48期3000KW及以上二三管轮船舶辅机试卷
船员考试题库-船舶动力装置(3000kW及以上船舶轮机长)

船员考试题库中华人民共和国海事局适任培训大纲熟悉训练12科目:船舶动力装置(750kW及以上船舶轮机长)适用对象:3000kW及以上船舶轮机长1.为了保证船用四冲程柴油机曲轴停在任何位置均能可靠地用压缩空气起动,则最少气缸数应不少于______。
A. 四个B. 五个C. 六个D. 九个C解析:对于船舶主机而言,必须保证曲轴在任何位置时都能起动,即柴油机的曲轴在任何位置时至少有一个气缸处于起动位置。
二冲程柴油机的气缸数不应少于4个,四冲程柴油机的气缸数不应少于6个,因为二冲程柴油机起动阀的延续开启角度不超过120°,故只有当曲柄夹角小于120°时,才能保证各气缸必有一个处于起动位置。
显然,相邻曲柄夹角小于120°的气缸数至少为4个,同理,四冲程柴油机应为6个。
若气缸数少于上述数值,则起动前必须盘车,使某缸正好处于膨胀行程开始后的某一时刻。
2.对船舶倒车工况特性曲线理解错误的是______。
A. 船速越低,特性曲线越靠近坐标原点B. 系泊工况时,特性曲线通过坐标原点C. n正=n倒,特性曲线通过并对称于坐标原点D. 系泊工况时,特性曲线不对称于坐标原点C船舶倒车工况特性曲线不对称于坐标原点。
3.DCC20或K-CHIEF500的延伸报警装置WCU的故障诊断可通过______来观察。
A. DPUB. ROSC. 运行指示灯D. LOSB4.通常轮机人员防止大型低速柴油机燃烧室零件产生高温腐蚀的措施是______。
A. 燃用轻柴油B. 选用含钒(V)、钠(Na)少的燃油C. 选用耐蚀材料D. 加强润滑B5.当船舶装载量减少时,主机按全负荷工作特性工作时,以下有关船、机、桨变化关系的说法正确的是______。
①船舶进程比λp减小①螺旋桨特性曲线变得平坦①主机气缸的热负荷没有超过额定值A. ①①B. ①①C. ①①D. ①①①C6.在船舶主机自动控制装置中,如出现三次重复起动仍起动失败,遥控系统应能______。
船员考试题库-船舶动力装置(3000kW及以上船舶轮机长)

船员考试题库中华人民共和国海事局适任培训大纲熟悉训练19科目:船舶动力装置适用对象:3000kW及以上船舶轮机长1.船舶机械设备的零部件断裂大都是______。
A. 疲劳断裂B. 塑性变形后断裂C. 脆性断裂D. 变形A2.热疲劳是指零件______引起的损坏或破坏现象。
A. 受交变热应力长期作用B. 受交变应力长期作用C. 受交变机械应力长期作用D. 受交变热应力或受交变机械应力长期作用A3.零部件产生热应力存在两个必要的条件,是______。
①温度循环变化②零件受热变形受到约束③零件设计结构复杂④材料属性A. ①②B. ③④C. ①③D. ②④A解析:热疲劳是零件在循环热应力反复作用下产生的疲劳破坏。
循环热应力是零件受到循环变化的温度作用引起的。
因此,产生热疲劳必满足两个条件:一是温度循环变化,二是零件热变形受到约束。
4.柴油机气缸套与活塞环工作表面间油膜变薄,可能是由于______等因素造成。
①润滑油供应不足②活塞运动装置对中不良③冷却不良④长时间运转A. ①②④B. ①④C. ①②③④D. ①②③D解析:柴油机拉缸事故的根本原因是气缸套与活塞环工作表面间的油膜变薄或遭到破坏所致。
当油膜变薄或局部破坏失去油膜时,使气缸套和活塞环配合表面的金属直接接触,发生黏着磨损,进一步发展和恶化即形成严重的拉缸事故。
使润滑油膜变薄和破坏的因素较多,除滑油品质不佳、供油不足或中断、气缸套冷却不良缸壁过热、超负荷等因素外,柴油机制造与安装精度和使用中的精度降低也是不容忽视的重要原因。
5.柴油机气缸套产生有一定间隔的少量纵向裂纹时,应采用______扣合法修理,效果较好。
A. 金属B. 强固C. 强密D. 加强C解析:航行中气缸套内圆表面产生有一定间隔的少量纵向裂纹时,可采用波浪键和密封螺丝扣合法修理,效果较好。
波浪键和密封螺丝扣合法属于强密扣合法。
6.燃用劣质燃油时易引发柴油机拉缸的主要原因是燃用劣质燃油时______。
船员考试题库-船舶动力装置(3000kW及以上船舶轮机长) (2)

船员考试题库中华人民共和国海事局适任培训大纲熟悉训练16科目:船舶动力装置(750kW及以上船舶轮机长)适用对象:3000kW及以上船舶轮机长1.采用蒸汽加热的燃油雾化加热器,燃油温度始终无法达到设定温度,可能的原因是______。
①燃油加热温度设定机构故障①雾化加热器结垢严重①蒸汽加热管系旁通阀故障①蒸汽高流速太大导致加热时间太短A. ①①B. ①①①①C. ①①①D. ①①①D2.两台发电机并联运行,若两功率表指示相同,而两功率因数表指示相差较大,这说明______。
A. 运行状态良好B. 有功分配异常C. 无功分配异常D. 电网局部短路C解析:两功率表指示相同,而两功率因数表指示相差较大,这说明有功功率相等,无功功率不等。
3.在气动主机遥控系统的程序负荷回路中,若单向节流阀3节流孔堵塞,则可能产生的现象为______。
A. 主机按加速速率限制速度加速到海上全速B. 主机只能加速到额定转速70%的转速C. 主机只能加速到额定转速30%的转速D. 主机只能保持在起动供油量下运行,不能再加速B4.容积式流量传感器的测量原理是被测介质流量越大,输出的______。
A. 电脉冲频率越高B. 电脉冲频率越低C. 电压越高D. 电压越低A解析:容积式流量传感器检测齿轮在压力差的作用下,产生作用力矩而转动,通过的流量越大,齿轮转速越快。
齿轮转动经轴转2上端的永久磁铁3驱动干簧继电器4,使其触点闭合或断开,从而输出反映流量大小的电脉冲信号频率越高。
5.在柴油主机进行紧急刹车操纵中,避免在刹车中同时向气缸喷油的连锁设备是______。
A. 换向连锁B. 盘车机连锁C. 车钟连锁D. 运转方向连锁D6.锅炉本体上的水位计显示水位正常,但是安保装置出现报警显示水位过低无法点炉,可能的原因是______。
①锅炉本体上的水位计出现虚假水位;①水位差压变送器没有按照要求进行校准;①锅炉蒸汽压力过低。
A. ①①B. ①①C. ①①D. ①①①B7.在主机遥控系统中,采用增加起动供油量重起动方案的不足之处是______。
3000kW 及以上船舶二三管轮 电气与自动化 04

A. 熔断器
B. 热继电器
C. 接触器与起停按钮相配合
D. 手动刀闸开关
31. 航行灯的供电要求规定每个航行灯都______供电。
A. 统一由一路
B. 由主配电板和应急配电板两路
C. 由主配电板和临时应急配电板两路
D. 由应急配电板和临时应急配电板两路
32. 最为理想的铅蓄电池充电方法是______。
C. 烟雾透光性 / 烟雾吸收α射线
D. 烟雾顺磁性 / 烟雾逆磁性
及迁移方向为______。
A. -20℃,负迁移
B. -20℃,正迁移
C. 20℃,负迁移
D. 20℃,正迁移
56. 感烟式火警探测器有两种,一种基于______原理,另一种基于______原理。
A. 烟雾浓度不同透光程度不同 / 烟雾颗粒能吸收空气中被电离的离子
B. 烟雾导电随浓度变化 / 烟雾颗粒在磁场中磁化
A. 电力系统供电的安全性、连续性和可靠性
B. 欠压保护
C. 逆功率保护
D. 过载保护
35. 晶闸管有 A、K、G 三个引出脚,如用数字式万用表的通断档测量,出现三个脚之间均有导通现象,即
可判定______;若出现三个脚之间均没有导通现象(电阻都很大),即可判定______。
A. 晶闸管正常,晶闸管正常
53. 图示元件是______。
D. 抗干扰性强 D. 点火变压器通电
A. 节流盲室
B. 微分气室
C. 比例惯性环节
D. 比例积分环节
54. 有一台 PID 调节器,施加一个阶跃的输入信号后。其输出最后起作用的是______。
A. 比例项和积分项
B. 积分项和微分项
C. 积分项
甲类三管轮轮机管理新增试题集

41-45 3000千瓦以上(二管/三管)管理新增加的试题题以下哪种船舶不属于ISM 规则中规定的“散装船”?A、矿砂船B、兼用船C、滚装船D、煤船为保证船舱的抗沉性,货船一般采用:A、一舱制B、二舱制C、三舱制D、四舱制船舱压载水公约规定,对于使用泵入~排出方法交换压载水的船舱,泵入~排出_____于每一压载水舱容积应视为达到标准。
A、一倍B、二倍C、三倍D、四倍美国《90油污法》规定,造成油污染事故的3000总吨以下的液货船赔偿限额为每总吨1200美元,或总额_____万美元,取其大者。
A、50B、100C、200D、500目前海船上广泛使用球鼻首,关于球鼻首作用的正确论述是________。
