[单选题]Additives （） protective layers on metal surfaces guarding them against corrosion.A . damageB . formC . dissolveD . contaminate
[单选题]桨叶平均螺距为桨叶上各半径截面的（）的算术平均值。A . 局部螺距B . 截面螺距C . 总平均螺距D . 平均螺距
[单选题]（） or air venting arrangement is fitted to the fuel supply passage.A . An air pumpB . A compressorC . A fuel pumpD . A priming
[单选题]舵杆上（）的纵向裂纹可焊补修理。A . 长度＜1/4公称直径、深度＜10%公称直径B . 长度＜1/5公称直径、深度＜10%公称直径C . 数量不超过2条且不在同一条直线上D . 数量不超过4条
[单选题]依螺旋桨桨叶上某半径截面上的局部螺距可计算出（）。A . 桨叶螺距B . 截面螺距C . 总平均螺距D . 部分螺距
[单选题]（） providing lubricating films, oil used in marine diesel engines have to remove heat from oil cooled piston.A . Except forB . BesideC . ExceptD . In addition to
[单选题]（） usually helps to induce air movement to assist combustion.A . Cylinder coverB . Main bearingC . The exhaust valveD . The piston movement
[单选题]舵系中心线与轴系中心线应该（）。A . 垂直B . 相交C . 平行D . 重合
[单选题]At least （） cylinders in four-stroke engine will be configured to ensure that the engine can be started with the crankshaft at whatever position.A . 6B . 2C . 12D . 8
[单选题]（） at the end of the distribution pipe ensures that adequate pressure is maintained by the pump.A . A relief valveB . An alarmC . A pressure gaugeD . A non-maim valve
[问答题] 如何对气缸盖裂纹进行修理？
[单选题]（） is used for cylinder and cylinder head, the salt water is used for cooling the lubricating oil, the fresh water in the coolers and the charging air in the air cooler.A . The fuel oilB . The lube oilC . The sea waterD . The fresh water
[问答题] 如何对活塞杆填料函进行检修？
[单选题]舵系中心线与轴系中心线应相交，其位置度偏差不得超过（）m（L为船长，m）。A . 0.001L1/3B . 0.01L1/3C . 0.1L1/3D . L1/3
[问答题] 怎样防止曲柄箱爆炸？
[单选题]螺旋桨桨叶面上的B区是指（）的区域和A区两侧边缘、吸力面0.7R以内范围。A . 0.3～0.5RB . 0.4～0.7RC . 0.5～0.8RD . 0.6～0.9R
[单选题]（） device is provided to prevent starting air from being admitted to the cylinder before the reversing is completed.A . An automaticB . A transmissionC . A self-regulatingD . An interlocking
[单选题]A-frames are mounted on the bed plate and support （） and cylinder block.A . the main bearingB . the cylinder coverC . the entablatureD . the sum
[单选题]转舵不准，舵角不正可能是（）。A . 舵杆折断B . 舵叶进水C . 舵杆变形D . 舵承间隙过小
[单选题]A high temperature alarm or （） which will melt is used to guard against the explosion of compressor air pipelines.A . a flame trapB . a relief valveC . a fusible plugD . a bursting ca
[问答题] 如何防止柴油机拉缸？
[单选题]航行中在舵机工作正常的情况下，舵沉重的原因可能是（）。A . 舵杆变形B . 舵承损坏C . 舵系安装不良D . 舵杆折断
[问答题] 对偶件的磨损怎样检验？
[问答题] 船舶开航前的备车应做哪些工作？
[单选题]静平衡试验后，较轻桨叶上的挂重大于允许值，则应铲去（）附近金属。A . 较重桨叶叶背边缘B . 较重桨叶叶面边缘C . 较轻桨叶叶背边缘D . 较轻桨叶叶面边缘
[单选题]加热温度在（）以下进行的校正为冷态校正。A . 室温B . 0℃C . 150℃D . 250℃
[单选题]反映舵杆轴颈磨损的指标有（）。A . 圆度、圆柱度B . 圆柱度、椭圆度C . 椭圆度、锥度D . 锥度、圆柱度
[单选题]舵系振动的原因可能是（）。A . 舵承间隙过小B . 舵承间隙过大C . 舵杆变形D . 舵杆折断
[单选题]A diesel engines crankcase oil level is found to be too high√ You should suspect that （）.A . the engine was over filledB . there might be a fuel leakC . there might be a water leakD . all of the above