最新轮机英语题库1801-2000教学讲义PPT
轮机英语教学课件(29) control systems 2
独立于驾驶台控制系统的应急停车控制系统
8. Also the bridge watchkeeper must be made aware of any machinery fault, that the fault is being attended to and that it has been rectified.
the initial movement actuating the starting sequence on air为独立主格结构， 译文为：其初始动作是按起动顺序进空气
when a pre-set r/min has been reached 为时间状语从句，译为当达到预定转数时。
4. Subsequent movement of the lever operates a servo-mechanism which adjusts the speed setting lever on the engine and which is in turn connected to the governor.
sensor, the difference between these two signals being the r/min deviation from the required.
《轮机英语》最新题库注解
《轮机英语》老题库注解陈黄骞编写1. 船舶在加装燃油结束后，在拆卸油管前，一般用压缩空气吹洗残留在软管内的油。
2. "发动机备车"就是使发动机准备起动。
3. 机座是发动机的基础，如无其支撑，发动机的整体，尤其是轴的对中都将无从保证。
4. 飞重通常被用在机械-液压式调速器中感受发动机的速度。
5. 直列式和V型发动机的机架上一般都有道门以提供曲轴和连杆大端轴承的维修通道。
6. 回流扫气中，温度较低的扫气空气和温度较高的废气通过相邻的气口，引起缸套材料的温差问题。
7. 十字头销变椭圆了，需要光车。
8. 联锁装置用来防止在发动机换向完成之前起动空气进入气缸。
9. 燃油和滑油在进入发动机之前，都需要经过处理。
"Both A and B"意"A和B两者都"；"neither A nor B"意"既不是A也不是B"；"either A or B"意"A、B两者之一"。
10. 有时采用滑油来冷却活塞因其漏入曲柄箱不会产生（污染）问题。
11. 通过吹入新鲜空气驱除废气的过程称为扫气。
12. 淡水用来冷却气缸和气缸头，咸（海）水用来冷却润滑油，冷却器中的淡水和空冷器中的增压空气。
13. 造成发动机运行过程中功率下降或失速，首要的可能原因是轴承过热。
14. 发动机曲轴失中可以通过测量臂距差来判断。
15. 发动机A形机架的顶部有一坚固的铸铁框架称为扫气箱。
16. 铝质活塞具有惯性小（重量轻）、热膨胀系数大的特点。
17. 回流扫气式发动机中，扫气口和排气口布置在同一侧。
18. 值班人员不能做任何影响他们对主要机械和相关设备监视职责的工作。
19. 气阀推杆间隙过小会引起排气阀过早打开、过晚关闭。
20. 气阀推杆间隙过大会引起排气阀过晚打开、过早关闭。
21. 气阀推杆间隙过大会引起排气阀过晚打开、过早关闭。
轮机英语教学课件(21) Air Conditioning System
Air Conditioning System
Analysis of some long and difficult sentences:
1.Air conditioning systems fall into two main classes: individual unit systems, in which each room contains its own small refrigeration plant and fan and air cooler; and central systems, where larger refrigeration machinery units are installed and their output distributed about the ship by a variety of means.
Air Conditioning System phrases
air conditioning system individual unit system central system self-contained units the single duct system individual temperature
译文:即使是控制一单人舱室的直接作用式的温度调节器的位置也必须精 心选定，如果它被遮蔽在窗帘后面，或者离供风进口太远， 控制就会 不灵敏。
分析：该句主语是the site, for a direct acting thermostat 是其后置定语， to control one single berth 是 thermostat 后置定语, must be chosen ， with care为方式状语。if … sluggish.是前文的解释,其主语是control, sluggish为表语, behind curtains, or too far away from the air inlet 均为 条件状语从句中的地点状语。
轮机系统英语试题及答案
轮机系统英语试题及答案一、选择题（每题2分，共20分）1. What is the primary function of a marine engine?A. To generate electricityB. To propel the shipC. To provide heatingD. To cool the engine2. The term "deadweight tonnage" refers to:A. The weight of the ship without cargoB. The maximum cargo capacity of the shipC. The weight of the ship fully loadedD. The total weight of the ship including cargo3. Which of the following is NOT a type of marine fuel?A. Heavy fuel oilB. Marine diesel oilC. Liquefied natural gasD. Gasoline4. What does the abbreviation "BOP" stand for in a ship's engine room?A. Ballast On PumpB. Blow Off PressureC. Black Oil PumpD. None of the above5. The main purpose of a ship's propeller is to:A. Generate electricityB. Provide stabilityC. Change the direction of the shipD. Convert rotational motion into thrust6. What is the role of a marine boiler?A. To produce steam for propulsionB. To cool the engineC. To provide fresh waterD. To heat the ship's interior7. The term "trim" in ship terminology refers to:A. The angle of the ship's bowB. The weight distribution along the ship's lengthC. The shape of the ship's hullD. The speed of the ship8. What does "GT" stand for in ship specifications?A. Gross TonnageB. Gross TransportC. General TransportD. Global Trade9. The main difference between a diesel engine and a steam turbine is:A. The type of fuel usedB. The method of converting thermal energy into mechanical energyC. The color of the engineD. The size of the engine10. What is the purpose of a ship's bilge system?A. To clean the ship's hullB. To remove water from the ship's interiorC. To provide fresh water for the crewD. To cool the engine答案：1. B2. B3. D4. D5. D6. A7. B8. A9. B10. B二、填空题（每空1分，共10分）1. The main components of a marine engine include the__________, the __________, and the __________.2. The term "draught" refers to the __________ of the ship below the waterline.3. A ship's hull is divided into several __________ to increase its structural integrity.4. The "load line marks" on a ship indicate the __________ of the ship when loaded with cargo.5. The "freeboard" is the distance between the waterline and the __________ of the ship.6. The "safety valve" in a marine boiler is designed to__________ pressure.7. The "main engine" is the primary source of __________ fora ship.8. The "stern tube" is the part of the ship where the__________ is located.9. "Machinery space" refers to the area where the ship's__________ are located.10. The "lifeboat" is a vessel designed to __________ people in case of an emergency.答案：1. engine, boiler, turbine2. depth3. compartments4. maximum permissible draft5. deck6. relieve excessive7. propulsion8. propeller9. engines10. rescue三、简答题（每题5分，共10分）1. Explain the difference between a single-screw ship and a twin-screw ship.2. Describe the function of a ship's anchor and how it is used.答案：1. A single-screw ship is propelled by a single propeller, which is driven by the main engine. It is simpler in designand usually less expensive to build and maintain. A twin-screw ship, on the other hand, has two propellers, each driven by an engine, which can be the same or different. This configuration provides better maneuverability, redundancy in case one engine fails, and often results in higher speeds.2. A ship's anchor is a device used to secure the ship when it is not in motion, particularly in harbors or at sea when the ship needs to be stationary. The anchor is dropped to the seabed, where it digs into the bottom, providing resistance to the ship's movement. The anchor is connected to the。
轮机英语(lesson 1)
China Maritime Police Academy
evaporator frigate funnel habitability hatch layout longitudinal
n. n. n.