A、增加船首强度B、建造方便C、便于靠离码头D、减少兴波阻力船规规定,对锅炉和热油加热器的检验应包括外部检验和内部检验,对锅炉进行外部检时应进行______,包括______。
A、总体检查/安全保护装置、燃油系统功能及燃油应急切断装置等B、一般性目视和查看使用记录/安全保护装置C、了解和查看使用记录/对锅炉安全阀在蒸汽压力下进行校验D、外观目视/对锅炉进行水压试验ISPS规则不适用于:A、从事国际航行的客船B、从事国际航行的500吨及以上的货船C、服务国际航行船舶的港口设施D、缔约国政府的公务船在辩认可能爆炸装置的过程中,应遵循的原则不包括:A、先观察、再询问、后动手B、先用探测仪,再使用人工方法C、先检测内部,再探测外表D、先远距离探测,再近距离辩认以下有关机舱火灾应急操作规程的说法中,不正确的是:A、轮机部全体人员立即进入应变部署岗位,服从统一指挥B、切断火场电源或停止发电机运转,起动应急消防泵灭火C、抢救人员两人一组,穿好消防衣,佩带呼吸器,做好支援通信联络工作D、必要时,停止机舱通风机、燃油泵,关闭油柜速闭阀、机舱天窗和风道挡板《SOAS公约》附则第三章对救生设备的规定,客船上所有救生艇筏应能在发出弃船信号后________。
3000KW及以上船舶大管轮主推进动力装置试题含答案

【单选】______为电子示功器需要标定的内容。
--------------------------------------------------------------------------------A.上止点位置B.电阻值C.电流值D.电容值【单选】间接传动的优点是______。
--------------------------------------------------------------------------------A.结构简单B.传动效率高C.经济性好D.机动性能提高【单选】螺旋桨的穴蚀主要发生在______。
--------------------------------------------------------------------------------A.叶背边缘B.随边C.叶面边缘D.导边【单选】当代电控喷射二冲程柴油机起动主要是由电磁阀控制______实现。
--------------------------------------------------------------------------------A.空气分配器B.主起动阀C.起动控制阀D.气缸起动阀【单选】气缸套内表面在最大燃烧压力作用下,承受的机械应力是______。
--------------------------------------------------------------------------------A.切向压应力,径向压应力B.切向拉应力,径向压应力C.切向压应力,径向拉应力D.切向拉应力,径向拉应力【单选】柴油机冷却水质应处理,这是因为水中含有______。
--------------------------------------------------------------------------------A.碱性B.酸性C.盐分D.杂质【单选】当螺旋桨的进程比λP=0时,螺旋桨推力和扭矩达到______,这相当于______工况。
船舶辅机3000kW及以上船舶二三管轮考试题目

1.船用泵基础知识船用泵基础知识下列泵中属于容积式泵的是________。
A.往复泵B.旋涡泵C.喷射泵D.离心泵答案:A2.船用泵基础知识船用泵基础知识下列泵中不属于容积式泵的是________。
A.往复泵B.螺杆泵C.水环泵D.旋涡泵答案:D3.船用泵基础知识船用泵基础知识下列泵中属于回转式容积泵的是________。
A.离心泵B.水环泵C.旋涡泵D.轴流泵答案:B4.船用泵基础知识船用泵基础知识下列泵中不属于回转式容积式泵的是________。
A.水环泵B.齿轮泵C.螺杆泵D.旋涡泵答案:D5.船用泵基础知识船用泵基础知识下列泵中属于叶轮式泵的是________。
A.齿轮泵B.叶片泵C.水环泵D.旋涡泵答案:D6.船用泵基础知识船用泵基础知识下列泵中不属于叶轮式泵的是________。
A.离心泵B.叶片泵C.旋涡泵D.轴流泵答案:B7.船用泵基础知识船用泵基础知识容积式泵是指________的泵。
A.有泵缸B.运动部件做往复运动C.运动部件做回转运动D.工作容积周期性地增减答案:D8.船用泵基础知识船用泵基础知识动力式泵是指________的泵。
A.工作容积周期性地增减B.主要靠增加液体动能而使液体能量增加C.有原动机驱动D.由工作机械附带驱动答案:B9.船用泵基础知识船用泵基础知识船上较常见的汽轮机泵是________。
A.主海水泵B.压载泵C.货油泵D.应急消防泵答案:C10.船用泵基础知识船用泵基础知识船上较常见的柴油机泵是________。
A.主海水泵B.压载泵C.货油泵D.应急消防泵答案:D11.船用泵基础知识船用泵基础知识泵的扬程是指泵________。
A.吸上高度B.排送高度C.A和BD.所排送液体在排口和吸口的能头差答案:D12.船用泵基础知识船用泵基础知识泵的扬程是指单位重液体通过泵后所增加的能量,其单位是________。
A.焦耳B.帕斯卡C.米D.瓦答案:C13.船用泵基础知识船用泵基础知识泵的扬程大,不一定________就大。
大管轮轮机英语综合(33-48期)

中华人民共和国海事局2004年第1期海船船员适任证书全国统考试题(总第33期)科目:轮机英语试卷代号:803适用对象:无限、近洋航区3000KW及以上船舶大管轮(本试卷卷面总分100分,及格分为70分,考试时间为100分钟)答题说明:请选择一个最合适的答案,并将该答案按答题卡要求,在其相应位置上用2B铅笔涂黑。
第1题至68题,每题1分,第69题至76题,每题1.5分,第77题至78题,每题10分。
一、单项选择题:1.The exhaust valve is opened at about the same time ______the air inlet ports are opened.A. beforeB. afterC. whenD. until2.Cylinder wall temperature, fuel oil sulphur, and oil passage ______.A. are interdependentB. are not interdependentC. have nothing to do with each otherD. are independent3.Acid solution ______ in the system can be tested from time to time by putting some on to a piece of lime.A. strengthB. denseC. percentageD. velocity4.Machinery driving fuel oil transfer and fuel oil service pumps must be fitted with a remote means of stopping the machinery from ______.A. within the space concernedB. outside the space concernedC. the throttle stationD. within the fire room5.Cylinder oil is a high viscosity mineral oil, with a ______machined to the anticipated sulfur content of the fuel.A. TANB. TBNC. SAND. SBN6.The tendency for lubricating oil to thin out at high temperatures and thicken at low temperatures will be characterized by a ______.A. low viscosity indexB. high viscosity indexC. high neutralization numberD. low demulsibility quality7.When considering the lowest fuel system operating temperature, ______ are important.A. specific gravity or relative densityB. open flash point and closed flash point valuesC. higher calorific and lower calorific valuesD. cloud point and pour point values8.In ______the incoming air is directed upwards, pushing the exhaust gases before it and then the exhaust gases travel down.A. loop scavengingB. cross scavengingC. uniflow scavengingD. supercharging9.