查看所有试题
- Aluminum pistons have () coefficient of thermal expansion compared with those of cast iron.船舶动力装置基本性能指标中的单位重量是指()。Ⅰ.主机单位有效功率的主机总重量;Ⅱ.主机单位有效功率的动力装置
- An electrically driven automatically operating auxiliary blower is provided for slow speed and () of a low speed diesel engine.船上吊缸检修一般不必()。柴油机各道主轴承下瓦磨损不同,使曲轴轴线状态产
- All three systems have the ports () to swirl the incoming air and direct it in the appropriate path.在有充分氧气存在时,烟垢的可燃成分在高温下自由蒸发,被火花或火焰点燃,在废气锅炉烟道内保持小范围和有
- After the engine is warned, we should() the turning gear before starting up the engine.水润滑艉轴承填料函中的填料为()。It is very necessary that each cylinder () before the charged air is compre
- Among the rings of a piston the () one is subjected to the greatest load and temperature.不允许柴油机排气恶化,防止锅炉烟垢沉积,其措施是()。当气缸内径增量超标时,应选用()进行修理。Ⅰ.镀铬;Ⅱ.镀铁;
- Administrations should bear in mind the significance of () in maintaining safety of life and property at sea and in preventing marine pollution.可靠度将可靠性具体化、定量化,不能采用的是()。船舶动
- A: Please tell me the specifications and quantity.B: ()Pistons of marine medium speed diesel engines may be made of () in order to keep the weight down for balancing purpose at high speed.The cyli
- After ensuring that the () is correct the bearing clearance should be checked.舵系校中检测的项目中()是错误的。A variable pitch propeller is made () a boss with separate blades mounted into it.Th
- A-frames are mounted on the bed plate and support () and cylinder block.在有充分氧气存在时,烟垢的可燃成分在高温下自由蒸发,被火花或火焰点燃,在废气锅炉烟道内保持小范围和有限的火源,称为()。换新十字头
- Acid solution() in the system can be tested from time to time by putting some on to a piece of lime.()时应对增压器转子进行动平衡试验。相邻轴同轴,其连接法兰处偏中值为()。中间轴承的工作轴颈一般较
- After "F.W.E" is given, the air system is shut down, the () gear put in, all drains and indicator cocks opened, and the cooling water kept running.桨叶经焊补修理后,为保证焊补质量应进行()等处理。Ⅰ.
- According to the way the energy of the exhaust gases is utilized, pressure-charging can be divided into two main systems, namely, the constant-pressure system and ().MANB&W5S60型船用柴油机气缸套
- A-frames and cylinder block is held together by () to form a rigid structure.船舶动力装置的管路系统,按用途不同可分为()类,即()。故障率λ(t)是针对到时刻t尚能正常工作的产品数而言的;().Ⅱ.密度函
- Adjust () by means of lead wire.柴油机进行横向校中只适用于()柴油机。Smaller engines can be made more rigid than large ones and may not have ().The period of valve overlap is when ().Which of t
- Additives () protective layers on metal surfaces guarding them against corrosion.气缸套内圆表面采用()加工,是防止拉缸事故的工艺措施之一。Ⅰ.珩磨;Ⅱ.振动;Ⅲ.机械;Ⅳ.波纹;Ⅴ.磨削。涡轮壳体局部腐蚀较重
- About half an hour before the engine is required, cooling water at () must be circulated.废气锅炉出口排烟温度t2不应低于露点,为了最大限度利用排气余热,在标定工况下,t2=露点+△t(℃),式中△t不应小于()℃.
- After fitting back in place the gear wheels, dont forget () them.针阀体的喷孔磨损后使孔径增大()时需要换新针阀体。消除螺旋桨鸣音的方法是()。The hot expanding gas rotates the blades of the exhaust
- A high temperature alarm or () which will melt is used to guard against the explosion of compressor air pipelines.现代柴油机为使与其匹配的废气锅炉被设计得更加高效,应包括()。Ⅰ.利用大的受热面;Ⅱ.锅
- 已知某船排水量为2O000t,主机有效功率为10O00kW,主机重量为350t,动力装置总重量为8O0t,则该船主机单位重量为()kg/kW。劣质渣油中含有(),使用中使烟灰增加且具有粘性,是烟灰发生沉积的重要原因()。Ⅰ.灰分;Ⅱ.残
- A level gauge for a tank is to ().体现主机紧急倒车性能的指标是()。The operating diesel generators will have their exhaust temperatures, cooling water and lubricating oil temperatures and pressures
- A gudgeon pin in a trunk piston may be free to float and rotate, with () to limit axial movement.在检查()的连杆大端轴承螺栓时,必须测量螺栓的拉伸长度。The lubricating system for the cylinder walls
- A hot air start pipe indicates that there is ().航行中一旦发现增压器振动,则首先应该()。目前钢质海船建造时安装的轴系广泛采用()。铁梨木轴承产生()时应予以部分或全部换新。舵系中心线与轴系中心线应
- A single piece() fitted with bronze rings guides the piston in the cylinder liner.在船上拆卸下列中、低速柴油机的螺栓时可能使用液压拉伸工具()。Ⅰ.底脚螺栓;Ⅱ.贯穿螺栓;Ⅲ.气缸盖螺栓;Ⅳ.主轴承螺栓;Ⅴ.