造水机 护卫舰 烟囱
n. 可居住性 n. 舱口 n. a. 规划，设计，布局图 经度的，纵向的
China Maritime Police Academy
• 在造船工程和轮机工程两个领域有些职责发生了重叠，比如推进器设计， 船舶结构的减噪和减震，以及为船舶许多领域提供工程服务。
• A ship might reasonably be divided into three distinct areas: the cargo-carrying holds or tanks, the accommodation and the machinery space.
China Maritime Police Academy
0.3 Examination of the course
Everybody who want to attain the
seafarer fitness certification, should
take part in the examination twice
China Maritime Police Academy
Байду номын сангаас
• The marine engineer is responsible for the various systems which propel and operate the ship.
• 轮机工程负责船舶推进和操控的各种系统。
• More specifically, this means the machinery required for propulsion, steering, anchoring and ship securing, cargo handling，air conditioning, power generation and its distribution.
新版轮机英语unit13课课件
The
energy released by the burning fuel in the boiler furnace（炉膛） is stored (as temperature) in the steam produced.
All boilers have a furnace or combustion chamber where fuel is burnt to release its energy.
Double evaporation boilers (蒸发） A double evaporation boiler uses two independent system for steam generation and therefore avoids any contamination between the primary and secondary feed water.
Air
is supplied to the boiler furnace to enable combustion of the fuel to take place.
A
large surface area between the combustion chamber and the water enables the energy of combustion, in the form of heat , to be transferred to the water .
The
primary circuit（初级循环回路） is in effect a conventional water tube water boiler which provides steam to the heating coils of a steam-to-steam generator, which is the secondary system.
轮机英语教学课件(13) Marine Medium Speed Diesel Engine II
Useful Vocabulary & Special Terms
i. By the use of stretch gauges j. By using a torque wrench k. To be reconditioned by grinding in
valves l. Dismantle the whole component m. Valve rotator n. Ratcheting mechanism o. Be operated by the rocket gear
inlet and exhaust valves? h. What is the usual problem concerning the inlet and
exhaust valves? And how to deal with it?
Review Questions
i. What is the valve rotator used for? j. By what can the valve clearance be
3. Detailed Analysis of Difficult Sentences
5、Valve rotators which carry out this movement have a type of ratcheting mechanism which indexes the valve round a small amount every time it is operated by the rocket gear.
Main contents of the text
a. Pistons b. Bearings c. Inlet and exhaust valves d. Valve operating gear
轮机英语教学课件(04) Cooling Water System
Reviewing Questions
1. Why do we have to apply the cooling water system to the engine?
2. How to achieve the cooling of the engines? 3. Why is lube oil sometimes used for piston
4. Some modern ships use what is known as a central cooling system with only one large sea water circulated cooler. (宾语从句) 有些现代船舶使用一种称作为中央冷却系统, 只有一个 大型的海水循环冷却器.
Some useful expressions
1. the combustion spaces 2. to avoid losing mechanical strength 3. internal passages 4. the usual used coolant 5. low specific heat 6. cooling fluids 7. be rejected to the sea 8. be liable to leave deposits 9. closed cooling system 10.open cooling system 11.the circulating pump 12.open to the atmosphere
Lesson Four
Cooling Water System
Teaching Procedures
• Step I Vocabulary • Step II Lead-in Question • Step III Focus • Step IV Grammatical Points • Step V Analysis of difficult Sentences • Step VI Questions • Step VII Related Multiple Choices to the
轮机英语新试题库
一、二等轮机英语复习题一、选择题1、(C)Good morning, Sir, I’m the ship chandler from x Company．Excuse me, canyou tell me where the _____ is, please?A．people park B．People park C．People Park D．people park 2、(D)Take the _____block on right and then ask again．A．2 B．two C．twice D．2nd3、(A)It’s quite far ______here, you have to take the bus No．13．A．from B．of C．for D．to4、(B)Where is the bus ______．A．off B．stop C．terminal D．go5、(B)turn _____and go ahead for about 10 minutes．A．back B．round C．gain D．off6、(A)Go ______ahead until you see a tree．A．straight B．line C．to D．for7、(C)China Town ______in the town center．A．located B．locating C．locates D．locate 8、(D)I’m looking _____my notebook．A．of B．over C．at D．for9、(A)He is my friend and he is ______to our country．A．new B．just C．only D．over10、(C)I have a book ______maybe have a map of this university．A．that B．who C．which D．it11、(A)Don’t enter ______I’m not inside．A．If B．Whether C．unless D．until 12、(C)Open the air cock _______get rid of air．A．for B．with C．to D．because 13、(D)Loading will be completed ________noon tomorrow．A．at B．in C．on D．by 14、(B)How ______fuel oil we need when we arrive at Singapore．A．many B．much C．some D．any 15、(A)We use the ballast pump instead _______the main sea water pump which isleaking．A．of B．with C．for D．off 16、(B)The E．R alarm is _______．What’s the matter．A．in B．on C．ring D．off 17、(B)Fifty six hundreds and ninety eight is______．A．5689 B．5698 C．9865 D．748 18、(D)_______the main engine should be cleared．A．Round B．About C．Over D．Around 19、(C)The viscosity of fuel oil and engine speed are rising．It means heavy oil________used now．A．is B．being C．is being D．was being20、(D)The engine ______yesterday looks all right．A．repair B．repairing C．repairs D．repaired21、(A)When will you arrive _______ Hongkong．A．at B．in C．on D．×22、(B)I agree _________you to reduce the engine speed．A．on B．with C．for D．to23、(A)I’m good _______cooking．A．in B．of C．with D．for24、(B)Fill this application form and the duplicate copy is _______you．A．to B．for C．with D．of25、(C)“Fill the diesel oil first．” What’s _______rate?”A．pump B．p/p C．pumping D．pumps26、(C)I’ve forgotten ______a pen．A．buy B．buying C．to buy D．buys27、(C)I’m engineer ________repairing your ship．A．charging B．charge of C．in charge of D．in charge 28、(B)We required that the cracks ________by metlock．A．remedy B．remedied C．remedying D．