海事局2005年第1期海船船员适任证书全国统考试题(总第36期)科目：船舶辅机 试卷代号：842(36842)
海事局海船船员适任证书全国统考试卷：36851
中华人民共和国海事局2005年第1期海船船员适任证书全国统考试题(总第36期)科目：船舶电气试卷代号：851适用对象：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：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. 不论电路如何复杂,总可归纳为由电源、____、中间环节三部分组成.A. 电阻B. 电容C. 电感D. 负载2. RC串联电路与100V直流电源相连其中R=10Ω,C=10μF,流过RC电路的电流最后稳定在：A. 5AB. 10AC. 0AD. 7.07A3. 用万用表的欧姆档检测电容好坏时，若表针稳定后，指在距“∞Ω”处远（但不指在“0Ω”处），则表明：A. 电容是好的B. 电容漏电C. 电容被击穿D. 电容内部引线已断4. 如图所示，a、b、c、d四点电位值中，最高点为：A. aB. bC. cD. d5. 如图直流电路，电压U保持不变。
当开关S由开到闭，电压表、如何变化？A. 前者不变，后者增大B. 前者增大，后者减小C. 前者减小，后者增大D. 前者增大，后者不变6. 若通过匝数为N的线圈电流为I,产生磁动势F的值为：A. INB. I/NC. I2ND. IN27. 通电导体切割磁力线将会产生感生电动势，确定磁场、导体运动和感生电动势方向关系应用：A. 右手螺旋定律B. 左手定则C. 右手定则D. 楞次定律8. 如图所示，利用伏安法测量线圈的内阻。
完毕后，若直接将电源开关打开，则：A. 由于自感，产生过电流可能损伤安培计B. 由于自感，产生过电压可能损伤伏特计C. 属于正常操作，无不良后果D. 由于自感，产生过电流可能损伤伏特计9. 在铁心线圈通电后，线圈内产生的磁感应强度与线圈电流（或磁势）的关系是：A. 成正比B. 成反比C. 无关D. 呈磁滞性、磁饱和性10. 具有下列特征的正弦交流电不符合“工频”范畴的是指：A. 周期为0.02sB. 有效值为220VC. 频率为50HzD. 角频率为314rad/s11. 已知U1=100sin(ωt+10°)V，U2=sin(2ωt+40°)V，则在相位上：A. u1滞后u2，角度为30°B. 因为幅度不同，故二者不能比较C. u1超前u2，角度为30°D. 因为频率不同，故二者不能比较12. 纯电容电路中，已知外加电压u = 220 sin（ωt+15°）V，则电路中的电流的初相位为：A. 15°B. 0°C. -75°D. 105°13. RL串联交流电路，若已知电阻的压降为U R，电感的压降为U L，则总电压为：A. U R +U LB. U R -U LC.D.14. 在RLC串联交流电路中，电感L和电容C都是：A. 消耗电能元件B. 储能元件本身不消耗电能C. 产生有功功率D. 以上全对15. 对称三相电源中，三相瞬时电动势的代数和：A. 总为0B. 3倍于单相电动势C. 倍于单相电动势D. 倍于单相电动势16. 三相对称负载接三相对称电源,下列说法错误的是：A. 三相电流相量和为零B. 中线上电流为零C. 三相电流有效值之和为零D. 三相电流瞬时值之和为零17. 采用同一电源三相对称负载作三角形连接时，消耗的功率是作星形连接时的______倍。
海事局2001年第1期海船船员适...
