水泥封堵需时间固化，不适合紧急堵漏。"},{"id":174,"type":"single","stem":"渔船在江河中顺流航行时，前方发现有人落水，正确的救助操纵方法是","options":["立即停车并满舵向落水者一侧回转","加速前进绕到落水者上游","保持航向并倒车接近落水者","减速后从落水者下游接近"],"answer":[0],"explanation":"知识点是落水救助操纵。顺流航行时应立即停车并向落水者一侧满舵回转，利用船舶回转惯性使船尾靠近落水者，便于救援。加速前进会远离落水者；保持航向倒车难以控制船位；从下游接近会因水流将落水者冲离。"},{"id":175,"type":"single","stem":"内陆渔船在夏季高温时段作业，发现船员出现头晕、恶心、皮肤湿冷，初步判断为中暑先兆，正确的现场处置是","options":["让其在甲板暴晒处休息","将其移至阴凉通风处并补充淡盐水","立即让其饮用大量冰水","让其继续作业并观察症状变化"],"answer":[1],"explanation":"知识点是中暑先兆的现场急救。应迅速将患者移至阴凉通风处，补充淡盐水以纠正水电解质紊乱。暴晒处会加重病情；大量冰水易引起胃肠痉挛；继续作业会延误救治。"},{"id":176,"type":"single","stem":"渔船在河道中航行时，发现前方有渔网横跨航道，正确的处置方式是","options":["加速从渔网一端绕过","减速并鸣笛示意收网","停车等待渔网收起","从渔网中间穿过"],"answer":[2],"explanation":"知识点是渔场避让与安全航行。横跨航道的渔网会缠绕螺旋桨，应停车等待收网，确保安全。加速绕过可能因水流或网具漂移仍缠桨；鸣笛示意收网不能立即消除危险；从中间穿过极易缠桨。"},{"id":177,"type":"multi","stem":"内陆渔船在夜间锚泊时，为防止走锚和碰撞，应做到的措施包括","options":["显示规定的锚泊号灯","安排专人值班瞭望","根据水位变化及时调整锚链","锚泊期间关闭所有灯光","在船首悬挂白色环照灯"],"answer":[0,1,2],"explanation":"知识点是锚泊安全值班要求。应显示锚泊号灯、安排专人值班瞭望、根据水位调整锚链长度。关闭所有灯光会失去被识别机会；船首悬挂白色环照灯不是锚泊号灯规定，锚泊号灯应为白色环照灯但位置和数量有专门要求，仅船首一盏不符合规定。"},{"id":178,"type":"single","stem":"内陆渔船在狭窄河段掉头时，为减小船尾扫向岸边障碍物的风险，应优先选择的操作是","options":["先倒车使船尾离开障碍物一侧，再进车转向","加大油门快速完成掉头以减少暴露时间","保持正车并一次性满舵到底完成掉头","先抛锚固定船首再靠水流带动船尾转向"],"answer":[0],"explanation":"知识点：狭窄水域掉头时的船尾偏摆控制。正确项利用倒车改变船尾偏摆方向，可把船尾先推离障碍物一侧，再进车转向更安全。快速掉头会因惯性使船尾扫幅更大；一次性满舵在狭窄河段容易使船尾甩向岸边；抛锚固定船首会失去主动控制且可能走锚。"},{"id":179,"type":"single","stem":"内陆渔船柴油机运转中机油压力表读数突然降至接近零，同时伴有机油报警，正确的下一步处置是","options":["立即减速并就近择地停机检查润滑系统","维持当前转速观察压力是否自行恢复","加大油门提高转速以带动机油泵供油","先关闭冷却水再停机以防缸体骤冷"],"answer":[0],"explanation":"知识点：机油压力骤降的应急判断。机油压力骤降说明润滑可能失效，应立即减速并择地停机检查，防止抱轴烧瓦。维持转速观察会扩大磨损；加油门提高转速会加剧缺油损坏；先关冷却水与润滑故障无关，且突然停水不利散热。"},{"id":180,"type":"single","stem":"内陆渔船在湖泊航行中舵机失灵、船舶开始偏转，驾驶员的正确处置顺序是","options":["先减速并利用车叶差动控制航向，再择地抛锚","先停车让船失去动力，等待船舶自然停住","先满舵尝试恢复，再加速摆脱偏转趋势","先抛锚固定船首，再进车调整船尾方向"],"answer":[0],"explanation":"知识点：舵机失灵时的应急操船。舵机失灵后应先减速，用双车（或单车配合）差动控制航向，再择地抛锚，避免高速偏转碰撞。先停车会完全失去控制；满舵加加速会加剧偏转；先抛锚固定船首在仍有速度时易导致走锚或横倾。"},{"id":181,"type":"single","stem":"内陆渔船在河道顺流下航时，发现前方有横流且航道变窄，为保持舵效和航向稳定，通常应","options":["适当提高车速以增加舵效并提前修正航向","立即停车让船随流漂过横流区","把船头对准横流来向再减速通过","尽量靠航道外侧低速缓慢通过"],"answer":[0],"explanation":"知识点：横流与狭窄航道中的操船。适当提高车速可增加舵效，提前修正航向能抵消横流推压。停车会让船失去舵效随流漂移；把船头对准横流来向会打乱航向；靠外侧低速通过反而更易被横流推压。"},{"id":182,"type":"single","stem":"内陆渔船在夜间航行时，发现前方水面有密集反光带且伴有水花，最可能的情况是","options":["前方有渔网或障碍物，应减速并绕行","前方是月光反射的平静水面，可保持航速","前方是浅滩标志，应加速通过","前方是正常水流，按原航向继续"],"answer":[0],"explanation":"知识点：夜间水面异常反光的判断。密集反光带加水花常是渔网、网箱或障碍物，应减速并绕行。月光反射通常较均匀且无持续水花；浅滩标志需结合航标判断，不应加速；正常水流不会形成密集反光带。"},{"id":183,"type":"single","stem":"内陆渔船机舱内闻到焦糊味并看到某电器线路冒烟，正确的第一步处置是","options":["先切断该线路电源，再用干粉灭火器处置","先用水浇灭冒烟点，再断开电源","先打开机舱门窗通风，再用手拔掉冒烟线路","先启动主发动机供电，再检查冒烟原因"],"answer":[0],"explanation":"知识点：电气火灾的初期处置。应先切断电源，再用干粉或二氧化碳灭火器处置，防止触电和复燃。用水浇带电设备会触电；通风会助燃并可能扩大火势；启动发动机供电会加剧线路故障。"},{"id":184,"type":"single","stem":"内陆渔船在浅水区航行时，螺旋桨容易吸底泥导致主机负荷增大，正确应对是","options":["适当减速并调整航向驶向较深水域","加大油门快速冲过浅水区","立即停车并抛锚等待水位上涨","保持原速并频繁左右满舵摆脱吸力"],"answer":[0],"explanation":"知识点：浅水区螺旋桨吸底与主机负荷。适当减速并驶向较深水域可减少吸底和负荷。加大油门会加剧吸底；立即停车抛锚可能使船搁浅；频繁满舵不能解决吸底且可能损坏舵机。"},{"id":185,"type":"single","stem":"内陆渔船在靠泊时，若船首已接近码头而船尾仍受水流推压，正确的做法是","options":["用倒车制动并配合缆绳控制船尾靠拢","用正车顶住码头再慢慢收缆","先解掉船首缆让船尾自然漂靠","用满舵使船尾快速甩向码头"],"answer":[0],"explanation":"知识点：靠泊时的船位控制。船首接近码头而船尾受流推压时，用倒车制动并配合缆绳控制船尾靠拢最稳妥。正车顶码头会撞击码头；先解船首缆会失去控制；满舵甩尾易碰撞码头或他船。"},{"id":186,"type":"single","stem":"内陆渔船在航行中发现船体某处焊缝渗水，且渗水量随航速增加而增大，正确处置是","options":["立即减速并就近选择缓流浅滩抢滩检查","保持航速并派人用棉絮从外侧堵漏","加速驶向目的地以便尽快上排修理","先关闭舱底排水阀再继续航行"],"answer":[0],"explanation":"知识点：船体渗水的应急判断。