甲类三管轮轮机工程基础真题42期

中华人民共和国海事局2007年第2期海船船员适任证书全国统考试题(总第43期)科目：轮机英语试卷代号：805适用对象：无限、近洋航区3000KW及以上船舶二/三管轮（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74题，每题1分，第75题至78题，每题1.5分,第79题至80题, 每题10分。

一、单项选择题1.______ the engines, the diesel engine is ______ used engine on board.A. Between/more commonlyB. Among/the most commonlyC. Between/not more commonlyD. Among/ not the most commonly2.The average pressure exerted on a piston during each power stroke is termed ______.A. indicated horsepowerB. mean effective pressureC. exhaust back pressureD. compression pressure3.The cetane number rates fuels for diesel engines according to its ______.A. antiknock characteristicsB. ignition qualitiesC. rates of vaporizationD. viscosity4.The time between injection and ignition of the fuel is known as ______.A. turbulence lagB. after burning ratioC. pre-ignition lagD. ignition delay5.______ controls the fuel oil temperature in order to provide oil at the correct viscosity forcombustion.A. The viscosity regulatorB. The temperature controllerC. The flow meterD. The pressure switch6.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 corrosion7. A device which functions to bring a diesel engine to a full stop to protect it from damage isknown as a/an ______.A. torque limiterB. over-speed tripC. over-speed governorD. load limit governor8.Engine speeds at which resonance can occur are termed ______.A. maximum speedsB. full speedsC. sea speedsD. critical speeds9.Prolonged operation of a diesel engine with a closed cooling water system at lower than normaldesigned operating temperatures can ______.A. increase power outputB. decrease lube oil viscosityC. eliminate fuel knockD. cause sulfuric acid formation10.______ on a ship transmits power from the engine to the propeller.A. The automatic control systemB. The speed regularly systemC. The transmission systemD. The compression air system 11.In a _____ boiler the hot gases from the furnace pass through the tubes while the water is on theoutside.A. water-tubeB. fire-tubeC. exhaust gasD. composite12.The fuel supply system to an automatic auxiliary boiler, will be automatically shutdown if theboiler ______.A.salinity is abnormallyB.high steam demand is too highC.feed-water flow is lowD.water level is abnormally low13.The water in a steaming auxiliary boiler should be tested daily for ______.A. dissolved oxygenB. chloridesC. sludgeD. dissolved nitrogen14.Ignition failure in an automatically controlled auxiliary boiler could be caused by ______.A. carbon deposits on the flame scannerB. high fuel oil temperatureC. low fuel oil viscosityD. high steam pressure15.The concentration of total dissolved solids in the water of an auxiliary boiler can increase as aresult of ______.A. seawater contaminationB. frequent surface blowsC. dissolved oxygen de-aerationD. frequent bottom blows16.Some pumps use packing as sealing gland. The gland should be ______.A. slack enough to allow slight leakage of fluidB. slightly chockedC. brought up tight so as not to allow any leakageD. fitted with a relief valve17. A spur gear pump should be operated with the discharge valves ______.A. slightly openedB. throttledC. fully openedD. halfway openedpared to globe and angle valves, gate valves ______.A. are more suitable for throttlingB. operate with little or no pressure drop when fully openedC. are more easily repairedD. cannot be used for service requiring infrequent operation19.An increase in rotor clearances in a rotary pump will ______.A. increase discharge pressureB. decrease pump capacityC. decrease pump cavitationD. decrease reaction ring clearance20.The usual symptoms of cavitation in a centrifugal pump is ______.A. noise and vibrationB. an increase in discharge pressureC. an increase in suction pressureD. lifting of the relief valve21.Refrigerant entering the compressor of a refrigeration system should be in which of the followingconditions?A. Sub-cooled liquidB. Sub-cooled vaporC. Superheated vaporD. Liquid22.______is the circulation and refreshing of the air in a space without necessarily a change oftemperature.A. RefrigerationB. Air conditioningC. VentilationD.Heating23.In an air conditioning system, moisture is removed from the air by ______.A. filtersB. separatorsC. ducted trapsD.dehumidifiers24.Sludge may be formed in the oil in the crankcase of a reciprocating air conditioning compressoras a result of ______.A. refrigerant bubbles in the lube oilB. refrigerant reducing the lube oil viscosityC. oxidation of the lube oil from overheatingD. reducing the floc or cloud point of the oil25. A high rate of separation between oil and water is favored by ______.A. large size of oil globuleB. low temperatureC. high viscosityD. high flow rate26.When started, a complete oily water separating unit is first filled ______. The oily water mixtureis then pumped through the inlet pipe into the coarse separating compartment.A. with dirty waterB. with clean waterC. by oily waterD. by mixed water27.Which is the pollution prevention equipment?A. booster pumpB. evaporatorC. incineratorD. cooler28.The ____is used to burn oil sludge.A. clarifierB. oily water separatorC. incineratorD. distiller29.Oil water separators are used to ensure that ships don't discharge oil when pumping out _____.A. ballast waterB. boiler waterC. bilge waterD. sewagewater30.When a clarifier is running the impurities and water collect at the bowl ______.A. centerB. peripheryC. inletD. upper parts31.The separation of impurities and water from ______ is essential for good combustion of dieselengines.A. lube oilB. fuel oilC. turbine oilD. grease32.Brine density in a distilling plant is measured with a/an ______.A. psychrometerB. salinometerC. anemometerD.sphygmomanometer33.The designed ______ is 20 tons per day, but the fresh water generator can only distil 15 tons atpresent.A. displacementB. weightC. powerD. capacity34.______ play a very important part in hydraulic systems by preventing interaction betweendifferent parts of the hydraulic circuit.A. MotorsB. Check valvesC. Safety valvesD.Reducing valves35.In a radial piston pump, reversal and control of fluid flow are accomplished by moving the______.A. central valveB. radial plungerC. floating ringD. cylinderbody36.In a ordinary cargo crane, ______is fitted to rotate the crane.A. the slewing motorB. the luffing motorC. the hoisting motorD. the fan motor37.Which problems can occur if the brake band lining of a wildcat brake becomes excessively worn?A. The driving engine will over-speed.B. The anchor will immediately drop.C. The clutch will overheat.D. The brake's effectiveness will be reduced.38.______ are used for hauling in or letting out the wires which fasten the ship to the shore.A. Cargo winchesB. Mooring winchesC. WindlassesD. Cargo hatches39.Which of the following can be used in hydraulic transmission system?A. Hydraulic oilB. Animal oilC. Light oilD. Fuel oil40.One factor that determines the frequency of an alternator is the ______.A. number of turns of wire in the armature coilB. number of magnetic polesC. strength of the magnets usedD. output voltage41. A DC generator is used to supply direct current in order to maintain an AC generator field and isknown as a/an ______.A. rotorB. statorC. exciterD. armature42.When paralleling two AC generators, the frequency of the machine coming on-line, immediatelyprior to closing its breaker, should be ______.A. slightly less than the oncoming generator frequencyB. the same as the bus frequencyC. slightly greater than the bus frequencyD. the same as the bus voltage43.When securing an AC generator, you should FIRST ______.A. open the generator circuit breakerB. switch the voltage regulator to 'manual'C. decrease the field excitation to minimumD. reduce the load on the unit44. A generator is prevented from becoming motorized by the use of a/an ______.A. over-speed tripB. reverse power relayC. back pressure tripD. governor controls45.The part of the shipboard electrical system used to control the distribution of power to the branchcircuits is the ______.A. bridge control panelB. disconnect linksC. governor relay boxD. main switchboard46.Which of the listed sections of an emergency switchboard is used to supply power for alarmsignals 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 bus47.The separate supplies are connected in either star or delta formation. The star formation is mostcommonly used and requires ______ slip-rings on the alternator.A. twoB. threeC. fourD. five48. A fuse that blows often should be replaced only with a fuse of ______.A. the recommended current and voltage ratingB. higher current and voltage ratingC. higher current and lower voltage ratingD. lower current and higher voltage rating49.The overcurrent relay______ the motor contactor when the motor exceeds its rated current .A. connectsB. tripsC. foulsD. destructs50.Electric circuits are protected against overloads and short circuits by means of a/an ______.A. circuit breakerB. amplifierC. diodeD. capacitor51.Prior to starting an AC generator prime mover, the voltage regulator cutout switch should beplaced in the _________.A. manual positionB. bus neutral positionC. raise voltage positionD. transfer position52.Before M/E putting on the starting air, the reversing and control gear should be _____.A. operatedB. stoppedC. checkedD. removed53.______ is a precaution which contributes to avoiding trouble under normal operating conditions.A. Constant inspectionB. Keeping constant loadC. Remaining constant temperatureD. Varying speed54.After “F.W.E.” is given, the air system is shut down, the _____ gear put in, all drains andindicator cocks opened, and the cooling water kept running.A. steeringB. timingC. turningD. running55.Which of the following must be eliminated to prevent accidents?A. Unsafe actionsB. OrderlinessC. Frequent inspectionsD. Good work habit/practices56. A class …C‟fire would most likely occur in the ______.A. engine room bilgesB. main switchboardC. paint lockerD. rag bin57.The most likely place for a fire to start through the process of spontaneous combustion is in_____.A. an electrical switchboardB. the pressure tanksC. the fuel oil tanksD. the oily rag bin58.While on watch in the engine room, you hear a continuous sounding of the general alarm. Whichof the following actions should you take FIRST?A. Secure the burners then proceed to your assigned boat station.B. Start the fire pump and establish flow to the fire main.C. Open the guardian valve and standby to maneuver.D. Open the master control valves on the fixed CO2 system.59. A fireman's outfit carried onboard cargo vessels, must have a ______.A. canister-type gas maskB. fresh-air breathing apparatusC. self-contained breathing apparatusD. combustible gas indicator60.The safe rate of bunkering heavy fuel oil is directly related to the ______.A. type of fuel transfer pump aboardB. temperature of the fuel oil being receivedC. size of the fuel storage tanks ashoreD. distance from the fuel oil storage tanks ashore61.To anneal a copper gasket, you should heat the gasket ______.A. and quench it in oilB. cherry red and quench in waterC. and let it cool slowly in the airD. and carbonize it62.Preventive maintenance _____.A. should not be carried out during the watches.B. can only be carried out in port.C. is a kind of maintenances carried out prior to the occurrenceD. is a kind of maintenances carried out after the occurrence63.The additional mark _____ in the Classification Certificate for Machinery represents thatpersonnel are watching at engine assembly control station and monitoring all machinery and electronic devices.A. BRCB. MCCC. AUT-0D. AUT-164.Which of the following machinery space operations is required to be logged in the Oil RecordBook?A. Ballasting or cleaning of fuel oil tanks.B. Shifting suction of main fuel pump to reserve fuel oil tank.C. Changing out sprayer plates to adjust for steam demand.D. Daily inspection of engine room bilges.65.The Port Authorities, in accordance with the IMO resolutions have been carrying out _____ toenhance safety of ships.A. CPPB. FPPC. PSCD. FSC66.The fire drill must, as far as practicable, be conducted as if _____.A. there is a minor emergencyB. there is an actual emergencyC. there were a minor emergencyD. there were an actual emergency67.Duties shall be so organized by the chief engineer that the first watch at the commencement of avoyage and the subsequent relieving watches are _____and otherwise fit for duty.A. well trainedB. in good luckC. in good healthD. sufficiently rested68._____ should not undertake any task which will interfere with the supervision duties relating tothe main machinery and associated equipment.A. The watch keeping personnelB. The chief engineerC. The person on a bunker bargeD. The duty deck officer69.At an unsheltered anchorage the chief engineer officer shall consult with _____ whether or not tomaintain an underway watch.A. the engineer officer in charge of watchB. the deck officer in charge of watchC. the masterD. the chief mate70.The term 'oil', as used in the Pollution Prevention Regulations , means ______.A. fuel oil onlyB. crude oil onlyC. liquefied petroleum gasD. petroleum oil of any kind71.In the event of a small bunker oil spill on deck occurring while bunkering, you should ______.A. wash down the area immediately with a fire hoseB. wash down the area with keroseneC. cover the area with absorbent materialD. cover the area with foam72.The SOLAS Convention in its successive forms is generally regarded as the most important of allinternational treaties concerning the ______ of merchant ships.A. pollutionB. economizationC. safetyD. efficiency73.The SMS should provide for specific measures aimed at promoting the_____ of equipment orsystems the sudden operational failure of which may result in hazardous situations.A. visibilityB. abilityC. reliabilityD. capability74.Each ship shall carry on board a ship security plan approved by_____.A. the chief engineer officerB. the master of the shipC. the manager of the companyD. the Administration二、关联题（关联题题干下有4个小题，每小题4个选项）The cooling water in the HT(high temperature) circuit cools the cylinder liners, cylinder heads and turbocharger. From the pump water is supplied to the engine manifold which is cast in the engine block. From the manifold the water is distributed to all cylinder liner sections and from each liner upwards through the cooling water channels in the liner collars. From the liner collars further into the cylinder heads. In the cylinder head the water is forced by an intermediate deck to flow along the flame plate, around the valves to the exhaust valve seats and up along the fuel injector sleeve. From the cylinder head the water is discharged via a connection piece into the discharge manifold.The return water from the cylinder heads and turbocharger is supplied to the HT air cooler.In the first stage of this cooler, most of the heat from the charge air is extracted. The LT circuit water cools the charge air in the second stage. The necessary cooling for the LT water is gained from a central cooler. By controlling the LT water temperature to the inter-cooler the correct charge air temperature can be obtained.For preheating purposes, a heater circuit with a pump and heater are connected in the HT circuit before the engine. Before starting, the HT circuit is heated till about 60℃ by a separate heater The pre-heating of the engine is, prior of starting up and loading on HFO, of utmost importance.75. From the passage we know that the charge air temperature was controlled by ____.A. sea water from a central coolerB. fresh water from a central coolerC. fresh water from a HT circuitD. fresh water from the LT circuit76. The cooling water to cool the engine was forced ______ .A. into the cylinder block and then upwards into the cylinder headB. into the cylinder intermediate section and then upwards into the cylinder headC. into the cylinder head and then downwards into the cylinder blockD. into the cylinder ends and then further into the cylinder intermediate77. After the charge air is discharged into the HT air cooler, _______.A. the charge air temperature will become higherB. the charge air temperature will become lowerC. the HT water temperature will remain constantD. the HT water temperature will become lower78. Which of the following devices may be used to warm the engine prior to starting?A. A high temperature cooling water system.B. A low temperature cooling water system.C. A central cooler.D. The second stage cooler.三、中译英（共2题，请将答案写在答题纸上）79．(轮机日志)检查所有燃油、滑油及冷却水工作液位，所有燃油柜放残。

