{"name":"内河船舶船员适任证书题库","level":"一等 / 二等 / 三等 / 四等 / 五等","org":"海事管理机构","count":300,"questions":[{"id":1,"type":"single","stem":"内河船舶在能见度不良水域航行时，驾驶人员按规则发出声号后，为判断来船动态还应采取的措施是","options":["派人到船首瞭望并减速鸣放声号","保持原速并用望远镜持续观察","关闭航行灯以免暴露船位","靠右岸全速通过该水域"],"answer":[0],"explanation":"能见度不良时瞭望受限，派人到船首瞭望可弥补驾驶台视野盲区，配合减速和鸣放声号符合安全操作要求；保持原速观察无法及时应对突发情况；关闭航行灯会违反避碰要求；靠右岸全速通过可能因浅滩或来船造成危险。","tier":"基础"},{"id":2,"type":"single","stem":"内河船舶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操作是","options":["立即降速并停机检查润滑系统","加大油门维持转速观察压力变化","打开冷却水阀冲洗机油冷却器","向机油中补充柴油稀释油品"],"answer":[0],"explanation":"机油压力骤降说明润滑可能失效，继续运转会烧瓦抱轴，应立即降速停机检查；加大油门会加剧磨损；冲洗冷却器与压力骤降无直接关系；补柴油会破坏润滑性能。","tier":"进阶"},{"id":3,"type":"single","stem":"内河船舶靠泊时，驾驶人员为控制船身与码头的夹角，通常配合使用的操作是","options":["车舵配合并适时使用缆绳","只用舵而不用车","只用倒车不用侧推","靠码头后立即熄火"],"answer":[0],"explanation":"靠泊需要车舵配合控制船速和角度，并用缆绳逐步带紧稳住船身；只用舵难以控制纵向速度；只用倒车不易调整角度；靠码头后立即熄火会失去动力控制，存在碰撞风险。","tier":"基础"},{"id":4,"type":"single","stem":"内河船舶航行中舵机失灵且应急操舵也无效时，驾驶人员应优先采取的措施是","options":["立即减速并选择安全水域抛锚","加速冲向就近码头靠泊","保持航向等待舵机自行恢复","关闭主机让船舶随流漂航"],"answer":[0],"explanation":"舵机完全失效时船舶失去航向控制能力，应减速并择地抛锚避免碰撞；加速冲向码头极易发生事故；等待恢复会延误处置；关闭主机随流漂航会失去控制，风险更大。","tier":"基础"},{"id":5,"type":"single","stem":"内河船舶在狭水道追越前船时，除鸣放追越声号外还必须满足的条件是","options":["征得被追越船同意并留有足够安全横距","前船航速低于本船即可直接追越","只要水深足够即可从任一侧追越","夜间开启探照灯照射前船驾驶台"],"answer":[0],"explanation":"狭水道追越须鸣放声号并取得前船同意，同时保持足够横距防止吸船；仅凭速度差直接追越不符合避碰要求；水深不是唯一条件；用探照灯照射前船会干扰对方瞭望。","tier":"基础"},{"id":6,"type":"single","stem":"内河船舶在汛期航行经过桥区水域时，驾驶人员判断能否安全通过的主要依据是","options":["本船水线以上高度与桥梁净空高度","本船载重吨位与桥梁设计荷载","本船主机功率与桥梁跨度","本船吃水与桥梁墩台宽度"],"answer":[0],"explanation":"桥区通航关键限制是桥梁净空高度与本船水线以上最大高度，汛期水位上涨净空减小更需核算；载重吨位、主机功率、吃水与净空高度不是直接判据。","tier":"基础"},{"id":7,"type":"single","stem":"内河船舶在航行中发生人员落水，驾驶人员最先应采取的操纵措施是","options":["立即向落水侧转舵并停车","立即加速驶离现场","立即抛锚固定船位","立即倒车使船后退"],"answer":[0],"explanation":"人员落水应迅速向落水侧转舵使船艉避开落水者并停车，便于救助；加速驶离会远离落水者；抛锚固定船位不利接近；立即倒车可能使落水者卷入螺旋桨。","tier":"进阶"},{"id":8,"type":"single","stem":"内河船舶在枯水期通过浅滩河段时，为减少搁浅风险，驾驶人员通常采取的措施是","options":["减速并沿深槽缓速通过","加速以缩短浅水区停留时间","靠浅滩一侧全速通过","关闭测深仪凭经验通过"],"answer":[0],"explanation":"枯水期浅滩水深不足，应减速沿深槽缓速通过以便随时调整；加速会增大吃水和下沉量；靠浅滩一侧全速更易搁浅；关闭测深仪失去水深参考。","tier":"基础"},{"id":9,"type":"multi","stem":"内河船舶在航行中发生舵机失灵且应急操舵也无效时，驾驶人员应优先采取的措施有","options":["立即减速并择地抛锚","显示失控信号并警告周围船舶","保持原速继续航行","关闭主机随流漂航"],"answer":[0,1],"explanation":"舵机完全失效应立即减速择地抛锚，并显示失控信号提醒周围船舶；保持原速会加大碰撞风险；关闭主机随流漂航会失去控制能力。","tier":"挑战"},{"id":10,"type":"single","stem":"内河船舶柴油机冷却水温度持续偏高，轮机员检查发现膨胀水箱水位正常但散热器散热片积垢严重，较合理的处置是","options":["清洗散热器并检查冷却水循环","向膨胀水箱补加冷却水","提高主机负荷冲洗水道","打开放水阀放掉部分冷却水"],"answer":[0],"explanation":"散热片积垢会降低散热能力导致水温偏高，应清洗散热器并检查循环是否畅通；水位正常时补水无效；提高负荷会加剧过热；放水会减少冷却水量。","tier":"进阶"},{"id":11,"type":"single","stem":"内河船舶在能见度不良水域航行时，驾驶台应采用的正确做法是","options":["开启航行灯并派人到船首瞭望，同时按规定鸣放声号","开启航行灯并保持全速航行尽快驶离该水域","开启航行灯并关闭雷达避免干扰判断","开启航行灯并在驾驶台内等待他船声号再行动"],"answer":[0],"explanation":"知识点是能见度不良时的航行安全操作。正确项同时做到显示灯光信号、加强瞭望和鸣放声号，符合雾航基本要求。开启航行灯并全速航行会加大碰撞风险，错在盲目求快；关闭雷达会失去重要助航手段，错在放弃有效设备；在驾驶台内等他船声号再行动属于消极等待，错在未主动保持正规瞭望。","tier":"进阶"},{"id":12,"type":"single","stem":"内河船舶靠泊时，关于缆绳使用方法的描述，正确的是","options":["先带首缆再带尾缆，最后带倒缆并逐步收紧","先带倒缆再带首缆，最后带尾缆并一次收紧","首缆尾缆同时带妥后再带倒缆，各缆一次收紧","先带尾缆再带首缆，倒缆最后带但不收紧"],"answer":[0],"explanation":"知识点是靠泊带缆顺序与受力控制。正确项按先首缆稳定船头、再尾缆固定船尾、最后倒缆防止前后移动的顺序，并逐步收紧，符合带缆操作规范。先带倒缆再带首缆会使船头先受横向力，错在顺序颠倒；首尾缆同时带妥再带倒缆缺少逐步稳定过程，错在未分步控制；先带尾缆再带首缆且倒缆不收紧会使船体前后移动，错在未发挥倒缆作用。","tier":"基础"},{"id":13,"type":"single","stem":"内河船舶柴油主机运转中，发现排烟温度突然升高且排烟呈黑色，最可能的原因是","options":["喷油器雾化不良或喷油量过大导致燃烧不完全","冷却水温过低导致气缸壁散热过快","滑油压力过高导致润滑过量进入气缸","进气温度过低导致空气密度增大"],"answer":[0],"explanation":"知识点是柴油机排烟异常与燃烧状态判断。正确项喷油器雾化不良或喷油量过大会造成燃油与空气混合不均、燃烧不完全，从而排烟变黑且排温升高。冷却水温过低会改善散热但不会使排烟变黑，错在因果不符；滑油压力过高不会直接导致大量滑油进缸，错在机理错误；进气温度过低使空气密度增大反而有利于燃烧，错在方向相反。","tier":"挑战"},{"id":14,"type":"single","stem":"内河船舶在弯曲河段下行时，为减小扫弯水对船位的影响，正确的操作是","options":["适当加大航速并靠弯道外侧行驶以获取更大回转空间","适当降低航速并靠弯道内侧行驶以缩短航程","保持全速并沿河道中心线行驶以避开两岸水流","降低航速并停车让船随水流自然漂过弯道"],"answer":[0],"explanation":"知识点是弯曲河段水流特性与操船方法。正确项适当加大航速并靠外侧行驶可利用较大回转空间抵消扫弯水的不利影响。降低航速靠内侧会因扫弯水推压更易触岸，错在位置选择相反；全速沿中心线行驶不能避开外侧强流，错在未针对扫弯水调整；停车随流漂过弯道会完全丧失控制，错在放弃主动操纵。","tier":"进阶"},{"id":15,"type":"single","stem":"内河船舶消防中，机舱油类火灾初期使用手提式灭火器时，正确的喷射方法是","options":["对准火焰根部由近及远左右扫射，并保持安全距离","对准火焰中部由远及近上下扫射，并尽量靠近火源","对准火焰顶部快速喷射，待火势减弱后停止","对准火源上方喷射形成覆盖层，再逐步下移"],"answer":[0],"explanation":"知识点是油类火灾初期灭火操作。正确项对准火焰根部由近及远左右扫射能有效切断燃烧链，保持安全距离可避免复燃伤人。对准火焰中部由远及近且尽量靠近会因高温和油品飞溅造成危险，错在位置和距离不当；对准火焰顶部喷射不能触及燃烧源，错在目标错误；对准火源上方形成覆盖层适用于某些气体火灾，对油类火灾初期效果差，错在方法不匹配。","tier":"进阶"},{"id":16,"type":"single","stem":"内河船舶航行中，发现舵角指示器读数与实际舵叶偏转方向相反，正确的处置是","options":["立即减速并使用应急舵操舵，同时通知机舱检查舵机传动机构","继续按原舵角指示器读数操舵，待靠泊后再检查","立即加速用车舵配合修正航向，并派人到舵机舱观察","停用应急舵，改用手动操舵并保持原航向航行"],"answer":[0],"explanation":"知识点是舵角指示异常时的应急判断。正确项立即减速、改用应急舵并通知机舱检查，可防止因指示错误导致操舵失误。继续按错误读数操舵会加剧航向偏差，错在未识别故障；加速并用车舵配合修正会使局面更复杂，错在措施不当；停用应急舵改手动操舵不能解决指示相反问题，错在未针对故障源。","tier":"挑战"},{"id":17,"type":"single","stem":"内河船舶在锚地抛锚时，判断锚已抓牢底质的正确依据是","options":["锚链由紧变松并伴有船体轻微回摆，锚链与水面夹角趋于稳定","锚链持续保持紧绷且船体不再移动，锚链与水面夹角不断增大","锚链完全松弛沉入水底，船体随水流缓慢漂移","锚链间断出现抖动且船体持续偏转，锚链与水面夹角不断变化"],"answer":[0],"explanation":"知识点是抛锚后锚抓底状态的判断。正确项锚链由紧变松并伴有船体轻微回摆、锚链与水面夹角稳定，说明锚已抓牢且船体受力平衡。