渗水随航速增加说明水压影响明显，应立即减速并抢滩检查，防止扩大。保持航速会加大渗水；加速会使情况恶化；关闭排水阀会使舱底积水无法排出。"},{"id":187,"type":"single","stem":"内陆渔船在内河航道中与来船对遇，为避免碰撞，通常应采取的避让行动是","options":["各自向右转向，从对方左舷通过","各自向左转向，从对方右舷通过","保持航向航速，等待对方先让","加速抢在对方船头前通过"],"answer":[0],"explanation":"知识点：内河对遇局面的避让规则。对遇时应各自向右转向，从对方左舷通过，形成一致避让。向左转向会形成交叉危险；保持航向等待可能错过避让时机；加速抢头极易碰撞。"},{"id":188,"type":"single","stem":"内陆渔船在雷雨天气航行时，为降低雷击风险，正确的做法是","options":["关闭无线电天线并让人员远离桅杆和金属索具","把渔网和金属工具集中放在驾驶室顶部","继续使用无线电设备保持对外联络","让人员集中到船首甲板观察航向"],"answer":[0],"explanation":"知识点：雷雨天气的防雷措施。应关闭无线电天线，人员远离桅杆和金属索具，减少引雷和触电风险。金属工具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失控。正确项净空高度与水流是过桥安全的核心参数。渔获、船员分工、主机小时数与过桥孔安全无直接关系，三者均不符题意。"},{"id":210,"type":"single","stem":"在内河航道驾驶渔船时，遇到前方有横越航道的渡船，应当采取的措施是","options":["加速从渡船船首通过","减速并鸣笛示意后从渡船船尾通过","保持航向航速并持续鸣笛","向左转向与渡船对驶通过"],"answer":[1],"explanation":"知识点：内河避碰规则中横越船与直航船的关系。渡船横越航道时，渔船作为直航船应减速、鸣笛示意并让渡船先行，从船尾通过最安全；加速从船首通过会与渡船抢道，保持航向航速不避让违反让路要求，向左转向对驶会进入渡船航行路径，均属危险做法。"},{"id":211,"type":"single","stem":"内陆渔船柴油机启动后机油压力表长时间指零，正确的处置是","options":["继续怠速运转观察几分钟","加大油门提高转速看压力是否上升","立即停机检查机油油位和油路","关闭机油阀后重新启动"],"answer":[2],"explanation":"知识点：柴油机润滑系统异常判断。机油压力为零说明润滑系统未建立油压，继续运转会烧瓦拉缸，应立即停机检查；怠速观察和加大油门都会加剧干摩擦损坏；关闭机油阀会使油路彻底断油，属于错误操作。"},{"id":212,"type":"single","stem":"渔船在湖泊夜间锚泊时，按规定应当显示的号灯是","options":["白色环照灯一盏","红色环照灯一盏","白色锚灯一盏","红白两色各一盏"],"answer":[2],"explanation":"知识点：内河船舶号灯显示规则。锚泊船舶夜间应显示白色锚灯，使周围船舶能判断其锚泊状态；红色环照灯是失控船或操纵能力受限船的信号，白色环照灯表述不准确，红白两色组合非锚泊船号灯要求。"},{"id":213,"type":"single","stem":"渔船在狭窄航道与来船对遇时，应当鸣放的声号是","options":["一长声","两长声","一长一短声","两长一短声"],"answer":[0],"explanation":"知识点：内河船舶声号含义。对遇时鸣一长声表示要求各自向右让开，是标准对遇声号；两长声表示要求从左舷会船，一长一短声是追越声号，两长一短声不是对遇的规定声号。"},{"id":214,"type":"single","stem":"内陆渔船在浅水区航行时，出现舵效明显变差、船体下沉的现象，主要原因是","options":["螺旋桨吸入空气产生空泡","浅水效应使船底水流受阻","舵叶被水草缠绕","主机转速突然下降"],"answer":[1],"explanation":"知识点：浅水效应对渔船操纵的影响。浅水区船底与河床间隙小，水流受阻导致船体下沉、舵效变差；螺旋桨空泡多发生在桨叶负荷过大或吸气时，水草缠绕会伴有异响和抖动，主机转速下降属于动力故障，均与浅水效应的典型表现不符。"},{"id":215,"type":"single","stem":"渔船在江河中顺流下网作业时，为防止渔网被螺旋桨缠绕，正确的做法是","options":["将网从船尾正后方直接放出","从船舷一侧放出并使船与网保持间距","先停车待船完全静止后再放网","把网绳系在船尾缆桩上随船拖带"],"answer":[1],"explanation":"知识点：内陆渔船放网操作安全。从船舷一侧放出并保持船网间距可避免网具卷入螺旋桨；从船尾正后方放网正好进入螺旋桨尾流区；先停车再放网会失去舵效难以控制船位；把网绳系在船尾缆桩随船拖带容易使网靠近桨叶。"},{"id":216,"type":"single","stem":"渔船在雾天能见度不良水域航行时，除鸣放雾号外还应当","options":["保持正常航速以便尽快驶出雾区","减速并将船员安排到船首瞭望","关闭主机随水流漂航等雾散","开启全部照明灯并加速通过"],"answer":[1],"explanation":"知识点：能见度不良时的航行安全措施。雾中应减速、加强瞭望并派人到船首听声观察；保持正常航速来不及避让，关闭主机漂航会失去控制，开启全部照明并加速既违规又危险。"},{"id":217,"type":"single","stem":"渔船在码头停靠后，船员离船前对燃油系统的正确处置是","options":["关闭燃油速闭阀并检查有无渗漏","保持阀门开启以便下次直接启动","放空日用油柜避免油料变质","打开油箱盖通风防止油气积聚"],"answer":[0],"explanation":"知识点：渔船停泊防火安全。离船前关闭燃油速闭阀并检查渗漏可防止火灾；保持阀门开启存在漏油隐患，放空日用油柜无必要且影响下次使用，打开油箱盖会使油气外泄增加爆炸风险。"},{"id":218,"type":"single","stem":"渔船在航行中发现有人落水，在立即停车的同时应当采取的措施是","options":["向落水者一侧满舵使船尾避开","向落水者相反一侧满舵快速掉头","保持原航向倒车接近落水者","加速绕到落水者上游再施救"],"answer":[0],"explanation":"知识点：人员落水应急操纵。应立即停车并向落水者一侧转舵，使船尾摆开避免螺旋桨伤害落水者；向相反一侧满舵会使船体转向远离，保持原航向倒车可能使落水者卷入桨叶，加速绕上游延误救援且水流可能冲走落水者。"},{"id":219,"type":"single","stem":"某渔船在河道弯道处与一艘下行船相遇，该船处于上行且弯道外侧，正确做法是","options":["上行船主动减速并让出深水航道","下行船应加速抢先通过弯道","两船均保持原速鸣笛示意","上行船靠弯道内侧等待下行船"],"answer":[0],"explanation":"知识点：弯道相遇时的避让责任。上行船通常处于被水流推压、操纵较难的一方，应减速并让出深水航道给下行船；下行船加速抢道会加大碰撞风险，两船保持原速不避让违反避碰要求，上行船靠弯道内侧可能搁浅。"},{"id":220,"type":"multi","stem":"内陆渔船在冬季停航期间，为防止主机冻裂和蓄电池损坏，应当采取的措施包括","options":["放净机体和管路内的冷却水","拆下蓄电池存放在干燥温暖处","排空燃油系统所有油料","对船体进行防冻覆盖和检查","定期启动主机短时运转"],"answer":[0,1,3],"explanation":"知识点：渔船冬季停航维护。放净冷却水可防止结冰冻裂机体，蓄电池拆下保温可防止亏电冻损，船体覆盖检查能防冻害；排空燃油系统无必要且会使油路进入空气影响来年启动，定期启动需有暖机条件否则反而加剧磨损。"