2008年第6期海船船员适任统考试题（总第46期）科目：轮机维护与修理试卷代号：8731．滑油变质，柴油机主轴承的轴承合金烧熔的故障属于——故障。

A．管理性B．突发性C．磨损性D．渐进性2．船机磨损故障期的特点是A．故障率低B、故障率随时间延长而增加C．时间较长D．故障率随时间延长而降低3．全寿命维修的核心思想是要求产品在————所耗费用最少。

A．全寿命周期内B．使用过程C。

修理阶段D．研制过程4．船舶机械有计划保养系统PMS对耐用型设备、低值设备、非生产型设备采用A．定时维修方式B．事后维修方式C．定期维修十视情维修D。

视情维修方式5．按规定周期结合坞内检验和保持船级的“年度检验”进行的检验修理是——。

A．小修B．航修C．检修D．大修6．为了减小摩擦与磨损．可在摩擦副间加入某种物质，使摩擦阻力降低的措施称之为。

A润滑B．摩擦C。

磨损D．摩擦学7 船舶机器在实际运转中，在、工况时摩擦副难以实现或保持液体动压润滑。

A．起动B．起动、停车C．低速运转D．高速运转8．利用摩擦表面的相对运动产生楔形油膜或挤压油膜来承受外部载荷并隔开摩擦表面，这种润滑称为A．流体动压润滑B．流体静压润滑C．强力润滑D．油脂润滑9．摩擦表面间的机械作用主要表现形式是I、变形11、剪切Ill、挤压Ⅳ、拉伸V、弯曲AⅡ＋ⅢBⅠ+Ⅱ+Ⅲ．C.Ⅰ+Ⅲ+ⅣD．Ⅰ＋Ⅲ＋IV＋V10．在摩擦过程中，运动副工作表面上的氧化膜不断地脱落使运动副零件金属损失的现象是一种磨损。

A腐蚀B．微动C．疲劳D．化学11．影响船机零件磨粒磨损的主要因素有A磨粒B．摩擦副材料C．润滑油粘度D．磨粒和摩擦副材料12．柴油机正常运转时气缸套与活塞环的摩擦表面间可能产生的磨损类型有一。

I、粘着磨损Ⅱ、腐蚀磨损Ⅲ、磨粒磨损IV、疲劳磨损V、微动磨损A．1＋11＋111．B.Ⅰ＋Ⅱ＋ⅤC．Ⅰ＋ⅢD．Ⅰ十Ⅳ＋V13．燃油中含有较高的————是引起气缸套产生磨粒磨损的重要原因。