锚链持续紧绷且夹角不断增大说明锚仍在拖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操舵问题。","tier":"进阶"},{"id":73,"type":"single","stem":"内河船舶舵机从一舷满舵转至另一舷满舵的试验中，舵叶实际到达规定舵角的时间超过说明书要求，首先应检查的项目是","options":["舵机液压油温度是否偏低","舵机液压系统是否存在内漏","驾驶台舵角指示器是否归零","应急舵电源是否处于断开位"],"answer":[1],"explanation":"知识点为舵机转舵时间超标的常见原因。液压系统内漏会使有效流量下降、转舵变慢；油温偏低通常只影响短时黏度，舵角指示器归零与转舵速度无关，应急舵电源断开则表现为完全不能转舵而非变慢。","tier":"进阶"},{"id":74,"type":"single","stem":"内河船舶主机运行中滑油压力突然下降并伴油温升高，轮机员首先应采取的措施是","options":["立即加大冷却水量降低油温","迅速降速并检查滑油系统","直接切换备用滑油泵继续航行","向油底壳补加新滑油提高油位"],"answer":[1],"explanation":"知识点为主机滑油压力异常处置。压力下降伴油温升高提示润滑系统可能泄漏、泵故障或轴瓦异常，应先降速检查；加大冷却水不能解决压力下降，盲目切换备用泵可能掩盖故障，补加新油不解决泄漏或泵损。","tier":"挑战"},{"id":75,"type":"single","stem":"内河船舶在弯曲河段下行时，为减小船舶向凹岸一侧的偏移，通常应把船位摆在","options":["凹岸一侧主流带","凸岸一侧缓流带","河心主流正中","凹岸水沫线附近"],"answer":[1],"explanation":"知识点为弯曲河段操船。下行船一般利用凸岸缓流带以减少扫弯和偏移；凹岸主流带流速大易压向凹岸，河心主流正中也受弯道环流影响，凹岸水沫线附近更危险。","tier":"基础"},{"id":76,"type":"single","stem":"内河船舶在浅水区航行时出现舵效变差、船体下沉，主要是因为","options":["船底与河床间水流加速使压力降低","船首波增高使船舶被抬起","螺旋桨滑失比减小推力增大","舵叶进水角度因水深减小而增大"],"answer":[0],"explanation":"知识点为浅水效应。浅水区船底与河床间流速增大、压力降低，产生下沉和舵效变差；船首波增高不是抬船原因，滑失比通常增大而非减小，舵叶进水角度不由水深直接决定。","tier":"基础"},{"id":77,"type":"single","stem":"内河船舶厨房使用液化气灶时，发现连接软管有轻微老化裂纹，正确的处置是","options":["用防水胶带缠绕裂纹后继续使用","关闭钢瓶角阀并更换软管","把软管裂纹段剪掉后重新套上","调小灶前减压阀压力继续使用"],"answer":[1],"explanation":"知识点为船舶厨房液化气安全管理。软管老化裂纹必须关闭角阀并更换整根软管；胶带缠绕、剪掉裂纹段再接、调小减压阀都不能消除泄漏隐患。","tier":"挑战"},{"id":78,"type":"single","stem":"内河船舶在靠泊过程中，码头横风较强，船长决定采用拖轮协助，拖轮顶推的正确着力点应选在","options":["船首外舷便于顶开船头","船中偏后位置顶推船体","船尾正后方顶推船尾","码头一侧船首内舷"],"answer":[1],"explanation":"知识点为靠泊时拖轮协助操作。顶推船中偏后位置可有效控制船体横向移动和回转；船首外舷顶推易使船尾甩向码头，船尾正后方顶推不利于控制靠拢角度，内舷船首位置无法有效发力。","tier":"进阶"},{"id":79,"type":"single","stem":"内河船舶发电机并联运行中，一台机组突然跳闸，值班轮机员首先应确认","options":["跳闸机组的原动机转速是否为零","母排电压和频率是否稳定","跳闸机组的滑油温度是否过高","电网负载是否已全部切除"],"answer":[1],"explanation":"知识点为发电机并联运行故障处置。一台机组跳闸后，首要确认母排电压和频率是否稳定，防止全船失电；转速为零不是首要确认项，滑油温度是后续检查内容，负载通常不会全部切除。","tier":"挑战"},{"id":80,"type":"single","stem":"内河船舶在航行中舵机失灵，船长决定抛锚制动，抛锚时应选择","options":["船首正横方向抛出主锚","船首偏外舷方向抛出主锚","船尾正后方抛出尾锚","任意一舷抛出备用锚"],"answer":[1],"explanation":"知识点为舵机失灵应急抛锚。应选择船首偏外舷方向抛出主锚，利用锚链与船体形成制动力矩；正横抛锚易导致锚链横拉、断链或船体横转，抛尾锚不能有效制动船首，备用锚一般不作为首选。","tier":"基础"},{"id":81,"type":"single","stem":"内河船舶在汛期航行，发现前方航标移位、漂失，正确的做法是","options":["按原航标位置继续沿习惯航路航行","减速并按测深和岸形谨慎通过","加速抢在标志漂走前通过该段","靠向漂失航标一侧寻找航槽"],"answer":[1],"explanation":"知识点为汛期航标异常处置。航标移位或漂失后应减速，依靠测深、岸形和正规瞭望谨慎通过；按原位置航行可能偏航，加速通过风险更大，靠近漂失航标一侧可能进入浅区或障碍区。","tier":"挑战"},{"id":82,"type":"single","stem":"内河船舶机舱发生火灾，使用固定式二氧化碳灭火系统前，必须确认","options":["机舱内人员已全部撤离并封闭开口","主机已完全停止运转并切断电源","二氧化碳钢瓶压力高于额定值","机舱通风机已切换为高速运转"],"answer":[0],"explanation":"知识点为固定式二氧化碳灭火系统施放条件。施放前必须确认人员全部撤离并封闭机舱开口，防止窒息事故；主机停止和切断电源是辅助措施，钢瓶压力过高不是确认条件，通风机高速运转会破坏灭火效果。","tier":"挑战"},{"id":83,"type":"multi","stem":"内河船舶在雾中航行时，下列哪些措施符合安全操作要求","options":["开启雷达并安排专人瞭望","按规定鸣放雾号并减速","利用GPS船位保持原速航行","必要时选择安全水域锚泊","关闭航行灯以观察他船灯光"],"answer":[0,1,3],"explanation":"知识点为雾航安全操作。开启雷达并专人瞭望、鸣放雾号减速、必要时选择安全水域锚泊均符合要求；利用GPS船位保持原速不能替代瞭望和减速，关闭航行灯会削弱他船对本船的判断。","tier":"进阶"},{"id":84,"type":"single","stem":"内河船舶在能见度不良水域航行时，驾驶台应采取的鸣放声号方式是","options":["每隔不超过1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2分钟鸣放一长一短声"],"answer":[0],"explanation":"知识点为内河能见度不良时的声号规定。能见度不良时航行中船舶应每隔不超过1分钟鸣放一长声，以警示他船；一长两短声是操纵和警告声号中的掉头声号；两长声并非能见度不良航行声号；一长一短声是追越声号中的同意追越。","tier":"进阶"},{"id":85,"type":"single","stem":"内河船舶靠泊时，驾驶员在船首指挥，发现船首与码头间横距偏大且船舶仍有前进余速，正确处置是","options":["立即抛下船首锚制动","通知机舱加车顶住码头","令船首撇缆人员强行拉拢","待船首靠拢后再带首缆"],"answer":[0],"explanation":"知识点为靠泊余速与横距控制。横距偏大又有余速时抛下船首锚可有效制动并控制船首靠拢；加车顶码头会加剧碰撞；强行拉拢撇缆易伤人或断缆；待靠拢再带缆已失去控制时机，可能撞击码头。","tier":"挑战"},{"id":86,"type":"single","stem":"内河船舶航行中舵机失灵，应急操舵应优先采用的方式是","options":["使用舵机间应急操舵装置","切换另一台舵机液压泵","改用主机差速转向","通知机舱停车漂航"],"answer":[0],"explanation":"知识点为舵机失灵应急操舵程序。舵机失灵后应优先使用舵机间应急操舵装置直接控制舵叶；切换液压泵属于故障排查，不一定立即有效；主机差速转向是辅助手段；停车漂航会失去控制，不是首选。","tier":"基础"},{"id":87,"type":"single","stem":"内河船舶在狭水道追越前船时，追越船鸣放的声号应为","options":["两长一短声","两长两短声","一长一短声","一长两短声"],"answer":[1],"explanation":"知识点为内河追越声号。追越船要求追越时鸣放两长两短声；被追越船同意时鸣放一长一短声；一长两短声是掉头声号；两长一短声不是标准追越声号。","tier":"基础"},{"id":88,"type":"single","stem":"内河船舶锚泊时，值班驾驶员发现锚链突然受力绷紧并伴有船首偏转，正确处置是","options":["立即松出锚链缓解受力","立即绞起锚链重新抛锚","通知机舱备车并报告船长","加大锚链制动力防止走锚"],"answer":[2],"explanation":"知识点为锚泊异常判断与处置。锚链突然绷紧偏转可能是走锚或风流突变，应备车报告船长做好应急准备；盲目松链可能加剧走锚；立即绞链重新抛锚时机不当；加大制动力可能拉断锚链。","tier":"挑战"},{"id":89,"type":"single","stem":"内河船舶轮机部在更换主机滑油滤器时，正确的操作顺序是","options":["先关闭进出口阀再拆滤器","先拆滤器再关闭进出口阀","先启动备用泵再拆滤器","先泄放系统压力再关闭进出口阀"],"answer":[3],"explanation":"知识点为滑油滤器更换安全操作。正确顺序是先泄放系统压力，再关闭进出口阀，然后拆装；先关阀后泄压管内仍有余压；先拆滤器会喷油；启动备用泵会使系统带压更危险。","tier":"基础"},{"id":90,"type":"single","stem":"内河船舶在夜间航行时，发现前方来船显示红、绿两盏舷灯及一盏白灯，说明该船","options":["正对驶而来","从左舷横越","从右舷横越","同向行驶"],"answer":[0],"explanation":"知识点为号灯识别。同时看到红绿舷灯和白灯，说明来船船首正对本船，即正对驶；只看到一盏舷灯为横越；只看到白灯为同向或锚泊。","tier":"进阶"},{"id":91,"type":"single","stem":"内河船舶在枯水期通过浅滩时，为判断能否安全通过，驾驶员应重点参考","options":["当地水位站当日水位与航道维护水深","船舶满载吃水与主机功率","前一航次通过时的航速","船首瞭望人员的手势信号"],"answer":[0],"explanation":"知识点为浅滩通过条件判断。枯水期过浅滩应以当日水位和航道维护水深为依据，结合本船吃水留足富余水深；主机功率、旧航速、手势信号都不能替代水深判断。","tier":"进阶"},{"id":92,"type":"multi","stem":"内河船舶航行中发现机舱火警报警，轮机员确认起火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常时的处置。舵角指示与实际不符说明舵机或传动系统异常，应减速并检查，正确项符合安全操作；继续航行到下一港会扩大风险；立即停车抛锚可能影响航道安全且未必必要；加速航行更危险。"},{"id":110,"type":"single","stem":"内河船舶在夜间航行时发现前方有他船显示红光和绿光，且两灯距离逐渐增大，说明他船","options":["正从本船前方横向穿越","正背离本船行驶","与本船同向行驶","处于锚泊状态"],"answer":[1],"explanation":"知识点为号灯判断他船动态。