},{"id":221,"type":"single","stem":"内陆渔船在狭窄河道顺流下航时，为保持舵效并控制船位，驾驶员通常应把主机转速控制在什么状态","options":["保持中速以上使舵效充足","降至微速并随时准备倒车","停车利用水流自然下漂","交替进车与停车控制船位"],"answer":[1],"explanation":"知识点：狭窄河道顺流下航的操纵要领。正确项：微速进车既保留舵效又能在遇障碍时迅速倒车制动，是标准做法。A项中速以上会使船速过快、反应距离不足；C项停车后舵效消失、船位难以控制；D项交替进停车会使船速忽快忽慢，反而增加操纵难度。"},{"id":222,"type":"single","stem":"内陆渔船在湖泊遭遇雷暴大风时，船员首先应完成的动作是","options":["立即收网并加速返港","穿好救生衣并降低重心","关闭主机防止进水熄火","集中人员到船首压住船头"],"answer":[1],"explanation":"知识点：恶劣天气应急程序。正确项：先保障人员防护（穿救生衣、降低重心）再考虑操纵，是应急第一顺位。A项未做人员防护就加速返港，风浪中风险更高；C项关闭主机会失去动力和舵效，反而更危险；D项人员集中船首会加剧纵摇和上浪。"},{"id":223,"type":"single","stem":"内陆渔船柴油机运转中水温突然升高且排气管冒白烟，最可能的原因是","options":["喷油提前角过大","冷却水泵叶轮损坏","机油黏度过高","燃油滤清器堵塞"],"answer":[1],"explanation":"知识点：柴油机异常工况判断。正确项：水温骤升伴白烟，多为冷却水循环中断，水泵叶轮损坏是常见原因。A项喷油提前角过大会引起敲缸和黑烟；C项机油黏度过高影响润滑而非水温；D项燃油滤清器堵塞表现为功率下降、起动困难，不会直接导致水温骤升。"},{"id":224,"type":"single","stem":"渔船在内河航道夜航时，看到前方来船显示红、绿两盏舷灯和两盏白灯，说明对方是","options":["正在掉头的船舶","正在横越的船舶","正在锚泊的船舶","正在追越的船舶"],"answer":[0],"explanation":"知识点：内河避碰号灯识别。正确项：显示红绿舷灯加两盏白灯是掉头船或操纵能力受限船在掉头时的典型灯号。B项横越船通常只显示舷灯和尾灯；C项锚泊船显示锚灯，不显示舷灯；D项追越船从后方接近，看到的是尾灯而非舷灯组合。"},{"id":225,"type":"single","stem":"内陆渔船在浅水区航行时发现舵效明显变差、船首偏转迟钝，最恰当的处理是","options":["加大油门提高航速","适当降低航速并减小舵角","立即停车等待水深恢复","改用倒车操纵方向"],"answer":[1],"explanation":"知识点：浅水效应对操纵的影响。正确项：浅水区舵效下降，降速并减小舵角可减少吸底和偏转，保持可控。A项加大油门会加剧吸底和船体下沉；C项停车会完全失去舵效；D项倒车不能替代正常操舵且易损舵系。"},{"id":226,"type":"single","stem":"内陆渔船轮机员发现主机机油压力表读数持续偏低但机油量正常，下一步应优先检查","options":["机油滤清器是否堵塞","冷却水温是否过高","蓄电池电压是否不足","螺旋桨是否缠草"],"answer":[0],"explanation":"知识点：润滑系统故障排查。正确项：机油量正常而压力偏低，最常见是滤清器堵塞或油路不畅，应优先检查。B项冷却水温高会引起机油温度升高但非首查项；C项电压不足影响起动和电气，不直接导致油压低；D项螺旋桨缠草影响负荷和转速，不改变油压读数。"},{"id":227,"type":"single","stem":"内陆渔船在码头靠泊时，若水流从船尾方向推来，驾驶员应采用的靠泊方式是","options":["顶流靠泊并控制船首","顺流靠泊并提前倒车","横流靠泊并加大舵角","抛锚后慢慢漂靠"],"answer":[0],"explanation":"知识点：靠泊操纵与水流关系。正确项：有尾向来流时应顶流靠泊，利用水流帮助控制船首，便于平稳贴靠。B项顺流靠泊会使船速叠加、难以制动；C项横流靠泊易使船体横压码头；D项抛锚漂靠不可控，易碰撞码头。"},{"id":228,"type":"single","stem":"内陆渔船在航行中发现船舱进水且进水速度较快，船员首先应","options":["立即全员弃船跳水","迅速堵漏并排水","加速返航抢滩","关闭所有舱门等待救援"],"answer":[1],"explanation":"知识点：进水应急程序。正确项：先组织堵漏并启动排水，控制进水速度，是标准处置顺序。A项弃船跳水在未评估情况下风险极高；C项加速返航会加剧进水；D项关闭舱门等待会延误自救时机。"},{"id":229,"type":"single","stem":"内陆渔船使用锚泊时，若发现锚链受力过大且船首偏摆剧烈，较合理的调整是","options":["增加锚链长度","减小锚链长度","收紧锚链至垂直","加抛第二只锚"],"answer":[0],"explanation":"知识点：锚泊受力调整。正确项：适当增加锚链长度可增大悬链线缓冲，减小冲击受力。B项减小锚链长度会加剧受力；C项收紧至垂直会使锚链失去缓冲并可能走锚；D项加抛第二只锚是走锚后的措施，不是受力偏摆的首选调整。"},{"id":230,"type":"single","stem":"内陆渔船轮机员在起动柴油机前，发现油底壳油位略高于上限且机油发白，应","options":["直接起动观察运转","查明进水原因并换油","放出多余机油后起动","加热机油使其变清"],"answer":[1],"explanation":"知识点：机油乳化与进水判断。正确项：机油发白说明混入冷却水，必须查明原因并更换机油，否则会损坏轴承。A项直接起动会加剧磨损；C项只放油不查原因会再次乳化；D项加热不能去除水分且掩盖故障。"},{"id":231,"type":"single","stem":"内陆渔船在狭窄河道顺流航行需要减速时，正确操作是","options":["先收油门再适时挂倒挡制动","直接挂空挡让船自然减速","先挂倒挡再收油门","关闭发动机利用水流减速"],"answer":[0],"explanation":"知识点：顺流减速操作程序。顺流时水流推船前进，应先收油门降低螺旋桨推力，再适时挂倒挡产生反向推力制动；直接挂空挡会失去动力控制、船随流漂移；先挂倒挡再收油门会造成倒挡与前进挡冲突、损伤传动；关闭发动机会失去舵效和制动能力，极危险。"},{"id":232,"type":"single","stem":"内陆渔船柴油机运转中机油压力突然降至零，首先应做的处置是","options":["立即停车检查润滑系统","继续低速运转观察压力变化","加大油门提高机油泵转速","先补加机油再继续航行"],"answer":[0],"explanation":"知识点：机油压力突降的应急判断。机油压力突降为零说明润滑可能中断，继续运转会烧瓦抱轴，必须立即停车检查；低速观察会扩大损伤；加大油门会加剧磨损；补加机油不能解决油泵故障或油路堵塞，且运转中补加无效。"},{"id":233,"type":"single","stem":"内河渔船在能见度不足50米的浓雾中航行，正确的做法是","options":["选择安全水域锚泊并显示号灯","保持原速开启雾灯继续航行","靠向岸边缓慢摸索前进","加速驶向最近码头停靠"],"answer":[0],"explanation":"知识点：雾航安全规则。能见度极低时应选择安全水域锚泊，按规定显示锚泊号灯并鸣放雾号；保持原速或加速都极易碰撞；靠岸摸索可能搁浅或撞岸。"},{"id":234,"type":"single","stem":"内陆渔船螺旋桨被水草缠绕后，驾驶员首先应","options":["停车后确认情况再处理","加大油门冲脱缠绕物","挂倒挡反复冲击水草","保持运转继续航行"],"answer":[0],"explanation":"知识点：螺旋桨缠绕应急处置。