中华人民共和国海事局2007年第2期海船船员适任证书全国统考试题(总第43期)1. 船舶机械或零部件规定功能的丧失称为______。

A. 损坏B. 故障率C. 故障D. 失效2. 在故障率曲线上故障率较高，但随着使用时间的增加而迅速下降的这段时间称为______。

A. 磨合期B. 磨损期C. 使用寿命期D. 随机故障期3. 为保持或恢复机械设备、系统或零部件规定的使用功能而采取的技术措施称为______。

A. 维修B. 维修科学C. 可靠性D. 可维修性4. 结合坞修和保持船级的“年度检验”进行的定期检修是______。

A. 检修B. 航修C. 小修D. 大修5. 船舶营运中发生局部过度磨损或一般性事故，影响航行安全而船员难于自行修复，必须由船厂修理的工程，是属于______。

A. 小修B. 航修C. 检修D. 事故修理6. 借助牢固吸附在摩擦表面的滑油分子形成一层极薄油膜实现润滑的是______润滑。

A. 边界B. 液体动压C. 液体静压D. 半液体7. 二冲程柴油机十字头轴承一般采用流体静压润滑是因为______。

A. 轴承表面加工精度和表面粗糙度不够B. 无法提供足够的黏度适宜的润滑油C. 配合间隙不符合要求D. 相对运动形式是来回摆动不利于楔形油膜的建立8. 实现流体动压润滑的摩擦表面应具有较高的加工精度和表面粗糙度，以及______。

A. 尺寸精度B. 形状精度C. 配合间隙D. 表面质量9. 衡量气缸套磨损量绝对值的指标是______。

A. 缸径最大增量B. 内径增量C. 圆度D. 磨损率10. 微动磨损是两个______之间发生微小振幅的相对振动引起的机械化学磨损。

A. 相对运动的表面B. 相互配合的表面C. 紧密接触表面D. 接触表面11. 摩擦副表面发生涂抹现象属于______。

A. 腐蚀磨损B. 疲劳磨损C. 磨粒磨损D. 粘着磨损12. 柴油机气缸套与活塞环相对运动时，气缸套工作表面上出现轻微磨损、涂抹、擦伤和撕裂现象称为______。

轮机英语全国统考试题(总第46期)一、单项选择题1. In order to control thermal stresses,some types of modern engines use pistons with .A.heavy wall and intensive coolingB.heavy wall and no coolingC.thin wall and no coolingD.thin wall and intensive cooling2. The average pressure exerted on a piston during each power stroke is termed .A.indicated horsepowerB.mean eff ective pressureC.exhaust back pressurepression pressure.3.The ignition quality of a diesel f uel is indicated by theA.cetane numberB.volatility pointC.viscosity indexD.octane number4.A piston in a f our-stroke/cycle diesel engine makes f our strokes during eachA.crankshaf t revolutionB.mechanical cycle of operationC.period of two combustion cyclesD.cycle of two events5.Crankshaf ts of medium speed engines are f rom a single piece of steel.A.unusually solid weldedB.never be solid f orgedC.almost invariably solid f orgedD.almost invariably be welded6.The start ing air entering the cylinder begins when the piston .A.has nearly come to the TDCB.has just past the TDCC.has nearly come to the BDCD.has just past the BDC7.A main bearing consists of two shells which are secured by means of studs and .A.tie rodsB.through boltsC.lead wiresD.bearing capspared to f our-stroke/cycle engines,two-stroke/cycle diesel engines have the disadvantage of.A.less even torqueB.higher cylinder head temperaturesC.f ewer power strokes per revolutionD.greater weight/size requirements9. controls the f uel oil temperature in order to provide oil at the correct viscosity f or combustion.A.The viscosity regulatorB.The temperature controllerC.The f low meterD.The pressure switch10.In a diesel engine lube oil system,which of the f ollowing parts should be lubricated f irst?A.Camshaf t bearingsB.Main bearingsC.Piston crownsD.Cylinder walls11.A large,low-speed,main propulsion diesel engine uses sea water to directly cool theA.cylinder headsB.exhaust valvesC.scavenging airD.injectors12.In a turbocharger , inlet air velocity is increased in the .A.inlet nozzle ringB.stationary dif f user passagespressor outlet voluteD.rotating impeller vanes13.Each cylinder has one starting valve which is usually opened by air pressure and closed byA.nuts nad boltsB.new jointsC.spring f orceD.sealing rings14.In a simple mechanical governor, theA.centri f ugal f orce rotates the ball-headB.f lyweight centri f ugal f orce is balanced by spring f oceC. f lyweight centri f ugal f orce is balanced by hydraulic pressureD.speeder spring alone actuat es the f uel control rod15. A pyrometer is an instrument commonly used to measureA.cylinder pressureB.f lame intensityC.exhaust gas temperatureD.crankshaf t axial alignment16.Af ter starting a diesel engine,which of the listed operating conditions should be checked f i rst?A.Air box pressureB.Lube oil pressureC.Exhaust temperaturesD.Raw water pressure17.A high temperature alarm or which will melt is used to guard against the explosion of compressor air pipelines. A.a f lame trap B. a relief valveC.a f usible plugD.a bursting cap18. What preventative maintenance should be done frequently to diesel engine starting air receivers?A.Drain the accumulated moisture.B.Test the relief valves.C.Watch the temperature to prevent f luctuations in pressure.D.Clean the interior to remove oil and f oreign matter.19.In reducing engine speed to and eff i cient propeller speed by the use of reduction gears,A.speed and torque are both reducedB.speed is reduced and torque remains unchangedC.speed is reduced and torque is increasedD.speed is sometimes unchanged while torque is increased20.Which of the f ollowing statements concerning f ire-bube boilers is correct?bustion gases f low through the tubes.B.Flames impinge on the tubes.bustion occurs in the tubes.D.Water f lows through the tubes.21.The exhaust boilers are used to recover some of carried in the exhaust gas f rom the main engine .A .water B.oil C.heat D.steam22.The water level in a steaming auxiliary boiler will always .A.rise when the steam pressure is increasedB.remain constant as long as the f eed pump operatesC.f all when the steam pressure is decreasedD.vary as the steam demand changes23.When lighting of f an auxiliary boiler,which of the problems listed could cause the burners to sputter?A.Cold f uel oilB.Low f uel oil pressureC.Low atomizing steam pressureD.Water in the f uel oil24.If the f eed pump f or and auxiliary boiler f ails to deliver the f eed water to the boiler,the cause may beA.high steam pressure in the boilerB.abnormally high f eed-water temperatureC.abnormally high boiler water temperatureD.steam demand exceeding feed pump capacity25.Through a pump,the liquid is transferred from the suction to the discharge by the mechanical variation of the volume of a chamber or chambers.A.positive displacementB.ejectorC.centrif ugalD.air compressor26.Sealing lines provide sealing liquid f low to the stuf f ing box of a centri f ugal pumpA.to prevent seawater from passing out the stuff ing box when a high suction head is presentB.to cool the shaf tC.in place of mechanical sealsD.in place of lantern rings27.Which of the valves listed will be cycled from f ully open to f ully close when the handle is turned 90 degree?A. A rising stem gate valveB.A globe stop valveC.A check valveD. A butterf ly valve28.Centrif ugal pumps,used to handle hot liquids, must have a minimum f low through them under all operating conditions.This f low serves toA.prevent overheating and damage to pump rotating parts due to rubbingB.maintain the net positive suction head of the pumpC.maintain hydraulic dif ferential in the pump impeller passagesD.purge the pump of non-condensable vapors and gases29.If you heard a …crackling‟noise in a centrif u gal pump, the most probable cause of the problem would beA.insuff icient speedB.cavitationC.excess discharge pressureD.excessive net positive suction head30.In the process of,liquid changes into gas.A.evaporation Bf rostingC.condensingpressing31.The device used f or low-pressure control and high-pressure cutout on a compressor is called aA.cutoutB.pressure controllerC.controller switchD.cutout switch32.A purge recovery system is used in a central air conditioning or ref rigeration system toA.purge lube oil f rom the liquid refrigerantB.recover wat er purged f rom the systemC.separate f oul gases f rom the receiverD.purge non-condensabl e gases without losing refrigerant33.In an air conditioning system,low head pressure associat ed with a reciprocating compressor can be the result ofA.broken valve springsB.tight drive beltsC.high line voltageD.air in the system34.When discharging bilge water over board, which criteria must be observed?A.The requirement f or the oil content of bilge water discharged is under 15ppmB.No discharge in sensitive watersC.Any discharge in sensitive watersD.International, national or local requirements have to be observed35.The f ollowing measures can be used to improve oily water separator‟s separating effect exceptA.overhauling every two yearB.working at intervalsC.renewing f iltration materialD.properly heating36.Disposal of all kinds of garbage but listed as below is prohibited within Special Areas.minuted or ground papers, rags, glass, metal etcB.plasticsC.f ood waste comminuted or groundD.Incinerator ash37. When does auxiliary burner of incinerator put into operation?I.start incinerator when it is cold II. Little waste oil f or dealing with III. plenty of waste oil f or dealing with IV the water and impurity in sludge are too much V the temperature in incinerator is low VI dealing with little solid rubbishA.II+III+VB. I+II+III+IVC.I+IV+V+VID.I+II+III+VI38.Bacteria which live are said to be aerobic.A. in the presence of oxygenB.without oxygenC.in the presence of nutritionD.without nutrition39. When centri f uging heavy f uel oil, an important f actor to consider is(are) the .1)f low rate 2)viscosity of thef uel oilA. 1)B.2)C.both 1) and 2)D.Neither 1)nor 2) are correct40.To ensure lube oil purif ier working in normal condition, the interval between two sludge discharging should not exceed hours.A. 2B.4C.5 D641. can not cause oil f low f rom wat er outlet of sel f cleaning purif i er.A. Oil temperature too highB.Diameter of gravity disc too largeC. Oil temperature too lowD.High level tank out of water42. In the production of f reshwat er from seawater through a process of heating and cooling, the cooling phase of production is usually calledA.evaporation BdistillationC.dehydrationD.condensation43.Distilled water f rom an evaporator may be discharged into a potable water tankA. through a detachable hose connectionB.af ter passing through an activated charcoal f ilterC.af ter chemical analysis shows it is f it f or consumptionD.through a solenoid operated three-way valve44.What type of valve is used to direct the f low of hydraulic f luid?A.relief valveB.direction control valveC.stop valverD.pressure control valve45.Cargo hand ling unit is rated according to the to be lif ted.A. cargo craneB.jibC.saf e working loadD.oil pressure46. The crane is usually mounted on a pedestal to effer adequate to the operator. A.time B.spaceC.lengthD.visibility47.Proper internal lubrication of a hydraulic anchor windlass lef t idle f or extended penods can be accomplished by .A.perf orming a chech run on the unit at regular intervalsB.testing the hydraulic f luid f or proper PHC.checking the reservoir f or proper levelD.cleaning strainers at regular intervals48. are used f or hauling in or letting out the wires which f asten the ship to the shore.A.Cargo winchesB.Mooring winchesC.WindlassesD.Cargo hatches49. The major source of chemical contaminants in hydraulic f luid is .A.microscopic steel shavingsB.abrasive wasteC.anti-oxidant compoundsD.oxidation by-products50.If you install a new hydraulic hose in a hydraulic system, the hose must be long enough to allow f or contraction to prevent .A. f ailure of the hydraulic hoseB.excessive f low through the lineC.f riction in other areas of the hydraulic systemD.overheating of the hydraulic f luid51.A cirucit that has one wire in contact with the hull of the ship is aA.series circuitB.grounded circuitC.short circuitD.closed circuit52.The f requency of an alternator at a given r/min is determined by the .A.number of turns of wi re in the armature coilB.number of magnetic polesC.strength of the magnets usedD.output voltage53.The operation of paralleling two alternators requires the voltages to be and also in phase.A.zeroB.eliminatedC.diff erentD.equal54.The f requency of an AC generator is controlled by theA.rheostaternorC.exciterD.capacitor55.A motor enclosure