同时看到红绿光说明他船船首朝向本船方向，两灯距离增大说明他船正在转向或背离，正确项符合号灯动态判断；横向穿越时两灯间距变化不同；同向行驶通常只见尾灯；锚泊船显示锚灯。"},{"id":111,"type":"single","stem":"内河船舶在通过桥区水域时，发现桥孔水流紊乱且本船航向难以保持，正确的处置是","options":["减速并适当调整航向对准桥孔中心","加速抢在横流到来前通过桥孔","原地停车等待水流平稳后再通过","向桥墩一侧靠拢利用桥墩回流"],"answer":[0],"explanation":"知识点为桥区水域操纵。水流紊乱时应减速并调整航向对准桥孔中心通过，正确项符合桥区航行要求；加速会增大失控风险；原地停车可能被水流推压；靠拢桥墩会带来碰撞危险。"},{"id":112,"type":"multi","stem":"内河船舶在航行中发生主机突然停机，轮机人员应进行的处置包括","options":["立即报告驾驶台并显示失控信号","检查主机燃油与滑油系统是否正常","尝试按应急程序启动主机","直接打开主机示功阀盘车检查","通知机舱人员准备弃船"],"answer":[0,1,2],"explanation":"知识点为主机失控应急程序。正确项包括报告驾驶台、检查油滑系统、按应急程序尝试启动，符合应急要求；直接打开示功阀盘车检查属于检修步骤，不应在航行应急中首先进行；准备弃船为时过早且不符合处置顺序。"},{"id":113,"type":"single","stem":"内河船舶主机在正常运转中滑油压力突然下降并伴有报警，值班轮机员首先应做的操作是","options":["立即加大冷却水量降低滑油温度","迅速降速并停车检查滑油系统","切换备用滑油泵后维持原转速观察","向滑油系统补加滑油至正常油位"],"answer":[1],"explanation":"知识点：滑油压力异常时的应急处理。滑油压力骤降意味着润滑可能失效，继续运转会烧瓦，故应降速停车检查。加大冷却水不解决压力问题；切换备用泵后维持原转速可能在故障未查清时扩大损坏；盲目补油掩盖了泄漏或泵故障的真正原因。"},{"id":114,"type":"single","stem":"内河船舶靠离码头时，驾驶人员使用车舵配合，下列说法正确的是","options":["靠泊时以进车为主舵效不足再加油门","离泊时先解缆再动车以防缆绳绷断","靠泊时控制余速以微速进车配合舵角调整","靠泊时满舵大角度进车以便快速贴靠"],"answer":[2],"explanation":"知识点：靠离泊车舵配合要领。靠泊应控制余速、微速进车配合小舵角逐步调整，才能平稳贴靠。靠泊以进车为主加油门会增速难以控制；离泊先解缆再动车易造成船位失控或缆绳伤人；满舵大角度进车贴靠会撞击码头。"},{"id":115,"type":"single","stem":"内河船舶消防中，机舱发生油类火灾时，下列灭火措施正确的是","options":["用直流水柱冲击油面快速降温","用泡沫覆盖油面隔绝空气灭火","用二氧化碳对着火焰上部喷射","用水雾稀释油品降低其浓度"],"answer":[1],"explanation":"知识点：油类火灾的灭火方法。泡沫能在油面形成覆盖层隔绝空气，是油火的有效手段。直流水柱会飞溅油品扩大火势；二氧化碳应喷向火焰根部而非上部；水雾不能稀释油品，油浮于水反而随水流扩散。"},{"id":116,"type":"single","stem":"内河船舶在狭窄弯曲河段下行时，驾驶人员对船位的控制，下列做法正确的是","options":["尽量沿河道中心线行驶以保持航向稳定","提前靠弯道凸岸一侧以利用缓流","根据水流和弯道提前摆好船位走凹岸一侧","在弯道内临时加车抢过弯顶以防落弯"],"answer":[2],"explanation":"知识点：弯曲河段操船。凹岸主流深、缓流靠凸岸，下行船应提前摆好船位走凹岸一侧以利用主流并防止被推向凸岸。沿中心线行驶易受扫弯水影响；靠凸岸会进入浅水缓流区易搁浅；弯道内加车抢弯易失控。"},{"id":117,"type":"single","stem":"内河船舶柴油机启动后，发现排气管冒大量黑烟且转速不稳，最可能的原因是","options":["喷油量过多导致燃烧不完全","冷却水温过低使燃烧恶化","滑油压力偏高造成窜油","进气温度过高使空气密度下降"],"answer":[0],"explanation":"知识点：柴油机黑烟与燃烧故障判断。黑烟通常是燃油燃烧不完全，喷油量过多、雾化不良是常见原因。冷却水温过低主要影响经济性和磨损，一般不直接造成大量黑烟；滑油压力偏高不会窜入燃烧室；进气温度过高会降低空气密度，但排烟多为灰白而非浓黑。"},{"id":118,"type":"single","stem":"内河船舶在航行中舵机失灵，驾驶人员应采取的应急措施是","options":["立即停车并抛锚固定船位","改用应急舵并显示失控信号","加大车速用车效代替舵效","通知机舱后继续按原航线航行"],"answer":[1],"explanation":"知识点：舵机失灵应急。应立即改用应急舵操纵，并按规定显示失控信号警告他船。立即抛锚可能造成搁浅或损坏锚设备；加大车速不能替代舵效反而增加危险；仅通知机舱继续航行会丧失避让能力。"},{"id":119,"type":"single","stem":"内河船舶锚泊时，夜间应显示的号灯是","options":["仅显示白光锚灯一盏","显示锚灯并视情况显示甲板工作灯","显示红绿舷灯和尾灯","显示白、红、绿三盏环照灯"],"answer":[0],"explanation":"知识点：锚泊号灯显示。锚泊船舶夜间应显示白光锚灯，以表明船舶锚泊状态。显示甲板工作灯不是锚泊号灯要求；红绿舷灯和尾灯是航行号灯；白红绿三盏环照灯不是锚泊船的规定号灯组合。"},{"id":120,"type":"single","stem":"内河船舶在洪水期通过桥区水域时，驾驶人员对水流的判断，下列做法正确的是","options":["桥墩附近水流平缓可直接从墩边通过","提前对准桥孔并注意桥墩绕流的影响","从上游侧桥孔通过以避开下游漩涡","在桥区加速通过减少水流影响时间"],"answer":[1],"explanation":"知识点：桥区水域操船。洪水期桥墩附近有绕流和漩涡，应提前对准桥孔、注意绕流影响并保持船位。墩边水流紊乱不可贴靠通过；上游侧桥孔同样存在绕流并非安全选择；桥区加速会降低操纵余量。"},{"id":121,"type":"single","stem":"内河船舶轮机部在值班中，发现主机冷却水温度持续升高，下列处置正确的是","options":["立即停车并拆检冷却系统","先检查冷却水泵和管路再决定是否降速","加大负荷以加快冷却水循环","关闭冷却水出口阀提高系统压力"],"answer":[1],"explanation":"知识点：冷却水温度异常处置。应先检查冷却水泵、管路、滤器和水量是否正常，再根据情况降速，避免盲目停车或拆检。立即停车拆检会中断航行且未必找到原因；加大负荷使温度更高；关闭出口阀会憋压损坏系统。"},{"id":122,"type":"single","stem":"内河船舶在能见度小于500米时航行，驾驶人员对航速的控制应","options":["保持原速并加强瞭望以按时到港","降至能随时停住的安全航速","以半速航行并开启全部号灯","按最低稳定转速航行并派专人瞭望"],"answer":[1],"explanation":"知识点：能见度不良时的安全航速。规则要求降至能随时停住的安全航速，具体转速视船舶性能和水域而定。保持原速违反安全航速要求；半速未必能随时停住；最低稳定转速可能导致舵效不足，应综合判断而非一概而论。"},{"id":123,"type":"single","stem":"内河船舶在能见度不良水域航行时，驾驶台应保持的视觉瞭望安排是","options":["指派一名船员在船首协助瞭望并保持与驾驶台联系","由驾驶员独自在驾驶台兼顾操舵与瞭望","开启雷达后即可免除目视瞭望安排","在驾驶台两侧各安排一人负责瞭望"],"answer":[1],"explanation":"知识点为能见度不良时的正规瞭望要求。能见度不良时应加强瞭望，通常在船首增派瞭望人员并保持通信联系；由驾驶员独自兼顾操舵与瞭望会削弱瞭望效果；仅靠雷达不能替代视觉瞭望；驾驶台两侧各安排一人不符合内河船舶实际配员与瞭望习惯。"},{"id":124,"type":"single","stem":"内河船舶在狭水道追越前船时，除鸣放声号外还应确认的关键条件是","options":["前船已同意让路且留有足够安全横距","本船车速已提高至全速前进","前船已鸣放一长声表示同意","本船已取得航道部门许可"],"answer":[0],"explanation":"知识点为狭水道追越的同意与安全条件。追越必须取得前船同意并保持足够横距；提高至全速前进不是追越前提且可能增加危险；一长声并非追越同意的规定声号；追越不需要航道部门个案许可。"},{"id":125,"type":"single","stem":"内河船舶柴油机运转中机油压力突然降至低于最低允许值，值班轮机员首先应","options":["换用备用机油泵并继续观察压力变化","立即降速并停车检查润滑系统","加大冷却水量以降低机油温度","记录压力数值待下次靠泊再处理"],"answer":[1],"explanation":"知识点为柴油机润滑系统故障应急处置。机油压力突降说明润滑可能失效，应立即降速停车检查，防止烧瓦等事故；换泵继续观察会延误时机；加大冷却水不解决润滑问题；延后处理会扩大机损。"},{"id":126,"type":"single","stem":"内河船舶靠泊时，若发现泊位前方有他船系泊缆横越航道，正确的处置是","options":["减速并鸣笛警告后强行通过","停车待缆绳收起或改靠其他泊位","加速从缆绳下方通过","保持航向并通知对方解缆"],"answer":[1],"explanation":"知识点为靠泊前对碍航物的判断与处置。横越航道的系泊缆会危及本船螺旋桨和舵，应停车等待或改靠；强行通过、加速通过都可能绞缆；仅通知对方解缆而不减速仍存在紧迫危险。"},{"id":127,"type":"single","stem":"内河船舶主机遥控系统在航行中发出故障报警，轮机员检查发现可切换至机旁操纵，正确做法是","options":["立即停车并申请拖轮","切换机旁操纵并通知驾驶台","继续使用遥控系统观察","关闭报警后维持原状"],"answer":[1],"explanation":"知识点为主机遥控系统故障处置。遥控故障时可切至机旁操纵维持船舶控制，并及时通知驾驶台配合；立即停车申请拖轮并非首选；继续使用故障系统或关闭报警维持原状都会留下隐患。"},{"id":128,"type":"single","stem":"内河船舶在航行中发生舵机液压油管破裂，轮机员首先应","options":["关闭破裂管路两端阀门并切换备用系统","用布条缠绕破裂处继续供油","向系统内补充液压油维持压力","拆下破裂油管后直接启动舵机"],"answer":[0],"explanation":"知识点为舵机液压系统泄漏应急。应隔离破损管段并切换备用系统；缠绕布条不能承受压力且可能喷油伤人；只补油无法维持压力；拆管后直接启动会大量漏油并失去舵效。"},{"id":129,"type":"single","stem":"内河船舶在航行中有人落水，驾驶台首先应采取的操纵措施是","options":["立即停车并向落水者一侧满舵","向落水者一侧操舵并抛出救生圈","加速驶离后从下游折返","保持航向并通知机舱减速"],"answer":[1],"explanation":"知识点为落水应急操纵。应迅速向落水者一侧操舵并抛出救生圈，便于接近救援；立即停车满舵可能使落水者卷入船尾；加速驶离会远离落水者；保持航向延误救援。"