甲类三管轮轮机工程基础真题34期
甲类三管轮轮机工程基础真题31期
中华人民共和国海事局2003年第2期海船船员适任证书全国统考试题（总第31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，请选择一个最适合的答案，并将该答案按答题卡要求，在其相应的位置上用2B铅笔涂黑，每题1分，共100分。
1.当粗实线与虚线重叠时，应画______线；虚线与点划线重叠时，应画______线。
A. 粗实／虚B. 粗实／点划C. 点划／粗实D. 虚／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. 在正投影法中，当空间的平面垂直于投影面时，则其在投影面上的投影将：A.为缩小的类似形B.积聚成一条线C.为放大的类似形D.反映实形4. 关于三视图中的主视图，下面说法中正确的是：A. 表示物体的正面形状，反映了物体的长度和高度。
B. 表示物体的顶面形状，反映了物体的长度和宽度。
C. 表示物体的左面形状，反映了物体的高度和宽度。
D. 表示物体的底面形状，反映了物体的长度和宽度。
5. 主视图能反映物体的______位置，但不能反映物体的______位置。
A. 上、下/ 左、右B. 左、右/ 上、下C. 前、后/ 上、下D. 上、下和左、右/ 前、后6. 在三视图中，若正四棱柱的前棱面平行于正立面，顶面平行于水平面，则其左侧棱面在正立面上的投影______。
A. 反映实形B. 积聚成横线C. 积聚成竖线D. 为缩小的类似形7. 正平线的V面投影为______，H面投影为______，W面投影为______。
A. 斜线/ 横线/ 横线B. 横线/ 横线/ 竖线C. 斜线/ 横线/ 竖线D. 斜线/ 竖线/ 横线8. 若正六棱柱的顶面为水平面，一个棱面为正平面，则其左视图为______。
2021海船船员考试-船舶辅机(三管轮)(精选试题)
海船船员考试-船舶辅机（三管轮）1、“船员日常防火守则”适用于（）。
A.全体船员B.高级船员C.普通船员D.轮机部船员2、“作用数”的概念常用于（）。
①连杆式；②五星轮式；③内曲线式；④叶片式液压马达中的。
A.③B.④C.②③D.③④3、6000GT及以上的货船，当两台消防水泵同时工作开通过规定水枪由任何相邻消火栓输出要求水量时，在所有消火栓上应维持的压力不小于（）Mpa。
A.0.15B.0.27C.0.4D.0.84、8FS10活塞式压缩机发生液击时下列部件①假盖；②假盖导圈；③假盖弹簧；④吸气阀限位器；⑤排气阀内座芯；其中会动的是（）。
A.①③B.①C.①②③D.①③⑤5、8FS10制冷压缩机下层隔板最低处所开的通轴箱的孔道，作用不包括（）。
A.让吸气带回的滑油返回曲轴箱B.必要时抽空曲轴箱C.抽走偏“曲轴箱的冷剂D.减少吸气压力波动6、CO2灭火器适用于（）。
A.货舱、机舱、起居处所B.船上凡是有可燃物的处所C.货舱、机舱、货油泵舱、油漆间D.只适用于货舱、机舱7、CO2灭火系统在施放前应首先（）。
A.打开通往着火舱的控制阀B.打开通往分配阀的主阀门C.严密封舱D.发出警报，撤出人员8、CZ60/30型单缸级差式活塞式空压机低压和高压级安全阀（）。
A.都设在缸盖上B.前者在缸盖上，后者在排气管上C.分别在高压级吸、排阀D.前者在缸盖上，后者在高压级吸排阀室处9、CZ60/30型空压机（）。
A.一级排气压力为0.60MPaB.排气量为30m3/hC.二级排气压力为3.0MPaD.一级缸径为60mm10、D型锅炉的水冷壁连接（）。
A.汽包与水筒B.汽包与联箱C.汽包与热器D.A或B11、D型锅炉的下降水管连接（）。
A.汽包与水筒B.汽包与联箱C.联箱与水筒D.A＋B12、D型锅炉中，炉膛内烟气与后排沸水管主要换热方式为（）。
A.辐射B.对流C.导热D.辐射十对流13、O形密封圈应（）保存。
A.用铁丝穿栓悬挂B.用密封的塑料袋C.放在高温场所D.放在阳光直射场所14、R22制冷剂限制含水量的目的是（）。