海事局2001年第1期海船船员适...第一篇：海事局2001年第1期海船船员适任证书全国统考试题(总第26期)科目：船舶辅机试卷代号：842(26842)中华人民共和国海事局2001年28．限定最大舵角的原因主要是。
A．避免舵机过载 B．避免工作油压太高C．避免舵机尺度太大D．转船力矩随着舵角变化存在最大值29．液压舵机双泵并联工作比单泵工作。
A．转舵扭矩约提高一倍 B．转舵速度约提高一倍 C．工作油压约提高一倍 D．A+B 30．液压舵机当舵叶受较大冲击负荷时不致损坏是由于。
A．主油路中充满有弹性的油 B．装置有足够的强度 C．装有弹性底座 D．主油路有安全阀 31．既定舵机的转舵速度主要取决于。
A．工作油压B．舵的负荷C．主泵流量D．舵机功率32．伺服液压缸式遥控系统中，油路锁闭阀的作用主要有。
A．减少换向阀漏泄对伺服液压缸的影响 B．隔断备用系统 C．防止两泵间的干扰 D．A与B与C 33．伺服液压缸式遥控系统中，液控旁通阀的作用主要有。
A．减少伺服液压缸漏泄 B．控制伺服液压缸运动速度 C．防止两套遥控系统间的干扰 D．备用泵的卸荷 34．液压舵机工作油箱中油位应经常保持在油位计显示范围。
A．1/3左右B．1/2左右C．2/3左右D．有油即可35．伺服油缸式舵机遥控系统控制油泵出口处设置单向阀是为了。
A．停泵时防止油倒流B．缩短泵自吸时间C．管路破裂时防止油漏失D．换向阀回中后保持油压使液控旁通阀保持隔断36．冷库内气体成分会显著影响食品保存时间的是库。
A．鱼B．肉C．蛋奶D．菜、果 37．用硅胶作干燥剂是利用其对水的作用。
A．化学反应B．拦截C．吸附D．乳化38．当压缩机状况和其他温度条件不变时，随着冷凝温度提高，制冷压缩机的轴功率。
A．增大 B．不变C．降低 D．在压力比为3左右出现最大值39．同一台制冷压缩机用于伙食冷库和用于空调制冷其制冷量。
A．相近B．前者较大C．后者较大D．不一定40．R134a不破坏臭氧层是因为它。
2001年第1期海船船员适任证书...
2001年第1期海船船员适任证书...第一篇：2001年第1期海船船员适任证书全国统考试题(总第26期)科目：船舶管理试卷代号：882中华人民共和国海事局2001年 28．下列哪一种为物理性爆炸？A．空油柜爆炸B．空气瓶爆炸C．扫气箱爆炸D．炉膛爆炸29．海上对象的应急优先权，依次为。
A.船舶——人命——海洋环境B.人命——船舶——海洋环境C.人命——海洋环境——船舶D.海洋环境——船舶——人命30．航行及操纵设备、应急设备等属于_____的检查项目之一。
A．安全检查 B．修船检验 C．边防检查 D．临时检验 31．对400总吨以上的客船至少应设消防泵：A．二台B．三台C．四台D．一台32．下列说法中，正确的是。
Ⅰ．船内不同的通讯装置，其声响信号具有不同的音色，以利辨别；Ⅱ．主机传令钟应具备复示装置；A．仅Ⅰ对B．仅Ⅱ对C．Ⅰ和Ⅱ都不对D．Ⅰ和Ⅱ都对33．STCW公约主要包括。
Ａ．正文B．附则C．STCW规则D．A+B+C 34．《STCW78/95公约》生效日期是。
A．1995年2月1日B．1996年2月1日 C．1997年2月1日D．1998年2月1日 35．《中华人民共和国劳动法》的实施日期是。
A．1994．1．1 B．1995．1．1 C．1996．1．1 D．1997．1．1 36．用以加强对船舶技术设备状况和人员配备及适任状况的监督检查。
A．船舶安全检查规则B．联合检查规则 C．海船船员值班规则D．开航技术标准 37．车钟记录簿上符号“√”是表示。
A．备车 B．停车 C．前进一 D．微速前进 38．轮机机炉舱场地的清洁保养工作主要应由_____具体负责。
A．轮机长 B．大管轮 C．二管轮 D．三管轮 39．船体水下体积形状的中心称为。
A．漂心 B．浮心 C．重心 D．稳心 40．纵骨架式结构适用于。
A．客船 B．干货船 C．油船 D．A和B 41．压载水系统用来各压载水舱的压载水。
A．注入 B．排出 C．调驳 D．A+B+C 42．首尾尖舱的舱壁是。
2003年第1期海船船员适任证书全国统考试题（总第30期）
2003年第1期海船船员适任证书全国统考试题（总第30期）中华人民共和国海事局2003年第1期海船船员适任证书全国统考试题（总第30期）科目：航海英语试卷代号：905适用对象：沿海航区船舶二/三副(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：请选择一个最合适的答案，并将该答案按答题卡要求，在相应位置上用2B铅笔涂黑。
第1题至80题，每题1分，第81题至84题，每题5分。
一．单项选择题．1. Ships are designed by ______．A. shipownersB. cargoownersC. naval architectsD. shipping agents2. Keep _____ to that point，said the pilot．A. straightB. directC. forwardD. on3. Merchant vessels can operate in three basic ways，but ______ is not one of them．A. linersB. voyage charterC. time charterD. general carrier4. liners are_____．A. trampsB. specialized vesselsC. passenger shipsD. specialized vessels，passenger ships or other carriers5. That ship is overtaking us．A. surpassingB. catchingC. leavingD. coming to6. The quartermaster is ______ the wheel．A. atB. inC. onD. for7. My ship is going astern．A. forwardB. inwardC. outwardD. backward8. The ship has a speed of more than 14 ______ at 120 _____．A. miles／r．m．pB. miles／r．p．mC. knots／r．p．mD. knots／r．m．p9. Are we going _____ a wharf？A. alongB. toC. alongsideD. against10._____ ready for mooring．A. DoB. HaveC. MakeD. Get11.Take tug's towing line to ________．A. captainB. capstanC. capitalD. carpenter12.Mooring lines both ______ were let go．A. for and aftB. from and aftC. all and afterD. fore and aft13.The expression drop anchor means ______．A. hold anchorB. leave anchorC. let go anchorD. weigh anchor14.ANCHOR IS ACROSS means that ______．A. Anchor is cross the bowB. Anchor is in the groundC. Anchor is foulD. Anchor is dragging15.The ship's bearing is 145° ______ the Lighthouse．A. inB. onC. forD. from16._____ is the chain？A. HowB. WhatC. WhyD. How about17.It is very kind _____ you to help us．A. ofB. forC. toD. at18. I'd like to apply ______ its extension．A. toB. withC. onD. for19.You ought to have known we never ______ lies．A. sayB. talkC. tellD. speak20.That ship arrived there ______ 6 p．m．yesterday．A. atB. inC. onD. of21.My ship is bound forShanghai，with dangerous cargo on board．A. withoutB. loadingC. dischargingD. carrying22.Is the pilot ladder all right at this _______？A. highB. highlyC. heighD. height23.I am proceeding ______ reduced speed．A. atB. withC. onD. within24.I have ______ with unknown vessel．