},{"id":130,"type":"single","stem":"内河船舶在港内加油作业时，为防止油污染，值班船员应重点检查","options":["加油管系接头和甲板排水孔封堵情况","加油船船员是否穿戴救生衣","本船主机转速是否稳定","加油作业期间是否开启雷达"],"answer":[0],"explanation":"知识点为加油作业防污染措施。重点是管系接头渗漏和甲板排水孔封堵，防止油类入水；救生衣、主机转速、雷达与防污染无直接关系。"},{"id":131,"type":"single","stem":"内河船舶在通过桥区水域时，驾驶台应提前核对的重要信息是","options":["桥孔净空高度和本船水线以上最大高度","桥梁设计单位名称和竣工年份","桥区两岸码头泊位数量","桥上交通信号灯的颜色顺序"],"answer":[0],"explanation":"知识点为桥区通航净空核对。通过桥区必须核对桥孔净空高度与本船水线以上最大高度，确保安全通过；桥梁设计单位、竣工年份、码头数量、信号灯颜色顺序与通过安全无直接关系。"},{"id":132,"type":"single","stem":"内河船舶在能见度不良水域航行时，驾驶人员按规则采取的最核心行动是","options":["开启航行灯并保持原速航行以按时到港","鸣放声号并采取安全航速，必要时择地锚泊","仅开启雷达即可维持正常航速","通知机舱备车后仍按常规航速行驶"],"answer":[1],"explanation":"知识点：能见度不良时的航行安全措施。能见度不良时无法保持正规瞭望，核心是控制速度并发出声号，必要时锚泊以消除碰撞风险，故B正确；A保持原速无法应对突发情况；C雷达不能代替视觉瞭望，维持正常航速风险极高；D备车只是准备，不改变航速仍不足以避险。"},{"id":133,"type":"single","stem":"内河船舶在航行中发现主机冷却水温度持续升高且膨胀水箱水位下降，轮机人员首先应做的检查是","options":["立即加大冷却水泵转速提高循环量","检查冷却系统外管路及接头有无泄漏","向膨胀水箱补水后继续观察温度变化","降低主机负荷并打开缸套放气阀排气"],"answer":[1],"explanation":"知识点：冷却水温度异常与水位下降并存的故障判断。水位下降伴随温度升高，首要怀疑系统泄漏，应先查外管路和接头，故B正确；A在泄漏未排除时加大循环量无助于查明原因；C只补水不查漏会掩盖故障；D降负荷排气适用于气阻，不针对水位下降这一泄漏征兆。"},{"id":134,"type":"single","stem":"内河船舶靠泊过程中，驾驶人员使用倒车制动时，正确的操作顺序是","options":["先倒车后停车，待船身横移后再调整船位","先停车再倒车，船首向稳定后微速倒车","直接全速倒车，利用水流冲击抵消前进惯性","保持进车同时打满舵，用舵力使船尾靠拢"],"answer":[1],"explanation":"知识点：靠泊倒车制动的操作程序。应先停车消减惯性，再以微速倒车控制，避免倒车过猛导致船首偏转，故B正确；A先倒车再停车会使船身失稳；C全速倒车易造成船首剧烈偏转甚至碰撞；D进车打满舵是旋回操作，不能用于制动靠泊。"},{"id":135,"type":"single","stem":"内河船舶在狭窄弯曲河段下行时，为预防落弯扫尾事故，驾驶人员应重点控制的是","options":["尽量贴凸岸行驶以缩短航程","在弯道前减速并靠凹岸一侧通过","保持航速并沿弯道外缘大半径转向","在弯顶处加速以尽快通过弯曲段"],"answer":[1],"explanation":"知识点：弯曲河段下行防落弯扫尾的操纵要领。弯道水流扫向凹岸，应减速并靠凹岸通过以利用主流，故B正确；A贴凸岸易受回流和浅滩影响；C沿外缘大半径转向会扫向凸岸一侧的障碍物；D弯顶加速会加大离心偏转，增加扫尾风险。"},{"id":136,"type":"single","stem":"内河船舶在航行中舵机突然失灵，驾驶人员首先应采取的应急措施是","options":["立即停车并显示失控信号，同时通知机舱","改用应急舵并继续按原航向前进","加大主机转速用车让船保持航向","抛下双锚紧急制动使船停住"],"answer":[0],"explanation":"知识点：舵机失灵应急程序。舵机失灵后应立即停车、显示失控信号并通知机舱，控制船舶状态，故A正确；B应急舵切换需在确认可用后逐步进行，直接继续前进风险大；C用车速无法代替舵效控制航向；D抛双锚在航速较高时易导致锚链断裂。"},{"id":137,"type":"single","stem":"内河船舶在夜间航行时，发现前方来船显示两盏桅灯和两盏舷灯，说明该船","options":["是一艘长度较大的机动船正对驶来","是一艘从事拖带作业的船队","是一艘锚泊中的船舶","是一艘失去控制的船舶"],"answer":[0],"explanation":"知识点：号灯识别。显示两盏桅灯表明船长较大或功率较大，加两盏舷灯说明是机动船且正对或近似正对驶来，故A正确；B拖带船队显示拖带号灯，与两桅灯不同；C锚泊船显示锚灯；D失控船显示两盏红环照灯，非桅灯舷灯组合。"},{"id":138,"type":"single","stem":"内河船舶在进行舷外排油作业时，发现油污水分离器出水含油量异常升高，正确的处置是","options":["停止排放，检查分离器并取样化验","继续排放但降低排放速率","将出水改排至压载舱暂存","提高分离器加热温度后继续排放"],"answer":[0],"explanation":"知识点：油污水处理装置异常处置。出水含油量异常说明分离器失效，应立即停止排放并检查，故A正确；B降低速率不能改变超标事实；C改排压载舱只是转移污染，仍属违规；D加热不能解决分离失效问题。"},{"id":139,"type":"single","stem":"内河船舶在主机启动前进行盘车检查的主要目的是","options":["确认各缸润滑和运动部件无卡阻","检查启动空气瓶压力是否充足","核对燃油日用柜油位是否正常","试验遥控操纵系统动作是否灵敏"],"answer":[0],"explanation":"知识点：主机启动前盘车的目的。盘车可检查运动部件有无卡阻并建立油膜，故A正确；B空气瓶压力由压力表检查；C油位由液位计查看；D操纵系统试验属另一项检查内容，与盘车目的不同。"},{"id":140,"type":"single","stem":"内河船舶航行中船员发现有人落水，驾驶人员立即采取的正确行动是","options":["立即停车并向落水者一侧转舵，同时抛救生圈","保持航向加速驶离以便调头返回","先鸣放声号再慢慢倒车寻找落水者","通知机舱备车后按原航向继续行驶"],"answer":[0],"explanation":"知识点：落水人员应急救助程序。应立即停车、向落水者一侧转舵并抛救生圈，使船体避开落水者，故A正确；B加速驶离会延误救助；C先鸣号再倒车会延误时机且倒车易伤及落水者；D继续行驶完全背离救助要求。"},{"id":141,"type":"single","stem":"内河船舶在通过桥区水域时，驾驶人员应重点核对的是","options":["桥孔的通航净空高度和通航孔位置","桥梁的设计荷载等级和建造年份","桥区上下游的码头泊位数量","桥梁管理单位的联系电话"],"answer":[0],"explanation":"知识点：桥区通航安全要点。通过桥区需核对通航孔位置与净空高度以确认本船能否安全通过，故A正确；B设计荷载与船舶通过无关；C码头数量不影响桥孔选择；D联系电话属辅助信息，不是通过桥区时核对的核心内容。"},{"id":142,"type":"single","stem":"内河船舶在港内进行加油作业时，为防止溢油，正确的做法是","options":["加油前堵好甲板排水孔并安排专人监视油位","加油时打开甲板排水阀以便及时排出溢油","加油过程中关闭油舱透气孔防止油气外泄","加油完毕后再检查油舱液位是否达到要求"],"answer":[0],"explanation":"知识点：加油防溢油措施。加油前应堵好甲板排水孔、安排专人监视油位，故A正确；B打开排水阀会使溢油直接入水；C关闭透气孔会造成油舱超压或加油困难；D加油后再查液位属于事后检查，不能防止溢油。"},{"id":143,"type":"multi","stem":"内河船舶在锚泊期间遇到走锚险情，值班船员应当采取的措施包括","options":["立即报告驾驶台并备车","松出锚链增加锚抓力","显示锚泊信号并加强瞭望","观察岸上物标判断船舶是否移动","立即起锚另择锚地重新抛锚"],"answer":[0,1,3],"explanation":"知识点：走锚险情的判断与处置。发现走锚应立即报告并备车、松链增加抓力、用物标核对船位判断移动，故A、B、D正确；C显示锚泊信号是锚泊常规做法，不能处置走锚；E立即起锚在走锚初期并非首选，应先稳控船位再决定是否重新抛锚，直接起锚可能使船舶失控。"},{"id":144,"type":"single","stem":"内河船舶舵机在航行中突然失灵，驾驶台首先应采取的措施是","options":["立即停车并显示失控信号","立即倒车使船停住","立即抛下首锚制动","立即转用应急舵继续航行"],"answer":[0],"explanation":"知识点为失控应急程序。舵机失灵应立即停车、显示失控号型或声号，控制船速后按需抛锚，避免盲目倒车或抛锚造成横倾或断链。倒车会加剧偏转，先抛锚可能损坏锚机，直接转应急舵需先确认舵机失效原因并减速。"},{"id":145,"type":"single","stem":"内河船舶航行中主机滑油压力突然下降并报警，值班轮机员正确的第一步处置是","options":["立即降速并检查滑油泵和滤器","立即停车等待压力恢复","立即补充滑油至正常油位","立即切换备用滑油泵并继续全速航行"],"answer":[0],"explanation":"知识点为主机滑油低压应急处置。应先降速减小负荷，同时检查滑油泵、滤器及油位等可能原因；直接停车可能造成船舶失控，只补油不查因会掩盖故障，切泵后继续全速可能扩大轴瓦损伤。"},{"id":146,"type":"single","stem":"内河船舶在弯曲河段下行时，为减小船队扫弯风险，正确的操作是","options":["适当减速并靠弯道凸岸一侧行驶","适当加速并靠弯道凹岸一侧行驶","保持全速沿河道中心线行驶","减速后靠弯道凹岸一侧行驶"],"answer":[0],"explanation":"知识点为弯曲河段操船。下行过弯应减速并靠凸岸一侧，利用缓流并留出船尾外摆空间；凹岸水流扫冲强，靠凹岸易被推压向岸边，全速沿中心线则难以控制船队偏转。"},{"id":147,"type":"single","stem":"内河船舶在夜间航行时，看到前方来船显示红、绿两盏舷灯及两盏白灯，该船最可能是","options":["长度较长的在航机动船","锚泊中的船舶","搁浅中的船舶","正在作业的挖泥船"],"answer":[0],"explanation":"知识点为号灯识别。显示红绿舷灯说明在航机动船，加两盏白灯通常对应长度较大的机动船；锚泊船仅显示锚灯，搁浅船显示锚灯加垂直两盏红灯，挖泥船另有作业号灯组合。"},{"id":148,"type":"single","stem":"内河船舶柴油机运转中排气冒黑烟且功率下降，最可能的原因是","options":["喷油量过大或雾化不良","滑油温度过高","冷却水温过低","蓄电池电压不足"],"answer":[0],"explanation":"知识点为柴油机燃烧异常判断。黑烟说明燃烧不完全，常见于喷油过多、雾化不良或进气不足；滑油温度高多影响润滑，水温低易冒白烟，电压不足影响起动而非运行冒黑烟。"