which protects against falling liquids is classif ied asA.water-proofB.drip-proofC.spray-tightD.spray-proof56. are supplied with electricity by main switchboard directly.A.Suez Canal searchlight, air compressor and ai r conditioning compressorB.Air compressor, boiler blower and ref rigeration plantC. Boiler blower , Suez Canal searchlight and ref rigeration plantD.Suez Canal searchlight and boiler blower57. is not installed on the emergency switchboard.A. AmmeterB.V oltmeterC.WattmeterD.Synchroscope58.When two D.C.generators operate in parallel, they are protected against motorizing byA.blow out coilsernor relayC.under voltage tripsD.reverse current trips59.Moisture in a D.C. motor would causeA.short circuitB.speed upC.slow downD.hunting60.The part of a f use that melts and opens the circuit is made ofA.copper and antimonyB.steel and babbittC.aluminum or beryllium alloyD.zinc or an alloy of tin and lead61.The main purpose of an electric space heater installed in a large AC generator is toA.prevent the windings f rom becoming brittleB. prevent moisture f rom condensing in the windings during shutdownC. prevent acidic pitting of the slip ringsD. keep the lube oil warm f or quick starting62.Sparking at the brushes of a running motor could be an indication ofA.normal operationB.a dirty commutatorC.increased brush capacityD.water vapor absorption63. Prior to starting ,the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to \A. test the starting systemB. remove condensation from the cylindersC.check the compressionD.check f or proper lube oil pressure64. During the watch keeping at sea, should be logged or recorded in the engine log book.A.the running hours of the cooling water pumpB.chief engineer‟s orderC.the main parameters of main and auxiliary equipments.D.the position of the vessel65. During ship manoeuvering, when thd diesel is stopped, which of the f ollowing items is wrong?A.keep all systems running normallyB. main engine is available at any momentC.shut off the starting air bottle outlet valveD.pay attention to the changes of the system parameters66.Which of the listed conditions can be considered as the single greatest cause of accidents?A.SpeedB.Excessive knowledge or skillC.Human errorD.Excitement67.On a tank vessel, which of the f ol lowing substances would be burning in a class “B”f ire?A.OilB.WoodC. RagsD.Electrical wiring68.The most likely place f or a f ire to start through the process of spontaneous combustion is inA. an electrical switchboardB.the pressure tanksC.the f uel oil tanksD.the oily rag bin69.Which of the f ire extinguishers listed is to be weighed annually and sent ashore f or recharging if the weight loss exceeds 10% of the weight of a f ull charge?A.FoamB.Soda acidC.Dry chemicalD.Carbon dioxide70.While on watch in the engine room,you hear a continuous sounding of the general alarm.Which of the f ollowing actions should you take f irst?A. Secure the burners then proceed to your assigned boart station.B.Start the f ire pump and establish f low to the f ire main.C.Open the guardian valve and standby to maneuver.D.Open the master control valves on the f ixed CO2 system.71.If there were a f ire in the bunker tanks, you shouldA.close the ventB.pump out the tankC.activate the f ixed CO2 systemD.cut off the heating coils72.To avoid excessive surge pressure when bunkering , you shouldA.bunker at a normal rateB.check f or kinks in hoseC.close valves slowlyD.shut valves bef ore topping off73. ,where minor repairs are carri ed out with a ship in sevice,of ten during a stay in prot. This may be remote from a ship repair site.A.V oyage repairsB.Routine dockingC.Daage repairsD.Conversion74. When is the dock survey carried out ?A.During annual repairually during dock repairC.Bef ore sea trialD.Af ter 5 years f rom last annual survey75.In the initial survey, compiles the survey report and f ills in certif icat e.A.surveyorB.chief engineerC.administratorpany superintendent 76.If an incorrect entry were made in the Oil Record Book, you shouldA.erase the entry and rewrite itB.notif y the ship‟s off icer-in-chargepletely black it out and make the correct entry alongsideD.draw a single line through the wrong entry and initial it.77.The International Oil Pollution Prevention Certif icate is valid f or a period ofA.one year f rom the date of issueB.f ive years from the date of issueC.three years f rom the date of issueD.f our years f rom the date of issue78. Which one is Not the …clear grounds‟f or a more detailed inspection?A. no operation procedures f or the oil separatorsB.engine log book missingC.the master and the chief engineer are unabl e to communicate effectivelyD.absence of an up-date muster list79. The Port State Control off icer may witness a f ire drill carried out by the crew assigned to these duties on theA.Navigation Log BookB.Engine Room Log BookC.Oil Record BookD.Muster List80.STCW 78/95 Convention shall apply to seaf arers on board seagoing ships entitled to f ly the f lag of a Party.A. servedB.servingC.surveyedD.surveying81.The main purpose of port State control is not toA.prevent an unsaf e ship proceeding to seaB.prevent a ship threatening the marine environmentC.f ine the shipsD.conf irm a saf e sailing82.The bridge should inf orm the engine room bef ore passing through congested or shallow waterway.A.24 hoursB.2 hoursC.1 hourD.15 minutes83.When the chief engineer is in the machinery spaces,the officer in charge of the engineering watch shallA.continue to be responsible f or machinery space operations despite the presence of the C/EB. hand over the responsibility to the chief engineer activelyC. be responsible f or the watching together with the chief engineer.D.assistant the chief engineer to contol the machinery.84.According to the international regulations concerning the prevention of pollution of sea areas f rom ships, the disposal into the sea of all plastics isA.welcomeB.admitted in some special sea areasC.prohibitedD.acceptable85.The ship emergency plan item does not include usually.I lif esaving, f ire f ighting II f irst aid III abandon shipA. IIB.IIIC.II IIID.I86. Under ISM Code, the ship to which it applies has to carryA. an International Ship Security Certif icat eB. an International Oil Pollution Prevention Cerif icatC.a Saf ety Managem ent Certif icateD. an International Ballast Water Management Certif icate87. The objective of ISPS Code isA. to protect the marine environmentB. to provide a method to avoid an accidentC. to protect the ship f rom collisionD. to keep terrorism action away f rom ships.88. According to “MARI TIME LABOUR CONVENTION,2006”,The maximum hours of work shall not exceedA.14 hours in any 24-hour periodB. 72 hours in any seven-day periodC.10 hours in any 24-hour periodD.88 hours in any seven-day period二、关联题（关联题题干下有4个小题，每小题4个选项）第一组Port State Control(PSC) is the inspection of f oreign ships in national ports f or the purpose of veri f ying that the condition of the ship and its equipment comply with the requirements of international conventions and that the ship is manned and operated in compliance with applicable international laws.The primary responsibility f or ensuring that a ship maintains a standard at least equivalent to that secif ied in internaitonal conventions rests with the f lag State and if all f lag States perf ormed their duties satisf actorily there would be no need f or port State control. Unf ortunately this is not the case as evidenced by the many marine accidents around the world-hence the need f or additional control.The authority f or exercising PSC is the national law based on relevant conventions. It is theref ore necessary f or a port State to be Party to those conventions and to have promulgated the necessary legislation bef ore exercising PSC. In accordance with the provisions of the applicable conventions,Parties may conduct inspections of f oreign ships in their ports Port State Control Off icers(PSCOs).89.The purpose of PSC is1) to check and inspect f oreign ships 2) to verif y the condition of a ship in compliance with requirements o f international conventions;3)to make sure that the ship is manned and operated well 4)to detain shipsA 1)2) B.2)3) C.1)3) D.123490.Who will be responsible f or ensuring that a ship maintains a standard at least equivalent to that specif i ed in international conventions?A.PSCOsB.Ship ownersC.Flag statesD.Port states91.Bef ore exercising PSC,a port state shouldA.become a contracting Party and promulgate regulations f or implementing PSCB.inf orm ship ownersC.establish proceduresD.inf orm shipping companies92. PSC inspection is implemented by throughA. f lag states/PSCOsB.f lag states/ship ownersC.port states/PSCOsD.port states/ship owners第二组Almost all f ailures in the f uel oil system,including the compression being to low,result in the crankshaf t rotating more slowly if there is a f ailure at one or more cylinders simultaneously. If only one or two cylinders fail, and the engine is not f ully loaded, the crankshaf t rev/min does not decrease, the reason being that the governor ensures that the remaining cylinders are loaded to a correspondingly great er extent. If the engine is already f ully loaded, the cylinders that are working normally become overloaded causing a smoking exhaust and higher exhaust temperatures etc. The load must always be reduced until the f ailure has been located and recti f ied. The reasons f or a cylinder suddenly working at reduced load, or failing completely, may be :1. a def ective or blocked f uel injection valve.2.the f uel oi l pump piston seizing in the barrel. This f ailure can be ascertained by trying to move the pump‟s toothed rack.Defective f uel pumps must be changed.3.the compression being to low because of sticking , worn or broken piston rings.4 leaking inlet or exhaust valves5. no clearance in the valve operation gear.The reasons f or the crankshaf t rotating more slowly, or stopping completely,can also be:1. the f uel oil f ilter being blocked. This f ailure is identif ied by decreasing oil pressure af t er the f uel oil f ilter.2.valve sticking in the open position3.leaking f uel oil pipes or joints.4.water in the f uel oil5.the regulating mechanism being jammed6.the governor not f uncitoning correctly.7the electrical shutdown valve(the monitoring system)being activated.93.This passage is mainly aboutA.the f ailure of reduced rpm.B.the f ailure of the governorC.how to ensure the constant rotational speedD.the reasons f or the f uel system to shut down94.If one or two cylinders fail in f uel oil system the crankshaf t rev/min .1)will invaviably decrease 2)does not decrease 3)will decrease under certain circumstancesA.1B.2C.3D.None of 1 2 3is true95. Which of the f ollowing is NOT mentioned as the reason f or a cylinder suddenly working at reduced load?A.f uel valve f ailureB.f ailure of f uel pump discharge valvesC.too large gaps of piston ringsD.the f uel oil f ilter being blocked completely96.Which of the f ollowing is NO T mentioned as the reason f or the crankshaf t rotating more slowly or stopping?A.changing f rom heavy oil to light diesel oilB.connections leakingC.there being too much waterD.malf unction of the governor 46轮机英语的答案1- 5 DBABC 6-10 BDBAB11-15 CDCBC 16-20 BCACA 21-25 CDDBA 26-30 BDABA 31-35 BDADA 36-40 BCACB 41-45 DDDBC 46-50 DABDA 51-55 BBDBA 56-60 DDDAD 61-65 BBBCC 66-70 CADDB 71-74 ACABA 76-80 DBADB 81-87 CCAC ACD 88-AB 89-92 ~~~~ 93-96~~~~。