be remedied 29、(A)If you are in a hurry, we can work night _________．A．shifts B．work C．job D．over30、(B)Please give me a _________report and make the necessary endorsement．A．survery B．survey C．servey D．serve 31、(A)It will be valid till the end of _______next year．A．June B．june C．july D．JUNE 32、(C)Would you ________a drink?A．like B．want C．care for D．care of 33、(B)Taking a bus in _______countries is quite different from that in Chain．A．west B．western C．western D．westy34、(D)I think there is ______problem, you can go through．A．nothing B．no anything C．not D．no 35、(C)“What are you” means ________．A．name B．age C．occupation D．sex36、(A)According to your visa, this is not your port _______ entry．A．to B．of C．for D．due37、(B)Then we shall do ______you say．A．like B．what C．for D．as38、(B)Please make 5 pieces more ________the old one as spares．A．like B．after C．as D．follow 39、(B)Since the wear ______limit is 15 percent,this area should be thickened bywelding．A．over B．down C．up D．out40、(C)How much time is necessary to________them?A．over B．out C．cover D．off41、(B)They didn’t use _______tools,you know that is not allowed．A．normal B．special C．abnormal D．specially 42、(C)I am very sorry for that,I’ll_______to it myself at once．A．go B．come C．see D．turn 43、(B)I’ll be there _______time．A．in B．on C．over D．by44、(B)Stop!You see,the bearings have_______hot．A．be B．become C．come D．being 45、(C)I’m the surveyor from X register of Shipping,I’m sent by your _______．A．agency B．agenty C．agent D．agente 46、(B)When the air is compressed, its temperature rises so that it ignites the finespay of fuel _____into the cylinder．A．be injected B．injected C．injecting D．inject47、(B)The operation between two fuel injections is called a working______．A．event B．cycle C．stroke D．power48、(D)In the two stroke engine,each revolution of the crankshaft makes________power．A．a B．two C．three D．one49、(C)These frames are _______as cooling jackets and are provided with verticalflanges enabling them to be bolted together．A．call B．name C．known D．for50、(D)The bedplate in ________cases is of the welded design．A．all B．some C．the most D．most51、(A)Piston skirt and crown are bolted together and fixed to the _______．A．piston rod B．crank C．bedplate D．frame52、(C)The crosshead and crankpin bearings consist of an upper and a lower partsecured to the _______rod．A．connect B．connected C．connecting D．connects53、(B)The various cooling liquids which circulate the engine are themselvescooled by________．A．F．W B．S．W C．L．O D．D．O54、(A)Fuel oil is thought to be one of the main factors having much to do_______the operation and maintenance of an engine．A．with B．for C．of D．at55、(D)A basic part of the cycle of an internal combustion engine is the supply offresh air and ________of exhaust gases．A．move B．out C．off D．remove 56、(D)In cross scavenging the _________ air is directed upwards,pushing theexhaust gases before it．A．coming in B．coming C．in D．incoming 57、(B)In _______to providing lubricating films, oils used in marine diesel enginehave to remove heat from oil cooled pistons．A．order B．addition C．case D．able58、(B)Go ahead for 3 blocks and then turn _______left．A．for B．to C．over D．on59、(C)there is a red ______on my right hand side．A．building B．builds C．builded D．build 60、(C)I’m sorry,we’re _______of this brand．A．lacking B．shorts C．out D．come 61、(B)Do you want to have ______and try it．A．look B．a look C．looks D．looked62、(D)It will ______you at least 3 weeks to do it．A．for B．spend C．pay D．take63、(C)Please fill _______this application．A．up B．over C．in D．on64、(D)You can go through the channel_______”Nothing to declare”．A．marks B．mark C．marking D．marked65、(B)You may choose one of them according ________your case．A．in B．to C．for D．of66、(A)I’ve only brought some ______gifts．A．small B．smlal C．sllam D．smlla67、(B)I’ll go to ______to take my Customs Clearance．A．custom B．customs C．custem D．custam 68、(A)“Where are you_______?”“I’m Chinese．”A．from B．burn C．come D．go 69、(D)“_______are you?” “I’m a sailman．”A．Where B．When C．Who D．What 70、(D)It ______to be all right．A．look B．looks C．seem D．sems71、(A)________is the head of the E．R．A．C/E B．F．W C．M．E D．S．W 72、(A)Full ahead is the _______fast speed．A．first B．second C．third D．fourth 73、(C)“________a nice day．” “You too．”A．Good B．Happy C．Have D．Has 74、(C)“Warm _______the engine” is included in S．B．E．A．over B．of C．up D．down75、(D)_______means finish with the engine．A．S．B．E B．A．B．E C．F．W．C D．F．W．E 76、(B)The word “nice” in “have a nice day” means _________．A．beautiful B．good C．well D．better 77、(C)She seems to ______sick．A．is B．was C．be D．will be 78、(B)Check for leakages and make tight any_______．A．find B．found C．finding D．finded 79、(A)“How do you get there?” “________．”A．By sea B．For sea C．Of sea D．Off sea (D)He broke the glass ________the chair．A．by B．in C．for D．with80、(D)He broke the glass ________the chair．A．by B．in C．for D．with(B)81、___the 5 th every month our ship goes to Japan and leaves there for home on the 23rdA. InB. OnC. AtD. For(B)82、He a chief engineer for 5 years.A.has becomeB.has beenC.have becomeD.become(A)83、How long it take to finish the work tomorrow?A.willB.isC. doD.does(B)84、you the engine trial yesterday morning?A.Did,carried outB. Did, carry outC. Will, carry outD.Had, carried out (C)85、It’s eight o’clock. It’s time check the pressure of the fuel injector.A. forB.inC.toD.at(D)86、tool—box is this ? It’s .A. That, our chief engineerB.whose.our chief engineerC. Who, our chief engineer’sD.Whose, our chief engineer’s(C)87 big the port is !A. How aB. WhatC. HowD.What a(B)88.You don’t check the temperature of the cooling water every hour,____?A.don’t youB.do youC.aren’t youD. are you(C)89.There was something wrong with the main engine and some auxiliary engines. This sentence means _______.A.the main engine and all auxiliary engines went out of order.B.Only the engine was out of order.C.Some auxiliary engines were in good order.D.Something wrong with all auxiliary engines.