- A governor automatically controls engine speed by regulating ().串联系统的部件数目n与工作时间t都影响系统的可靠性()。Ⅰ.串联部件越多,系统可靠性越差;Ⅱ.工作时间越长,系统的可靠性越差艉轴密封装置的橡胶
- A heater in the circuit facilitates warning of the engine prior to () by circulating hot water.船舶动力装置的管路系统,按用途不同可分为()类,即()。大量产品的故障率随时间变化的规律曲线[λ(t)-t)]
- A lubricant often has to perform many duties in any situation, in addition to its fundamental job of ().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
- A main bearing consists of two shells which are secured by means of studs and ().采用尺寸选配法修理柱塞偶件或针阀偶件时,下列正确说法是()。It is very important that each cylinder should be () sca
- A separate piston cooling system is used to limit any contamination () piston cooling glands() the piston cooling system only.船舶动力装置往往以推进装置的类型进行分类,可分为()。Here some oil in
- A variable pitch propeller is made () a boss with separate blades mounted into it.对筒状活塞式柴油机,在未装活塞环的条件下,活塞位于近上、下止点位置时,活塞裙部与气缸内孔单边最小间隙应不小于()。用液
- A distance piece, with ground faces, may be interposed between the rod and the bearing housing, its thickness being chosen to ensure the correct ().某些新型大型低速柴油机的气缸盖上,设有用来拆卸缸盖
- 桨叶上同一半径截面上的局部螺距的算术平均值称为该截面的()螺距。Excessive alkalinity of the water in an auxiliary boiler can cause ().总
截面#
平均
桨叶caustic embrittlement of the boiler metal#
aci
- A distance piece, with ground faces, known as a compression plate, may be interposed between the rod and the beating housing, its thickness being chosen to ensure the correct ().早期故障是在使用开始
- 液压拉伸器是利用油压使螺栓()后轻易地上紧或松脱螺栓。一般情况下,要求针阀的锥角较阀座的锥角大()。按轴承允许负荷校中时,下述正确的是()。船轴腐蚀主要发生在()。The indications of a scavenge fire are
- 保证柴油机运动部件与固定件的准确相对位置,实质上是要()。对于质量分布不在同一平面内,轴向长度较大的回转件,其平衡程度用()表示。Storage batteries on T-Boats must be located().配合间隙符合要求
保证两
- A number of cylinder liners are enclosed in one cast iron casing to form a ().由于船舶的特殊性,导致了可靠性研究方法,如()。Ⅰ.15钢;Ⅱ.45钢;Ⅲ.20Cr;Ⅳ.40Cr;Ⅴ.35CrMo。测量轴系中心线同轴度偏差,可采用
- () or air venting arrangement is fitted to the fuel supply passage.6250型船用柴油机气缸套最大内径增量为1.5mm,则最大缸径为()。当柴油机气缸套产生较大拉痕、擦伤、磨台和过度磨损时,应拆下送厂采用()进
- () neutralizes the acid conditions and() cleanses the rings and grooves.操舵轻快、航向失控的原因可能是()。Ⅰ.舵承配合间隙过大;Ⅱ.舵承损坏;Ⅲ.舵叶丢失;Ⅳ.舵杆折断;Ⅴ.舵承的摩擦力小。Failure of fue
- A diesel engines crankcase oil level is found to be too high√ You should suspect that ().废气涡轮增压器使柴油机的功率增加一倍,而重量只增加()。Sediment collects in a tubular purifier ().The cast
- () the engines, the diesel engine is() used engine on board.可靠性对船舶动力装置具有特别重要的意义,可靠性不足会()。废气锅炉窄点越(),锅炉受热面就越(),藜发量越()。目前国内外均以(S+D)/2为
- () for the camshaft gear train is taken from a spur gear which for a six cylinder engine is at the coupling end.指出下述哪一项不是船舶动力装置的重量性能指标()。超级汽轮发电系统(STG)是废热利用联