【单选】In some cases, when _____ exceeds a pre-set value ,the filter is automatically back flushed with air ,the displaced oil going to auxiliary drain tank where it is subsequently filtered and pumped back into the system A.the differential temperatureB.the differential pressureC.the temperature and pressureD.the pressure【单选】'Insufficiency of manning or insufficiency of certification of seafarers' is an identification of a/an ______.A.substandard shipB.standard shipC.over-standard shipD.reference ship【单选】'Loop,' 'uniflow,' 'crossflow,' and 'return-flow' are terms used to describe various types of ______.A.control air circuitsB.superchargingC.turbochargersD.scavenging【单选】 A DC generator is used to supply direct current in order to maintain an AC generator field and is known as a/an ______.A.rotorB.statorC.exciterD.armature【单选】 A centrifuge arranged to separate two liquids is known as _____.A.an oily water separatorB.a purifierC.a centrifugal compressorD.a clarifier【单选】 A circuit breaker and a fuse have a basic similarity in that they both ______.A.can be reset to energize the circuitB.should open the circuit when overloadedC.will burn out when an over current flow developsD.should short the circuit when overloaded【单选】 A circuit breaker differs from a fuse in that a circuit breaker ______.A.melts and must be replacedB.is enclosed in a tube of insulating material with metal ferrules at each endC.gives no visual indication of having opened the circuitD.trips to break the circuit and may be reset【单选】 A circuit breaker is ______.A.a distribution device B.a lighting equipmentC.the indicating instrumentD.an isolating switch【单选】 A combination combustible gas and oxygen indicator is an instrument that measures the _____ of both combustible gas and oxygen; each is indicated on a separate binationsC.concentrationD.filters【单选】 A diesel engine with a combustion chamber located between the crowns of two pistons is known as a/an ______.A.double-acting engineB.opposed pistons engineC.single-acting engineD.horizontal acting engine【单选】 A fire involving aluminum powder would be a class _________. A.'A' fireB.'B' fireC.'C' fireD.'D' fire【单选】 A hydraulic motor may be driven by ______.A.an electric motorB.a diesel engineC.a compressorD.oil【单选】 A marine diesel engine is started by______.A.supplying high pressure oil into a hydraulic motorB.supplying high temperature air into the cylinderC.supplying high pressure air into the cylinderD.electrical igniting【单选】 A positive displacement pump is that where the volume of the pump chamber is alternately increased to ___ and then decreased to ___. A.draw the liquid in / force the liquid outB.force the liquid out / draw the liquid inC.suction/drawD.deliver/outlet【单选】 A practical way of checking for excessive fuel injection in one cylinder of an operating diesel engine is to ______.A.feel the high pressure fuel lineB.check the cylinder exhausts for white smoke frequentlyC.check the cylinder exhaust temperatureD.isolate each cylinder and inspect the injector【单选】 A segregated ballast system is a system where ______.A.all ballast is processed through the oily water separatorB.ballast is taken on and discharged through a separate main deck riserC.ballast and cargo tanks are separated by cofferdamsD.all ballast lines, tanks, and pumps are independent of those used for oil【单选】 A supercharged diesel engine, when compared to a similar naturally aspirated diesel engine, will develop an increase in ______.A.ignition lagB.engine horsepowerC.lube oil system pressureD.specific fuel consumption【单选】 A viscosity regulator used for an engine is usually provided in order to _____ for an engine burning heavy fuel oil.A.regulate the fuel supplyB.maintain a constant fuel viscosity at the fuel valvesC.maintain efficient coolingD.alter the fuel density【单选】According to STCW, the abilities specified in the standards of competence are grouped as seven functions at three levels of responsibility, which of the following is not one of the three levels?A.Navigational levelB.Management levelC.Operational levelD.Support level【单选】According to the MARPOL CODE, glass, metal and paper materials should ______.A.never be discharged into seaB.be discharged beyond 12 nm from nearest landC.be discharged limited in 12 nm from nearest landD.be discharged to sea【单选】According to the SOLAS convention, the bilge water system ______A.The bilge pump must connect the bilge well suction directlyB.should not pump out the water accumulated in the cargosC.should not be used for emergency drainage in case of ship collisionD.should be connected to the fire fighting system directly【单选】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.A.steeringB.timingC.turningD.running【单选】After 'finished with engine', which of the following cannot be shut off by the duty engineer ?A.fuel oil booster pumpB.the main starting valveC.the sea chestD.the main cooling sea water pump【单选】After taking on fuel oil, the hoses should be disconnected and ______.A.draped over the fantail to dry outB.drained over the side and washed outC.drained into the bilges and washed outD.drained into buckets【单选】Air chambers are usually fitted to reciprocating pumps in order to ___.A.increase discharge pressureB.increase suction vacuumC.develop pulsation flowD.keep a steady rate of flow【单选】All crew's assigned emergency stations can be found on the ship's ______.A.muster listB.certificate of inspectionC.clearance papersD.permit to proceed【单选】All details of fuel bunkering or slop disposal must be entered in the _____.A.rough logB.engine room log bookC.oil record bookD.smooth log【单选】An emergency generator, driven by an internal combustion engine, shall be tested under load for a minimum of 2 hours at least once every ______.A.weekB.2 weeksC.monthD.3 months【单选】An incinerator auxiliary burner can not be ignited. It is NOT caused by______.A.carbon deposits on the electrodesB.defective atomizerC.low oil pressureD.too much water in the oil sludge【单选】An incinerator auxiliary oil-fired burner is used to ignite ______.A.the solidwaste or the oil sludgeB.the solid waste onlyC.the oil sludge onlyD.neither the solid waste nor the oil sludge【单选】Anchor capstans are used in some installation where the cable lifter rotates about a ______. A.horizontal axisB.crankshaftC.vertical axisD.camshaft【单选】As for oil separator, ______contributes to poor separation efficiency and carries over of water into the clean oil outlet.A.A too big gravity discB.A too small gravity discC.The high oil temperatureD.The high speed motor【单选】As the amount of moisture in the air increases, the difference between the dry bulb and wet bulb temperatures will ______.A.increaseB.decreaseC.remain unchangedD.be greatest at dew point【单选】Before doing any work on a hydraulic system equipped with accumulators, you should ______.A.drain the accumulators and purge with oxygenB.bleed off all stored energy from the accumulators completely C.charge the accumulators to prevent system energy lossD.pump the hydraulic fluid into the accumulators to prevent fluid loss【单选】Before starting the engine, the air bottle should be ______.A.pumped up B.loaded C.discharged D.closed【单选】Biological sewage water treatment plant work on the_____.A.heating processB.settling processC.aeration processD.centrifuging process【单选】Cargo handling unit is rated according to the _____ to be lifted.A.cargo craneB.jibC.safe working loadD.oil pressure【单选】Centrifugal pumps, used to handle hot liquids, must have a minimum flow through them under all operating conditions. This flow serves to ______.A.prevent overheating and damage to pump rotating parts due to rubbingB.maintain the net positive suction head of the pumpC.maintain hydraulic differential in the pump impeller passagesD.purge the pump of non-condensable vapors and gases【单选】Coalescence is the breakdown of surface tension between oil droplets in an oil/water mixture, which causes them to join and _____ in size.A.expand B.extract C.increase D.decrease【单选】Combustion gases formed in the cylinder of a diesel engine are prevented from blowing past the piston by ______.A.cylinder pression ringsC.piston skirtsD.oil rings【单选】Cooling of engines is achieved by circulating a cooling liquid around internal ______ within the engine.A.airB.passagesC.pipesD.means【单选】Dual electro-hydraulic steering units usually operate ______.A.with both pumps on line at the same timeB.with one pump on standbyC.with the follow-up gear disconnectedD.only when the rudder is moved amidships【单选】During ______ the gases are driven out of the cylinder by the piston.A.The suction strokeB.The compression strokeC.The expansion strokeD.the exhaust stroke【单选】During purification, if the operating water tank is empty, which of the following malfunctions will appear?A.Some oil will flow from the water outlet of the separator.B.There will be some water in the purified oil.C.Some oil will flow from the sludge outlet of the separator.D.If discharging the sludge, there will be no flushing water.【单选】Each crank is made up of two crank webs joined by a common ______ to which the bottom end bearing is fitted. A.throw B.crankshaft C.crankpin D.crosshead【单选】Each cylinder liner on the marine medium speed engines _____. A.is usually cooled by sea water B.can be replaced when worn out C.is in direct contact with the water in the bore of the cylinder D.can't expand when heated【单选】Electric wires should have each feature of the following except ______.A.flame retardantB.moisture resistantC.oil resistant D.low conductivity【单选】Engine speeds at which resonance can occur are termed ______.A.maximum speedsB.full speedsC.sea speedsD.critical speeds【单选】Equal power factors on paralleled AC generators are maintained by an automatic ________.A.voltage regulatorB.reverse power relayC.reverse current ernor control switch【单选】Failure to open the diesel engine test cocks after a long period of shutdown, prior to starting may result in _______.A.an air bound fuel systemB.damage to cylinder heads and pistonsC.excessive fuel injectionD.excessive air valve lift【单选】Fuel droplets injected into a diesel engine cylinder must have adequate penetration to ______.A.prolong the ignition delay periodB.ensure the beginning of fuel injectionC.thoroughly utilize the air chargeD.allow controlled fuel combustion【单选】Fuel is ignited into a diesel engine cylinder by ______.A.a spark plugB.injectorsC.the heat of compressionD.increasing jacket water temperatures【单选】Full travel of the electronic governor actuator linkage must exceed the ______ travel of the engine fuel control to ensure that the engine fuel control is capable of moving from the 'off' position to 'full fuel'. A.minimumB.averageC.maximumD.half【单选】Heavy residual fuel oils are heated prior to centrifuging to ______.A.reduce fuel weightB.increase specific gravityC.separate fuel from lube oilD.reduce fuel viscosity【单选】How can the chance of contaminating hydraulic fluid be decreased when working on hydraulic systems?A.Clean the fittings before they are disconnected.B.Place drip pans under leaky fittings.C.Seal any cracks in lines with Permatex.D.Coat all threads with graphite oil. 【单选】ISM code has applied to the ships as follows exceptA.Passenger shipsB.Bulk freight vessels of 500 gross tons or moreC.Warship of 500 gross tons or moreD.High-speed craft of 500 gross tons or more【单选】If a cam-controlled engine has a normal injection pressure at rated speed, the injection pressure will be ______ at slow speed.A.a little lower B.a little higherC.too lowD.exactly the same【单选】If a fire ignites in the engine room as a result of a high pressure fuel oil leak, you should FIRST ______.A.secure the ventilationB.find a soda acid extinguisherC.shut off the fuel oil supplyD.secure the generator【单选】If an oil spill occurs on deck, you should ______.A.cover the area with foamB.cover the area with absorbent materialC.wash down immediately with a fire hoseD.wash down immediately with an oil dispersing solvent【单选】If found oil when we open low oil level plug of separator, it indicates _______.A.the separator is overloadedB.the monitor equipment of separator failsC.the discharge pump of separator can not workD.the temperature of oil water is low【单选】If the engine is at rest during maneuver for an extended period the engine should _______, of course, that navigational circumstances permit, before restarting on fuel.A.be turned on airB.be tried on powerC.be turned by the turning gearD.be tested on fuel【单选】If the pump for a hydraulic anchor windlass is overheating, the cause may be ______.A.increased pump speedB.excessive pump discharge pressureC.too low of a tilting box angleD.low pump speed【单选】If the sea water supply pressure for a diesel engine cooling system is below normal, you should check for a ______.A.broken thermostatB.clogged sea water strainerC.blown head gasketD.cracked head【单选】If the speed of a turbocharged diesel engine is maintained constant as the load on the engine is increased, the speed of the turbocharger will ______.A.decrease until the engine speed increasesB.increaseC.decreaseD.remain unchanged【单选】If you heard a 'crackling' noise in a centrifugal pump, the most probable cause of the problem would be ______.A.insufficient speedB.cavitationC.excess discharge pressureD.excessive net positive suction head【单选】Immediately after any diesel engine is started, the engineer should check the ______.A.crankcase pressureB.lube oil pressureC.saltwater pressureD.exhaust temperature【单选】In Maritime Labour Convention, hours of rest may be divided into no more than two periods, one of which shall be at least ___ hour in length, and the interval between consecutive periods of rest shall not exceed 14 hours.A.fourB.fiveC.sixD.seven【单选】In ___ pumps a closed discharge valve will cause bursting discharge pressure.A.centrifugalB.plungerC.injectorD.water【单选】In ______ the control action is independent of the output.A.a closed loop control system B.an open loop control systemC.a boiler control system D.a steering gear control system【单选】In a diesel engine cooling water system, a pH of 6.0 indicates a/an ______.A.slightly acidic