A. collisionB. collidedC. collidingD. collide25.Fire is under control，and _______．A. lifeboat is no longer neededB. lifeboat is needed badlyC. lifeboat is needed not moreD. lifeboat is urgently needed26.The bearing of the mark or vessel concerned，is in the 360 degree notation from_______，except in the case of relative bearings．A. eastB. westC. southD. north27.DO NOT，REPEAT，NOT OVER-TAKE means that you should _______．A. overtakeB. not overtakeC. overtake or notD. decide if you should overtake28.Please have the damage to the gangway _______．A. repairB. to repairC. repairingD. repaired29.Please arrange the survey ______ early．A. to be carried outB. carry outC. be carried outD. will carry out30.Forecastle deck is located in the ship's _______．A. bow stemB. sternC. portsideD. starboard side31.PAN - PAN is to be used to announce _______．A. a distress messageB. an urgency messageC. a safety messageD. a massage of SMCP32.Our engine has a ______ of 2 000 horse-power．A. liabilityB. abilityC. capacityD. responsibility33.There are some navigational instruments ______ the bridge．A. inB. onC. atD. of34.Please get everything ready prior _______ shifting．A. onB. toC. atD. for35.The ship can leave the port _______ the joint inspection．A. beforeB. afterC. atD. from36.Roll-on／roll-off ships are equipped with _______．A. cargo elevatorsB. conveyor beltsC. rampsD. derricks and winches for cargo handling37.The bridge is fitted ______ two radars．A. beforeB. withC. fromD. on38.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 indicator39.At earliest indication of fire aboard your vessel, you first action is to______．A. locate the fireB. determine which type of fire is burningC. sound alarmD. fight the fire40.The portable radio apparatus means _______．A. the radio apparatus fitted on the portsideB. the radio with a portable equipmentC. the radio equipment which is easily movableD. the portable radio with some apparatus41.You must rig gangway combined ______ pilot ladder．A. inB. onC. atD. with42.I’m on fire and have dangerous cargo on board．The most emergent assistance in this case would be _______．A. life boatB. helicopterC. fire-fightingD. medicine43.We have no steel wire．You had better ______ us one．A. borrowB. lendC. takeD. let44.Our ship will not sail today．What about _______ ashore？A. goB. to goC. goingD. to going45.______ the time of collision，the 3rd officer was on the bridge．A. AtB. OnC. OfD. In46.Four years _______ my ship called at his port．A. agoB. fromC. afterD. before47.Tell me _______，please．A. which hatch will be loaded firstB. will which hatch be loaded firstC. will hatch of which be loaded firstD. first will which hatch be loaded48.What's wrong ______ the winch？A. forB. withC. toD. on49.It's going to rain．Don't forget _______ the hatches．A. closeB. closingC. to closeD. closed50.The damage was caused _______ the stevedores．A. withB. fromC. onD. by51.Discharging can be completed in no time．A. without timeB. very soonC. in any timeD. during day time52.We have finished _______ and are ready for sailing．A. loadB. loadingC. will loadD. to load53.______ the packing is the same，the lots are different in marks．A. ForB. SinceC. BecauseD. Although54.I expect _______ you at 1000hrs．A. to reachB. reachC. reachingD. to reaching55.You are going to _______．A. run agroundB. run groundedC. agroundD. run grounding56.The weather is often _______ in a high-pressure area．A. fineB. cloudyC. rainyD. windy57.The step of a pilot ladder which prevents the ladder from twisting is the _______．A. Proof barB. Shifting barC. Long barD. Spreader58.The side of a ship which is farther from the winds is _______．A. fairway sideB. open sea sideC. lee sideD. roadstead side59.At sea，we can use ______ to fix the ship's position．A. VHFB. Steering GearC. Rudder IndicatorD. DF60.______ is the course to reach you？A. WhatB. HowC. WhichD. When61.All echo-sounders can measure the _______．