______ is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.A. An air receiverB. An operating valveC. An automatic valveD. An air distributor 10.Which of the following conditions can cause above normal air temperature to develop in the intake manifold of a four-stroke/cycle, turbo-charged, diesel engine?A. Clogged air intake filters.B. Piston blow-by.C. A defective after-cooler.D. Faulty exhaust valves.11.Misalignment of an engine crankshaft can be detected by measuring______of crank webs for each unit of the engine.A. diametersB. lengthsC. deflectionsD. none of the above12.A crankshaft whose center of gravity coincides with its center line is said to be ______.A. dynamically balancedB. statically balancedC. counter balancedD. resonantly balanced 13.In a diesel engine, the main bearings are used between the ______.A. connecting rod and the crankshaftB. wrist pin and the connecting rodC. camshaft and the engine blockD. crankshaft and the engine block14.We should not start the engine unless the turning gear is ______.A. onB. disengagedC. boltedD. unscrewed15.When the exhaust ports or valves are opened, the ______begin to exhaust.A. carbon and waterB. refrigeration steamC. burnt gasesD. oil sludge16.We'd better take _____to save fuel consumption, you know it would be useless to get there earlier.A. nominal speedB. economical speedC. rated speedD. slow speed17.Shaft sealing in a centrifugal pump can be effected by ______.A. the mechanical sealB. packed stuffing boxesC. either A or BD. neither A nor B 18.Most pump manufacturers recommend that the suction piping dimension for centrifugal pumps be ______.A. one size smaller than the pump suction nozzleB. the same size as the pump suction nozzleC. one size larger than the pump suction nozzleD. installed with a short radius elbow at the pump19.The water level in a steaming auxiliary boiler will always ______.A. rise when the steam pressure is increasedB. remain constant as long as the feed pump operatesC. fall when the steam pressure is decreasedD. vary as the steam demand changes20.The concentration of total dissolved solids in the water of an auxiliary boiler can increase as a result of ______.A. seawater contaminationB. frequent surface blowsC. dissolved oxygen deaerationD. frequent bottom blows21.Sediment collects in a tubular purifier______.A. on top coverB. on sides of bowlC. in drain line on the discsD. on the discs 22.The operating water is supplied under the ______of an oil separator.A. sliding bowl bottomB. bowl hoodC. bowlD. filter units23.The bilge main is arranged to drain any watertight compartment ______ballast, oil or water tanks and to discharge the contents overboard.A. rather thanB. other thanC. in addition thatD. except for24.The oil sludge is burnt in the ______onboard. I‟ll show you the ashes.A. boilerB. main engineC. auxiliary engineD. incinerator25.When making entries in the Oil Record Book, the date, operational code, and item number shall be inserted in the appropriate columns. Furthermore, the required particulars shall be ______.A. recorded only for accidental oil dischargesB. recorded only for operations involving discharge of oily wasteC. signed by the oiler who enters them in the Oil