应先停车，防止缠绕加剧或伤及人员，确认情况后再清理；加大油门或反复倒挡冲击可能损坏桨叶和轴系；保持运转会导致过热和动力丧失。"},{"id":235,"type":"single","stem":"内陆渔船在夜间航行时，发现前方有他船显示红灯和绿灯，说明该船","options":["正对驶来，应向右避让","正在横越，应停车等待","同向行驶，应保持距离","正在锚泊，应绕行通过"],"answer":[0],"explanation":"知识点：号灯识别与避让。同时看到红绿两舷灯说明来船船首正对本船，属对遇局面，应各自向右转避让；横越局面通常只看到一舷灯和尾灯；同向只能看到尾灯；锚泊船显示锚灯而非两舷灯。"},{"id":236,"type":"single","stem":"渔船在湖泊航行中舵机失灵，最稳妥的应急措施是","options":["减速并用车桨配合控制航向","立即停车等待救援","加大油门冲向浅滩","派人到船尾手动扳舵"],"answer":[0],"explanation":"知识点：舵机失灵应急。应减速利用左右螺旋桨差动或正倒车配合控制航向，择机锚泊；立即停车会失去控制漂移；加大油门冲向浅滩会搁浅受损；航行中派人到船尾扳舵极危险且多数船无此结构。"},{"id":237,"type":"single","stem":"内陆渔船在靠泊时，正确使用缆绳的做法是","options":["先带首缆再带尾缆并逐渐收紧","同时快速收紧首尾缆","先带尾缆再带首缆并一次收紧","只带一根缆绳固定船身"],"answer":[0],"explanation":"知识点：靠泊带缆程序。应先带首缆稳住船头，再带尾缆，逐渐收紧调整；同时快速收紧易使船身受冲击；先尾后首且一次收紧船头会甩向码头；单缆无法固定船身。"},{"id":238,"type":"single","stem":"渔船在航行中发现船体漏水且进水量较大，首先应","options":["立即停车堵漏并组织排水","加速驶向岸边抢滩","继续航行到码头再处理","打开舱底阀向外排水"],"answer":[0],"explanation":"知识点：船体破损进水应急。应先停车减少水流冲击，组织堵漏和排水；加速会加剧进水；继续航行延误处置；打开舱底阀会引入更多水。"},{"id":239,"type":"multi","stem":"内陆渔船在下列哪些情况下应当禁止离港或停止作业","options":["船员配备低于最低安全配员","救生消防设备缺失且未补齐","船体出现影响稳性的裂纹","船用燃油价格大幅上涨","渔获物市场价格走低"],"answer":[0,1,2],"explanation":"知识点：适航与禁航条件。配员不足、救生消防设备缺失、船体影响稳性的裂纹都属于不适航状态，应禁止离港或停止作业；燃油价格和鱼价属于市场因素，与船舶安全适航无关。"},{"id":240,"type":"single","stem":"内陆渔船在狭窄航道与来船对遇时，驾驶员的正确避让操作是","options":["鸣一长声并向右转向","鸣二长声并向右转向","鸣一短声并向右转向","鸣一短声并向左转向"],"answer":[2],"explanation":"知识点是内河避碰声号与转向规则。对遇时鸣一短声表示本船向右转向，双方各自向右避让可安全通过；鸣一长声通常表示警告或要求让路，不用于表明本船转向；鸣二长声无对应转向含义；鸣一短声却向左转向与声号含义相矛盾，会让来船误判本船动向。"},{"id":241,"type":"single","stem":"单缸柴油机为渔船挂桨提供动力，启动后机油压力表指针长时间指向零位，正确的下一步操作是","options":["立即停机检查机油油路","加大油门提高机油压力","继续怠速运转观察几分钟","拆下机油压力表直接更换"],"answer":[0],"explanation":"知识点是柴油机润滑系统异常处置。机油压力长时间为零说明润滑系统可能失效，继续运转会造成拉缸烧瓦，必须立即停机检查；加大油门会加剧磨损且不能建立油压；怠速继续运转同样会造成干摩擦损坏；压力表读数异常应先排查油路和感应塞，直接换表属于盲目处理，不能消除真实故障。"},{"id":242,"type":"single","stem":"渔船在江河急流中顺流下漂时，为便于控制船位和应对突发横流，驾驶员通常应保持的航态是","options":["船头略偏向下游斜向行驶","船头正对下游全力加速","船尾朝下顺流直漂","横向正对水流缓慢下漂"],"answer":[0],"explanation":"知识点是急流中渔船操纵。船头略偏向下游斜向行驶可保留一定舵效和动力余量，遇到横流或障碍能及时调整；船头正对下游全力加速会失去对船位的精细控制，遇障碍难以及时避开；船尾朝下直漂使驾驶员失去前方视野和主动控制能力；横向正对水流下漂极易被水流推压失控甚至倾覆。"},{"id":243,"type":"single","stem":"内陆渔船挂桨机传动轴处缠入水草后船舶抖动加剧，正确的处置顺序是","options":["先减速脱挡再停机清理水草","先加大油门甩掉水草再减速","先停机再下水用手直接拽扯","先保持航速返航再上岸清理"],"answer":[0],"explanation":"知识点是挂桨机异物缠绕处置。正确顺序是先减速脱挡让螺旋桨停止受力，再停机后清理，防止清理时桨叶突然转动伤人；加大油门甩水草会使缠绕更紧并可能损坏传动轴；停机后立即下水拽扯虽停了机，但未先脱挡和确认桨叶静止，仍存在被转动部件伤及的风险；保持航速返航会加剧抖动，可能导致轴承和轴系损坏。"},{"id":244,"type":"single","stem":"渔船在湖泊中航行时舵机突然失灵、舵叶卡在左满舵位置，驾驶员首先应","options":["减速并用车桨配合控制航向","立即加大油门冲出危险区","马上停机等待救援拖带","迅速倒车使船舶后退"],"answer":[0],"explanation":"知识点是舵机失灵应急操纵。舵叶卡死时可通过减速并利用左右桨（或挂桨）推力差配合控制航向，争取驶向安全水域；加大油门会使船舶在偏转状态下高速冲向危险；立即停机等待拖带在急流或航道中可能造成漂移碰撞；迅速倒车虽能减速，但不能替代航向控制，且可能使船尾偏向更危险方向。"},{"id":245,"type":"single","stem":"内陆渔船按规定配备的救生衣，其正确穿着状态是","options":["系紧所有带扣并贴合身体","只系腰部带扣便于活动","搭在肩上遇险时再穿","放在座位下随取随用"],"answer":[0],"explanation":"知识点是救生衣正确穿着。救生衣必须系紧全部带扣并贴合身体，落水后才能提供有效浮力且不被水流冲脱；只系腰部带扣在落水时救生衣会上浮脱离躯干；搭在肩上遇险再穿往往来不及；放在座位下随取随用不能保证紧急瞬间及时穿上，均不符合救生衣穿着要求。"},{"id":246,"type":"single","stem":"渔船在江河航行中发现船首前方水下有渔网标记浮标，正确的避让做法是","options":["减速并从浮标下游侧绕行","保持航速从浮标上游侧通过","加速从两浮标中间直线穿过","停车等待浮标漂离后再走"],"answer":[0],"explanation":"知识点是渔网碍航避让。发现渔网浮标应减速并判断网具走向，从浮标下游侧绕行可避免挂住网具；保持航速从上游侧通过可能因水流把网具推向船底而缠桨；加速从两浮标中间穿过正好进入网具范围，极易缠桨；停车等待在航道中会失去舵效并妨碍他船，不是正确处置。"},{"id":247,"type":"single","stem":"内陆渔船主机运转中冷却水温突然升高并伴随排气管冒白烟，最可能的原因是","options":["冷却水泵叶轮损坏或水路堵塞","燃油箱油量不足供油中断","喷油提前角略微偏大","蓄电池充电电流偏大"],"answer":[0],"explanation":"知识点是柴油机冷却系统故障判断。水温突升并冒白烟，多因冷却水循环失效使缸体过热、水汽随排气排出，常见于水泵叶轮损坏或水路堵塞；燃油不足会表现为功率下降甚至停机，不会直接造成水温骤升；喷油提前角偏大会引起敲缸和过热但通常渐进出现，不是突升主因；蓄电池充电电流偏大属于电气问题，与冷却水温无直接关系。"