A. actual depth of waterB. actual depth of water below keelC. average depth from waterline to hard bottomD. average depth of water to soft bottom62.______ is prohibited in thisarea．A. AnchorB. AnchoringC. AnchoredD. Being anchored63.You are not complying ______ traffic regulations．A. toB. whoC. onD. with64.If the ship is alongside the wharf，what kind of ladder is used？A. pilot ladderB. rope ladderC. rod ladderD. accommodation ladder65.Heights are expressed _______ meters above Mean High Water．A. inB. onC. byD. with66.To agree with larger scale chart，latitudes taken from this chart should be increased _______ about 8 seconds．A. withB. inC. byD. to67.The pilot disembarked our ship yesterday．A. cameB. leftC. dischargedD. visited68.In a weather report GMT stands for _______．A. Greenwich Mean TimeB. General Mean TimeC. GovernmentD. General Management Treaty69.What is your ______ tropical storm warning information？A. latestB. latelyC. lastD. nowadays70.When winds of force reach 10-11 in Beaufort Scale，usually we call such winds as _______．A. HurricaneB. BreezeC. StormD. Gale71.A Doppler log in the bottom return mode indicates the _______．A. velocity of the currentB. bottom characteristicsC. depth of the waterD. speed over the ground72.A weather map is a synoptic data because it _______．A. summarizes a great deal of informationB. can be interpreted accuratelyC. appears dailyD. is prepared by the Weather Bureau73.Which procedure(s) shall be used to determine risk of collision?A. Watching the compass bearing of an approaching vesselB. Systematic observation of objects detected by radarC. Long-range radar scanningD. All of the above74.Dayshapes must be displayed _______．A. between sunset and sunriseB. only between 8 AM and 4 PMC. during daylight hours in any visibilityD. during daylight hours in unrestricted visibility only75.What does the word breadth mean in the Rules?A. Breadth on the uppermost continuous deckB. Molded breadthC. Greatest breadthD. Breadth at the load waterline76.While steaming slowly in the harbor，no ship is ______ to exceed the speed limited．A. assumedB. appreciatedC. promisedD. permitted77.Which vessel is a vessel restricted in her ability to maneuver under the Rules?A. A vessel is carrying out mine-clearingB. A vessel engaged in fishingC. A vessel at anchorD. A vessel not under command78.A vessel shall not _______．A. enter the traffic separation zone in an emergencyB. cross a traffic laneC. engage in fishing in the separation zoneD. proceed in an inappropriate traffic lane79.A power-driven vessel shall have her engine ready for ______ when the visibility is restricted．A. immediately stopB. immediately maneuveringC. immediately anchoringD. immediately going astern80.On a crane，the boom indicator tells the operator what angle the boom angle is compared to the_______．A. vertical positionB. horizontal positionC. boom stop angleD. minimum radius angle二．中译英（共4题，请将答案写在答题纸上）81．值班驾驶员在航行中应检查电罗经的工作情况。
36901考卷
中华人民共和国海事局2005年第1期海船船员适任证书全国统考试题（总第36期）科目：航海英语试卷代号：901适用对象：无限航区、近洋航区船舶船长(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：请选择一个最合适的答案，并将该答案按答题卡要求，在相应位置上用2B铅笔涂黑。
第1题至68题，每题1分，第69题至76题，每题1.5分，第77题至78题每题10分。
一．单项选择题1.Which statement concerning sweat damage in containers is TRUE?A. Sweat damage in containers is unusual due to the small-enclosed volume of airB. In general containerized hygroscopic cargoes are the only ones subject to sweat damageC. Containers should be ventilated dehumidified or the contents physically protected againstsweat damageD. Sweat damage is not a problem except in insulated and refrigerated containers2. This is to certify that at______in accordance with regulation 6 of IX of the Convention, the SafetyManagement System was found to comply with the requirements of the ISM Code.A. the time verificationB. the intervals of requirementsC. the periodical verificationD. the periodical approved3.One of the following is a part of recommended security analysis process:A. Selection of potential threat scenario