Record BookD. recorded chronologically in the blank space26.Which bearing will carry the load on two small points diametrically opposite to each other?A. NeedleB. Tapered rollerC. RollerD. Ball27.In a general cargo crane, ______ is fitted to raise or lower the jib.A. the slewing motorB. the luffing motorC. the hoisting motorD. none of the above 28.In an electro-hydraulic steering gear system, when will the variable displacement pump be placed on stroke?A. When the helm is at any angle other than amidships.B. When the six-way valve is opened.C. When the ram relief valves lift.D. When the rudder angle is different from the position of the helm.29.With reference to rules governing steering gear, which one of the following rules is incorrect ?A. It is required that all ships are provided with two independent steering gear systems that is onemain and one auxiliary.B. The auxiliary gear could be power operated in passenger ships.C. The auxiliary gear must be of adequate strength and sufficient to steer a ship at navigablespeed.D. All moving parts of the steering gear must be guarded against any possible damage.30.A refrigeration system contaminated with moisture can be affected by ______.A. acid formationB. sludge formationC. ice in the expansion valveD. all of the above 31.A dirty intercooler on the ship service air compressor will result in ______.A. decreased compression ratioB. higher than normal power consumptionC. un-loader malfunctionD. water in the lubricating oil32.Which of the problems listed would cause the discharge temperature of an R-22 refrigeration compressor to increase?A. Thermal expansion valve frozen open.B. Suction gas heat exchanger bypassed.C. Condenser clogged or fouled.D. High pressure cutout switch inoperative. 33.Zinc rods are installed in the refrigeration system ______.A. liquid strainerB. liquid receiverC. saltwater condenserD. evaporator34.The fire pumps must be capable of delivering a total quantity of water at a defined head , not less than______ of the total bilge pumping capacity.A. one-thirdB. two-thirdsC. one-fourthD. two-fourths35.Which of the following factors will have the greatest effect on the heating load within a conditioned space?A. Solar gainB. Infiltration and ventilation airC. Occupants inside the spaceD. Entertainment equipment within the space36.On commonly used ships, if two A.C. generators are operated in parallel, the load is distributed evenly by ______.A. varying the D.C. exciter voltageB. varying the reluctance of the air gapC. regulating the speed of prime moverD. shorting out part of the armature windings 37.Which of the listed sections of an emergency switchboard is used to supply power for alarm signals under emergency conditions?A. The generator and bus transfer sectionB. The 450 volt, 60 cycle, 3 phase busC. The 120 volt, 3 phase, 60 cycle busD. The 24 volt DC bus38.Which of the following should be the FIRST step in removing a generator from parallel operation?A. Trip the generator off the switchboard.B. Turn off all electrical equipment.C. Remove the load from the 'off going' generator.D. Increase the cycles of the generator staying on the line.39.Which of the listed devices is used to measure pressure and convert it to an electrical signal?A. TransducerB. ReducerC. TransformerD. Rectifier40.An indicator on the main switchboard should show ______the emergency battery is in service or not.A. whichB. whenC. weatherD. whether41.The number of cycles per second occurring in AC voltage is known as the ______.A. phase angleB. frequencyC. wave formD. half mode42.While on watch in the engine room, you hear a continuous sounding of