甲类三管轮机英语考试真题
【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。
甲类三管轮轮机工程基础真题46期
中华人民共和国海事局2008年第6期海船船员适任统考试题（总第46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笔涂黑。
每题1分，共100分。
1．下列说法，是错误的。
A．力的三要素中的任何一个发生变化，都将改变力对物体的作用效果B．集中力可以看成作用在物体的某个点上或分布在某条线段上C．刚体是指任何情况。
，其体内任意两点间的距离都不会改变的物体D．对于某一物体的平衡状态，必须指明它是相对于哪一个物体而言的2．——一可以适用于变形体。
A.力平衡原理B．加减平衡力系原理C．力的可传递性原理D．力的作用与反作用定律3．一般情况下，中间铰链约束的约来反力可用来表示。
A．一对相互垂直的力B．一个力偶C．一对相互乘直的力和一个力偶D．一对相互垂直的力和两个力偶4。
是引起机械振动的内因之一。
A.安装精度不够B．负载分布不均C．构件的质量D．润滑不够理想5．——一是机械振动的利用。
A．液力偶合器B．振动打桩机C．弹性联轴器D．调频飞轮6．机械振动按振动位移的特征可分为纵向振动、横向振动和A.机振动B．扭转振动C．自激振动D．弯曲振动7 当载荷超过某一定范围时，在z除载荷后，变形只能部分恢复而残留下一部分变形不能消失，材料的这种性质称为A．弹性B．弹性变形C．塑性D．塑性变形8．以下轮机工程实例中，主要是材料强度不够导致的问题。
A.起重钢索被重物拉断B．车床主轴变形过人C．千斤顶螺杆冈压力过人而变弯D．空气压缩机的活塞杆厂作中，在载荷反复作用下折断9．关于外力和载荷，是止确的。
A.外力可以是力，但不可以是力偶B．外力包括载荷和约束反力C．载荷不包括分布载荷D．载荷只能是静载荷，不能是动载荷10．关于应力的说法，——是错误的。
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中华人民共和国海事局2004年第2期海船船员适任证书全国统考试题（总第34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。
1. 视图中，不可见轮廓线用______表示。
A.双点划线B.细实线C.点划线D.虚线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. 俯视图从尺寸来说，是反映物体的______；从方位来说，是反映物体各部分的______位置关系。
A.长和高/左右和上下B.长和宽/左右和前后C.高和宽/上下和前后D.高和长/上下和前后5. 俯、左视图远离主视图的一侧是物体的______面。
A.后B.前C.左D.右6. 在三投影面体系中，水平面______于侧立投影面、______于正投影面、______于水平投影面。
A.平行/平行/垂直B.垂直/平行/平行C.倾斜/垂直/倾斜D.垂直/垂直/平行7. 组成物体形状的基本要素是______。
A.线和平面B.线和面C.直线和曲线D.平面和曲面8. 根据下图所示主视图和俯视图，选择正确的左视图。
A.如图B.如图C.如图D.如图9. 指出下图中正确的一组三视图。
A.如图B.如图C.如图D.如图10. 回转体的曲面都是由一条动线围绕某一轴线回转而形成的，这条动线称为：A.截交线B.轴线C.素线D.母线11. 根据下图所示主视图和俯视图，选择正确的左视图。
A.如图 B.如图C.如图D.如图12. 在正投影法中，当空间的平面垂直于投影面时，则其在投影面上的投影将______。
A.为缩小的类似形B.为放大的类似形C.积聚成一条线D.反映实形13. 在视图中，当两形体表面不平齐时，两形体的分界处______；当两形体表面平齐时，两形体之间______。
