轮机长最新轮机英语4647题库汇总（附答案）

1、轮机长最新轮机英语4647题库汇总（附答案） 编号 问题 选择a 选择b 选择c 选择d 答案 注解 1 a large diesel engine installation, crankshaft axial alignment is maintained by the _.piston rod guides engine thrust bearing crosshead bearing main shaft flexible coupling b 在大型柴油机安装中，曲轴靠推力轴承保持轴向对中。 2 diesel engine which is rated for normal opera

2、tion at a crankshaft speed of 800 rpm, is commonly classed as a _.slow-speed diesel medium-speed diesel high-speed diesel constant-speed diesel b 曲轴转速800转分以额定功率正常运行的柴油机称 为中速柴油机。 3 which of the following statements is correct concerning available astern power for diesel main propulsion systems? aster

3、n power is to be provided in a sufficient amount to secure proper control of the ship in all normal circumstances. the astern power of the main propelling machinery is to provide for continuous operation astern at 60% of the ahead rpm at rated speed. main propulsion systems without reversing gears,

4、controllable pitch propellers or electric propulsion drive, running astern is not to lead to overload conditions.power available will be equal to ahead power when controllable pitch propellers are utilized, thus discounting the need for increased operating parameters.a 倒车功率必须能提供足够的功率确保在各种正常情况下能够对船舶进

5、行适当的控制。 4 operates at the same speed as the engines, which of the operating conditions listed will apply? full horsepower is available ahead and astern. one engine must be running ahead and the other astern. full reversing torque is not available. mechanical reduction gearing is required. d 当两台中速柴油机

6、并排连接到同速运转的普通螺旋桨轴上，需要机械减速装。 5 which of the listed design features is most common to a two-stroke/cycle low-speed main propulsion diesel engine? crosshead construction. cross-scavenging air flow. trunk type pistons. single reduction gearing. a 低速二冲程主推进柴油机普遍采用十字头结构。 6 a disadvantage of a two-stroke/cyc

7、le diesel engine is _. more power strokes per revolution the use of scavenge air more complicated valve gear higher working temperatures of the piston and cylinder d 二冲程柴油机的缺点是气缸头的温度高。 7 _.opposed-piston engine double-acting engine two-stroke/cycle engine four-stroke/cycle engine d 与相同马力的柴油机相比，四冲程柴油

8、机的废气温度高。 8 the double bottom in a vessel is a space comprised of _. plating forming the engine room tank top double plating installed over the flat keel plate a watertight boundary formed by the inner bottom compartments between the inner and outer bottoms d 船的双底壳是由内外两层构成的。 9 a water jacket is place

9、d around the exhaust manifolds of propulsion diesel engines to _. reduce heat radiation to the engine room aid in preventing turbocharger overheating condense and drain moisture from exhaust gases dampen exhaust gas pulsations in the manifold a 环绕排气总管的水套是为了减少对机舱的热辐射。 10 of the listed types of starin

10、g systems is often used on large, low speed, direct reversing, main propulsion diesel engines?electric. hydraulic. air. all of the above. c 大型低速可逆转主推进柴油机使用空气起动系统。 11 the over-speed trip installed on most diesel engine will stop the engine by shutting off the _. water supply fuel oil supply lube oil

11、supply exhaust damper b 大多数柴油机安装的超速保护（停车）装置通过切断燃油供油使发动机停车。 12 a common rail system, excessive pressure in the header may be caused by _.improper adjustment of the bypass valve a dribble in the fuel injection nozzle insufficient through injection nozzle packing a malfunctioning leak-off injection noz

12、zle a 在共轨燃油喷射系统中,集油管压力过大可能是由于旁通阀调节不当而造成的。 13 diesel engine electric starting motors generally require heavier duty motors and operaste at higher voltages than comparable starting motors for gasoline engines due to _. higher speed required flywheel-effect lower starting temperatures higher compressio

13、n pressures d 因为要更高的压缩压力，柴油机电起动马达与类似的汽油机的起动马达相比，要有更大的功率和更高的电压。 14 their foundations with fitted bolts at the drive end and clearance (loosely fitted) bolts in other locations. this is done to _.maintain alignment when the ships hull is working in heavy seas ensure engine vibrations correspond to the