conditionB.slightly alkaline conditionC.over-treatment of waterD.neutral condition of water【单选】In a general cargo crane, _____ is fitted to lift the cargo load.A.the slewing motorB.the luffing motorC.the hoisting motorD.the fan motor【单选】In a radial piston pump, reversal and control of fluid flow are accomplished by moving the _______. A.central valveB.radial plungerC.floating ringD.cylinder body【单选】In an air conditioning system, moisture is removed from the air by ______.A.filtersB.separatorsC.ducted trapsD.dehumidifiers【单选】In common rail engines, the fuel is ______ before is injected into the cylinders.A.stored in a common fuel lineB.pumped by the injection pumpC.at low pressureD.already atomized【单选】In some diesel engine designs, the injection of cylinder oil is timed to impinge when the piston is coming upward and only impinge on ______.A.piston skirtB.piston crownC.piston ring belt.D.cylinder ring belt【单选】In the Oil Record Book, a comprehensive list of operational items are grouped into operational sections. Each section is codified by a/an ______.A.numberB.abbreviationC.letterD.number、abbreviation and letter【单选】In the electronic governor actuator, the oil pressure is provided by a ______ pump driven by a shaft connected to the engine camshaft.A.servomotorB.hydraulic motorC.gearD.volute【单选】In the event of a small bunker oil spill on deck occurring while bunkering, youshould ______.A.wash down the area immediately with a fire hoseB.wash down the area with keroseneC.cover the area with absorbent materialD.cover the area with foam【单选】In the event of minor emergencies when the machinery spaces unattended, ______ will be informed of malfunctions in the machinery by his cabin monitor.A.the chief engineerB.the engineer on cabin watchC.the bridge officer on watchD.the master【单选】In the production of freshwater from seawater through a process of heating and cooling, the cooling phase of production is usually called ______.A.evaporationB.distillationC.dehydrationD.condensation【单选】Increasing the temperature of a fuel will _____ its viscosity, and vice-versa.A.increaseB.not changeC.reduceD.add【单选】It ______ for an emergency generator to require paralleling.A.is usual B.is not usualC.is necessaryD.is not impossible【单选】It is important to note that when an excessive amount of water is present in the fuel the temperature for centrifuging must be kept below ______, otherwise forming and agitation of the fuel takes place.A.the condensating point of waterB.the boiling point of waterC.the flash point of the fuelD.the flammable point of the fuel【单选】It is possible to mount a double suction centrifugal pump impeller with the vanes facing in the wrong direction. This would cause the pump ______.A.head capacity to improveB.discharge to be reversedC.efficiency to decreaseD.slippage to decrease【单选】Leakage of hydraulic fluid from around the shaft of a hydraulic motor may be caused by ______.A.permanent loss of pump suctionB.worn shaft sealsC.high level in the oil sumpD.low motor RPM【单选】Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an ______.A.over-speed tripB.audible/visual alarmC.the ships/boats general alarmD.reserve oil storage tank【单选】Maintaining the lowest possible scavenging air temperature at all times is not recommended due to the possibility of the ______.A.air charge density becoming too highB.piston crown surfaces becoming too coldC.formation of excessive quantities of pression pressure being greatly reduced【单选】Maximum pressure readings should be taken when the engine is running on ______ as steadily as possible.A.half loadB.full loadC.average loadD.minimum load【单选】Motor controllers are seldom troubled with grounds because ______.A.the auxiliary contacts have a high resistance connectionB.the contactors and relays are mounted on a non-conducting panelC.the resistor banks are composed of individual series-connected unitsD.there are separate switches for the motor and the control【单选】Noxious emissions amount to 0.25～0.4 percent by volume of the exhaust gas, depending on the amount of ______ in the fuel and its lower heat value, and the engine type, speed and efficiency.A.carbonB.sulphurC.oxidD.water【单选】Over-greasing of ball bearings installed on pumps will result in ______.A.smoother pump operationB.overheating of the bearingC.reduced corrosion in the bearingD.increased pump capacity【单选】Owing to its __________, the low speed cross-head diesel engine is widely used on board ship as a main engine.A.smaller size and simple constructionB.long life, lower cost and reliabilityC.easier operation and managementD.simple construction and easier management【单选】Prior to closing the breaker when paralleling two AC generators, the recommended practice is to have the frequency of the incoming machine ______.A.slightly less than the line frequencyB.the same as the line frequencyC.slightly greater than the line frequencyD.have nothing to do with the line frequency【单选】Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to ______.A.test the starting systemB.remove condensation from the cylindersC.check the compressionD.check for proper lube oil pressure【单选】Reheating a hardened component to a temperature lower than the hardening temperature and then cooling it is known as ______.A.low temperature hardeningB.case hardeningC.annealingD.tempering【单选】Remote control means that _____ .A.the system is manned manuallyB.the system is situated remotely from the operatorC.the system is controlled automaticallyD.the system is controlled from the bridge【单选】Restrictions occurring in the small orifices of pneumatic control system components can be caused by ______.A.moisture in the compressed air supplyB.excessive dryness in the compressed air supplyC.pressure surging in the compressed air receiverD.insufficient lubrication of the system components【单选】STCW Convention describes that _____ are laid down for the certification of engineer officers in charge of a watch in a traditionally manned engine room, or the designated engineer in a periodically unmanned engine room. A.available minimum requirementsB.available maximum requirementsC.mandatory minimum requirementsD.mandatory maximum requirements【单选】STCW Convention states that the officer in charge of the engineering watch is the _____ representative.A.ship-owner'sB.master'sC.chief engineer'sD.manager's【单选】Safe working conditions inside the crankcase are ______, especially for large bore engines where the components are quite heavy.A.reliableB.safetyC.easyD.important【单选】Seawater can be used for drinking ______. A.at a maximum rate of two ounces per dayB.after mixing with an equal quantity of fresh waterC.if gather during or immediately after a hard rainD.under no circumstance【单选】Smaller equipment may be supplied via ______ or miniature circuit breakers.A.exciters mutatorsC.fusesD.wattmeter【单选】The Abbreviation "ERM" in the Manila Amendments to the STCW Convention stands for ______.A.Engine Room ManagementB.Engine Resources ManagementC.Engineer Resources ManagementD.Engine-room Resources Management【单选】The ISM Code is a part of ____.A.SOLASB.MARPOLC.STCWD.Ballast Water convention【单选】The International Management Code for the Safe operation of ships and for Pollution Prevention is referred to as _______.A.ISM CodeB.IOPP CodeC.IMS CodeD.ISPS Code 【单选】The Port Authorities, in accordance with the IMO resolutions have been carrying out _____ to enhance safety of foreign ships.A.CPP B.FPP C.PSC D.FSC【单选】The SMS should provide for specific measures aimed at promoting the_____ of equipment or systems, the sudden operational failure of which may result in hazardous situations.A.visibilityB.abilityC.reliabilityD.capability【单选】The ______of the telemotor is mounted on the steeringgear.A.transmitterB.receiverC.pipesD.charging unit【单选】The ability of lubricating oils to resist viscosity changes during temperature changes is indicated by the ______.A.American Petroleum B.Institute number viscosity index numberC.Seconds Saybolt Furol numberD.Seconds Saybolt Universal number【单选】The activated sludge strength should be checked at regular intervals, and it is good that the color of the aeration compartment water is ______.A.chocolateB.yellowC.blackishD.ivory-white【单选】The air distributor is conventionally driven by ______ and distributes ______ into each cylinder by certain sequence.A.camshaft / fresh airB.camshaft / starting airC.electronic motor which is controlled by a computer / fresh airD.electronic motor which is controlled by a computer / starting air【单选】The burning of ______ is a class‘C’fire.A.diesel oilB.magnesiumC.dunnageD.electrical insulation【单选】The capacity of the supply pump to the separator should correspond with the recommended throughput, or it must be adjusted without the risk of ______ formation.A.sludgeB.emulsionC.oil runoutD.deposit【单选】The clutch band of a constant tensioning mooring winch must be set up tight enough to drive the winch drum and should slip only when ______. A.excessive loads are placed on the winch B.minimum pull is being exerted by the winch C.automatic operation of the winch is desired D.wire is being retrieved at the maximum rate【单选】The cooling water jacket is common to all the cylinders but there are often ______ to ensure that each cylinder receives the right amount and flow of water. A.dividing walls B.divided walls C.dividing liners D.divided jackets【单选】The descriptions about cetane number are TRUE except ______.A.Cetane number indicates ignition qualityB.The lower value the cetane number is of, the poorer the ignition quality will beC.Cetane number isn't the only measurement of ignition quality.D.Cetane number is measured by Redwood instrument【单选】The device that most commonly utilizes the principle of electromagnetic induction is the ______.A.diodeB.transformerC.transistorD.rheostat【单选】The engineer officer in charge of the watch shall ensure that ______are kept under constant surveillance.A.the devices and systems in chargeB.the communication devicesC.the main propulsion plant and auxiliary systemsD.the steering gear【单选】The expansion tank for a diesel engine closed cooling system is designed to maintain a constant head on the system and ______.A.reduce water temperatureB.reduce water turbulenceC.provide an air cushionD.allow for an increase in water volume as the engine warms up【单选】The extended aeration process consists of _____ the liquor either by bubbling air through it or by agitating the surface.A.deoxygenating B.oxygenatingC.chemicalizingD.disinfecting【单选】The frequency output of an operating alternator is controlled by the ______.A.relative speed of the rotor polesB.number of turns of wire in the armature coilC.strength of the magnets usedD.output voltage【单选】The instrument which the emergency switchboard doesn't need is ______.A.ammeter B.voltageC.wattmeterD.synchronous meter【单选】The load sharing characteristics of two diesel generators operating in parallel are mostly dependent on their governor ______.A.load limit settingsB.idle speed settingsC.speed limit settingsD.speed droop settings【单选】The lubricating oil purifier may ______ oil from the drain tank and ______ the clean oil into the supply line.A.take; takeB.discharge; takeC.discharge; dischargeD.take; discharge 【单选】The magnetic field is provided by electromagnets so arranged that adjacent poles have ______.A.opposite polarityB.the same polarityC.negative polarityD.positive polarity 【单选】The main objective of ISPS Code is ______.A.to prevent the human injury and the loss of lifeB.to specify the measures to enhance maritime securityC.to avoid the damage to the environment, particularly to the marine environmentD.to ensure the compliance with conventions【单选】The main objective of the SOLAS Convention is ______.A.to specify minimum standards for the construction, equipment and operation of ships.B.to specify minimum standards for the training, certification and watch keeping for seafarers.C.to provide minimum standards for the operation of vessels.D.to tell the company how to run the business.【单选】The majority of automatic mooring winches are _____ to improve the backward efficiency of the gear train for rendering.A.spur gearedB.screw gearedC.worm gearedD.belt driven【单选】The most critical part of the bunkering operations, which can result in an oil spill, is when the ______.A.hose joints are made upB.tanks are being topped offC.system is being lined upD.pumping operation is first started【单选】The officer in charge of an engineering watch shall have the knowledge of ERM principles, including obtaining and maintaining ______.A.situational awarenessB.safety awarenessC.environmental awarenessD.anti-pollution awareness【单选】The officer in charge of the engineering watch shall ensure that at all times bridge orders relating to changes in _____ of operation are immediately implemented. A.ahead or astern B.fore or aft C.up or down D.speed or direction【单选】The only means of removing the latent heat of condensation from a refrigerant in the normal refrigeration cycle is by ______.A.passing it through the expansion valveB.condensing refrigerant in the system condenserC.passing the gaseous refrigerant through the heat interchanger on the suction side of the compressorD.maintaining a high pressure on the system's receiver【单选】The operator of electrical motors should keep a constant check on the loads they carry because ______.A.low loads necessitate frequent insulation cleaningB.exceeding nameplate values shortens useful lifeC.energy is wasted if full loading is not utilizedD.power factor correction methods are load dependent【单选】The overcurrent relay _____ the motor contactor when the motor exceeds its rated current.A.connectsB.tripsC.foulsD.destructs【单选】The part of a fuse that melts and opens the circuit is made of ______.A.copper and antimonyB.steel and babbittC.aluminum or beryllium alloyD.zinc or an alloy of tin and lead【单选】The piston rod scraper box incorporated in a two-stroke/cycle, crosshead diesel engine serves to ______.A.eliminate the necessity for an oil scraper ringB.prevent side thrust and cylinder scoringC.prevent sludge and dirty oil from entering the crankcaseD.scrape oil。