(C)90.We do repair work with the engineers.Who do repair work ? _____A. WeB. The engineersC. Not only we but also the engineersD.Either we or the engineers(B)91.He ____the repair work these days.A. busy withB.is busy withC.looks busyD. is busy(B)92.We can’t do it ourselves. what a bout ____ the workers to do it for us?A. to askB. askingC.askD.asked(D)93、Our main engine doesn’t work. It ________ .A. out orderB.is out orderC.out of orderD. is out of order(A)94、Where is he putting down all the fingures ?He is putting ____ into the engine room log book.A. them downB.down themC.themD.down(D)95、They are going to disassemble the main engine____.A.for checkB.inspectingC.for inspectD.for inspection(C)96、Shall we connect the motor with the fresh water pump?No, the pump is _____ .A. in goodB.works aellC.out of orderD.must repair(B)97、I’d like to _____some special tools from youA.lendB.borrowC.lendingD.borrowing(A)98、These piston rings are seriously wom-out.You’d better ______ the m at once.A. renewB.to renowC.renewedD.renewing(A)99、The duty engineer has to ____ all the gauges and meters during his watch.A. look atB.look forC.look outD.look after(B)100、We _____ to carry out the engine trial tomorrow morning .A. are wantingB.wantC.are going to wantD.wants二、单词和短语1.main engine 主机2.diesel engine 柴油机3.cylinder cover 气缸盖4. scavenging port扫气口5.exhaust port排气口6.piston rod 活塞杆7.connecting rod 连杆8. control stand 控制台14.turboblower(turbocharger) 涡轮增压器15.propeller 螺旋桨9.spray nozzle 喷嘴10.fuel oil 燃油11.emergency generator 应急发电机12.push button 按钮13.pilot lamp 指示灯14.pressure gauge 压力表15. safety valve 安全阀16.oil separator 分油机17.fresh water generator造水机18.steering gear 舵机19.donkey boiler 副锅炉20.screw-driver 螺丝刀21.electric welding machine 电焊机22.lifting gear 起吊工具23.flash light(electric torch) 手电筒24.fuel oil 燃油25.alternating current (A.C.) 交流电26.motorman 机工27.Dead slow ahead!微速前进!28.Half ahead!前进二!29.Slow astern! 后退一！30.Slow ahead port!左进一！31.hammer 榔头32.chisel 凿子the 车床34.turning tool 车刀35.axe 斧36.scraper 刮刀37.planer 刨床38.saw 锯39.drill钻40.motor 马达41.thermometer 温度计42.speedometer 转速表43.water gauge 水位表44.fuse 保险丝45.windless锚机46.capstan 绞缆机47.motorman 机工48. second officer 大管轮49. chief engineer 大副50. assistant engineer 驾助三：句子翻译1.然后热气体进入燃烧室并通过烟道。
轮机英语试题及答案
轮机英语试题及答案一、选择题（每题1分，共10分）1. What is the term for the main engine of a ship?A. PropellerB. RudderC. EngineD. Boiler2. Which of the following is not a type of marine fuel?A. DieselB. BunkerC. GasolineD. Heavy Fuel Oil3. What does the abbreviation "SOLAS" stand for?A. Society of Legal and Administrative StudiesB. Safety of Life at SeaC. Special Operations and Logistics AssistanceD. Ship Operating and Lifesaving Systems4. What is the purpose of a ship's anchor?A. To propel the shipB. To steer the shipC. To secure the ship when not in motionD. To lift heavy objects5. The term "deadweight tonnage" refers to:A. The weight of the ship's hullB. The maximum weight a ship can carryC. The weight of the ship's cargoD. The weight of the ship's fuel6. What is the function of a ship's bilge?A. To store fresh waterB. To collect and pump out water from the hullC. To provide buoyancyD. To store oil7. Which of the following is a navigational instrument?A. CompassB. Engine roomC. LifeboatD. Anchor8. What is the term for the lowest part of a ship's hull?A. DeckB. HullC. KeelD. Stern9. What does "GM" stand for in ship stability calculations?A. Gross MassB. Gross TonnageC. Gantry MastD. Metacentric Height10. The International Maritime Organization is abbreviated as:A. IMOB. ITUC. ISOD. ILO二、填空题（每题1分，共5分）11. The main components of a ship's propulsion system include the ______, propulsion shaft, and propeller.12. The ______ is the person responsible for the operation and maintenance of the ship's engine.13. The term "freeboard" refers to the distance between the waterline and the ______ of the ship.14. A ship's ______ is the area where the crew lives and works.15. The ______ is a document that provides information about the ship's safety equipment and procedures.三、简答题（每题5分，共20分）16. Explain the difference between a cargo ship and a tanker.17. Describe the role of the International Maritime Organization (IMO) in maritime safety.18. What are the main factors considered when designing a ship's hull?19. Discuss the importance of regular maintenance of a ship's engine.四、论述题（每题15分，共30分）20. Discuss the environmental impact of maritime transportation and how it can be mitigated.21. Analyze the challenges faced by a ship's crew during a long voyage and how they can be addressed.五、翻译题（每题5分，共10分）22. Translate the following sentence into English: “船舶的稳性是指船舶在受到外力作用时，能够保持平衡的能力。
轮机英语教学课件(01) How Does A Marine Diesel
3. That is why a two-stroke diesel engine will theoretically develop twice the power of a four-stroke engine of the same size.
why 引导一个表语从句 E.g. That is why I was late for the meeting.
7. What’s the difference between a 4-stroke engine
and 2-stroke one?
8. What is the advantage of a 2-stroke engine?
9. What is the 2-stroke engine usually used for on
4-stroke diesel engine
Need reduction box between the engine and the propeller to provide a propeller speed of 90-120 rpm
250rpm-750rpm Two revolutions of the crankshaft to make
This term we are going to learn Engineering English. It’s very important for us students to learn it well, so that we are capable of working on oceangoing ships efficiently in the future.
But if we change them into passive voice they will be as follows:
轮机英语多媒体课件
Improve English listening comprehension ability, be able to understand the communication between crew members and the sound of ship equipment operation.
