[单选题]（） water is more expensive than fresh water It has high specific heat and low viscosity.A . DistilledB . DistillingC . BoilingD . Boiled
[单选题]增压四冲程柴油机当增压器损坏需停增压器长期运转时为了改善柴油机的工作状况，可做的调整工作是（）。A .适当增大气阀重叠角B .适当增大喷油提前角C .适当提高压缩比D .B＋C
[单选题]赛龙是由高性能热固性树脂合成的均质聚合物，具有（）等特点。Ⅰ.弹性好；Ⅱ.耐磨性好；Ⅲ.耐蚀性好；Ⅳ.导热性好；Ⅴ.耐高温。A . Ⅱ＋ⅢB . Ⅰ＋Ⅱ＋Ⅳ＋ⅤC . Ⅲ＋Ⅳ＋ⅤD . Ⅰ＋Ⅱ＋Ⅲ
[单选题]The bearing shell generally has （） for location and oil grooves round the center of its axial length.A . tipsB . tagsC . lipsD . key
[单选题]A diesel engine is similar to a gasoline engine except that the former has no （）.A . cross-headB . cylinderC . connecting rodD . spark plug
[问答题] 造成增压器振动的原因有哪些？
[单选题]螺旋桨0.4R以内的缺陷（）修理。A . 可焊补B . 不可焊补C . 一般不可焊补D . 可采用喷焊
[单选题]舵系运动件的同轴度检验采用（）。A . 平台测量法B . 拉线法C . 光学仪器法D . 不一定
[单选题]增压四冲程柴油机当停增压器运转时，可做的调整工作是（）。A . 适当增大气阀重叠角B . 适当增大气阀重叠角C . 适当增大气阀间隙D . 适当减小气阀间隙
[问答题] 简述正确测量螺旋桨螺距的步骤。
[单选题]Administrations should bear in mind the significance of （） in maintaining safety of life and property at sea and in preventing marine pollution.A . advanced nautical equipmentB . advanced performance main enginesC . emergency equipmentD . communicati
[单选题]（） the cylinder will contain a great weight of air and will be capable of burning a great quantity of fuel.A . At the beginning of the compression strokeB . At the beginning of the suction strokeC . At the end of the working strokeD . At the end of t
[单选题]A level gauge for a tank is to （）.A . give the pressureB . give the contentsC . give the shape of the tankD . give the accuracy level
[单选题]（） should not undertake any task which will interfere with the supervision duties relating to the main machinery and associated equipment.A . The watch keeping personnelB . The chief engineerC . The person on a bunker bargeD . Any of the above
[单选题]舵杆表面的裂纹应采用（）检查。A . 超声波探伤B . 磁力探伤C . 观察法D . 荧光探伤
[单选题]About half an hour before the engine is required, cooling water at （） must be circulated.A . more than the working temperatureB . less than the working temperatureC . the working temperatureD . the same as the surrounding temperature
[单选题]（） supplies pilot air to control the cylinder air start valves.A . An air compressorB . An indicator cockC . An air distributorD . A safety valve
[单选题]双桨双舵船舶，两舵系中心线的前后定位偏差与相互位置偏差均不得超过（）。A . 0～5mmB . 5～10mmC . 10～15mmD . 15～20mm
[单选题]GSK983进行DNC方式操作时，方法是进入（）A . 通讯方式，任意选择程序号输入B . 通讯方式，选择100号程序输入C . 自动方式，选择100号程序输入D . 自动方式，任意选择程序号输入
[问答题] 二冲程柴油机停增压器运行的措施？
[单选题]（） are mounted on and bolted to the bed-plate cross girders.A . The crankshaftB . The crankcaseC . The guide-waysD . The frame
[单选题]What is the speed of the crankshaft in a four-stroke/cycle engine when the camshaft is turning at 750 rpm?（）A . 375 RPMB . 500 RPMC . 750 RPMD . 1500 RPM
[单选题]After fitting back in place the gear wheels, dont forget （） them.A . to greaseB . greasingC . oilingD . lubricating
[单选题]截面螺距是桨叶上同一半径截面上的（）的算术平均值。A . 局部螺距B . 桨叶螺距C . 总平均螺距D . 部分螺距
[单选题]按舵的旋转轴线的位置不同将舵系分为（）种。A .2B .3C .4D .5
[单选题]（） is fully floating in both connecting rod small end and the piston skirt.A . The piston rodB . The cross head pinC . The gudgeon pinD . The crank-pi
[单选题]在下述哪种情况下主机应备车（）。Ⅰ.过运河；Ⅱ.主要设备发生故障；Ⅲ.特殊水域；Ⅳ.特殊气象条件；Ⅴ.人员有伤亡A . Ⅰ+Ⅱ+Ⅲ+ⅤB . Ⅰ+Ⅲ+Ⅳ+ⅤC . Ⅰ+Ⅲ+ⅣD . Ⅰ+Ⅱ+Ⅲ+Ⅳ
[问答题] 柴油机敲缸时的应急处理措施？
[单选题]舵系中心线与轴系中心线位置度检验方法采用（）。A . 专用量具B . 光学仪器法C . 专用量具或光学仪器法D . 拉线法
[单选题]螺旋桨桨叶面上的A区是指（）以内的区域。A .0.4RB .0.5RC .0.6RD .0.7R