},{"id":149,"type":"single","stem":"内河船舶靠泊时，码头在右舷前方，水流由船尾向船首方向流动，正确的靠泊方式是","options":["顶流靠泊，船首略向上游","顺流靠泊，船首略向下游","横流靠泊，船身与码头平行","顶流靠泊，船尾先靠码头"],"answer":[0],"explanation":"知识点为靠泊操纵。水流由尾向首即顶流，应顶流靠泊并令船首略向上游，便于控制船位和速度；顺流靠泊不易控制，横流靠泊易压向码头，船尾先靠难以控制船首偏转。"},{"id":150,"type":"single","stem":"内河船舶消防演习中，机舱油类火灾使用固定式二氧化碳灭火系统前，必须完成的操作是","options":["确认人员撤离并封闭机舱开口","先启动通风机吹散烟雾","先用水冷却机舱四周舱壁","先打开机舱天窗释放热量"],"answer":[0],"explanation":"知识点为固定式二氧化碳灭火系统使用条件。施放前必须确认人员全部撤离并封闭开口，防止窒息和灭火剂流失；启动通风会助燃并吹散灭火剂，先用水冷却是辅助手段，打开天窗会泄漏灭火剂。"},{"id":151,"type":"single","stem":"内河船舶在航行中发现船首水尺读数比船尾大，说明该船处于","options":["艏倾状态","艉倾状态","正浮状态","横倾状态"],"answer":[0],"explanation":"知识点为船舶浮态判断。船首吃水大于船尾吃水为艏倾，反之为艉倾，首尾吃水相等为正浮，横倾看左右舷吃水差。干扰项均为真实浮态名称，未掌握定义者易选错。"},{"id":152,"type":"single","stem":"内河船舶在狭水道航行时，为减小船吸现象，两船交会时应采取的措施是","options":["适当减速并保持足够横距","加速尽快通过会遇点","尽量靠近对方船航行","保持全速并鸣笛示意"],"answer":[0],"explanation":"知识点为船吸现象与狭水道交会。船吸随船速和横距变化，减速并加大横距可减小压差；加速会增强船吸，靠近对方更危险，仅鸣笛不能消除船吸。"},{"id":153,"type":"multi","stem":"内河船舶在航行中发生人员落水，驾驶台采取的正确处置包括","options":["立即停车并向落水者一侧操舵","鸣放人员落水声号并报告船长","抛投救生圈并派专人瞭望落水者","立即倒车使船尾靠近落水者","保持原航向继续航行等待救援"],"answer":[0,1,2],"explanation":"知识点为人员落水应急程序。应立即停车、向落水者一侧操舵，鸣放声号报告船长，抛救生圈并专人瞭望；立即倒车易使船尾伤及落水者，保持原航向会远离落水者延误救援。"},{"id":154,"type":"single","stem":"内河船舶在能见度不良水域航行时，驾驶人员按规定采取的最重要措施是","options":["减速并按规定鸣放声号，必要时择地锚泊","保持原速并加强瞭望，尽快驶出雾区","开启航行灯继续航行，同时用电话报告船位","沿航道中心线全速行驶，避免偏离主航道"],"answer":[0],"explanation":"知识点：能见度不良时的航行安全措施。正确项符合减速、鸣号、必要时锚泊的规范处置。保持原速会缩短反应距离；仅开灯报告不能解决碰撞风险；全速行驶在雾中极易偏离航道并发生碰撞。"},{"id":155,"type":"single","stem":"内河船舶舵机在航行中突然失灵，驾驶人员首先应当采取的措施是","options":["立即停车并显示失控信号，同时用应急舵或备用操舵装置","继续用主机推进，靠水流慢慢修正航向","立即抛锚将船固定，再检查舵机故障","通知机舱修理，驾驶台维持原航向等待"],"answer":[0],"explanation":"知识点：舵机失灵应急处置。正确项先控制船舶运动状态并显示失控信号，同时启用应急操舵。继续推进无法转向会加剧危险；立即抛锚在航道中可能造成碍航或损坏锚机；原地等待修理会使失控船继续漂移。"},{"id":156,"type":"single","stem":"内河船舶主机在航行中突然熄火，轮机人员检查发现燃油日用柜出口阀被误关，正确处置顺序是","options":["先开阀恢复供油并排气，再按程序启动主机","先拆检高压油泵，确认无损坏后再开阀","先向驾驶台报告停车，等待指令后再开阀","先切换备用燃油柜，再关闭原日用柜出口阀"],"answer":[0],"explanation":"知识点：主机熄火的燃油系统故障判断与处置。正确项先恢复燃油通路并排出空气，再启动主机。先拆检会造成不必要停航；等待指令会延误恢复时机；切换备用柜而不开原阀不能建立供油。"},{"id":157,"type":"single","stem":"内河船舶靠泊过程中，驾驶人员发现船舶余速偏大且倒车制动效果不明显，此时最合理的处置是","options":["及时加抛外挡锚并配合倒车，控制船身贴靠速度","立即满舵转向码头，利用船首靠把缓冲","通知机舱加大倒车功率，同时让船首人员用手推挡","保持余速让船体自然贴靠，靠把可吸收全部冲力"],"answer":[0],"explanation":"知识点：靠泊余速控制与应急措施。正确项用锚和倒车共同控制余速。满舵转向码头会加大撞击风险；仅加大倒车可能来不及且手推无法制动；靠把不能吸收全部冲力，自然贴靠极易撞坏码头或船体。"},{"id":158,"type":"single","stem":"内河船舶在狭窄弯道下行时与上行船相遇，按规定下行船应当","options":["提前减速并靠右行驶，鸣号示意会让意图","加速抢先通过弯道，以减少两船相遇时间","靠弯道外侧行驶，把内侧让给上行船","保持航向和航速，由上行船主动避让"],"answer":[0],"explanation":"知识点：弯道会让原则。正确项符合下行船减速、靠右、鸣号示意的要求。加速抢道易在弯道形成紧迫局面；靠外侧行驶不符合靠右会让习惯；保持航速等待对方避让违反下行船应主动减速让行的原则。"},{"id":159,"type":"single","stem":"内河船舶航行中，轮机人员发现主机滑油压力逐渐下降但油温正常，首先应当检查的是","options":["滑油滤器是否堵塞及油位是否过低","主机转速是否超过额定转速","冷却水温度是否过高","燃油日用柜油位是否正常"],"answer":[0],"explanation":"知识点：滑油压力下降的常见原因。正确项检查滤器堵塞和油位不足。转速过高通常使油温同步上升；冷却水温高主要影响热负荷；燃油柜油位与滑油压力无直接关系。"},{"id":160,"type":"single","stem":"内河船舶在航行中发生人员落水，驾驶人员应当优先采取的措施是","options":["立即停车并向落水者一侧操满舵，同时抛投救生圈","继续航行到缓流水域后再掉头返回搜救","立即抛锚固定船位，再放救生艇搜索","通知机舱加速，尽快驶向前方码头报警"],"answer":[0],"explanation":"知识点：人员落水应急操纵。正确项立即停车、向落水侧操舵并抛救生圈。继续航行会远离落水者；抛锚固定船位不利于接近落水者；加速驶离会延误最佳救援时机。"},{"id":161,"type":"single","stem":"内河船舶在进闸前，驾驶人员对船舶吃水与闸槛水深关系的正确做法是","options":["核对本船实际吃水与闸槛水深，留足富余水深后再进闸","按船舶证书标注的满载吃水直接进闸","只要闸室内有足够长度，吃水不必再核对","按上次过闸时的吃水数据进闸即可"],"answer":[0],"explanation":"知识点：过闸前吃水与闸槛水深核对。正确项要求核对实际吃水并留富余水深。证书吃水不一定等于当前实际吃水；闸室长度与吃水无关；上次数据不能反映当前装载和闸槛水深变化。"},{"id":162,"type":"single","stem":"内河船舶在航行中主机排烟颜色突然变黑且转速下降，轮机人员判断最可能的原因是","options":["燃油供给过多或喷油雾化不良导致燃烧不完全","冷却水温度过低使燃烧变慢","滑油压力过高使机油进入燃烧室","海水泵流量过大使排气背压升高"],"answer":[0],"explanation":"知识点：主机排烟异常与燃烧状态判断。正确项为燃油过多或雾化不良。冷却水温过低一般冒白烟；滑油压力高不会直接使排烟变黑；海水泵流量与排气背压无直接关系。"},{"id":163,"type":"single","stem":"内河船舶在锚泊期间遇到走锚，值班人员正确的处置是","options":["立即报告驾驶台并备车，必要时加抛另一锚","继续观察锚链受力，等待走锚自行停止","先收回锚链再重新抛锚，不必报告驾驶台","通知机舱停车，让船舶随流漂移等待救援"],"answer":[0],"explanation":"知识点：走锚应急处理。正确项立即报告、备车并视情加抛锚。等待走锚自行停止会扩大危险；先收链不报告会延误处置；随流漂移可能造成搁浅或碰撞。"},{"id":164,"type":"single","stem":"内河船舶在航行中舵角指示器读数与实际舵叶角度不一致，驾驶人员应当","options":["立即减速并用应急操舵或人工舵核对，必要时停车检修","按指示器读数继续操舵，等靠泊后再修理","加大舵角补偿误差，保持航向不变","通知机舱提高主机转速，用速度弥补舵效不足"],"answer":[0],"explanation":"知识点：舵角指示失真处置。正确项减速、改用应急或人工操舵并检修。按错误读数操舵会偏离航道；加大舵角补偿可能造成操舵失控；提高转速不能解决舵角指示错误。"},{"id":165,"type":"multi","stem":"内河船舶在航行中发现机舱舱底水位异常升高，轮机人员应当采取的措施包括","options":["立即查明漏水来源并启动舱底泵排水","检查舱底泵吸入滤器是否堵塞","关闭相关海底阀并报告驾驶台","继续观察水位，等靠泊后再处理","向舱底注入压载水以平衡船体"],"answer":[0,1,2],"explanation":"知识点：舱底异常进水处置。正确项包括查源排水、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；调速器调至最高会使启动转速失控；关闭冷却水会导致启动后过热。"},{"id":184,"type":"single","stem":"内河船舶在装卸危险货物时，船员在甲板作业中正确的做法是","options":["穿化纤工作服并携带打火机备用于照明","穿防静电工作服并禁止明火和吸烟","用铁质工具敲击货舱盖以检查密闭","在货舱附近临时进行电焊修补"],"answer":[1],"explanation":"知识点：危险货物装卸的防火防爆要求。正确项对在防静电服可减少静电火花，禁火禁烟是基本要求。化纤服易产生静电且打火机属明火；铁质工具敲击易产生火花；货舱附近电焊属严重违章动火。"},{"id":185,"type":"single","stem":"内河船舶在枯水期通过浅滩河段时，驾驶员为减少搁浅风险应当","options":["沿航道最深处缓速通过并加强测深","尽量靠岸边行驶以避开主流","加速冲过浅滩减少吃水时间","关闭测深仪避免误报干扰操舵"],"answer":[0],"explanation":"知识点：浅滩河段的操船与防搁浅措施。正确项对在缓速可减小下沉量并留出测深和调整余地。靠岸边水更浅；加速会增加下沉量更易触底；关闭测深仪失去重要参考。"},{"id":186,"type":"multi","stem":"内河船舶在台风来临前于港内防台，以下属于正确防台措施的是","options":["加强缆绳并在船体与码头间加设防撞缓冲","提前检查锚机使其随时可用","船舶在码头并靠时增加系缆数量","将所有船员集中到船首舱室避风","在舷外悬挂重物以增加稳性"],"answer":[0,1,2],"explanation":"知识点：台风防抗的船舶准备措施。