the general alarm. Which of the following actions should you take?A. Make an entry in the official logbook.B. Open the master control valves on the fixed CO2 system.C. Start the fire pump and check discharge pressure.D. Secure auxiliary condenser overboard discharge.43.The additional mark ______ in the Classification Certificate for Machinery represents that personnel are watching at engine assembly control station and monitoring all machinery andelectronic devices.A. BRCB. MCCC. AUT-0D. AUT-144.If the atomizer holes are enlarged beyond the maker's recommended size , the atomizer must be ______.A. repairedB. replacedC. replenishedD. repeated45.In a diesel engine, an extremely leaking exhaust valve can cause ______.A. misfiringB. pre-ignitionC. interrupted scavengingD. reduced scavenging 46.One cylinder of a diesel engine is persistently knocking and does not cease when the fuel supply to that cylinder is secured. Which of the following problems may be the cause?A. Low loading of the cylinder.B. Excessive cooling of that piston.C. Sluggish ring action on the piston.D. A mechanical defect in a working part.47.Poor combustion in a diesel engine can be caused by ______.A. high compression pressureB. low intake air temperatureC. low exhaust pressureD. high scavenge air temperature48.Any increase in the exhaust back pressure of a four-stroke/cycle diesel engine will ______.A. reduce engine horsepower outputB. aid in silencing the exhaust noiseC. increase the mean effective pressureD. contribute to effective cylinder scavenging 49.Hearing a strong noise, ______at once.A. the engine stoppedB. the engine was stoppedC. he stopped the engineD. he had stopped the engine50.Fix the fuel injector into______after repair.A. the cylinder linerB. the cylinder coverC. the cylinder jacketD. the piston 51.Lower suction pressure of a pump may be caused by ______.A. too much air in the pipe lineB. closed inlet valveC. empty tankD. leaky pipe52.Diesel engine exhaust temperatures may be used to indicate ______.A. leaking exhaust valvesB. an overloaded cylinderC. a clogged injector nozzleD. all of the above.53.The indications of a scavenge fire are excessive black smoke, ______ and peeling from scavenge trunking.A. turbo-chargers surgeB. spark seen from the drainsC. paint blisteringD. all above are right 54.It is well known that the whole power distribution of the ship‟s electrical services mainly depend on the______.A. sub-boardsB. main switchboardsC. emergency switchboardsD. distribution boards 55.Combustion knock can occur in the cylinders of a diesel engine under any condition permitting ______.A. a shortened ignition delay periodB. a lean fuel/air mixtureC. excess fuel in the combustion chamberD. rapid vaporization of injected fuel droplets56.Oil mist detectors are usually used on board to detect oil mist density within ______.A. the engine crankcaseB. the engine scavenge boxesC. drain tanksD. fuel tanks57.Before doing maintenance on electrical equipment, you should ______.A. turn off power firstB. turn on power firstC. with a test pen in handD. tell C/E 58.When start a screw pump, the by pass valve should be ______.A. closedB. opened fullyC. cracked openD. partly open59.Our company has built a new ship in Hamburg and I am going to fly there to______.A. hand it overB. take it overC. carry it overD. carry it out60.Routine monitoring of a diesel engine should include ______.A. checking for leaksB. checking temperatures and pressuresC. listening for abnormal noisesD. all of the above.61.Which of the precautions listed should be observed when taking on diesel fuel?A. Secure all lighting to the main