船舶辅机三管轮模拟试卷单项选择题：1．下列泵中排压力增大，轴承径向力不加大的是：A 往复泵B 单作用叶片泵C 单作用水环泵D 导轮式离心泵2．下列泵中不适合输送污浊液体的是：A 往复泵B 叶片泵C 单螺杆泵D 离心泵3．采用（）流道的旋涡泵不具有自吸能力。

A 闭式B 普通开式C 向心开式D 带辅助闭式4．下列泵中不采用特殊措施不具备自吸能力的是：A 水环泵B 开式旋涡泵C 叶片泵D 离心泵5．下列泵中额定排压（或压力比）与转速有关的是：A 往复泵B 螺杆泵C 水环泵D 齿轮泵6．下列泵中排出压力增大，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7．往复泵安装排出空气室后变得均匀的是（）的流量。

A 吸排管路中B 泵与空气室之间C 泵吸入D 排出管路中8．齿轮泵工作时主动与从动齿轮：A 不受径向力B 受相等的径向力C 前者所受径向力较大D 与C相反9．内齿轮泵中齿轮与齿环的转速：A 前者大B 后者大C 相同D A或B 10．回转泵启动前灌液最主要的原因是：A 提高自吸能力B 降低噪音C 减小启动功率D 防止干摩擦造成严重磨损11．开式旋涡泵是指：A 泵与电机不在同一壳体内B 流道两端都有直通吸排口C 叶轮无中间隔板或盖板D 流道有一端至通吸口或排口12．喷射泵的喉嘴距过小将导致：A 工作水耗量增加B 与A相反C 引射流量过多，效率下降D 引射流量过少，效率下降13．喷射泵的喉嘴距是指喷嘴出口至（）截面的距离。

A 混合室进口B 混合室出口C 混合室圆柱段开始处D 引射的圆锥流速与混合室相交处14．泵的有效功率大小取决于：A 工作压力B 流量C 转速D A与B的乘积15．泵工作中实际能达到最大吸高随（）降低而降低。