A.必有分界线／可以没有分界线B.可以没有分界线／必有分界线C.必有分界线／不该有分界线D.不该有分界线／必有分界线14. 基本体的画图与看图的基本方法是_____法；组合体的画图与看图的基本方法是____法。
A.形体分析／面、线分析B.面、线分析／形体分析C.形体分析／形体分析D.面、线分析／面、线分析15. 视图中的任一条粗实线或虚线，可能是_______。
A.物体上的一个面的反映实形的投影B.两形体表面相切处的分界线C.两平齐的形体表面间的分界线D.两面交线的投影16. 若一物体的俯视图为两个同心圆，则该物体的可能的形状为______。
A.唯一的一种B.两种C.三种D.许多种17. 下面说法中错误的是：A.机件的真实大小应以图样上所注的尺寸数值为依据B.机件的真实大小与图形的大小无关C.机件的真实大小与绘图的准确度无关D.机件的真实大小应按照图样上所注的尺寸数值和图样的比例经换算确定18. 直径尺寸应尽量注在______视图上，而半径尺寸必须注在______视图上。
A.主/俯B.非圆/圆形C.圆形/非圆D.圆形/圆形19. 组合体的总体尺寸是指______。
A.总长B.总宽C.总高D. A+B+C20. 局部视图是______。
A.物体向不平行于任何基本投影面的平面投影所得的视图B.将物体的某一部分向基本投影面投影所得的视图C.物体向基本投影面投影所得的视图D.假想将物体的倾斜部分绕其自身的回转轴线旋转到与某一选定的基本投影面平行后再向该投影面投影所得的视图21. 国标规定，常用剖视图为______剖视图。
A.全B.半C.局部D. A＋B＋C22. 移出剖面轮廓线用______绘出。
A.粗实线B.细实线C.点划线D.双点划线23. 国家标准的专用代号是_______。
A. CBB. YBC. JBD. GB24. 与粗牙普通螺纹相比，细牙普通螺纹的螺旋升角______，连接的可靠性______。
A.小／高B.小／低C.大／高D.大／低25. 画螺纹连接的剖视图时，应注意将内螺纹与外螺纹的______分别对齐。
A.顶径与顶径，底径与底径B.顶径与底径，底径与顶径C.大径与小径，小径与大径D.顶径与大径，底径与小径26. 螺纹标记中的旋合长度代号，对于普通螺纹来说分______组；一般情况下，按______旋合长度考虑，不加标注。
A.三／中等B.三／短C.三／长D.二／中等27. 在装配图中，允许将螺钉头部的起子槽简化画成______方向的______。
A.45°/加粗的粗实线B.45°/粗实线C.60°/加粗的粗实线D.60°/粗实线28. 常见的销中不包括______。
A.圆柱销B.开口销C.六棱销D.圆锥销29. 规定齿轮的分度圆用______绘制。
A.双点划线B.粗实线C.点划线D.细实线30. 簧丝直径在图形上为______毫米时，其剖面可涂黑表示，或采用示意画法。
A. 2B. 1C. 3D. A＋B31. 零件图的技术要求中，不包含______。
A.表面粗糙度B.零件的材料C.尺寸公差D.形状和位置公差32. 一零件长200mm，若按1：2绘图时，图样长度应画______mm，而标注尺寸应是______。
A. 100/ 100B. 200/ 100C. 200/ 200D. 100/ 20033. 直径为250mm的气缸套，其最大极限尺寸Lmax＝250.122mm，最小极限尺寸Lmin＝250.050mm，实测尺寸L＝250.100mm，则其实际偏差为______。
A. 0.022mmB.－0.050mmC.＋0.100mmD. 0.072mm34. 粗糙度代号的尖端必须从材料_____指向表面，代号中的数字必须与_____的方向一致。
A.外/ 尺寸数字B.内/ 角度数字C.外/ 水平线D.内/ 水平线35. 在装配图中，规定按不剖绘制的是______。