正确项对在加强系缆与缓冲、保证锚机可用、增加系缆数量均为常规有效手段。集中到船首舱室会增加船首受风面积风险；舷外悬挂重物会破坏稳性并可能碰撞码头。"},{"id":187,"type":"single","stem":"内河船舶在能见度不良水域航行时，驾驶人员按规鸣放声号后，还应采取的首要措施是","options":["立即加车抢在雾浓前驶出该水域","派专人在船首瞭望并减速","保持原速并连续鸣笛示警","靠边抛锚等待能见度好转"],"answer":[1],"explanation":"知识点：能见度不良时的航行安全操作。正确项对：应减速、派人瞭望、必要时备车，以便及时发现来船和障碍物。A错：加车会缩短反应时间，是冒进做法；C错：原速行驶已失去安全余量；D错：未判断水深和通航条件就抛锚可能造成搁浅或碍航。"},{"id":188,"type":"single","stem":"内河船舶舵机在航行中突然失灵，驾驶人员首先应做的操作是","options":["立即停车并显示失控信号","改用应急舵继续原速航行","加大油门靠舵力恢复","通知机舱检查电路后再降速"],"answer":[0],"explanation":"知识点：舵机失灵应急处置。正确项对：应停车、显示失控信号、通知机舱并采取措施控制船位。B错：舵已失灵原速航行会迅速扩大危险；C错：加油门只会加剧失控；D错：先通知而不先控制船速会延误时机。"},{"id":189,"type":"single","stem":"内河船舶在狭窄弯道下行时，为便于与上行船统一会让意图，通常应鸣放的声号是","options":["一长声","两长声","一长一短声","两长一短声"],"answer":[2],"explanation":"知识点：内河船舶会让声号。正确项对：下行船在弯道等需统一会让意图时通常鸣一长一短声表示要求会船。A错：一长声多用于表示本船动向；B错：两长声不是弯道会让的统一声号；D错：两长一短声不符合该场景常规用法。"},{"id":190,"type":"single","stem":"内河船舶靠泊时，当船首与码头夹角过大且余速较快，最有效的控制方法是","options":["船首带缆后加车顶推","倒车并配合船尾缆控制","满舵使船首贴向码头","抛下船首锚后停车"],"answer":[1],"explanation":"知识点：靠泊操纵中的余速与角度控制。正确项对：倒车可消减余速，船尾缆可抑制船尾外摆，逐步调整靠拢角度。A错：首缆加车顶推易造成船首挤压码头；C错：满舵贴靠会加大撞击风险；D错：靠泊中随意抛锚会损伤锚链并影响操纵。"},{"id":191,"type":"single","stem":"内河船舶主机滑油压力突然下降并报警，轮机人员正确的第一步处置是","options":["立即换用备用滑油泵并继续运行","先降速运行观察压力是否回升","立即停车检查并排除故障","加大冷却水量降低油温"],"answer":[2],"explanation":"知识点：主机滑油压力异常的应急处理。正确项对：滑油压力骤降会迅速造成轴瓦烧损，应立即停车检查。A错：未查明原因就切泵运行风险大；B错：继续运行可能扩大机损；D错：油温不是压力骤降的直接原因，加大冷却不能解决润滑中断。"},{"id":192,"type":"single","stem":"内河船舶在汛期通过桥区水域时，驾驶人员应重点考虑的水流因素是","options":["桥墩上游的横流和桥孔处的收缩流","桥面风速对船体的抬升作用","桥区水深对吃水的限制","桥区航标灯的闪光周期"],"answer":[0],"explanation":"知识点：桥区水域汛期水流特点。正确项对：桥墩附近易形成横流，桥孔处流速增大，直接影响船舶操纵。B错：桥面风速不是水流因素；C错：水深属于通航尺度而非水流因素；D错：航标闪光周期与水流操纵无关。"},{"id":193,"type":"single","stem":"内河船舶在受限水域追越前船时，追越船应首先","options":["鸣放追越声号并取得前船同意","从前船右舷快速通过","加速并保持航向不变","用甚高频通知前船后直接超越"],"answer":[0],"explanation":"知识点：追越前的声号与协调程序。正确项对：追越船应鸣放追越声号，待前船同意后方可追越。B错：未取得同意就选定舷侧通过不符合程序；C错：加速保持航向可能造成紧迫局面；D错：仅用VHF通知不能替代规定声号与同意程序。"},{"id":194,"type":"single","stem":"内河船舶机舱发生火灾且火势较大无法用灭火器扑灭时，正确的处置是","options":["立即封闭机舱并释放固定灭火系统","打开机舱门窗散热后继续灭火","用水直接向电气设备冲浇","先启动主机撤离再灭火"],"answer":[0],"explanation":"知识点：机舱火灾的固定灭火系统使用。正确项对：应停机、封舱、释放固定灭火系统并切断相关油路电路。B错：开窗通风会助长火势；C错：电气火灾直接用水浇有触电和短路危险；D错：带火运行会扩大事故并危及船舶安全。"},{"id":195,"type":"single","stem":"内河船舶航行中有人落水，驾驶人员应首先","options":["立即停车并向落水者一侧操舵","加速前进绕圈返回","继续航行并呼叫落水者","先抛锚固定船位再救人"],"answer":[0],"explanation":"知识点：人员落水应急操纵。正确项对：应立即停车，向落水者一侧操舵，防止螺旋桨伤害并便于救援。B错：加速绕圈会延误救助并可能撞击落水者；C错：继续航行会远离落水者；D错：抛锚不能迅速接近落水者，且可能造成其他危险。"},{"id":196,"type":"single","stem":"内河船舶在弯曲河段下行时，为便于及早发现来船，通常应选择的航路是","options":["尽量靠凸岸一侧行驶","尽量靠凹岸一侧行驶","沿河道中心线行驶","在缓流区任意选择一侧"],"answer":[0],"explanation":"知识点：弯曲河段航路选择。凸岸一侧水流较缓、视距较好，便于及早发现来船并留有避让余地，正确项符合常规做法；凹岸一侧水深流急且视线易被岸形遮挡；河道中心线并非弯曲段的最佳选择；缓流区任意选择一侧缺乏对弯曲河段视距的考虑。"},{"id":197,"type":"single","stem":"内河船舶轮机值班中发现主机滑油压力持续下降但尚未低于报警值，值班人员应首先","options":["继续观察待报警后再处理","立即停车并拆检滑油泵","检查滑油油位及滤器并报告","加大转速以提升油压"],"answer":[2],"explanation":"知识点：主机滑油压力异常的处置程序。压力持续下降说明系统可能缺油或滤器堵塞，应先检查油位和滤器并报告轮机长，正确项符合逐步排查原则；待报警后再处理会错过早期处置时机；立即停车拆检属于越级操作；加大转速会加剧磨损并使油压进一步下降。"},{"id":198,"type":"single","stem":"内河船舶在靠泊过程中，船首缆的作用主要是","options":["防止船首向外偏转","控制船舶后退速度","承受船舶全部横向力","替代锚泊固定船位"],"answer":[0],"explanation":"知识点：靠泊缆绳的作用。船首缆主要约束船首向外偏转，正确项符合缆绳受力分工；控制后退速度主要靠倒车和尾缆；单根船首缆不承受全部横向力；靠泊缆绳不能替代锚泊。"},{"id":199,"type":"single","stem":"内河船舶柴油机运转中出现排气冒黑烟，最可能的原因是","options":["喷油量过少","进气量不足","冷却水温偏高","滑油黏度偏低"],"answer":[1],"explanation":"知识点：柴油机排气烟色与故障判断。冒黑烟通常为燃烧不完全，进气量不足使油气比失调，正确项符合故障机理；喷油量过少一般导致功率不足而非黑烟；冷却水温偏高影响热负荷但不直接造成黑烟；滑油黏度偏低与燃烧烟色无直接关系。"},{"id":200,"type":"single","stem":"内河船舶在航行中舵机失灵，驾驶台首先应采取的处置是","options":["立即抛锚固定船位","通知机舱并显示失控信号","加速驶向最近浅滩","关闭主机等待救援"],"answer":[1],"explanation":"知识点：舵机失灵应急程序。首先应通知机舱抢修并按规则显示失控信号以警示他船，正确项符合应急顺序；立即抛锚可能因船速和水深造成危险；加速驶向浅滩会扩大事故；关闭主机等待救援会丧失操纵主动性。"},{"id":201,"type":"single","stem":"内河船舶在汛期航行时，对水流影响的正确判断是","options":["汛期流速增大，应适当减速并远离岸壁","汛期水位上升，可贴近岸壁行驶","汛期流态平稳，可按常速航行","汛期应尽量靠主流中心加速通过"],"answer":[0],"explanation":"知识点：汛期水流对操纵的影响。汛期流速增大、流态紊乱，应减速并保持与岸壁的安全距离，正确项符合安全要求；贴近岸壁易受回流和岸吸影响；汛期流态并不平稳；靠主流中心加速会增加失控风险。"},{"id":202,"type":"single","stem":"内河船舶在夜间航行时，判断来船动向主要依据的是","options":["来船号灯的显示情况","来船船体的颜色","来船驾驶台的高度","来船甲板货物的多少"],"answer":[0],"explanation":"知识点：夜间避碰判断依据。夜间主要依据号灯显示判断来船类型和动向，正确项符合避碰规则；船体颜色、驾驶台高度、货物多少在夜间难以辨认且不能作为判断动向的依据。"},{"id":203,"type":"single","stem":"内河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先保留必要缆绳，待车舵起作用后再解缆，不能先解全部缆绳。D错：满舵快速摆首会使船舶失控，可能碰撞码头或相邻船舶。"},{"id":223,"type":"single","stem":"内河船舶航行中舵机失灵，驾驶人员采取应急措施，下列处置程序正确的是","options":["立即停车并抛双锚制动","改用应急舵并显示失控信号","通知机舱后继续全速航行","先转手操舵再通知船长"],"answer":[1],"explanation":"知识点：舵机失灵应急程序。正确项对：应改用应急舵操纵并按规定显示失控信号，同时通知机舱和船长。A错：立即停车抛双锚可能造成锚链断裂或船体损伤，不是首选。C错：舵机失灵继续全速航行极其危险。D错：应优先改用应急舵并显示信号，仅转手操舵不完整。"},{"id":224,"type":"single","stem":"内河船舶在航行中发现船首前方有人员落水，驾驶人员应当采取的首要行动是","options":["立即倒车使船后退","向落水者一舷转舵并抛救生圈","先鸣笛再继续原航向观察","停车并等待其他船舶救助"],"answer":[1],"explanation":"知识点：人员落水应急操纵。正确项对：应向落水者一舷转舵并抛救生圈，使船尾摆开避免螺旋桨伤害，同时便于救援。A错：立即倒车可能使落水者卷入螺旋桨。C错：继续原航向会远离落水者，延误救援。D错：停车等待不能主动接近落水者，错失救援时机。"},{"id":225,"type":"single","stem":"内河船舶柴油机排气冒黑烟，值班轮机员分析原因时，下列判断正确的是","options":["喷油量过少导致燃烧不完全","喷油器雾化不良或供气不足","冷却水温过低引起燃烧恶化","滑油压力过高造成燃油稀释"],"answer":[1],"explanation":"知识点：柴油机排气冒黑烟的故障分析。正确项对：黑烟通常因燃油雾化不良或进气不足导致燃烧不完全。A错：喷油量过少一般冒白烟或功率不足，不是黑烟主因。C错：冷却水温过低影响较小，不是黑烟典型原因。D错：滑油压力过高与燃油稀释无直接关系，不会导致黑烟。"