14、 natural frequency of the hull permit the engine to expand away from the driven equipment as the engine heats up and expands maintain engine thrust bearing clearances c 当与倒车减速装置一起使用时，中速柴油机应该在传动端用装配螺栓与底座连在一起，而在其它地方则用间隙螺栓固定，这样可使柴油机热膨胀时留有膨胀余地。 15 a diesel engine with a combustion chamber located betwee

15、n the crowns of two pistons is known as a / an _. double-acting engine opposed pistons engine single-acting engine horizontal acting engine b 柴油机的燃烧室介于两个活塞之间，这种发动机称为“对置活塞式柴油机”。 16 they must be located at the after end of the engine they can only be used with one engine at a time they eliminate the n

16、eed for controllable pitch propellers they are connected to the engine with a flexible coupling d 减速齿轮与发动机采用柔性联轴节连接。 17 four-stroke / cycle diesel engine because _.it has a longer power stroke more air gets into the cylinder each stroke it develops twice as many power strokes at the same speed highe

17、r combustion pressure is developed c 理论上，二冲程柴油机发出的功率是相同四冲程柴油机的两倍。 18 the minimum speed an engine must attain before ignition can occur depends upon _. the type and size of the engine the condition of the engine ambient temperature all of the above d 发动机发火之前必须获得的最低转速取决于发动机的类型和尺寸、发动机的状态和环境温度等因素。 19 th

18、e simple admission of fuel and air into the combustion space only the pressure of gases developed specially designed parts connected to a shaft the concept of reciprocity b 在柴油机工作时，内部燃烧引起活塞被燃气压力驱动。 20 diesel engines are classified as reciprocating internal combustion engines because they _. use ener

19、gy from fuel burned outside their cylinders burn fuel in a combustion chamber that moves back and forth burn fuel in a chamber where its energy moves a piston back and forth use a continuous combustion process to impart rotary motion to the pistons c 把柴油机归类于往复式内燃机，是因为燃油在燃烧室内被燃烧，产生能量使活塞作往复运动。 21 a ma

20、in propulsion diesel engine is normally shut down by _. shutting off the air supply over-speeding the engine securing the fuel supply securing the ignition system c 主推进柴油机是通过切断燃油供应实现停车的。 22 the thermal energy produced by an internal combustion engine is transformed into _. combustion energy internal

21、 energy external energy mechanical energy d 内燃机产生的热能转换成机械能。 23 maximum horsepower of a diesel engine is attained _. when the engine rpm is pulled down by overload at rated engine rpm at 95% of rated engine rpm at 95% of a properly adjusted governor rpm with the engine under full load b 在额定转速时所产生的功率是

22、柴油机的最大功率。 24 operated.electric heat mechanical exhaust b 柴油机作为热机，热能是其功率的。 25 block may be made in one piece.the column the jacket cylinder cover cylinder liner a 由于小型发动机的铸件不是很重也不是很大，机架和气缸体可以做成一体。 26 _ system is arranged to ensure that water can be drawn from any tank or the sea and discharged to any

23、 other tank or the sea as required to trim the vessel. the domestic water bilge water oil transfer the ballast d 压载水系统用来确保能从任一个舱或海中吸入海水，也能将水排到任一舱或海中，达到平衡船舶之目的。 27 at 18 knots?13.82 tons 15.61 tons 16.00 tons 16.37 tons a 船舶以15节的速度航行时耗油8吨，那么以18节的速度航行时的耗油量为：m2=（v2 / v1）3m1=（18 / 15）38=13.82（吨）。 28 eac

24、h cylinder liner on the marine medium speed engines _. is usually cooled by sea water can be replaced when worn out is in direct contact with the water in the bore of the cylinder cant expand when heated b 船用柴油机的缸套磨损后可以更换。 29 energy losses due to _ occur in every machine. speed friction impact atmos

25、phere b 由于磨擦造成的能量损失在每一台机器都存在。 30 b&w, 2-stroke cycle, single acting direct reversible, cross-head, welding design type diesel engine with turbo-charge, these information refers to _.the type of a pump the type of a turbo-charge the type of an accessory equipment the type of a main engine d 日立b&w、二冲程

26、循环、单作用直接换向、十字头、焊接设计、带涡轮增压等等，显然介绍的都是主机的特性。 31 ship will _.require ballast added to only the port side tanks be down by the head sink float d 如果船体浮力等于或大于船舶的排水量，船舶就能浮在水面上。“buoyant force、displacement tonnage”意为“浮力、排水量吨位” 32 the stability of a vessel is normally the greatest when all fuel and water tanks