ISM Code: The International Safety Management Code is a set of standards for ship safety management, including the assessment of safety management system, the implementation of safety training, and the monitoring and improvement of safety
01
Operate under the control of the ship's engineer
02
Regular inspection and maintenance to ensure effective operation
Ship systems and equipment
• Types of ship systems and equipment
04
Ship safety management
International Security Management Rules
ISPS Code: The International Ship and Port Facility Security Code is a set of security requirements for ships and port facilities, including the assessment of security management system, the implementation of security measures, and the monitoring and improvement of security performance
轮机英语教学课件(02) Diesel Engine Construction (I)
大型低速二冲程柴油机
Generator 发电机
What are the main parts of a diesel engine?
A diesel engine mainly consists of two parts: the moving parts and the fixed parts.
liners bolted together? 22. Why are there some holes on each
cylinder cover?
8. What is A-shaped frame also called? 9. What is there at the top of the A-frames? 10. How is the scavenging air box built? 11. What’s the function of the chain
PC cylinder liner
新型DS机气缸套
5. In the part of the cylinders inside the scavenging air box, there is a series of openings (known as scavenging air ports). Theses ports are located at such a height that they are just exposed by the upper edge of the piston when the piston is in the bottom dead center position.
Vocabulary
1. bedplate n. 机座
The main engine is fixed on the bedplate.
《轮机英语》试题（二三管轮）含答案
《轮机英语》试题（二三管轮）含答案《轮机英语》考试复习题(二、三管轮)第一章船舶动力装置1.“Before disconnecting the oil pipe, would you flush the oil retained in the pipe?”asked the oil barge owner.A． by using of fresh waterB．with compressed air √C． by using of sea waterD． with chemical compound2.“Stand by an engine” means _____.A．“prepare to stop the engine”B．“assemble an engine on its bedplate”C．“make an engine ready for starting”√D．“dismantle an engine”3. A _____ is the foundation of the engine, without the support of which the shaft alignmentin particular, and engine structure as a whole, would inevitably be lost.A． FrameB．Bedplate √C． CylinderD． Liner4._____ are commonly used in mechanical-hydraulic governor to sense engine speeds.A． BulbsB． BulksC．Flyweights √D． Flywheels5._____ are generally formed in the frame of the both in-line and Vee engines to givemaintenance access to the crankshaft main and connecting rod large end bearing.A．Doors √B． Aspirate gauzerC． CouplingD． Blind6._____ device is provided to prevent starting air from being admitted to the cylinderbefore the reversing is completed.A．An automatic √B． A transmissionC． A self-regulatingD． An interlocking7._____ fuel oils _____ lubricating oils require treatment before passing to the engine.A．Both/and √B． Neither/norD． Both/or8._____ is sometimes used for piston cooling since leaks into the crankcase would not causeproblems.A． Diesel oilB． Hydraulic oilC．Lube oil √D． Mineral oil9._____ is the removal of exhaust gases by blowing in fresh air.A． Gas exchangeB． ChargingC．Scavenging √D． Supercharging10._____ is used for cylinder and cylinder head, the salt water is used for cooling thelubricating oil, the fresh water in the coolers and the charging air in the air cooler.A． The fuel oilB． The lube oilC． The sea waterD．The fresh water √11._____ may be the first possible cause which makes the engine to lose power or slow downwhen it is running.A．Hot bearing √B． Starting valvesC． Unequal distribution of loadD． Excessive crankshaft clearance12._____ of an engine crankshaft can be detected by measuring deflections of crank websfor each unit of the engine.A．Misalignment √B． LengthC． StrengthD． Stresses13._____ of the A-frames there is a strong cast iron frame called the scavenging air box.A．At the top √B． At the bottomC． In the topD． In the bottom14._____ pistons have low inertia and high coefficient of thermal expansion.A． Cast ironB． Cast steelD．Aluminum √15._____ should not undertake any task which will interfere with the supervision dutiesrelating to the main machinery and associated equipment.A．The watch keeping personnel √B． The chief engineerC． The person on a bunker bargeD． Any of the above16._____ the cylinder will contain a great weight of air and will be capable of burninga great quantity of fuel.A．At the beginning of the compression stroke √B． At the beginning of the suction strokeC． At the end of the working strokeD． At the end of the exhaust stroke17._____ the supercharge pressure is, _____ power an engine develops.A．The higher/the more √B． Higher/moreC． Higher/littleD． The higher/the less18._____ is not properly set thus causing either advanced or retarded firing.A． A pistonB．A fuel injection pump √C． A feed water pumpD． A lube oil pump19._____ rods are not in proper condition so that too much fuel is supplied to thecorresponding cylinder.A． PistonB． SoundingC．Regulating √D． Connecting20._____ shows 1.2 meter and the specific gravity of the oil is 0.96According to the measuringscale, that makes 150 tons.A． The piston rodB． The push rodC．The sounding rod √D． The connecting rod21._____ allows for expansion and water make up in the water cooling system.A． A top tankB．A head tank √D． A drain tank22._____ at the end of the distribution pipe ensures that adequate pressure is maintainedby the pump.A． A relief valveB．An alarm √C． A pressure gaugeD． A non-maim valve23._____ is used for washing and drinking.A． The ballast systemB． The salt water systemC． The bilge systemD．The domestic system √24._____ provide the water to the pistons.A． Pneumatic pipesB． Hydraulic pipesC．Telescopic pipes √D． Operating gas pipes25._____ are fitted in the exhaust system and facilitate charge removal and scavenging ineach cylinder.A．Diffusers √B． CompressorsC． Steam boilersD． Soot blowers26._____ are formed by abrasive particles entering the bearing and scoring the shaft.A．Grooves √B． RecessesC． RidgesD． Nips27._____ are mounted on and bolted to the bed-plate cross girders.A． The crankshaftB． The crankcaseC． The guide-waysD．The frames √28._____ is a precaution which contributes to avoiding trouble under normal operatingconditions.A．Constant inspection √B． Keeping constant loadC． Remaining constant temperatureD． varying speed29._____ is a source of power by which the diesel engine may operate.A． Water energyB． Electrical energyC． Chemical energyD．Heat energy √30._____ is arranged for cleaning the lubricating oil in the system and clean oil can beprovided from a storage tank.A． A filterB．A centrifuge √C． A distillerD． A generator31._____ is fully floating in both connecting rod small end and the piston skirt.A． The piston rodB． The cross head pinC．The gudgeon pin √D． The crank-pin32._____ is made of a boss with separated blades mounted into it.A．