and evaluation of consequencesB. Valuate/score the scenario in terms of potential consequencesC. Determine if scenario requires a mitigation strategy, select strategies and evaluate their impactD. All the above4. A vessel with tweendecks is very suitable for general cargo, as not only is the cargo space dividedinto separate tiers, but also the tweendeck prevents______from bearing on the cargo at the bottom of the hold.A. too much cargoB. too much weightC. too much spaceD. too much lots5. A swift current occurring in a narrow passage connecting two large bodies of water which isproduced by the continuously changing difference in height of tide at the two ends of the passage is called a(n) ______．A. hydraulic currentB. rectilinear currentC. rotary currentD. harmonic current6.Any stipulation in a contract of carriage of goods by sea or a bill of lading or other similardocuments evidencing such contract that______the provisions of the Chapter shall be null and void.A. conforms toB. is in compliance withC. derogates fromD. is confined to7. A snag or other underwater obstruction may form a ______.A. V-shaped ripple with the point of the V pointing upstreamB. V-shaped ripple with the point of the V pointing downstreamC. small patch of smooth water on a windy dayD. smoothing out of the vessel's wake8.As the propeller turns，voids are formed on the trailing and leading edges of the propeller bladescausing a loss of propulsive efficiency，______，and vibration. These voids are known as cavitation.A. deformation of the bladesB. crack of the bladesC. crispation of the bladesD. pitting of the blades9. What great circle is always needed to form the astronomical triangle？A. Celestial EquatorB. LongitudeC. Celestial MeridianD. Prime Vertical Circle10. The difference between local apparent time (LAT) and local mean time (LMT) is indicated by______．A. equation of timeB. difference of longitude between the local and central meridian in time unitsC. longitude in time unitsD. zone description11. One of the following is not potential threat scenario for vessels at sea.A. Boat loaded with explosives collides with the vesselB. Terrorist firing on the vessel with hand held missile launcherC. Terrorist boarding the vessel and taking control an colliding the vessel with another shipD. Non of the above12. A security level, for which appropriate additional protective security measures shall be maintainedfor a period of time as a result of heightened risk of a security incident is defined as ______.A. Security level 1B. Security level 2C. Security level 3D. Security level 413. A strategy is called highly effective strategy if it’s implementationA. Lower the mitigation categoryB. Will raise the mitigation categoryC. Will only lower the vulnerability scoreD. All of the aboverge quantities of uncovered pig iron or billets should not be carried in the upper-tween decksbecause ______.A. this does not eliminate the risk of cargo shiftingB. this will increase the metacentric height of the shipC. this will decrease the gravity height of the shipD. this will reduce the rolling period of the ship15. You notice that your speed has decreased，the stern of your vessel has settled into the water，and yourrudder is sluggish in responding. The MOST likely cause is ______.A. mechanical problems with the steering gearB. shallow waterC. loss of lubricating oil in the engineD. current16. Oily rags stored in a pile that is ______ are a hazard because they may ______.A. isolated from atmosphere / deteriorate and give off noxious gassesB. isolated from atmosphere / spontaneously heat and catch fireC. open to the atmosphere / deteriorate and give off noxious gassesD. open to the atmosphere / spontaneously heat and catch fire17. In stopping distances of vessels，head reach can best be described as the ______.A. difference between the vessel's speed through the water at any instant and the new speedordered on the telegraphB. distance the vessel