27、 are full because the _. center of gravity is lowered center of buoyancy is lowered reserve buoyancy is unchanged hull freeboard is increased a 当所有水舱和燃油舱都注满时，由于重心降低，船舶的稳性最好。 33 thrust and resistance equal each other, the ship always travels at a constant speed.as long as as far as as well as unless

28、a 只要船舶的推力与阻力相等，船舶将匀速前进。“as long as”意为“只要” 34 ship _ the wake value.the higher the lower the faster the slower a 船舶产生的伴流与船舶形态有很大关系。一般地说，船舶的线型越肥满，产生的伴流就越大。“wake”意为“【船】伴流，尾流，航迹”；“bluff”意为“船头平阔而垂直的，肥满线形的，非流线型的” 35 _.the speed of the vessel the speed of the propeller the wake the wake fraction c 船舶前进时，带动

29、艉部的水产生向前运动，这就是所谓的“伴流”。“impart m to n”意为“将m传授于（传给）n” 36 _ can be found on most medium to large merchant vessels even if the main engine is either a steam turbine or a 2-stroke crosshead engine. the medium speed 4-stroke trunk piston engine the low speed 2-stroke crosshead engine the medium speed 2-st

30、roke crosshead engine the low speed 4-stoke piston engine a 中速四冲程筒状活塞式柴油机可见于大多数的中型和大型商船，即使其主机是蒸汽透平或是二冲程十字头式柴油机。“even if”意为“即使”。 37 to be aligned with reduction gearing and shafting as is the case with conventional installations. diesel engine propulsiondiesel electric propulsion steam engine propuls

31、ion gas turbine propulsion b 柴油机电力推进系统的柴油机可布置在（机舱的）最佳位置，而不用象常规装置那样考虑柴油机与减速器和轴系的对中问题。 38 speed engines have a _ power to weight ratio than the slow speed two strokes, but due to the higher speeds tend to have _ maintenance intervals.higher / reduced higher / increased lower / reduced lower / increase

32、d a 中速机与低速二冲程机相比有较高的功率/重量比，但也因其高速使得维修间隔缩短。 39 special thrust devices are provided on ships to improve their _ at zero ship speed when the rudder is relatively ineffective. maneuvering capabilities starting capabilities stopping capabilities acceleration capabilities a 特殊的推进设备（侧推器）被安装在船舶上，在船速为零，无舵效时改

33、善船舶的机动能力。 40 the diesel engine is similar to the gasoline engine in that _. both of them are ignited by compressed air both of them are the forms of external combustion engines both of them have spark plugs the power is developed by the piston in the cylinder d 柴油机和汽 油机的相似点在于都使用活塞传递功率。 41 the reason

34、 why more and more of the large merchant vessels are being powered by medium-speed diesel engines is _. they operate between 150 and 450 rpm they are connected to the propeller by gearing their smaller size and weight they can be connected directly to the propeller without gearing c 越来越多的商船使用中速柴油机，原

35、因在于它们体积小，重量轻。 42 gas turbines differ from steam turbines in that _. steam rather than gas is used to turn a shaft vapor rather than gas is used to turn a shaft the former uses gas to turn a shaft the latter uses gas to turn a shaft c 燃气涡轮和蒸汽涡轮区别在于前者使用燃气驱动转轴。 43 a ship designed for carrying goods req

36、uiring refrigeration is called _. reeeer ro/ro ship container tanker a 被设计装载需要制冷的货物的船舶称为“reeeer”。 44 propulsion apparatus is remotely controlled on the navigating bridge control station, and engine room is watched by duty personnel.brc mcc aut-0 aut-1 a 船级证书中对于机械设备的附加标志brc，代表了推进装置可以由驾驶台远程控制，机舱由轮机值班人

37、员负责当班。 45 the additional mark _ in the classification certificate for machinery represents that personnel are watching at engine assembly control station and monitoring all machinery and electronic devices. brc mcc aut-0 aut-1 b 船级证书中对于机械设备的附加标志mcc，代表了轮机人员集控室值班，监控所有机械和电子设备。 46 additional mark _ in the classification certificate for machinery means propulsion apparatus is remotely controlled on