},{"id":248,"type":"single","stem":"渔船在湖泊遇雷暴大风天气，正确的防抗措施是","options":["就近选择背风岸湾锚泊避风","继续航行抢在风前赶回港","将船横在风浪中增大稳性","全员集中在船首压低船头"],"answer":[0],"explanation":"知识点是渔船防抗大风。遇雷暴大风应就近选背风岸湾锚泊避风，缩短暴露时间；继续航行抢风前赶港可能在途中遭遇大风正面袭击；将船横在风浪中会增大横倾和倾覆风险；全员集中船首压低船头会改变船舶稳性并妨碍应急操作，均不安全。"},{"id":249,"type":"single","stem":"渔船在夜间航行时发现前方水面有异常反光并伴有漂浮物，判断可能为暗桩或沉船残骸，正确处置是","options":["减速并用探照灯确认后绕行","保持航速从反光点一侧通过","加速从反光点正上方越过","停车等待天亮后再继续航行"],"answer":[0],"explanation":"知识点是夜间碍航物判断与避让。夜间发现异常反光应减速并用探照灯确认碍航物位置，再选择安全一侧绕行；保持航速通过来不及应对突发情况；加速从正上方越过可能直接撞击暗桩或残骸；停车等待天亮会长时间滞留在危险水域并影响他船航行，不是正确处置。"},{"id":250,"type":"multi","stem":"内陆渔船在江河航行中需要横越航道时，应做到的操作有","options":["提前观察上下行船舶动态","鸣号示意并选择无船空档横越","横越时保持足够航速尽快通过","在航道弯道处就近横越缩短航程","横越前减速停车等待他船让路"],"answer":[0,1,2],"explanation":"知识点是横越航道操作要求。横越前应观察上下行船舶动态，鸣号示意并选择无船空档，横越中保持足够航速尽快通过，减少占用航道时间；在弯道处横越视线受限、极易与来船形成紧迫局面，属于危险做法；横越前减速停车等待他船让路会使本船失去控制并阻塞航道，不是规定操作。"},{"id":251,"type":"single","stem":"在内河湖泊驾驶渔船时，发现前方航道有横向水流且水色浑浊，正确的处置方式是","options":["保持原速直行通过","减速并向上游侧稍偏航","加速抢在横流前通过","停车等待水流变清"],"answer":[1],"explanation":"知识点为横流航段的操船要领。横流会使船体偏移，减速并向水流来向一侧稍偏航可预留修正余量，故正确。保持原速直行会被推离航道；加速抢行会因船位难控而更危险；停车等待会失去舵效使船被水流带走。"},{"id":252,"type":"single","stem":"内陆渔船在狭窄航道与他船对遇时，应当采取的会让方式是","options":["各自向右靠，从左舷会船","各自向左靠，从右舷会船","吨位小的船主动停车让路","下行船优先并保持原航向"],"answer":[0],"explanation":"知识点为内河对遇会让规则。对遇时应各自向右转向，从左舷通过，故正确。向左靠会形成交叉危险；吨位大小不是内河对遇让路的判定依据；下行船优先不适用于对遇局面。"},{"id":253,"type":"single","stem":"柴油机渔船在运转中机油压力表突然降到接近零，同时伴有异响，正确的处置是","options":["加大油门维持转速观察","立即停车检查润滑系统","先减速运转到码头再查","关闭机油压力表继续航行"],"answer":[1],"explanation":"知识点为润滑系统故障应急。机油压力骤降并伴异响说明润滑失效，应立即停车防止烧瓦，故正确。加大油门会加剧磨损；带故障驶回会造成机损扩大；关闭仪表等于放弃监测。"},{"id":254,"type":"single","stem":"渔船在湖泊作业时舵机失灵、船开始偏转，最优先的应急操作是","options":["立即熄火让船漂停","用主机减速并借双车差速控制","抛下船首锚紧急制动","组织人员转移到船尾"],"answer":[1],"explanation":"情境案例考舵失灵初期处置。先用主机减速并利用双车差速或倒车控制船位，是最快恢复可控的手段，故正确。直接熄火会失去动力控制；船首抛锚在高速时可能拉翻船首；向后甲板集中会加剧纵倾危险。"},{"id":255,"type":"single","stem":"内陆渔船夜航时看到左前方来船显示红、绿两舷灯和桅灯，判断该船正向你驶来，应","options":["保持航向并鸣一短声","向右转向并鸣一短声","向左转向并鸣两短声","减速并鸣三短声"],"answer":[3],"explanation":"知识点为号灯识别与声号。看到红绿两舷灯加桅灯说明来船基本正对对遇，减速并鸣三短声表示正在倒车或减速操作，故正确。一短声表示向右转向并非对遇通用处置；两短声表示向左转向；保持航向不避让违反避碰原则。"},{"id":256,"type":"single","stem":"内河渔船在汛期通过桥区水域时，正确做法是","options":["紧靠桥墩一侧顺流快速通过","选择通航桥孔并减速稳舵通过","在桥区上游掉头观察水情","沿桥孔中线全速通过"],"answer":[1],"explanation":"知识点为桥区水域通航要求。应走通航桥孔、减速稳舵，防止横流和涡流影响，故正确。靠桥墩一侧有回流和碰撞风险；桥区上游掉头易失控；全速通过遇突发横流难修正。"},{"id":257,"type":"single","stem":"渔船蓄电池在船上充电时，舱内出现刺鼻气味，正确的处置是","options":["打开舱盖通风并停止充电","继续充电并加大通风量","用湿布盖住电池降温","立即向电池浇淡水稀释"],"answer":[0],"explanation":"知识点为蓄电池充电安全。刺鼻气味多为充电析出的氢气或酸雾，应停止充电并通风，故正确。继续充电有爆炸风险；湿布覆盖不能消除气体积聚；向电池浇水会损坏电池并可能引起短路。"},{"id":258,"type":"single","stem":"船舶在风浪中航行发生横倾且甲板上浪，为减轻横倾最宜采取的措施是","options":["将全部船员集中到上风舷","调整压载并适当迎浪减速","向一侧舱室快速注水压载","加大油门顶浪通过"],"answer":[1],"explanation":"知识点为风浪中船舶稳性调整。通过调整压载和迎浪减速可减小横倾和上浪，故正确。人员集中上风舷会抬高重心；单侧快速注水易造成过大横倾；加速顶浪会增加上浪和拍击。"},{"id":259,"type":"single","stem":"渔船主机运转中冷却水温过高，检查发现水泵皮带打滑，正确的现场处置是","options":["向冷却水中加冷水降温","调整皮带张紧度或更换皮带","打开节温器强制大循环","降低转速继续观察水温"],"answer":[1],"explanation":"知识点为冷却系统故障排除。水温高的原因是水泵皮带打滑导致循环不足，应调整张紧度或更换，故正确。加冷水会使缸体骤冷开裂；拆节温器不是针对皮带打滑；降速只是暂时缓解不能排除故障。"},{"id":260,"type":"single","stem":"渔船在能见度不良的江面航行时，除按规定鸣放声号外还应","options":["保持全速并频繁变向","减速并用雷达和瞭望加强观察","关闭航行灯减少干扰","靠航道边缘停车等待"],"answer":[1],"explanation":"知识点为能见度不良时的航行要求。应减速、加强瞭望并使用雷达等助航设备，故正确。全速变向易造成碰撞；关闭航行灯违反规定；随意停车等待可能阻塞航道或被追尾。"},{"id":261,"type":"single","stem":"船员落水后，渔船在湖泊中实施救助时正确的接近方式是","options":["从落水者上风侧全速接近","从下风侧低速接近并停车","顺流从落水者后方高速通过","横穿落水者前方再掉头"],"answer":[1],"explanation":"知识点为落水救助操船。