A variable pitch propeller √B． A variable pitch nutC． A fixed pitch parallelD． A fixed pitch screw33._____ is usually driven by the engine camshaft andsupplies pilot air to the cylinderair start valve.A． An air receiverB． An operating valveC． An automatic valveD．An air distributor √34._____ neutralizes the acid conditions and_____ cleanses the rings and grooves.A． The detergency/the alkalinityB．The alkalinity/the detergency √C． The inhabitant/the waterD． The additives/the distilled water35._____ or air venting arrangement is fitted to the fuel supply passage.A． An air pumpB． A compressorC． A fuel pumpD．A priming √36._____ providing lubricating films, oil used in marine diesel engines have to remove heatfrom oil cooled piston.A． Except forB． BesideC． ExceptD． In additi on to √37._____ the engines, the diesel engine is_____ used engine on board.A． Between/more commonlyB．Among/the most commonly √C． Between/not more commonlyD． Among/not the most commonly38._____ water is more expensive than fresh waterIt has high specific heat and low viscosity.A．Distilled √B． DistillingC． BoilingD． Boiled39._____ for the camshaft gear train is taken from a spur gear which for a six cylinderengine is at the coupling end.A． The driven gearB．The drive √C． The greaseD． The lubricating oil40._____ in what position the engine stops there will always be at least one of the cylinderswith its starting air valve open to admit compressed air to start the engine.A． BecauseB． Owing toC． ForD．No matter √41._____ is secured by means of side-chock bolts and end-chock bolts.A．The bedplate √B． The columnC． The main bearingD． The double bottom42._____ usually helps to induce air movement to assist combustion.A． Cylinder coverB． Main bearingC． The exhaust valveD． The p iston movement √43._____ may have two emergency source of power, thus requiring two emergency switchboards.A．Large passenger vessels √B． General cargo shipsC． Container shipsD． Oil tankers44._____ supplies pilot air to control the cylinder air start valves.A． An air compressorB． An indicator cockC．An air distributor √D． A safety valve45._____ clearances in the main or crank pin bearings will sometimes be indicated by lossof pressure in the lubricating system before any bearing knock is heard.A． T oo largerB． Too smallerC． ExcessD．Excessive √46.A cast steel strong back is fitted in way of the combustion space to help absorb _____.A． flame temperatureB． fuel oilC． air movementD．gas forces √47.A charge of fresh air is drawn into the engine cylinder and then _____ by the movingpiston_____ very high pressure.A． pressed/toB． pressurized/withC． pushed/inD．compressed/to √48.A common trouble with the fuel pump plunger or fuel valve spindle is _____.A． water leakageB． steam leakageC．oil leakage √D． air leakage49.A common trouble with the fuel pump plungers or fuel valve spindle is _____.A． broken downB． stuckC．oil leakage √D． carbonized50.A diesel engine is similar to a gasoline engine except that the former has no _____.A． cross-headB． cylinderC． connecting rodD．spark plug √51.A diesel engines crankcase oil level is found to be too highYou should suspect that _____.A． the engine was over filledB． there might be a fuel leakC． there might be a water leakD． all of the above √52.A distance piece, known as a _____ may be interposed between the rod and the bearinghousing.A． bearing shellB． bearing linerC．compression plate √D． lead wire53.A distance piece, with ground faces, known as a compression plate, may be interposedbetween the rod and the beating housing, its thickness being chosen to ensure the correct _____.A． compression pressureB． compression testC．compression ratio √D． compression clearance54.A distance piece, with ground faces, may be interposed between the rod and the bearinghousing, its thickness being chosen to ensure the correct _____.A． expansion ratioB． pressure ratioC．compression ratio √D． clearance ratio55.A governor automatically controls engine speed by regulating _____.A． fuel s upply √B． firing orderC． engine loadD． oil level56.A gudgeon pin in a trunk piston may be free to float and rotate, with _____ to limitaxial movement.A． split pinsB． crankpinsC． dipsticksD．circlips √57.A heater in the circuit facilitates warning of the engine prior to ____ by circulatinghot water.A．starting √B． stoppingC． to startD． to stop58.A high temperature alarm or _____ which will melt is used to guard against the explosionof compressor air pipelines.A． a flame trapB． a relief valveC．a fusible plug √D． a bursting cap59.A hot air start pipe indicates that there is _____.A． inefficient coolingB．a leaking air start valve √C． a clogged drain valveD． a leaking air bottle60.A level gauge for a tank is to _____.A． give the pressureB．give the contents √C． give the shape of the tankD． give the accuracy level61.A lubricant often has to perform many duties in any situation, in addition to itsfundamental job of_____.A． resisting oxidizationB．reducing friction √C． promoting moving speedD． developing inertia62.A main bearing consists of two shells which are secured by means of studs and _____.A． tie rodsB． through boltsC． lead wiresD．bearing caps √63.A number of cylinder liners are enclosed in one cast iron casing to form a _____.A． cylinder coverB．cylinder block √C． cylinder frameD． bed-plate64.A reduction in load on a diesel engine results in _____ of speed of the crankshaft.A． a reductionB．an increase √C． an outingD． a downwards65.A separate piston cooling system is used _____ any contamination from piston coolingglands to the piston cooling system only.A． to helpB．to limit √C． to protectD． to remove66.A separate piston cooling system is used to limit any contamination _____ piston coolingglands_____ the piston cooling system only.A． between, toB． either, orC．from, to √D． neither, nor67.A single piece_____ fitted with bronze rings guides the piston in the cylinder liner.A．piston skirt √B． piston crownC． guide wayD． cross-head68.A variable pitch propeller is made _____ a boss with separate blades mounted into it.A． ofB．up of √C． fromD． out69.A: Please tell me the specifications and quantityB: _____.A． Pump diesel oil firstB．300 tons of 180 cst fuel oil √C． The figure is all rightD．OK, I’ll sign it70.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 temperature √D． the same as the surrounding temperature71.According to the way the energy of the exhaust gases is utilized, pressure-charging canbe divided into two main systems, namely, the constant-pressure system and _____.A． the pulse-phase systemB． the pulse Doppler systemC．the pulse system √D． the pulse interval72.Acid solution in the system can be tested from time to time by putting some on to a pieceof lime.A．strength √B． denseC． percentageD． velocity73.Additives _____ protective layers on metal surfaces guarding them against corrosion.A． damageB．form √C． dissolveD． contaminate74.Adjust _____ by means of lead wire.A．