A 吸入管阻力B 吸入液面压力C 泵的流量D 水温16．泵的扬程主要耗用于下列各处，但与（）无关。

A 克服排出管路阻力B 制造泵内填空C 克服吸排液面压差D 提升液面至一定高度17．（）并不影响水泵的吸入压力。

海船船员适任证书全国统考试题（总第41-42期）科目：海上货物运输1. 当船舶由海水水域进入半淡水水域时______。

A. 首吃水增加，尾吃水增加B. 首吃水增加，尾吃水减少C. 首吃水减少，尾吃水增加D. 首尾吃水均减小1. 船舶在设计时使用的尺度为______。

A. 船型尺度B. 理论尺度C. 实际尺度D. 最大尺度2. 船舶总载重量一定时，船舶的净载重量NDW与______无关。

A. 空船排水量B. 航线长短C. 船舶常数D. 油水储备2. 由舱容系数的定义可知，舱容系数较大的船舶，适合装运______货。

A. 轻B. 重C. 袋装D. 中等3. 在货源充足且船舶吃水不受限制的条件下，当船舶的舱容系数小于货物的平均积载因数时，则可达到：A. 满舱满载B. 满舱不满载C. 既不满舱又不满载D. 满载不满舱3. 某船靠泊于使用北大西洋载重线的港口，该港水密度为1.005g/cm3, 则试由右图判断该轮离港时最高允许的水线应为：A. 水线BB. 水线CC. 水线AD. 以上均错4. 某轮平均吃水为4.7m（TPC=8.5t/cm），因卸货，平均吃水变为4.2m（TPC=7.9t/cm），则卸货量为：A. 735tB. 624tC. 569tD. 410t4. 海运货物的自然损耗是指在运输过程中因______因素的影响而产生的货物重量上不可避免的减少量。

①货物本身的性质②自然条件③运输技术A. ①B. ②C. ③D. ①②③5. 如果船舶整个航程多次变更载重线，则：A. 每到达一个新航区均应重新计算所适用的载重线B. 各航区应分别确定载重线C. 在各航区水线均不得超过出发港的水线D. 只要在各航区满足其相应载重线的要求即可5. 普通干散货船的航次储备量ΣG包括：①燃润料和淡水②供应品③船员和行李及备品A. ①②B. ①③C. ②③D. ①②③6. 装货清单上drms缩写符号表示______包装形式。

中华人民共和国海事局适任培训大纲熟悉训练04科目：主推进动力装置适用对象：750kW及以上船舶二/三管轮1、轴系中心线同轴度偏差符合标准的要求,判断的标准是()A、偏移值δ曲折值Ψ在允许值内B、总偏移值δ总，总曲折值Ψ总在允许值内C、交点在δ总Ψ总坐标三角形以内D、交点在δ总Ψ总坐标三角形以外答案： C2、在控制柴油机的燃烧过程时应力求A、减小喷油提前角B、缩短滞燃期C、增大喷油提前角D、缩短主燃期答案： B3、气缸体与机架一体组成机身的这种结构形式多用于A、大型柴油机B、中小型柴油机C、四冲程柴油机D、二冲程柴油机答案： B4、开式燃烧室的优点之一是()A、过量空气系数小B、能量损失小C、平均压力增长率低D、热负荷低答案： B5、含()较高的合金铸铁耐磨性好，可用于中、髙速柴油机气缸套A、磷B、氮C、硅D、铝答案： A6、非金属材料包括()A、高分子材料、陶瓷材料B、高分子材料、复合材料C、复合材料、陶瓷材料D、高分子材料、陶瓷材料、复合材料答案： D7、柴油机的活塞平均速度Vm和行程S、转速n之间的关系应符合A、 Vm=30 x n x SB、 Vm x S=30 x nC、 Vm x n=30 x SD、 Vmx30=n x S答案： D8、四冲程柴油机排气阀在()关闭A、上止点前B、上止点后C、下止点前D、下止点后答案： B9、拂刮厚壁主轴瓦的目的是为了A、调整轴承间隙B、调整臂距差C、提高接触质量D、使表面光滑答案： C10、关于承磨环的不正确说法是()A、专为活塞与气缸的磨合而设置B、承磨环分为几段，并用青铜材质C、当承磨环磨平时应予以换新D、某些大尺寸的筒形活塞有时也装承磨环答案： C11、检查油润滑尾轴承密封装置防蚀衬套的密封性通常采用()的方法A、油压试验B、水压试验C、磨合试验D、运转试验答案： B12、十字头式柴油机所采用的箱形机架的侧板上开有检修道门，通过它可以检查（）的工作状况。

中华人民共和国海事局2006年第2期海船船员适任证书全国统考试题（总第40期）科目：轮机工程基础试卷代号：822适用对象：750KW及以上船舶二/三管轮（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：本试卷试题均为单项选择题，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。

每题1分，共100分。

11.根据下图所示的左视图和俯视图，选择正确的主视图。

1. 装配图中，运动极限位置轮廓线应用 ________ 线表示，而相邻辅助零件轮廓线应用_________ 线表示。

A.双点划/双点划B.点划/双点划C.双点划/虚划D.双点划/点划2. 物体的三视图是一个物体的三面投影，简单来说，就是：A.高对正、长平齐、宽相等B.长相等、高平齐、宽相等C.高对正、宽平齐、长相等D.长对正、高平齐、宽相等3. 物体在正立投影面（V）上的投影，称为_________ 。

A.主视图B.俯视图C.左视图D.侧视图4. 关于三视图中的主视图，说法正确的是：A. 表示物体的正面形状投影，反映了物体的长度和高度B. 表示物体的顶面形状投影，反映了物体的长度和宽度C. 表示物体的左面形状投影，反映了物体的高度和宽度D. 表示物体的底面形状投影，反映了物体的长度和宽度5. 在三视图中，物体的后面对应于左视图的 _________ 。

A.上方B.下方C.左侧D.右侧6. 投影面的平行面中，不包括 _______ 。

A.水平面B.侧平面C.正平面D.正垂面7. 在三投影面体系中，若物体上的直线垂直于水平面，则该直线为______ ，在______ 投影为反映实长的竖线。

A.铅垂线/侧立面B.水平线/正立面C.侧垂线/水平面D.铅垂线/水平面8. 若图样上机件的线性尺寸是实际机件相应线性尺寸的1/5，则在标题栏中的比例标注应是：A. 5 : 1B. 1 : 5C. 1 /5D. 5 比19. 根据下图给出的主视图和左视图，选择正确的俯视图。

三管轮机英语41-48期经整理中华人民共和国海事局2006年第3期海船船员适任证书全国统考试题(总第41期) 科目：轮机英语试卷代号：805 适用对象：无限、近洋航区3000KW及以上船舶二/三管轮（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74题，每题1分，第75题至78题，每题1.5分,第79题至80题, 每题10分。

一、单项选择题1.An exhaust gas bypass is installed on a waste heat boiler in order to ______.A. bypass exhaust gas at high loads to prevent excessive back pressureB. bypass a portion of the exhaust gas at peak loads for better efficiencyC. recycle exhaust gas to the turbochargerD. minimize moisture condensation in the boiler gas passages at low loads2.Flame failure in an automatically fired auxiliary boiler can mostly result from a/an ______.A. incorrect electrode settingB. incorrect nozzle positionC. clogged fuel nozzleD. broken high tension lead3.Which of the following modes of heat transfer does NOT require any physical contact between a warmer and a cooler substance?A. RadiationB. ConductionC. Natural convectionD.Contact directly4.In a chilled water air conditioning unit using a reciprocating compressor, therefrigerating effect of the primary refrigerant can be increased by ______.A. increasing refrigerant pressure in the coilB. increasing chilled water flow through the coolerC. sub-cooling the refrigerant in the condenserD. superheating the refrigerant in the compressor5.In a general cargo crane, ______is fitted to lift the cargo load.A. the slewing motorB. the luffing motorC. the hoisting motorD. the fan moter二. 关联题（关联题题干下有4个小题，每小题4个选项）With many small package boilers, the automatic control sequence usually ensures that the boiler fire is initially ignited from a diesel oil supply, and changed over to the usual source when ignition is completed. With good management, to facilitate subsequent starting from cold, the fuel system of large boilers will have been flushed through with diesel oil when the boiler was on light duty immediately prior to being secured. When burning such diesel fuel it is essential for safety that only the correct (small) burner tip should be used. It should be kept in mind that if fire does not light, immediately shut off fuel and vent furnace.Complete ignition of fuel in the furnace is essential. The burner flame, the smoke indicator and the funnel should befrequently observed. With satisfactory combustion, the flame should appear in candescent （白热的）with an orange shade at the flame tip, and a faint brownish haze should show at the funnel. If on first ignition the flame is uncertain, badly shaped and separates from the primary swirler, momentary opening or closing of air register may correct.75. Small package boilers will use ____C___ while being lit up.A. the usual source of oilB. fuel oilC. diesel oilD. mixture of fuel oil and diesel oil76. After large boilers being secured, the fuel in the feeding line will be__C__.A. the usual source of oilB. fuel oilC. diesel oilD. mixture of fuel oil and diesel oil77. If large boilers were not lit up, __B___.A. feed water to normal levelB. stop fuel supply immediately and purge the furnaceC. light the boiler againD. reset the burner78. An indication for a good combustion is ___C___.A. white smokeB. brown haze in the funnelC. orange flame tipD. swirl oil spray中华人民共和国海事局2007年第1期海船船员适任证书全国统考试题(总第42期)科目：轮机英语试卷代号：805适用对象：无限、近洋航区3000KW及以上船舶二/三管轮（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。