},{"id":226,"type":"single","stem":"内河船舶在锚泊时，值班驾驶员发现船舶走锚，正确的处置是","options":["立即加抛另一锚并报告船长","先收回锚链再重新抛锚","通知机舱备车后继续观察","等待锚链受力后再判断"],"answer":[0],"explanation":"知识点：锚泊走锚的应急措施。正确项对：发现走锚应立即加抛另一锚并报告船长，控制船舶漂移。B错：先收锚链会使船舶失去抓力，可能加剧走锚。C错：仅备车继续观察不能阻止走锚，可能碰撞他船或搁浅。D错：等待锚链受力可能已错过处置时机，走锚应果断行动。"},{"id":227,"type":"single","stem":"内河船舶在通过桥梁前，驾驶人员对通航净空高度的判断，下列做法正确的是","options":["仅凭本船桅杆高度估算净空","查阅最新航行通告并核对当时水位","按设计最高通航水位直接通过","跟随前船通过即可不必核对"],"answer":[1],"explanation":"知识点：桥区通航净空高度判断。正确项对：应查阅最新航行通告并结合当时水位核对净空高度，确保安全通过。A错：仅凭桅杆高度估算未考虑水位变化和天线等突出物。C错：设计最高通航水位不等于当时实际水位，不能直接通过。D错：跟随前船不能代替本船核对，各船高度和吃水不同。"},{"id":228,"type":"single","stem":"内河船舶主机的冷却水系统在运转中水温过高，轮机员排查时首先应检查的项目是","options":["滑油滤器是否堵塞","海水泵是否正常供水","燃油日用柜油位高低","主机转速是否超过额定"],"answer":[1],"explanation":"知识点：主机冷却水温过高故障排查。正确项对：水温过高首先应检查海水泵是否正常供水，确保冷却水循环。A错：滑油滤器堵塞影响润滑，不直接导致冷却水温高。C错：燃油日用柜油位与冷却水温无直接关系。D错：转速过高可能使热负荷增大，但应先确认冷却水供应是否正常。"},{"id":229,"type":"single","stem":"内河船舶在夜间航行时，驾驶人员对号灯显示的判断，下列做法正确的是","options":["仅凭对方号灯颜色判断其航向","结合号灯显示与雷达观测综合判断","看到红绿舷灯即判定为对遇局面","夜间航行可关闭桅灯仅开舷灯"],"answer":[1],"explanation":"知识点：夜间号灯识别与局面判断。正确项对：应结合号灯显示与雷达观测综合判断他船动态，避免单一依据误判。A错：仅凭号灯颜色不能完全确定航向，需结合其他信息。C错：看到红绿舷灯不一定是对遇，也可能是交叉局面。D错：夜间航行必须按规定显示桅灯，不能仅开舷灯。"},{"id":230,"type":"single","stem":"内河船舶舵机在航行中突然失灵，值班驾驶员首先应当","options":["立即报告船长并显示失控信号","马上切换到应急舵继续原航线","停车后抛锚等待机舱修复","通知机舱换用另一台舵机电源"],"answer":[0],"explanation":"知识点：舵机失灵应急程序。首要动作是报告船长并显示失控信号以警示周围船舶。切应急舵、停车抛锚、换电源属于后续或具体处置手段，需在船长指挥下进行，不能替代第一时间的报警示警。"},{"id":231,"type":"single","stem":"内河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":["浅水效应使船底流速增大压力降低","浅水使螺旋桨推力明显增大","浅水使船舶吃水变小浮力增加","浅水使舵叶面积相对水流变小"],"answer":[0],"explanation":"知识点：浅水效应。浅水区船底与河床间隙小，水流加速、压力降低，导致船体下沉、舵效变差。螺旋桨推力在浅水不会明显增大；吃水不会变小浮力也不会增加；舵叶面积并不改变，故其余选项错误。"},{"id":232,"type":"single","stem":"内河船舶在靠泊过程中，为减小船首向码头方向的偏转，通常采用的操作是","options":["用倒车配合外舷舵","用进车配合内舷舵","双车船同时正车","抛首锚后全速进车"],"answer":[0],"explanation":"知识点：靠泊操纵中的舵桨配合。靠泊时常用倒车配合外舷舵，利用排出流和舵力控制船首偏转。进车配合内舷舵会加剧偏转；双车同时正车会增大前进冲力；抛首锚后全速进车会造成锚链受力过大，均不合操纵要求。"},{"id":233,"type":"single","stem":"内河船舶柴油机运转中出现排烟温度明显升高、排烟发黑，最可能的原因是","options":["喷油量过大或雾化不良","冷却水温偏高","滑油压力偏低","进气温度偏低"],"answer":[0],"explanation":"知识点：柴油机燃烧异常判断。排温升高伴黑烟多因喷油过多或雾化不良造成燃烧不完全。冷却水温高、滑油压力低属其他系统故障，不直接造成黑烟；进气温度偏低影响燃烧但一般不会导致明显黑烟。"},{"id":234,"type":"single","stem":"内河船舶主柴油机滑油压力突然降至报警值以下，值班轮机员应当","options":["立即降速并检查滑油系统","先观察一段时间再决定","加大油门提高滑油泵转速","关闭滑油冷却器旁通阀"],"answer":[0],"explanation":"知识点：滑油低压应急处理。滑油压力骤降会危及轴承，应立即降速并检查系统。继续观察会扩大损坏；加大油门不能提高滑油压力反而加剧磨损；关闭冷却器旁通阀与滑油压力无直接关系。"},{"id":235,"type":"single","stem":"内河船舶发电柴油机在运行中频率升高、电压随之升高，若此时负荷未变化，首先应检查","options":["调速器及燃油供给系统","发电机励磁回路","配电板主开关","电缆绝缘电阻"],"answer":[0],"explanation":"知识点：发电柴油机转速与频率关系。频率升高说明转速升高，应先查调速器和燃油供给。励磁回路影响电压但不改变频率；主开关和电缆绝缘与转速频率无直接关系。"},{"id":236,"type":"single","stem":"内河船舶在通过桥孔前，驾驶员应重点核对的是","options":["桥孔净空高度与本船水线以上高度","桥孔宽度与本船船长","桥区水深与本船吃水","桥墩间距与本船船宽"],"answer":[0],"explanation":"知识点：桥区通航要素。过桥最关键是核对净空高度与水线以上高度，防止桅杆等触碰桥梁。桥宽、水深、桥墩间距也需关注，但首要防止的是高度不足造成的碰撞。"},{"id":237,"type":"single","stem":"内河船舶在航行中发现本船右前方有一艘显示红绿舷灯和桅灯的船舶正横穿越，判断其动态的主要依据是","options":["看到其红灯说明其在我船右舷侧","看到其绿灯说明其在我船左舷侧","同时看到红绿灯说明其正对我船","只看到白灯说明其是锚泊船"],"answer":[0],"explanation":"知识点：号灯识别与避碰。看到他船红灯表示看到其左舷，即他船位于我船右舷侧方向。绿灯表示看到其右舷；同时见红绿两灯表示其正对我船；只看到白灯需结合其他号灯判断，不能直接断定为锚泊。"},{"id":238,"type":"single","stem":"内河船舶在汛期航行经过弯曲河段时，为减小扫弯水对船位的影响，通常应","options":["适当靠近凸岸一侧行驶","尽量沿凹岸主流带行驶","在河心保持正舵直航","加速冲过弯顶再调整"],"answer":[0],"explanation":"知识点：弯曲河段操纵。汛期弯道扫弯水强，适当靠凸岸一侧可减小横流影响。沿凹岸主流带受扫弯水冲击大；河心直航难以控制船位；加速冲过弯顶易失控，均不妥。"},{"id":239,"type":"multi","stem":"内河船舶在进行消防演习时，下列做法中符合要求的有","options":["按应变部署表集合人员并点名","现场演示灭火器使用方法","记录演习开始与结束时间","演习结束后立即解散不作讲评","仅由驾驶员操作不需要船员参与"],"answer":[0,1,2],"explanation":"知识点：消防演习组织要求。集合点名、演示灭火器使用、记录演习时间均符合演习要求。演习后应进行讲评总结，不能立即解散；演习要求全体船员按部署参与，不能仅由驾驶员操作。"},{"id":240,"type":"single","stem":"内河船舶在能见度不良水域航行时，驾驶人员按规定采取的最基本安全措施是","options":["开启航行灯并鸣放声号，同时派专人瞭望","开启航行灯后由值班驾驶员独自加强瞭望","鸣放声号后通知机舱备车随时停车","开启雷达后保持原速继续航行"],"answer":[0],"explanation":"知识点：能见度不良时的航行安全措施。正确项为综合措施，既显示灯光声号又派专人瞭望，符合规定要求。错误项B缺少专人瞭望环节；错误项C未显示灯光且措施不完整；错误项D保持原速航行不符合能见度不良时的减速要求。"},{"id":241,"type":"single","stem":"内河船舶在狭窄航道内追越前船时，除鸣放追越声号外还应满足的条件是","options":["取得前船同意并确认有足够安全距离","确认前船速度低于本船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深了解搁浅部位与周围水深，显示搁浅信号警告来船并评估脱浅方案。A错在盲目倒车可能扩大破损或使船体进一步坐浅；C错在双锚固定会限制脱浅操作；D错在关闭主机失去自救能力。"},{"id":279,"type":"single","stem":"内河船舶使用磁罗经时，船体钢铁和电气设备引起的偏差称为","options":["自差","磁差","年差","罗经差"],"answer":[0],"explanation":"知识点：磁罗经误差概念辨析。正确项：船磁影响产生的误差称自差。B错在磁差是地磁变化引起的；C错在年差是磁差逐年变化量；D错在罗经差是磁差与自差的合成。"},{"id":280,"type":"single","stem":"内河船舶主机在低负荷长时间运转后，轮机员应重点检查的项目是","options":["扫气箱积炭与缸套磨损","淡水舱液位与压载量","舵机油缸油位与舵角","锚链舱积水与锚链锈蚀"],"answer":[0],"explanation":"知识点：低负荷运转对柴油机的影响。正确项：长期低负荷易造成燃烧不良、扫气箱积炭和缸套低温腐蚀磨损。B错在淡水舱液位属日常管理不因低负荷特别检查；C错在舵机与主机负荷无直接关系；D错在锚链舱属甲板部检查项目。"},{"id":281,"type":"multi","stem":"内河船舶在航经桥区水域时，为保证安全应遵守的操作有","options":["提前核对通航孔净空高度与净宽","按桥区规定显示信号并保持VHF守听","在桥孔内追越前船以缩短通过时间","通过前减速并保持舵效","桥区水域内可随意掉头调整航向"],"answer":[0,1,3],"explanation":"知识点：桥区水域通航安全规定。正确项：核对净空尺寸、守听VHF并显示信号、减速保持舵效均为桥区安全操作要点。C错在桥孔内禁止追越；E错在桥区禁止掉头或横越。"},{"id":282,"type":"single","stem":"内河船舶在能见度不良水域航行时，驾驶人员按规章采取的行动中，首要步骤应是","options":["立即加车抢在雾浓前驶出该水域","鸣放规定的雾号并派专人瞭头","关闭航行灯避免灯光在雾中散射","沿原航向保持全速以便尽快通过"],"answer":[1],"explanation":"知识点：能见度不良时的应急程序。正确项：雾航首要步骤是鸣放雾号、派瞭头、减速待机，以尽早发现来船和障碍。