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- () water is more expensive than fresh water It has high specific heat and low viscosity.在高增压柴油机上,排气阀阀盘的温度可达()℃。轴系理论中心线是()的定位安装基准。轴系若按直线校中,采用的校中工
- A charge of fresh air is drawn into the engine cylinder and then () by the moving piston() very high pressure.吊缸检修完毕后,发现零件漏装时应()。柴油机横向校中是指在()方向上活塞运动部件与固定
- () providing lubricating films, oil used in marine diesel engines have to remove heat from oil cooled piston.由于船舶的特殊性,使动力装置的可靠性更为重要和复杂。它与下列因素有关()。Ⅰ.各组成设备的可
- A common trouble with the fuel pump plunger or fuel valve spindle is ().目前所用燃油的排气露点一般在()℃范围.相同工作条件下,回油孔式喷油泵柱塞与回油阀式喷油泵柱塞相比,发生穴蚀的可能性()。带有匙形
- A diesel engine is similar to a gasoline engine except that the former has no ().关于废气锅炉烟垢着火温度()。Ⅰ.烟垢潜在着火温度一般为300—400℃;Ⅱ.存在未燃烧的燃油时烟垢着火温度约为150℃;Ⅲ.极端情况
- () usually helps to induce air movement to assist combustion.当十字头式柴油机缸径<700mm时,在未装活塞环的条件下,活塞位于近上、下止点位置时,活塞裙部减磨环与气缸内孔单边最小间隙应不小于()。短轴系具
- () supplies pilot air to control the cylinder air start valves.从液压拉伸器的结构上看,当活塞的升程超过了其“最大升程”时,会出现()现象。增压器转子动平衡试验合格之后()。The compressed air is admitte
- A common trouble with the fuel pump plungers or fuel valve spindle is ().缸盖底面裂纹一般多产生在(),即有应力集中的部位。Ⅰ.阀孔周围;Ⅱ.阀孔边缘;Ⅲ.阀孔之间;Ⅳ.阀孔座面;Ⅴ.底面圆周方向。二冲程柴油机
- () are mounted on and bolted to the bed-plate cross girders.液压拉伸器的液系统中应使用纯净的()作为工作用油。Ⅰ.液压油;Ⅱ.润滑油;Ⅲ.高级润滑油;Ⅳ.气缸油;Ⅴ.透平油。柴油机未装连杆状态下,盘车一周可测
- () is fully floating in both connecting rod small end and the piston skirt.在早期故障内故障率比较(),但它随时间的推移而()。为了提高系统的可靠性,除选用优质廉价的部件外,还要力求使系统()。Ⅰ.所用部
- () of the A-frames there is a strong cast iron frame called the scavenging air box.利用液压拉伸器上紧贯穿螺栓时,如果拉伸器的油压仅达到上紧压力的50%时泄油孔就出现漏油现象,这种现象可能是()。拆下来的
- () pistons have low inertia and high coefficient of thermal expansion.水润滑式艉轴的()包覆铜套,以防止腐蚀。When the fuel oil is burning in the combustion chamber, it ().Cast iron
Cast steel
Forg
- () is not properly set thus causing either advanced or retarded firing.由于船舶的特殊性,使动力装置的可靠性更为重要和复杂。它与下列因素有关()。Ⅰ.各组成设备的可靠性;Ⅱ.各组成设备的维修性;Ⅲ.管理人员
- () at the end of the distribution pipe ensures that adequate pressure is maintained by the pump.在检查和调整主机回油阀调节式喷油泵的供油量均匀性时,对始终点调节式喷油泵,可通过转动进回油阀阀杆下的调节
- () is used for washing and drinking.燃气动力装置在海船上使用最多的是()。赛龙艉轴承材料的缺点是()。Ⅰ.弹性低;Ⅱ.导热性差;Ⅲ.不耐高温;Ⅳ.不耐磨;Ⅴ.寿命低。铁梨木艉轴承和层压胶木艉轴承的极限间隙可近
- () the cylinder will contain a great weight of air and will be capable of burning a great quantity of fuel.舵系运动件的同轴度检验采用()。The engine has one or two group of fuel pumps, depending up
- () the supercharge pressure is, () power an engine develops.不属于吊缸检修的技术要求有()。轴系应用合理校中原理校中时,普遍采用()定位,然后用()验证。轴与桨法兰连接者或无键连接者,检验间隔期为(
- () is made of a boss with separated blades mounted into it.某曲柄的两主轴承在水平平面内位置偏右,曲轴轴线呈右拱形,则其Δ-()。根据轴系的结构特点,以轴承负荷、轴段内的应力、弯矩、转角等为约束条件,通过
- () provide the water to the pistons.The diameter of the crank-pins should be measured with a ().The diameters of the crankpins should be measured using ().Pneumatic pipes
Hydraulic pipes
Telesco
- () allows for expansion and water make up in the water cooling system.吊缸时,第二阶段的工作是()。吊缸主机检修时,应当(),以防止伤人和损坏机件。在更换液压拉伸器的密封环时,应尽量使用()将活塞和油缸
- () is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.柴油机排气系统的背压与()。Ⅰ.废气流速的平方成正比;Ⅱ.与管径的4次方成反比二冲程柴油机气缸套产生穿透
- () are formed by abrasive particles entering the bearing and scoring the shaft.每海里燃油消耗量是指船舶每航行1nmile动力装置所消耗的燃油总量,它考虑了().Ⅰ.动力装置本身的性能;Ⅱ.船舶的航行性能舵杆上
- () rods are not in proper condition so that too much fuel is supplied to the corresponding cylinder.并联连接系统的不可靠度()系统中任一并联部件的不可靠度。底脚螺栓的作用是将()牢牢地固定在一起。Ⅰ.