应从下风侧低速接近并适时停车，防止螺旋桨伤人，故正确。上风全速接近会使船压向落水者；后方高速通过易被桨叶击伤；横穿前方会形成碰撞危险。"},{"id":262,"type":"multi","stem":"内陆渔船在夜间锚泊时，为防止走锚和被他船碰撞，应当做好的措施有","options":["按规定显示锚泊号灯","测定锚位并定时核对","锚链放足并保持值班瞭望","将船舶停在主航道中央","关闭所有灯光保持安静"],"answer":[0,1,2],"explanation":"知识点为锚泊值班与号灯显示。显示锚泊号灯、测定锚位核对、放足锚链并保持瞭望都是防走锚和防碰撞的基本措施，故正确。停在主航道中央会妨碍通航也易被撞；关闭灯光会使他船无法发现本船。"},{"id":263,"type":"single","stem":"内陆渔船在狭窄河道顺流航行时，为便于控制船位和随时停车，驾驶操作上通常应保持的航速状态是","options":["保持主机中速以上以便舵效充足","以能维持舵效的最低安全航速行驶","完全停车靠水流带船下行","交替采用快车与停车的方式下行"],"answer":[1],"explanation":"知识点：狭窄河道顺流航行的安全航速控制。正确项以能维持舵效的最低安全航速行驶，既保证操纵性又留出应急反应时间。错误项保持中速以上会缩短反应距离、增大碰撞风险；完全停车会失去舵效无法控制船位；交替快车停车会造成船速忽快忽慢，反而难以预判和避险。"},{"id":264,"type":"single","stem":"内陆渔船柴油机运转中机油压力表读数突然降到接近零，而水温、油温正常，首先应当采取的措施是","options":["继续观察压力变化再决定是否停机","立即减速并检查机油油位和滤清器","加大油门提高转速以提升油压","停机后直接向曲轴箱补加机油至上限"],"answer":[1],"explanation":"知识点：柴油机机油压力骤降的应急处置。正确项立即减速并检查机油油位和滤清器，可在保护机器的同时快速查明原因。错误项继续观察会加剧轴瓦磨损；加大油门会使缺油状态下转速更高、损坏更快；未查明原因直接补油可能掩盖管路泄漏或泵故障等真实问题。"},{"id":265,"type":"single","stem":"渔船在湖泊中锚泊时，判断锚已抓牢底质、船位不再漂移，主要依据是","options":["锚链始终保持紧绷并垂直向下","船首方向与风向保持固定夹角","锚链出现规律性间歇抖动","船位与岸上固定物标方位不再变化"],"answer":[3],"explanation":"知识点：锚泊抓牢的判断方法。正确项通过船位与岸上固定物标方位不再变化，可直接判断船位稳定。错误项锚链紧绷垂直多为走锚或未放足链长；船首与风向夹角固定只说明受风状态稳定，不能证明锚抓牢；锚链间歇抖动多发生在走锚拖底过程中。"},{"id":266,"type":"single","stem":"内陆渔船在雾中航行时，听到他船雾号从正前方传来，且距离较近，正确的避让操作是","options":["立即加大油门从雾号声源右侧通过","停车并把船停住，判明情况后再行动","保持原航向原速，仅加强瞭望","向左转向并鸣放一长声示意"],"answer":[1],"explanation":"知识点：雾航中近距离来船声号的避让。正确项停车并把船停住，可在能见度极差时避免盲目行动导致碰撞。错误项加大油门通过会缩短反应距离；保持原速瞭望不足以避险；向左转向并鸣号属于未判明情况下的盲目转向，可能正好转入他船航路。"},{"id":267,"type":"single","stem":"内陆渔船在浅水区航行时，舵效明显变差、船体出现异常振动，最可能的原因是","options":["螺旋桨吸入空气产生空泡","船底与河床距离过近使水流受阻","主机转速过低导致扭矩不足","舵叶被水草缠绕失去平衡"],"answer":[1],"explanation":"知识点：浅水效应对渔船操纵的影响。正确项船底与河床距离过近使水流受阻，会造成舵效下降和船体振动。错误项螺旋桨吸入空气多发生在风浪中；主机转速过低影响的是推力而非舵效突变；舵叶缠草会表现为操舵费力或跑舵，与船体整体振动特征不同。"},{"id":268,"type":"single","stem":"渔船在内河航行中需要掉头，且河道宽度有限、水流较急，较稳妥的掉头方法是","options":["直接满舵连续回转掉头","先减速靠边再借水流缓慢掉头","选择水流平缓的宽阔水域分次掉头","迎流加速后突然满舵掉头"],"answer":[2],"explanation":"知识点：受限水域渔船掉头操作。正确项选择水流平缓的宽阔水域分次掉头，可充分利用水域条件并保留修正余地。错误项直接满舵连续回转在窄急流中易失控；靠边借流掉头可能被压向岸边；迎流加速突然满舵会因惯性大而难以控制。"},{"id":269,"type":"single","stem":"内陆渔船船员发现有人落水，在向落水者抛投救生圈时，正确的做法是","options":["直接抛向落水者头部上方","抛在落水者上游一侧任其漂来","抛在落水者上风上游侧靠近处","抛在落水者下游并让其自行抓取"],"answer":[2],"explanation":"知识点：落水救援中救生圈的抛投位置。正确项抛在落水者上风上游侧靠近处，可使救生圈借助风、流漂向落水者。错误项抛向头部上方可能砸伤落水者；抛在上游任其漂来会错过抓取时机；抛在下游则救生圈会漂离落水者。"},{"id":270,"type":"single","stem":"渔船在夜间停泊时，为防止他船碰撞，除显示规定的停泊灯外，还应采取的措施是","options":["关闭全部灯光以节省电源","安排值班人员保持瞭望和守听","将船移至航道中央以便被发现","间歇鸣放声号提醒过往船舶"],"answer":[1],"explanation":"知识点：夜间停泊的安全值守要求。正确项安排值班人员保持瞭望和守听，可及时发现来船并采取避让或提醒措施。错误项关闭全部灯光会使他船难以发现本船；停在航道中央会妨碍通航并增加碰撞风险；间歇鸣放声号会干扰正常航行秩序且非停泊船常规做法。"},{"id":271,"type":"single","stem":"渔船在航行中机舱突然起火，火势较小且尚未蔓延，船员首先应做的处置是","options":["立即打开机舱门窗通风散热","关闭油路和电源后用灭火器灭火","直接向机舱大量灌水降温","先启动主机把船开回码头再灭火"],"answer":[1],"explanation":"知识点：机舱初期火灾的应急处置。正确项关闭油路和电源后用灭火器灭火，可切断燃烧条件并防止火势扩大。错误项打开门窗通风会补充氧气助燃；大量灌水可能造成船舶稳性下降和电气损坏；带火航行会把火灾风险延续到港区。"},{"id":272,"type":"single","stem":"渔船在河道中与来船对遇，双方均靠右行驶且航道条件允许，此时正确的会船方式是","options":["各自向右转向从左舷会船","各自向左转向从右舷会船","保持航向航速从任意一舷通过","减速后停船等对方先通过"],"answer":[1],"explanation":"知识点：内河对遇局面的会船规则。正确项各自向左转向从右舷会船，符合内河靠右行驶的对遇避让习惯。错误项向右转向从左舷会船与靠右行驶原则相悖；任意一舷通过缺乏确定性易生碰撞；减速停船等待会妨碍通航效率且非对遇常规处置。"},{"id":273,"type":"single","stem":"内河渔船在狭水道航行时，为保持船舶在计划航线上，驾驶人员应优先采用哪种转向方式","options":["小角度多次转舵逐步修正","一次性大角度转舵快速对准","频繁左右满舵来回修正","等偏离较大后再集中修正"],"answer":[0],"explanation":"狭水道内水流和岸吸效应明显，小角度多次修正可避免船舶偏摆过大。一次性大角度转舵容易造成船首偏摆过度；频繁满舵会加剧船舶摇摆并增加碰撞风险；等偏离较大再修正往往已接近碍航物。"