deck.B. Provide a portable fan to blow away fumes.C. Prohibit smoking in the area.D. Display a black triangle during daylight hours.62.The conventions under which the port state control inspection is carried out include all the following except______.A. SOLAS 74B. MARPOL 73/78C. STCW 78/95D. ISM Code63.A portable foam fire extinguisher is placed in operation by ______.A. turning it upside downB. pressing the foam leverC. squeezing the grip handleD. opening the hose valve 64.In cleaning up an oil spill, the use of chemical agents would ______.A. absorb the oil for easy removalB. remove the oil from the waterC. disperse or dissolve the oil in the waterD. not affect the oil65.While on watch in the engine room, you hear a continuous sounding of the general alarm. Which of the following actions should you take?A. Make an entry in the official logbook.B. Open the master control valves on the fixed CO 2 system.C. Start the fire pump and check discharge pressure.D. Secure auxiliary condenser overboard discharge.66.One of the disadvantages of using carbon dioxide to extinguish a fire in an enclosed space is ______.A.the … snow ‟ whic h is sometimes discharged along with the gas is toxicB. prolonged exposure to high concentrations of CO 2 gas causes suffocationC. rapid dissipation of the CO 2 vaporD. the CO 2 gas is lighter than air and a large amount is required to extinguish a fire near the deck 67.The company should establish procedures to ensure that the ship is maintained______ the provisions of the relevant rules and regulations.A. out of accordance withB. in relation toC. in conformity withD. in connection with 68.The maximum Blood Alcohol Concentration (BAC) rate on board shall not be more than ______ by weight any time when being tested. But watch-keepers are not allowed to drink any alcoholic beverage ______before their watch.A. 0.08%/ 4 hoursB. 0.08%/ 2 hoursC. 0.04%/ 4 hoursD. 0.04%/ 2 hours二、关联题(每组关联题题干下有4个小题,每小题4个选项)第一组:Because the exhaust gas driven turbo-blower cannot provide enough air at low engine speeds, the pressurized air should be cooled to increase the charge air density. As the air passes through the charge air cooler, its temperature may be reduced and moisture condensed, with the condensate in danger of being carried into the engine. So a water separator should be mounted beneath the bottom part of the engine inlet manifold.Lubricating oil from the compressor will pass along the air lines and deposit on them, in the event of a cylinder air starting valve leaking, hot gases would pass into the air pipes and ignite the lubricating oil. If starting air were supplied to the engine, this would further feed the fire andcould lead to an explosion in the pipelines. In order to prevent such an occurrence, cylinder-starting valves should be properly maintained and the pipelines regularly drained. Also oildischarged from compressors should be kept to a minimum, by careful maintenance.69.A water separator is used in order to ______.A. keep the air from being carried into the engineB. keep the moisture from being condensedC. keep the danger from being carried into the engineD. take away the condensate from the air70.Why should we use a charge air cooler?A. In order to increase the charge air temperature.B. In order to increase the charge air pressure.C. In order to reduce moisture condensed.D. In order to increase the charge air density.71.Which of the following may cause an explosion according to the passage?A. Starting air cannot be supplied into the engine.B. Air starting valve leaks and starting air is supplied into the engine.C. Cylinder-starting valves are properly maintained.D. Oil