- () of an engine crankshaft can be detected by measuring deflections of crank webs for each unit of the engine.为了满足船舶续航力的要求,船上必须设有()。船舶有效功率是指船舶航行时()的功率。中间轴
- () should not undertake any task which will interfere with the supervision duties relating to the main machinery and associated equipment.平板形舵用于()。Low compression results from ().Proper a
- () is the removal of exhaust gases by blowing in fresh air.废气锅炉烟垢着火的热量主要传导给(),使锅炉系统不能正常工作,甚至损坏锅炉。油润滑艉轴承Simplex密封装置的损坏主要发生在()上。操舵轻松,航向
- The bearing shell generally has () for location and oil grooves round the center of its axial length.防止增压器涡轮端壳体腐蚀的方法是()。如果两根中间轴连接法兰的位置处于两轴承间距的中间,则轴系会出
- “Stand by an engine” means ()可靠性定义中所述及的“规定的条件”,包括()。Ⅰ.环境温度、压力、湿度;Ⅱ.振动;Ⅲ.承受的负荷吊缸主机检修时,应当(),以防止伤人和损坏机件。填料函式艉轴密封装置要求换新填料安装
- () 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.() supplies pilot air to co
- 摇动兆欧表后,各接线柱之间不能(),以免损坏。对现代船舶而言,“轮机”与船舶动力装置”两词的含义是()。甲板机械是为保证()的机械设备。An increase in load on a diesel engine results in () of speed of the
- () are commonly used in mechanical-hydraulic governor(调速器) to sense engine speeds.造成产品出现早期故障期的原因()。Ⅰ.设计上的缺陷;Ⅱ.制造上的缺陷;Ⅲ.使用中磨合不合适对于不可修产品的平均寿命,是
- () fuel oils () lubricating oils require treatment before passing to the engine.气缸盖是柴油机的()和燃烧室的组成部分。局部螺距等于()(ΔL为螺距规量杆的升程α为螺距规水平杆转过的角度)。Compresse
- () are generally formed in the frame of the both in-line and Vee engines to give maintenance access to the crankshaft main and connecting rod large end bearing.平衡精度的等级是按照()来划分的。轴系
- GSK983进行DNC方式操作时,方法是进入()发动机换向所需的时间是指()。船舶动力装置的主要耗能设备是()。Ⅰ.螺旋桨;Ⅱ.主机、发电机和辅助锅炉;Ⅲ.空气压缩机No specific period is given for the renewal of the
- 二冲程柴油机停增压器运转时使用电动鼓风机供气,此时柴油机可达到标定功率的()。在检查主机回油阀调节式喷油泵的停油位置时,应将主机的燃油手柄置于()位置。船轴工作轴颈磨损后,经测量表明()超标准时应予以修
- A ()is the foundation of the engine, without the support of which the shaft alignment in particular, and engine structure as a whole, would inevitably be lost.最早用于海船上的蒸汽动力装置是()。
- “Before disconnecting the oil pipe, would you flush the oil retained in the pipe?” asked the oil barge owner ()废气锅炉废气出口温度不低于155℃,锅炉进口给水循环温度,对有预热器的应高于()℃,否则凝结的
- () device is provided to prevent starting air from being admitted to the cylinder before the reversing is completed.低速柴油机的最低稳定转速不高于标定转速的()%。动力装置有效热效率是指()。Ⅰ.每小
- What is the speed of the crankshaft in a four-stroke/cycle engine when the camshaft is turning at 750 rpm?()在重新组装回油孔调节式喷油泵时,为了保证齿条刻度指示的零位与柱塞套筒的实际零位(油泵柱塞直
- () is sometimes used for piston cooling since leaks into the crankcase would not cause problems.并联部件的数量越多,每一并联部件对系统可靠性提高所起的作用越(),所以一般并联()个部件为宜。某曲柄的两