错误项：加车抢行会缩短反应时间；关灯反而失去他船发现本船的机会；保持全速通过属于冒险操作。"},{"id":283,"type":"single","stem":"内河船舶主机在运转中突然出现冷却水温急剧升高并伴有排出水温报警，轮机人员首先应做的处置是","options":["立即停车并打开膨胀水箱盖泄压","降速运行并检查冷却水泵与管路","加大冷却水投药量降低水温","维持转速观察水温是否自行回落"],"answer":[1],"explanation":"知识点：主机冷却系统异常处置。正确项：先降速减轻热负荷，再检查水泵、管路、滤器等是否堵塞或失效。错误项：立即停车开箱盖易被高温蒸汽烫伤且未查明原因；单纯投药不解决循环故障；维持转速观察会使温度继续上升。"},{"id":284,"type":"single","stem":"内河船舶靠泊时，驾驶人员发现本船船首向码头方向偏转过快，正确的操船处置是","options":["立即加车顶推码头以稳住船首","用倒车并配合舵使船首向码头靠拢","暂停用车待船首自然回正后再靠","向偏转反方向压舵并适当减速"],"answer":[3],"explanation":"知识点：靠泊时的船首偏转控制。正确项：向偏转反方向压舵并减速，可抑制偏转并保留调整余地。错误项：加车顶推会加剧碰撞风险；倒车配合舵在靠泊末段易使船尾甩向码头；暂停用车会让偏转继续发展。"},{"id":285,"type":"single","stem":"内河船舶航行中，舵机液压系统出现油压波动且舵角反馈滞后，轮机人员判断故障时应优先检查","options":["舵机液压油缸密封与油路是否进气","舵机电机供电电压是否偏低","驾驶台舵角指示器灯泡是否损坏","舵机间通风是否满足散热要求"],"answer":[0],"explanation":"知识点：液压舵机故障诊断。正确项：油压波动伴反馈滞后多因油路进气或油缸密封失效，应优先检查密封与排气。错误项：供电偏低多表现为动作无力而非波动；指示灯泡损坏只影响显示；通风不足影响油温而非油压波动。"},{"id":286,"type":"single","stem":"内河船舶在狭窄弯曲河段下行时，为减小船队扫弯宽度，驾驶人员通常采用的措施是","options":["尽量靠近凸岸一侧行驶","尽量靠近凹岸一侧行驶","沿河道中心线保持高速通过","在弯道上口提前加车转向"],"answer":[0],"explanation":"知识点：弯曲河段操纵。正确项：下行船队应靠凸岸一侧行驶，利用水流较缓、弯道外侧让出对面来船航道。错误项：靠凹岸会加大扫弯宽度并挤压上行船；中心线高速通过增加会船风险；弯道上口加车转向易使船尾扫向凹岸。"},{"id":287,"type":"single","stem":"内河船舶消防演练中，机舱油类火灾使用固定式二氧化碳灭火系统释放后，人员应","options":["立即进入机舱检查灭火效果","待充分冷却后开舱通风再进入","先开舱门再释放二氧化碳","用机舱通风机加速气体排出"],"answer":[1],"explanation":"知识点：二氧化碳灭火后的进舱程序。正确项：释放后必须等待足够时间冷却，先通风换气并检测含氧量后再进入。错误项：立即进入会因缺氧和高温中毒窒息；先开门释放会使二氧化碳逸散失效；通风机在释放时开启会吹散灭火气体。"},{"id":288,"type":"single","stem":"内河船舶航行中发现船体水线附近出现轻微渗漏且漏量稳定，船员正确的应急处置是","options":["立即弃船并发出求救信号","用堵漏器材控制并报告船长","打开海底阀向舱内注水压载","继续航行到港后再安排修理"],"answer":[1],"explanation":"知识点：船体渗漏应急。正确项：先用堵漏毯、木楔等器材控制漏点，同时报告船长并监测水位。错误项：轻微渗漏未达弃船程度；向舱内注水会加重进水和倾斜；继续航行会扩大破损范围。"},{"id":289,"type":"single","stem":"内河船舶使用雷达助航时，为减少雨雪对回波的干扰，正确的操作是","options":["提高增益使目标回波更亮","降低增益并适当使用雨雪抑制","关闭海浪抑制以提高灵敏度","将量程调到最大以显示全部目标"],"answer":[1],"explanation":"知识点：雷达抗雨雪干扰操作。正确项：雨雪干扰应适当降低增益并启用雨雪抑制功能，保持目标可辨。错误项：提高增益会放大雨雪杂波；关闭海浪抑制与雨雪干扰无关且会引入杂波；最大量程降低目标分辨率。"},{"id":290,"type":"single","stem":"内河船舶柴油机运转中排气冒蓝烟，轮机人员判断最可能的原因是","options":["喷油量过大导致燃烧不完全","机油进入燃烧室参与燃烧","燃油中含水造成燃烧不良","进气量不足使燃烧恶化"],"answer":[1],"explanation":"知识点：柴油机排气烟色判断。正确项：蓝烟通常表示机油窜入燃烧室，多与活塞环、缸套或气门导管磨损有关。错误项：喷油量过大多冒黑烟；燃油含水多冒白烟；进气不足多冒黑烟并伴功率下降。"},{"id":291,"type":"single","stem":"内河船舶在夜间航行时，驾驶人员看到来船显示红、绿两舷灯及桅灯，可判断该船","options":["正对本船驶来或驶离","正横方向通过本船船首","与本船构成交叉相遇局面","处于锚泊状态未在航"],"answer":[0],"explanation":"知识点：号灯识别与局面判断。正确项：同时看到红绿舷灯和桅灯，说明来船船首大致朝向本船或背向本船，属对遇或追越局面。错误项：正横通过只会看到一舷灯；交叉相遇只显示一舷灯加桅灯；锚泊船显示锚灯而非两舷灯。"},{"id":292,"type":"single","stem":"内河船舶装卸危险货物时，船岸双方应共同确认的关键安全事项是","options":["货物提单的签发日期","船岸连接管路的接地与防静电","货物的市场销售价格","船舶下次坞修的计划时间"],"answer":[1],"explanation":"知识点：危险货物装卸安全。正确项：装卸危险货物前必须确认管路接地、防静电连接、消防器材和应急措施到位。错误项：提单日期属商务事项；销售价格与安全无关；坞修计划不属装卸前确认内容。"},{"id":293,"type":"single","stem":"内河船舶在能见度不良水域航行时，驾驶台应按规定显示或开启的声号是","options":["每隔不超过1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2分钟鸣放一长一短声"],"answer":[0],"explanation":"知识点为内河能见度不良时的声号规定。能见度不良时航行中船舶应每隔不超过1分钟鸣放一长声，以警示周围船舶；两长声多用于其他操纵意图声号，一长两短声通常表示掉头或转向意图，一长一短声也不是能见度不良的警示声号。"},{"id":294,"type":"single","stem":"内河船舶在驶近弯曲航段且无法与来船取得联系时，应当采取的措施是","options":["减速并鸣放一长声，必要时停车","加速通过弯曲段以缩短会遇时间","保持原速并鸣放两短声示意来船","靠航道左侧行驶并连续鸣放短声"],"answer":[0],"explanation":"知识点为弯曲航段的安全航行措施。接近弯曲航段且无法联系来船时应减速、鸣放一长声并做好停车准备，以便随时避让；加速通过会增加碰撞风险，保持原速并鸣短声不能替代减速备车，靠左侧行驶违反靠右航行原则且连续短声并非规定的弯道警示方式。"},{"id":295,"type":"single","stem":"内河船舶柴油机运转中机油压力突然下降并伴有异常敲击声，值班轮机员首先应当","options":["立即降速并停车检查润滑系统","加大冷却水量观察压力是否恢复","提高转速使机油泵供油量增大","继续运转并记录压力变化待交班处理"],"answer":[0],"explanation":"知识点为柴油机润滑系统故障的应急处理。机油压力骤降伴敲击声说明润滑可能失效，应立即降速停车检查，防止烧瓦等重大机损；加大冷却水量与润滑无关，提高转速会加剧干摩擦，继续运转待交班将扩大事故。"},{"id":296,"type":"single","stem":"内河船舶航行中发现舵机失灵，驾驶台首先应当采取的措施是","options":["立即减速停车并显示失控信号","改用应急舵并保持原速继续航行","通知机舱换用另一台舵机后原速行驶","转入手动操舵并加速驶向就近码头"],"answer":[0],"explanation":"知识点为舵机失灵时的应急程序。舵机失灵应立即减速停车、显示失控信号并通知机舱，防止船舶失控碰撞；保持原速或加速都会加大危险，仅换舵机不减速不能解决当下失控风险。"},{"id":297,"type":"single","stem":"内河船舶在港内进行明火作业前，除办理审批手续外还必须落实的措施是","options":["清除动火区域可燃物并配备消防器材和看火人员","安排一名船员在动火点附近值守即可","动火结束后立即离开现场不必检查余火","选择风力较大的时段动火以减少烟气聚集"],"answer":[0],"explanation":"知识点为船舶明火作业的防火措施。动火前应清除可燃物、配备消防器材并设专人看火，动火后还要检查余火；仅安排一人值守而无清除可燃物和器材不符合要求，动火后立即离开易引发复燃，选择大风时段动火反而增加飞火危险。"},{"id":298,"type":"single","stem":"内河船舶在狭窄航道与来船会遇，本船为下行船且航道右侧有浅滩，正确的避让做法是","options":["适当减速并靠航道左侧让出深水一侧","保持原速并靠浅滩一侧通过","加速抢在来船前通过狭窄段","鸣放两长声要求来船让路"],"answer":[0],"explanation":"知识点为狭窄航道会遇避让原则。下行船在右侧有浅滩时应减速并靠左侧深水一侧让出通道，避免搁浅并便于会遇；靠浅滩一侧易触底，加速抢行和鸣两长声要求他船让路都不符合安全会让要求。"},{"id":299,"type":"multi","stem":"内河船舶在航行中发现船舶进水，值班船员采取的措施中正确的有","options":["立即发出进水警报并报告船长","迅速查明进水部位和进水量","启动排水泵并关闭相关水密门窗","为减轻重量将货物直接抛入江中","继续按原航速航行至目的港再处理"],"answer":[0,1,2],"explanation":"知识点为船舶进水应急反应。发现进水应立即报警报告、查明部位和水量、启动排水并关闭水密门窗以控制进水；随意抛货可能污染水域且未经船长决策，继续原速航行会加剧进水和危险。"},{"id":300,"type":"multi","stem":"某内河二等船舶在能见度不足500米的雾航中，驾驶员开启雷达、VHF并指派瞭望人员后，下列哪些处置符合内河避碰与值班要求","options":["用VHF发布本船动态并加强与来船联系","鸣放雾号并派专人守听VHF","必要时选择安全水域锚泊等雾散","凭雷达物标回波直接维持原速航行","关闭航行灯以防灯光在雾中形成光晕"],"answer":[0,1,2],"explanation":"知识点：内河雾航时的避碰与值班要求，核心是保持正规瞭望、使用声响信号、控制航速并在必要时择地锚泊。正确项0：VHF发布本船动态并联系来船，有助于双方协调避让，是雾航常用措施；正确项1：鸣放雾号并专人守听VHF，既满足能见度不良时的声响信号要求，又保持通信值守；正确项2：必要时选择安全水域锚泊等雾散，是在能见度极差、继续航行风险大时的正确选择。错误项3：凭雷达物标回波直接维持原速航行，错在雷达只是助航设备，不能替代视觉瞭望，且雾航必须减速；错误项4：关闭航行灯以防灯光在雾中形成光晕，错在雾航仍应按规定显示号灯，不能以光晕为由擅自关闭。"}]}