discharged from compressors is kept to a minimum.72.In order to avoid igniting the lubricating oil and leading to an explosion in the pipelines, ______.A. pipelines should be regularly drainedB. cylinder-starting valves should be properly maintainedC. oil discharged from compressors should be kept to a minimumD. A+B+C第二组:Maintenance and OverhaulingSatisfactory and proper operation of the engine depends not only on correct manoeuvring but also on how well it is kept in order. Regular maintenance of the engine helps a lot in preventing early wear of parts and in ensuring a long service as well as the working efficiency of the engine.With various types of engines, of course, the maintenance and overhaul is different. Instruction books are to be referred to whenever necessary.The individual parts of the engine should be inspected and thoroughly cleaned at regular intervals. The periods for such overhaul work depend largely on the quality of the lubricating oil and fuel, on the load and on the efficiency of the operator in locating troubles and remedyingthem in time..During overhaul the safety rules have to be observed as required in order to prevent the danger of accidents. Special precaution is necessary when the engine is running with the lagging removed. During overhauls with the engine shut down, safety measures should be taken to avoid undesirable turning of the crankshaft. All pipes should be pressure-relieved before the repair work is started. Read the pressure gauges and /or check the pipes by carefully loosening the screw plugs or connections.If some parts of the running gear are dismantled, before using the turning gear, make sure that no loose parts are jammed in the crankcase where it is easy for them to cause damage.73.According to the passage, which the following factors are involved to keep the enginesatisfactory and proper running?A. correct manoeuvringB. keep the engine in orderC. refer to the instruction booksD. all of above74.According to the passage, which the following items do influence the periods of the overhaulingwork?A. the quality of the lubricating oilB. the load of the engineC. the efficiency of the operator in locating troubles and remedying them in timeD. all of the above75.According to the passage, we should take special precaution when ____.A. the engine is running with the removal of laggingB. the engine is shut downC. pipes are removedD. the screw plugs or connections are lossened76.According to the passage, line 17 the bold and italic word “it” may propabably mean ____ .A. running gearB. turning gearC. crankcaseD. to cause damage中华人民共和国海事局2003年第3期海船船员适任证书全国统考试题(总第32期)科目:轮机英语试卷代号:803适用对象:无限、近洋航区3000KW及以上船舶大管轮(本试卷卷面总分100分,及格分为70分,考试时间为100分钟)答题说明:请选择一个最合适的答案,并将该答案按答题卡要求,在其相应位置上用2B铅笔涂黑。
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48期3000KW及以上二三管轮船舶辅机试卷浙江国际海运职业技术学院()1.下列泵中属于容积式泵的是________。
A.往复泵 B.旋涡泵 C.喷射泵 D.离心泵()2.会使泵的允许吸上真空度减小的是________。
A.吸入液面大气压力升高 B.输送液体温度降低C.泵的流量增加 D.泵的流量减少()3.往复泵的作用数一般相当于活塞在________的排水次数。
A.每秒钟内 B.每分钟内 C.电动机每转 D.曲轴每转()4.下列泵中电动机要通过减速机构带泵工作的是________。
A.齿轮泵 B.水环泵 C.旋涡泵D.往复泵()5.改变往复泵的流量不能用改变________的方法。
A.转速 B.活塞有效行程 C.旁通回流阀开度D.排出阀开度()6.电动往复泵交流电机相序接反可能会导致________。
A.电机过载 B.不能排液 C.润滑不良 D.产生"气穴现象"()7.普通齿轮泵最常用的轴封是________。
A.软填料密封 B.机械轴封 C.唇形密封圈 D.O形密封圈()8.图中齿轮泵两个齿轮的旋转方向是_。
A.l顺时针,2逆时针B.1逆时针,2顺时针C.1和2都顺时针D.l和2都逆时针()9.为消除困油现象,齿轮泵普遍开设卸荷槽,其开设位置在_。
A.1上B.2上C.1和2上都要开D.与1和2端面接触的两端盖内侧()10.电动齿轮泵允许的额定排压与________无关。
A.密封性能 B.轴承承载能力 C.电动机功率D.几何尺寸()11.电动齿轮泵排出压力过高的危害不包括________。
A.轴承径向力过大 B.磨损和漏泄增加C.困油现象加重 D.电动机过载()12.使齿轮泵吸入真空度不足而吸油困难的原因不包括________。
A.轴封漏泄 B.泵内间隙过大 C.拆修后装复时泵内未浇油D.油温太低()13.机械轴封的动密封面是在________之间。