the clearance of the main bearing √B． the diameter of main bearingC． the gap of main beatingD． the tolerance of main bearing75.Administrations should bear in mind the significance of_____ in maintaining safety oflife and property at sea and in preventing marine pollution.A． advanced nautical equipmentB． advanced performance main enginesC． emergency equipmentD． communicati on and language skills √76.A-frames and cylinder block is held together by _____ to form a rigid structure.A． connecting rodsB． piston rodsC．tie rods √D． jack-bolts77.A-frames are mounted on the bed plate and support _____ and cylinder block.A． the main bearingB． the cylinder coverC．the entablature √D． the sump78.After "F.W.E." is given, the air system is shut down, the _____ gear put in, all drainsand indicator cocks opened, and the cooling water kept running.A． steeringB． timingC．turning √D． running79.After ensuring that the _____ is correct the bearing clearance should be checked.A． napB． gapC．nip √D． deflection80.After fitting back in place the gear wheels, dont forget _____ them.A．to grease √B． greasingC． oilingD． lubricating81.After passing through the turbine the exhaust gas is conducted out into the _____.A． intercoolerB． compressorC． cylinderD．open air √82.After the engine is warned, we should_____ the turning gear before starting up the engine.A． take inB． put inC．take out √D． put up83.After the order “_____” is given, the air system is shut down, the turning gear putin.A．Finished with Engine √B． Stop the EngineC． Stand-by EngineD． Slow-down Engine84.Air cocks, usually positioned at the _____ in a circulating system, is used to get ridof the air in the system.A． bending jointB． expansion tankC． weldD．the highest point √85.All the rings are slightly rounded on their external top and bottom edges to keep theoil film on the cylinder liner during _____ for new piston rings.A． the running-in period √B． the running processC． gas exchange processD． the boiler firing86.All three systems have the ports _____ to swirl the incoming air and direct it in theappropriate path.A． angledB． roundedC． being angledD．being rounded √87.Although the crankshafts of medium diesel engines appear to be robust, they rely on thesupport of _____ to develop their full strength.A． the piston rodsB． the crank throwsC． the thrust bearingsD． the main bear ings √88.Aluminum pistons have _____ coefficient of thermal expansion compared with those of castiron.A．higher √B． lowerC． the sameD． none of the above89.Among the rings of a piston the _____ one is subjected to the greatest load and temperature.A． bottomB． middleC．top √D． none of the above90.An aluminum piston has lower inertia and higher coefficient of _____ compared to thatof cast iron.A． viscosityB． twisting momentsC． inertiaD．thermal expansion √91.An electrically driven automatically operating auxiliary blower is provided for slowspeed and _____ of a low speed diesel engine.A．manoeuvring operations √B． bad combustionC． coolingD． mooring trial92.An increase in load on a diesel engine results in _____ of speed of the crankshaft.A．a reduction √B． an increaseC． an outingD． a downwards93.An interlock in the remote operating valve line stops the valve _____ when the engineturning gear is engaged.A． to openB．opening √C． openD． opened94.An overspeed safety device is usually fitted to a generator engine for _____ in the eventof overspeed.A．cutting power off the engine √B． increasing the fuel pump settingC． braking the crankshaftD． stabilizing the ship speed95.As a heat engine, _____ energy is the source of power by which the diesel engine canbe operated.A． electricB．heat √C． mechanicalD． exhaust96.As for a diesel engine, lack of combustion air may be due to _____.A．fouling turbine √B． fuel pump faultsC． lubrication failureD． excessive cooling97.As the plunger moves up, the ports are closed and the fuel _____ and delivered to theinjector nozzle at very high pressure.A． being compressedB． to be pumped upC．is pressurized √D． are built up98.At least _____ cylinders in four-stroke engine will be configured to ensure that theengine can be started with the crankshaft at whatever position.A．6 √B． 2C． 12D． 899.At the top of the A-frames there is a strong cast iron frame called _____.A． cylinder linerB． cylinder coverC． the gear boxD． the sc avenging box √100.Be sure to make the engine turn by _____ before starting and after stopping.A． steering gearB．turning gear √C． steering wheelD． turning cycle101.Bearing knocks are likely to occur from _____.A． less clearanceB． dirty lube oilC． overloadD．bearing wear √102.Because the castings of smaller engines are not so big and heavy, _____ and cylinder block may be made in one piece.A．the column √B． the jacketC． cylinder coverD． cylinder liner103.Bedplates are the _____ of the engine, without the support of which the shaft alignment in particular, and engine structure as a whole, would inevitably be lost.A． hullB． projectionC． graphitizationD．foundation √104.Before "stand-by" is rung on the engine telegraph, it is usual to give the main engine _____ ahead and astern.A． a brief trial with turning gearB．a brief trial on power √C． a long trial by steering gearD． one minutes trial with windlass105.Before a marine diesel engine is started the cylinders and pistons must be _____.A． cooled to appropriate temperatureB．warmed up gradually to appropriate temperature √C． opened up and renewedD． ground and polished106.Before being used the fuel service tank should be drained of _____.A． soda solutionB． mechanical impuritiesC． ballastD．water and residuals √107.Before pumping up the crankcase oil, _____ should be worked by hand to minimize corrosive action on the liners.B． the starting valvesC．the cylinder lubricators √D． the turning gear108.Before replacing a piston you should check that all rings are _____.A．free √B． fastenedC． brokenD． stuck109.Before replacing a piston you should check the rings to see that all clearances and gaps are _____ the permissible tolerances.A． aboveB． atC． overD．within √110.Before replacing a piston you should check the rings to see that all clearances and gaps are within the permissible _____.A． deflectionB． discrepancyC． errorD．tolerance √111.Before starting the engine the air bottle should be _____.A．pumped up √B． loadedC． dischargedD． opened112.Before starting the turning gear, _____ should be worked by hand to minimize corrosive action on the liners.B． the starting valvesC．the cylinder lubricators √D． the turning gear113.Blow-off of the relief valves of the engines cylinders may be caused by _____.A． too low leadB． water in fuelC． too tight springD．leakage √114.Blow-off of the relief valves of the main cylinders during operation indicates _____.A． the cylinder cover is crackedB． the injector holes is cloggedC．the cams are not properly set √D． fuel pump is leaking115.Bridge gauge can be used to measure _____ of a diesel engine.A．