A.垂直其轴线剖切的轴B.垂直其轴线剖切的销C.横向剖切的键D.通过其对称平面剖切的吊钩36. 以下哪个尺寸不应注在装配图上?A.性能、规格尺寸B.外形尺寸C.具体结构尺寸D.装配尺寸37. 关于电阻温度计，下列说法中正确的是：A.测温元件为半导体的温度计具有正的电阻温度系数B.其温度计量范围较宽C.通常其测量的温度高于热电偶温度计D.测温元件只能用金属材料38. 下列热电偶代号中，使用温度较低的是：A. T型B. R型C. S型D. B型39. 下列温度计中，属于膨胀式温度计的是：A.光电高温计B.红外高温计C.电阻温度计D.酒精温度计40.弹簧管式压力表在测量稳压时，实测范围为压力表的:A.全量程B. 1/2全量程C. 2/3全量程D. 1/3全量程41. 离心式转速表的转速表系数为1:2时，若指针示值为200r/min，则其表轴的实际转速为:A. 100r/minB. 200r/minC. 300r/minD. 400r/min42. 在某些浮子式流量计的浮子上开有斜槽，其作用是:A.防止浮子偏斜影响测量精度B.使液体产生压力降C.调整浮子的重量D.为了读数方便43. 在平衡状态，比重计浸没于液体的深度取决于液体的密度，密度越______，浸没越______。
A.大／深B.小／深C.小／浅D.以上均不正确44. 毛发式湿度计利用脱脂毛发吸湿后所产生的长度变化来牵动______，然后通过指针指示出空气的______，或进行自动记录及控制。
A.杠杆机构／相对湿度B.继电器触头／相对湿度C.感湿元件／相对湿度D.电位器手柄／绝对湿度45. 国际单位制中，热量的单位采用:A.卡(Cal)B.焦(J)C.英热单位(BTU)D.千瓦/时(Kw/h)46. １升等于:A.１立方米B.１立方分米C.１立方厘米D.１立方毫米47. 当铰链四杆机构的最短杆与最长杆长度之和小于或等于其余两杆长度之和，并以最短杆为机架时，该铰链四杆机构为______。
A.曲柄摇杆机构B.双曲柄机构C.双摇杆机构D.摇块机构48. 曲柄连杆机构中，曲柄匀速转动时，活塞从上止点向下运动，活塞运动的最大速度出现在______处。
A.曲柄转角为90°B.曲柄转角略小于90°C.曲柄转角略大于90°D.曲柄转角为180°49. 选择以下正确的表述：A.柴油机启动空气分配系统常采用凸轮机构B.回油阀式高压油泵常采用凸轮机构C.偏心轮机构常用于变向变量油泵D.凸轮与从动杆的接触为低副50. 按凸轮的形状，凸轮主要分为______凸轮、移动凸轮和______凸轮。
A.盘形/ 圆柱B.盘形/ 鸡心C.椭圆/ 圆柱D.椭圆/ 鸡心51. 凸轮机构的压力角是指______之间所夹的锐角。
A.从动件运动方向与其受力方向B.凸轮转动方向与其受力方向C.凸轮转动方向与从动件运动方向D.从动件受力方向与凸轮转动方向52. 选择以下正确的表述：A.在起重设备中，棘轮机构常用来阻止鼓轮反转B.槽轮机构常用于柴油机的气缸注油器中C.凸轮机构不能实现间歇运动。
D.摩擦轮传动也能用来阻止鼓轮反转53. 与齿轮传动相比，当传递的功率相同时，摩擦轮传动______。
A.轮廓尺寸较小B.轴上的载荷较小C.轴承上的载荷较大D.速度较低54. 关于圆柱槽摩擦轮传动，下面说法中不正确的是：A.两轮在整个接触长度上，只有节点处表面速度相等B.节点位置随着传递扭矩的大小而改变C.传动比不可能为常数D.几何滑动与磨损速度无关55. 若n为摩擦轮的转速，D为摩擦轮的直径（或平均直径），脚标1和2分别代表主动轮和从动轮，则传动比i＝ n1 /n2＝______。
A. D2 / D1B. D1/ D2C. D2D1D. D1+D256. 摩擦轮传动的功率损失中，不包括______损失。
A.滚动摩擦B.啮合摩擦C.弹性滑动D.轴承摩擦57. 下列带传动的优点中，不正确的是______。
A.传动的中心距较大B.能缓冲吸振C.轴上的载荷小D.价格便宜58. 弹性滑动发生在______上，此时带速与轮速相比是______。
A.从动轮/带速＞轮速B.主动轮/带速＞轮速C.从动轮/轮速＞带速D.主动轮/轮速=带速59. 若传动比i≠1，当中心距增大时，小带轮包角α1______。
A.增大B.减小C.不变D.增大，容易发生打滑60. 带传动与链传动相比较，平均传动比准确的是______，传递圆周力较大的是______。