A.动环与转轴 B.静环与端盖 C.动环与静环 D.动环与端盖()14.关于内轴承式双螺杆泵的下列说法中错误的是________。
A.只能输送润滑性液体 B.有四个滚动轴承C.只有一个轴封D.有单独的轴承润滑系统()15.三螺杆泵排出压力过高不会导致________。
()16.调节螺杆泵流量或工作压力的方法一般是调节________。
A.排出阀 B.吸入阀 C.旁通阀 D.A或B()17.大流量离心泵常采用________。
A.多级离心泵 B.开式叶轮 C.低比转数叶轮 D.双吸式叶轮()18.下列泵中随排出压力增大而轴承径向负荷加大的是________。
A.导轮式离心泵 B.往复泵 C.螺杆泵 D.双作用叶片泵()19.离心式锅炉给水泵工作时随着锅炉蒸汽压降低,下列说法错误的是________。
A.轴功率减小 B.排出压力降低 C.流量增大 D.吸入压力降低()20.估计排送冷水的离心泵的流量时,流量应与泵的________成正比。
A.转速 B.叶轮直径的平方 C.吸口直径 D.吸口直径的平方()21.水环泵从某封闭容器抽气,该容器中真空度越大,抽气量________。
A.越大 B.越小 C.不受影响 D.因不同情况而异()22.对离心泵,关闭排出阀启动时________。
A.扬程最高,轴功率最小,效率最高B.扬程最高,轴功率最小,效率最低C.扬程最低,轴功率最大,效率最低 D.扬程最低,轴功率最小,效率最高()23.关于离心泵并联,以下说法错误的是________。
A.尽量用扬程相近的泵 B.管路应是静压较低、阻力较小C.并联流量为各泵单独使用的流量之和D.并联后扬程比各泵单独使用时的扬程高()24.GB10832-89规定,在试验中逐步增大吸入真空度,当泵扬程或效率下降(2+K/2)%时的汽蚀余量(K指泵的型式数)称为________汽蚀余量。
A.必需 B.有效 C.装置 D.临界()25.会使离心泵电流降低的是________。
A.排出压力增高 B.流量增加 C.转速增加 D.排出管破裂()26.离心泵水压试验的压力为设计压力的________倍,时间不少于________min,铸件表面不渗漏。
A.1.5,5 B.1.7,5 C.1.5,10 D.1.7,10()27.旋涡泵相对离心泵而言能产生较高扬程是因为________。
A.转速更高 B.叶轮直径更大 C.级数更多D.液体进入叶轮次数更多()28.旋涡泵比较经济简便的流量调节方法是________。
A.回流调节 B.节流调节 C.变速调节 D.切割叶轮调节()29.喉嘴面积比大的水喷射泵________。
A.是高扬程喷射泵 B.是低扬程喷射泵 C.m与扬程无关 D.效率较高()30.蒸汽喷射器的工作流体采用________。
A.湿蒸汽 B.饱和蒸汽 C.低过热度蒸汽 D.高过热度蒸汽()31.研究单级活塞式空气压缩机理论循环并未假定________。
A.气缸没有余隙容积 B.吸、排气过程没有压力波动C.工作过程没有气体漏泄D.气缸与外界没有热交换()32.按理论循环计算,各级________相等时总耗功最省。
A.压差 B.压力比 C.温升 D.多变指数()33.空压机通常在________后面设安全阀。
A.第一级 B.最末级C.每一级 D.第二级()34.关于空压机下列说法中错误的是________。
A.滑油冷却温度越低越好 B.冷却滑油可延缓油的氧化变质C.冷却滑油可帮助摩擦面散热 D.滑油冷却应使油温保持在70℃以下()35.能使空压机停车的自动保护不包括________。
A.排气温度过高 B.滑油油压过低 C.冷却水温度过高 D.排气压力过高()36.船用空压机启阀式卸载机构可用强开________方法卸载。
()37.防止空压机着火爆炸的措施中不正确的说法是________。
A.及时清除气道中积油、积炭(防止厚度超过3 mm)B.选闪点尽量高的滑油C.防止排气温度超过滑油闪点20℃以上D.避免长时间空转()38.空压机后冷却良好不能使________。
A.进气瓶气体含液量减少B.排气量明显增加C.进气瓶空气比容减小 D.进气瓶空气温度减小()39.可以作为卸荷阀使用的是________。
A.直控顺序阀 B.外控顺序阀 C.减压阀 D.可调节流阀()40.船舶液压装置中使用比例方向阀较多的是________。
A.舵机 B.锚机 C.绞缆机 D.起货机()41.下列液压控制阀中不属于压力控制阀的是________。
A.溢流节流阀 B.顺序阀 C.减压阀 D.背压阀()42.直流电磁换向阀与交流电磁换向阀相比不具有_________特点。
A.工作寿命长 B.允许换向频率较高 C.换向动作平稳D.价格较低()43.用溢流阀作安全阀的系统油压突然升高,油压需________阀才开启。
A.达到阀开启压力 B.达到阀调定压力 C.超过阀调定压力 D.低于阀调定压力()44.当溢流阀导阀阀座小孔堵塞时________。
A.系统压力调不高 B.系统压力波动C.溢流阀无法开启 D.产生噪声和振动()45.先导型减压阀出口油压调不高不会是________。
A.主阀阻尼孔堵 B.主阀弹簧失去弹力 C.主阀阀盖漏泄 D.导阀打不开()46.对斜轴式泵排量不直接产生影响的是________。
A.柱塞直径和个数 B.缸体摆角 C.油缸分布圆直径 D.柱塞长度()47.造成轴向柱塞泵缸体与配流盘磨损过快的常见原因是________。
A.工作压力过高 B.转速过高 C.液压油污染 D.操作失误()48.液压甲板机械采用低速液压马达的好处是________。
A.输出功率大 B.工作压力高 C.结构强度高D.可省去减速机构()49.液压马达与电动机相比,所具有的优点包括________。
A.对环境温度适应性强 B.便于带负荷启动C.可实现精确的传动比 D.维护更方便()50.液压马达出现"爬行现象",主要是由于________引起。
A.油压过低 B.负荷过重 C.马达瞬时排量不均 D.摩擦力太大()51.下列滤油器中作为精滤器使用的有________。
A.网式 B.纸质 C.磁性 D.A和C()52.液压系统油箱透气孔处需设置________。
A.空气滤器 B.补油滤器 C.防溢油装置 D.普通滤器()53.吸收液压冲击或压力脉动用的蓄能器,应安装在________。
A.换向阀处 B.泵出口处C.靠近冲击源或脉动源处 D.无特殊要求()54.锚机将单锚从三节锚链收至一节锚链的平均速度应不小于________m/min。
A.5 B.8 C.9 D.12()55.液压起货机的辅泵供油式液压操纵机构可通过手控双联比例减压阀去控制________换向节流阀。
A.电磁 B.液动 C.电气 D.比例()56.回转式起货机液压系统使用的冷却器以________为主。
A.淡水冷却式 B.海水冷却式 C.强制对流风冷式 D.自然对流风冷式()57.采用溢流阀控制的自动绞缆机在正常收、放缆时溢流阀________。
A.泄放液压泵全部流量 B.泄放液压泵绝大部分流量C.关闭不泄油 D.泄放液压泵小部分流量()58.液压油氧化变质后________不会增加。
A.酸值 B.沉淀物C.黏度指数 D.黏度()59.如需启用液压装置,液压油温在-10~10℃之间,则________。
A.可以先轻载使用 B.可以空载运行,至油温升到10℃以上再正常使用C.即可投入正常工作 D.必须先加热至油温10℃以上方可使用()60.________是使液压装置液压油温度过高的常见原因。
A.内泄漏过大 B.泵转速过高 C.工作压力过高 D.工作时间过长()61.执行元件满载比空载的最大工作速度降低很多,是因为________。
A.电动机功率不足 B.电源电压不稳 C.装置容积效率低D.执行机构摩擦阻力大()62.关于食物冷藏,下列说法中不正确的是_________。
A.臭氧不适于油脂类食品 B.低温冷藏不能杀灭细菌C.湿度过高对0℃以上食品保存不利D.对冷库湿度的要求与空调相似()63.在蒸发器的绝大部分,制冷剂处于_________状态。
A.过冷液体 B.过热蒸气 C.湿蒸气 D.饱和液体()64.当其他温度条件一定时,冷凝温度越低,则_________。
A.单位功耗越大 B.制冷系数越小 C.制冷剂循环量越大D.膨胀阀后蒸气干度越小()65.压缩机工作时一般压力比大于3,若机器状况和其他温度条件不变,随着蒸发温度的降低,制冷压缩机的轴功率通常是_________。
A.增大 B.不变 C.降低 D.先降后增()66.上图为压缩机制冷原理图,系统正常运行时在管路5处的制冷剂状态主要是_______。