},{"id":274,"type":"single","stem":"内陆渔船在顺流下航时发现前方有横流汇入，为减小横流对船位的影响，较合理的操作是","options":["提前稍向横流来向一侧取好角度","保持原航向并加速通过汇流区","停车让船随流自然漂过汇流区","向横流去向一侧压舵抵消漂移"],"answer":[0],"explanation":"横流会使船位向下游一侧偏移，提前向横流来向一侧取角可预留偏移量。保持原航向加速仍会被推偏；停车会使舵效变差更易失控；向横流去向一侧压舵会加剧偏移。"},{"id":275,"type":"single","stem":"内河渔船柴油机运转中机油压力突然降至接近零，同时伴有异常敲击声，值班轮机员首先应做的是","options":["立即停车检查润滑系统","降低转速继续观察压力变化","先补充机油再维持低速运转","切换备用油路后继续作业"],"answer":[0],"explanation":"机油压力骤降并伴敲击声多为润滑失效或轴瓦故障征兆，立即停车可防止扩大损坏。降速观察会延误时机；补机油不能解决油道堵塞或泵损；切换油路在故障原因不明时仍可能造成损坏。"},{"id":276,"type":"single","stem":"内河渔船在雾中航行时听到他船雾号来自正前方，且距离较近，正确的处置是","options":["立即减速并做好停车准备","保持航速鸣笛回应并直行","加速抢在他船之前通过","向右转向并继续原速航行"],"answer":[0],"explanation":"雾中正前方近距离来船，应立即减速并把机器备好以便随时停车，避免碰撞。保持航速直行会缩短反应时间；加速通过风险极大；盲目右转可能正好转入他船航向。"},{"id":277,"type":"single","stem":"内河渔船靠泊时，若码头水流较急，为便于控制船身，通常应选择怎样的靠泊角度","options":["以小角度逆流接近码头","以大角度顺流直插码头","平行码头顺流快速贴靠","垂直码头顺流缓慢贴靠"],"answer":[0],"explanation":"逆流靠泊时舵效和车效较好，小角度接近便于控制速度和船位。大角度顺流直插速度难控；平行顺流快速贴靠易撞击码头；垂直顺流贴靠难以调整船首方向。"},{"id":278,"type":"single","stem":"内河渔船在夜间航行时，发现前方水面有白色碎浪花但无明显灯光，驾驶人员应重点判断的是","options":["是否为浅滩或障碍物引起的急流","是否为其他船舶的尾流","是否为月光反射的正常现象","是否为鱼群活动形成的波纹"],"answer":[0],"explanation":"夜间白色碎浪花常是浅滩、暗礁或障碍物处水流紊乱的表现，应重点判断并减速核实。尾流通常有船舶灯光伴随；月光反射多成片且随角度变化；鱼群波纹一般较细碎且不持续。"},{"id":279,"type":"single","stem":"内河渔船主机在冷机启动后立即加负荷运行，最可能造成的后果是","options":["缸套与活塞环磨损加剧","燃油消耗略有增加","排气温度短时偏低","转速波动自行消失"],"answer":[0],"explanation":"冷机时润滑油未充分到达各摩擦面，立即加负荷会加剧缸套与活塞环磨损。油耗略增不是主要危害；排气温度短时偏低属正常；转速波动不会因此自行消失。"},{"id":280,"type":"single","stem":"内河渔船在航行中舵机失灵，且前方有下行船舶驶来，首先应采取的应急措施是","options":["立即减速停车并显示失控信号","加大主机转速以保持舵效","迅速抛锚强行制动船身","向一侧压满舵尝试恢复控制"],"answer":[0],"explanation":"舵机失灵后应立即减速停车，避免高速失控，并显示失控信号提醒他船。加大转速会加剧危险；盲目抛锚可能损坏锚机或使船横转；满舵尝试在舵机故障时通常无效。"},{"id":281,"type":"single","stem":"内河渔船在狭窄河段与对遇船舶交汇时，若双方均靠右行驶仍可能发生碰撞，此时较稳妥的避让方式是","options":["减速并尽量靠右让出深水航道","加速从对方船首前方通过","向左转向从对方左舷通过","保持航向并鸣笛要求对方让路"],"answer":[0],"explanation":"狭窄河段会遇应减速并尽量靠右，留出足够横距和深水航道。加速抢越会缩短反应时间；向左转向违背靠右避让原则；仅鸣笛要求对方让路不能代替本船主动避让。"},{"id":282,"type":"single","stem":"内河渔船在浅水区航行时，船体出现明显下沉和航速下降，驾驶人员应采取的处置是","options":["减速并转向深水一侧航行","加速以尽快驶出浅水区","保持航速并频繁调整航向","停车让船随水流漂出浅区"],"answer":[0],"explanation":"浅水效应会使船体下沉、阻力增大，减速并转向深水可减轻吸底风险。加速会加剧下沉和搁浅风险；频繁调整航向不能解决水深不足；停车漂流可能使船位更不可控。"},{"id":283,"type":"single","stem":"内河渔船机舱发生电气火灾时，在未切断电源前不宜使用哪种灭火剂","options":["水柱直接喷射灭火","干粉灭火剂","二氧化碳灭火剂","七氟丙烷灭火剂"],"answer":[0],"explanation":"未切断电源时水柱导电，可能造成触电并扩大电气损坏。干粉、二氧化碳、七氟丙烷均适用于电气火灾。"},{"id":284,"type":"multi","stem":"内河渔船在台风或强对流天气来临前，为确保停泊安全，应采取的措施包括","options":["加固缆绳并增加防撞靠把","关闭水密门窗并检查排水口","将船上活动物品收妥固定","在船首加抛单锚并放松缆绳","安排人员留守机舱以便随时动车"],"answer":[0,1,2],"explanation":"加固缆绳、增加靠把、关闭水密门窗、检查排水口、收妥活动物品都是防台基本措施。在船首加抛单锚并放松缆绳可能造成走锚或碰撞；安排人员留守机舱不能替代系固和避风措施。"},{"id":285,"type":"single","stem":"内陆渔船在狭窄河道顺流航行需减速时，正确使用主机与舵的配合方式是","options":["先减小油门再适时用舵修正航向","先停车再倒车强行制动","保持油门用满舵转向减速","先换倒挡再加油门控制船位"],"answer":[0],"explanation":"知识点：顺流减速应逐减油门，利用水流与舵配合保持航向。A正确，减油门后船速渐降，再用舵修正。B错在立即倒车易使船失去舵效并可能横转。C错在满舵转向不减速反而增大横倾风险。D错在倒挡加油会加剧主机负荷且船位更难控制。"},{"id":286,"type":"single","stem":"内陆渔船柴油机运转中机油压力表突然降至低位并伴异常敲缸声，首先应做的处置是","options":["立即减速并就近安全停机检查","继续运行观察压力是否回升","加大油门提高机油泵转速","关闭冷却水等待温度下降"],"answer":[0],"explanation":"知识点：机油压力骤降伴敲缸是润滑失效征兆。A正确，减速停机可防止拉缸抱瓦。B错在继续运行会扩大机械损伤。C错在加油门会加剧摩擦与损坏。D错在关冷却水与润滑故障无关且会引发过热。"},{"id":287,"type":"single","stem":"内陆渔船在湖泊夜间锚泊时，为让周围船舶判断本船动态，应显示","options":["白光锚灯","红绿舷灯","白光闪光灯","红白旋转灯"],"answer":[0],"explanation":"知识点：锚泊船夜间应显示锚灯。A正确，白光锚灯表明船舶已锚泊不移动。B错在舷灯是航行时显示。C错在闪光灯通常用于操纵能力受限等特殊信号。D错在旋转灯多用于特定作业警示而非锚泊。"},{"id":288,"type":"single","stem":"内陆渔船主机冷却系统采用闭式循环时，膨胀水箱水位持续下降且机舱无外漏，较可能的原因是","options":["缸垫密封失效使冷却液进入气缸","水泵皮带过紧使流量增大","节温器开启过早使水温偏低","散热器风扇转速偏高使蒸发加快"],"answer":[0],"explanation":"知识点：闭式冷却系统水位异常下降且无外漏，多因内漏。