diameters of journals √B． deflections of crankwebsC． diameters of crankpinsD． none of the above116.Care and cleanliness are required when installing diesel fuel filters _____.A． to prevent the fuel system from becoming air-houndB． to prevent the fuel system becoming clogged with dirty particlesC． both of the abo ve √D．to prevent the lubricating oil from leaking out of the filter element117.Cast iron carrier rings, _____ machined grooves, are provided for all the pistons.A．caulked into √B． caulking intoC． pressed intoD． screwed into118.Charging is the filling of the engine cylinder with a supply of _____ for compression.A． waterB．fresh air √C． fuel oilD． gas119.Charging is the filling of the engine cylinder with a supply or charge of fresh air _____ compression.A． to needB．ready for √C． want toD． going to be120.Charging-air pressure increases if there is incorrect combustion and drop in the _____ of the diesel engine.A． machine efficiencyB． machinery efficiencyC．mechanical efficiency √D． mechanics efficiency/doc/5c7732040.html,pressed air is supplied by air compression to _____.A．the air receivers √B． the starting valvesC． the cylinder coversD． the distributors/doc/5c7732040.html,pressed air is used on board ship _____.A． for starting diesel enginesB． in pneumatic control systemC． in pneumatic toolsD．All the above are true √123.Constant cooling the various components of diesel engine has a number of functions except for _____.A． good lubricationB． low thermal stressC． good mechanical propertiesD．acid corrosion √124.Cooling enables the engine metals _____ their mechanical properties.A．to retain √B． to remainC． to maintenanceD． to have125.Cooling of engine is achieved by circulation a cooling liquid around internal passages within the _____.A． boilerB． heaterC．engine √D． cooler126.Cooling of engines is achieved by _____ a cooling liquid around internal passages within the engine.A． flowedB． flowingC． mixingD．circulating √127.Cooling of engines is achieved by circulating a cooling liquid around internal _____ within the engine.A． air。
轮机英语教学课件(09) Starting System
604.The starting air system usually has ___ to prevent starting if anything is not in order.
A. drain cocks
B. vent valves
C. counteracts
D. interlocks
57. ___ supplies pilot air to control the cylinder air start valves.
requirements by Classification Societies.
2. Each cylinder start valve will be opened immediately (after the top dead center position has been passed )
3. Thus, (when compressed air from the main supply is supplied to the starting system of an engine at rest)时 间状语从句 it enters those cylinders 主句(in which the pistons are in a position corresponding to some part of the power stroke)定语从句, the resulting pressure on the pistons causes the engine to rotate. 两者为同位 语,均为结果状语
A. An air compressor indicator cock
B. An
C. An air distributor valve
轮机英语教学课件(05) Fuel Oil System
是谓语动词, impurities 和 water 是本句的宾语, present 是water 的后置定语, to settle to the bottom of the tank 是宾语补足语。
译文：将燃油留在沉淀柜中同时加热降低其黏度，使较重 的杂质和存在于油中的水沉淀到柜底。
(para.5 p33)
这些喷射器上有弹簧加压差动式针阀,可设 定它们以确保在这些阀自动打开让燃油进 入气缸时,燃油上升到足够高的压力以便雾 化.
Questions
1. How can the fuel oil system for a diesel engine be divided?
2. What’s the function of the fuel supply system? 3. Why are steam heating coils must be installed in
• This is the first sentence of Lesson Five, that is to say, without fuel oil an internal combustion engine can’t work at all.
• The work that fuel does in an engine does not only depends upon the fuel oil itself, but also depends upon its working condition, which here means the fuel system.
Vocabulary
1. have much to do with (have a lot to do with) e.g. Viscosity has much to do with the operation
轮机英语题库1201-1400
readily be converted from a liquid into a
vapor, and also from a vapor into liquid with
a reasonably narrow range of pressure?
A. Refrigerator
B. Refrigerant
D. None of the above.
1225 In the process of_____, liquid changes
into gas.
A. evaporation
B. frosting
C. condensing
D. compressing
Jimei University
1226 Since heat will not flow freely from a body at a_____ temperature to another at a_____ temperature, it is necessary to expend mechanical work, heat, or electrical energy from an external source to achieve refrigeration. A. lower/higher B. shallower/deeper C. larger/smaller D. higher/lower
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
transfer does NOT require any physical
contact between a warmer and a cooler
substance?
A. Radiation
B. Conduction
C. Natural convection D. All of the above
1811 Air compressor cylinder un-loaders enable the compressor to_____.
A. vary their speed according to temperature and load
B. start and come up to speed before air compression begins
C. change speed according to overload demands
D. reduce compressed air charge density
1812 Which of the conditions listed will cause a refrigeration compressor to run constantly without simultaneously decreasing the temperature in the refrigerated space?
D. The liquid receiver functions to collect and remove non- condensable gases.
1806 If a refrigeration compressor is running continuously without lowering the temperature in the refrigerated space, the trouble may be_____.
1809 A gate valve installed in a pipeline should be_____.
A. used in either the fully dosed or fully opened position
B. installed with the stem down C. used for steam service only D. used to throttle or regulate the flow of liquid
A. Shortage of refrigerant oil. B. Slight shortage of refrigerant. C. Excessive condenser cooling water flow. D. Faulty expansion valve.
1813 Which of the listed methods of heat transfer takes place when two substances of different temperatures are in physical contact with each other?
A. a shortage of compressor oil B. warm food in the refrigerator C. excessive condenser cooling water D. a shortage of refrigerant
1807 Which of the valves listed should be
A. Radiation B. Conduction C. Convection D. Each of the above
1814 The unloading system on an air compressor will_____.
A. increase compressor discharge pressure on demand
轮机英语题库18012000
1801 By which of the following means is
force efficiently provided to vary the pitch of
the blades on a modem controllable pitch
propeller?
A. Hydraulic
B. Mechanical
Which of the listed statements is correct concerning refrigeration systems?
A. Dehydrators must be used continuously in a refrigeration system.
1810 The movement of heat within a fluid,
caused by the application of thermal energy,
is called_____.
A. radiation
B. conduction
C. convection对流 D. condo-radiation
used either in the fully opened or the fully
closed position?
A. A gate valve 闸门阀 B. A globe valve
C. Any check valve D. Any needle valve
1808 Which of the following modes of heat
B. A 25 ton refrigeration system has the same cooling effect as melting 25 tons of ice in 24 hours.
C. A thermostatic expansion valve is used to control refrigerated space temperature.