A正确，缸垫失效使冷却液进入气缸随排气排出。B错在皮带过紧不会造成持续缺水。C错在节温器早开只影响温度不造成缺水。D错在风扇转速高不会使闭式系统明显缺水。"},{"id":289,"type":"single","stem":"内陆渔船在急流河段掉头时，为减小横倾与失控风险，较合理的操作是","options":["先减速再借水流缓速分段转向","保持高速一次性满舵掉头","加速后紧贴岸边急转","停车让船随流横转再启动"],"answer":[0],"explanation":"知识点：急流掉头应减速并分段利用水流。A正确，降速后舵效可控，分段转向减小横倾。B错在高速满舵易倾覆。C错在贴岸急转易触礁搁浅。D错在停车随流横转丧失舵效。"},{"id":290,"type":"single","stem":"内陆渔船柴油机启动后机油压力正常但水温持续偏高，检查冷却水充足，较可能的原因是","options":["节温器卡在关闭位置","机油黏度过低","喷油提前角过大","蓄电池电压不足"],"answer":[0],"explanation":"知识点：冷却水充足而水温高，多因冷却循环受阻。A正确，节温器卡闭使冷却液不能大循环。B错在机油黏度低影响润滑不影响水温。C错在喷油提前角过大主要引起敲缸与过热但非首选冷却循环判断。D错在电压不足影响启动不影响水温。"},{"id":291,"type":"single","stem":"内陆渔船在船闸内等待闸室充水时，为防止船舶漂移碰撞闸壁，较合适的做法是","options":["系妥缆绳并随水位及时调整缆长","松开所有缆绳让船自由漂浮","主机保持前进推力顶住闸壁","用锚钩钩住闸底固定船位"],"answer":[0],"explanation":"知识点：船闸内应系缆并随水位调整。A正确，及时收放缆绳可保持船位平稳。B错在自由漂浮易碰撞闸壁。C错在顶推闸壁会损坏船体与闸门。D错在闸底通常不允许抛锚且会损坏设施。"},{"id":292,"type":"single","stem":"内陆渔船在航道内与他船对遇且存在碰撞危险，按避碰规则应采取的转向方式是","options":["各自向右转从他船左舷通过","各自向左转从他船右舷通过","加速抢在他船船首通过","停车等他船先通过"],"answer":[0],"explanation":"知识点：对遇局面应各自向右转向。A正确，向右转可形成左舷对左舷安全通过。B错在向左转易形成紧迫局面。C错在加速抢越加剧危险。D错在停车可能仍无法避免碰撞且不符合规则要求。"},{"id":293,"type":"single","stem":"内陆渔船在浅水区航行时发现船体下沉、舵效变差，较合理的处置是","options":["减速并选择深水航道行驶","加速以增加舵效通过浅区","保持航向继续原速航行","急转舵驶向岸边浅滩"],"answer":[0],"explanation":"知识点：浅水效应使船体下沉、舵效变差。A正确，减速可减轻下沉并择深水航道。B错在加速会加剧下沉与吸底。C错在原速继续可能搁浅。D错在驶向浅滩必然搁浅。"},{"id":294,"type":"multi","stem":"内陆渔船在航行中主机突然熄火且无法立即启动，船员应采取的措施包括","options":["立即显示失控信号并加强瞭望","利用余速和舵将船驶离主航道","迅速抛锚固定船位等待救援","立即拆解主机排查故障","加速用余速冲上最近浅滩"],"answer":[0,1,2],"explanation":"知识点：主机失控时应先保证船舶与航道安全。A正确，显示失控信号提醒他船。B正确，利用余速驶离主航道可减少碰撞风险。C正确，抛锚可固定船位等待救援。D错在航行中拆解主机不现实且延误处置。E错在冲上浅滩可能造成搁浅与污染。"},{"id":295,"type":"single","stem":"内陆渔船在狭窄河道顺流下行需要减速时，驾驶操作应先采取的措施是","options":["将主机熄火后利用舵控制方向","将主机挂倒挡并加大油门制动","逐步减小主机油门并适时挂空挡","将舵打满并保持主机转速不变"],"answer":[2],"explanation":"知识点为顺流减速的基本操作。顺流时水流推船，逐步收油并适时空挡可让船速平缓下降，避免突然失去动力或受力突变。A项熄火会失去动力控制，河道内难以应急；B项倒挡大油门会加剧传动冲击且难以保持航向；D项满舵加恒转速不仅不减速，还容易使船横转失控。"},{"id":296,"type":"single","stem":"内陆渔船柴油机运转中机油压力突然降至报警值以下，值班轮机员首先应做的处置是","options":["继续低速运转并观察压力是否回升","立即加大油门提高机油泵转速","停机后先检查机油油位和滤清器","先向油底壳补加柴油稀释机油"],"answer":[2],"explanation":"知识点为机油压力骤降的应急判断。压力骤降可能是油位不足、滤清器堵塞或油路泄漏，应先停机再查油位与滤清器，防止烧瓦。A项继续运转会扩大轴瓦损伤；B项加大油门会提高负荷并加剧缺油磨损；D项向油底壳加柴油会破坏润滑性能，属严重错误做法。"},{"id":297,"type":"single","stem":"内河渔船在能见度不足500米的雾中航行时，按规定应当采取的措施是","options":["保持正常航速并连续鸣放声号","减速航行并按规定鸣放雾号","加速驶向最近岸边停靠","关闭航行灯以减小反光干扰"],"answer":[1],"explanation":"知识点为雾航基本规则。能见度不良时应减速、加强瞭望并按规定鸣放雾号，必要时择地锚泊。A项保持正常航速在雾中极易碰撞；C项加速驶向岸边可能触礁或搁浅；D项关闭航行灯会他船难以发现本船，增加碰撞风险。"},{"id":298,"type":"single","stem":"内陆渔船在湖泊作业时发现船舱进水且进水量不大，船员应优先采用的堵漏方法是","options":["用木楔从船外向内打入破口","用棉被从船内向外塞住破口","用水泥直接涂抹破口外侧","用铁板从船外覆盖后焊死"],"answer":[1],"explanation":"知识点为小船堵漏的常用方法。从船内向外塞棉被等软物可借助水压将堵漏物压紧，操作也较安全。A项从外向内打入木楔在水下难以操作且易被水冲脱；C项水泥在水中未凝固前会被冲走；D项在漂浮船体外侧焊接不现实且危险。"},{"id":299,"type":"single","stem":"内陆渔船在夜间锚泊时，为让过往船舶判断本船状态，应显示的号灯是","options":["仅显示一盏白色环照灯","显示红绿舷灯和尾灯","显示两盏垂直白灯","显示一盏红色环照灯"],"answer":[0],"explanation":"知识点为锚泊号灯。长度较小的渔船锚泊时通常显示一盏白色环照灯即可表明锚泊状态。B项红绿舷灯和尾灯是航行状态号灯；C项两盏垂直白灯通常用于特定作业或操纵受限等情形；D项红色环照灯多用于操纵能力受限等特定显示，不是普通锚泊号灯。"},{"id":300,"type":"multi","stem":"内河渔船在狭窄航道与来船对遇，本船右舷前方有浅滩，按《内河避碰规则》应鸣放会船声号并采取的行动是","options":["鸣放一长声，向右转向从他船左舷会船","鸣放两长声，向左转向从他船右舷会船","鸣放一长一短声，向右转向从他船左舷会船","鸣放两长一短声，向左转向从他船右舷会船"],"answer":[0],"explanation":"知识点：内河渔船对遇局面下的声号与避让方向。正确项：对遇时鸣一长声表示本船向右转向、从他船左舷（左舷对左舷）会船，这是规则规定的标准会船方式。B项错在鸣两长声且向左转向，属于要求对方让路的声号含义，对遇局面不适用；C项错在把一长一短声当作对遇声号，该声号表示本船正在向右转向并准备从他船左舷通过，但规则对遇应鸣一长声而非一长一短；D项错在两长一短声是追越声号，与对遇会船无关。"}]}