has actually run through the water since a change of speed was orderedC. distance the vessel will run between taking action to stop her and being stationary in thewaterD. speed at which a vessel should proceed to ensure that she will run a predetermined distance，once her engines have been stopped18. MV SKYCLIPPER RE OUR TELCONV YDAY N PREVEIOUS TLX DD 24 JUL HV SPKN TOOWNER N UR RECFM TO Z FLWG NORDER ENSURE VSLS FXTRE TO U. Following this passage will be ______.A. the Notice of ReadinessB. the Declaration of DWTCC. the Fixture NoteD. the Notice of Demurrage19. If a container which has not been filled，packed，stuffed or loaded by the Carrier is delivered by theCarrier with the seal ______，such delivery shall be deemed as full and complete performance of the Carrier's obligation.A. intactB. properly usedC. perfectD. fully sized20. Which is a negotiated charter?A. FixtureB. Bill of LadingC. Conference agreementD. All of the above21. You are bound from port A governed by the summer load line mark to port B also governed by thesummer mark. The great circle track will take you into a zone governed by the winter mark. Which statement is TRUE?A. You cannot load beyond the summer mark at port A and must be at the winter mark uponarrival at port B.B. You must be at the winter mark when you enter the winter zone and cannot exceed thesummer mark upon departing port A.C. You can only load to the winter mark plus any fresh water allowance and burnout to sea atport A.D. You can load so that upon arrival at the pier at port B your freeboard is equal to the summermark less any fresh water allowance.22. Under normal weather and sea conditions when securing a stack of containers with non-lockingfittings lashings are required when the tier exceeds what height?A. Lashings are always requiredB. Five containersC. Four containersD. Three containers23. Effects which are dutiable or subject to prohibitions or restrictions should be declared in ______.A. CREW LISTB. PERSONAL EFFECTS LISTC. PASSENGER LISTD. GENERAL DECLARA TION24. Should it appear that war or blockade would prevent the vessel from safely reaching the port ofdestination and / or discharging the goods thereat，the Carrier ______.A. is not entitled to claim against the shipper or charterer any damage that he will suffer with thecargo on boardB. is not entitled to terminate the contract of carriageC. is entitled to discharge the goods at the port of loading or any other safe and convenient place andterminate the contract of carriageD. is entitled to claim freight with the cargo on board25. If the PSCO from general impressions or observations on board has ______for believing that theship, its equipment or its crew do not substantially meet the requirements, the PSCO should proceed to a more detailed inspection.A. clean reportB. serious deficienciesC. clear groundD. detention report26. Protective clothing must be worn while sampling hazardous cargo on a tank ship，and as a minimumincludes ______.A. a hood or hard hatB. a face mask or gogglesC. bootsD. chemical resistant gloves27. Bids will be taken and opened for ______ of contract at the offices of Messrs. Albright，JenkinsCompany，the ship's Agents，located in this city，on August 19，1989，at 9: 00 A. M.A. awardingB. givingC. grantingD. providing28. Repairing damage to the hull at or above the waterline reduces the threat of ______.A. free surface effectsB. capsizingC. continued progressive floodingD. wind heel29. Please accept this as notice that MV Blue Ocean is now berthed at your dock and is in all respectsready to load her cargo as per terms of the charter-party dated at New York on June 10，1999．This sentence is likely to appear in ______.A. Declaration of Deadweight Tonnage of CargoB. Notice of DemurrageC. Notice of DespatchD. Notice of Readiness30. You are up bound approaching a lock and dam and see two green lights in a vertical line. Thisindicates ______.A. the downstream end of an intermediate wallB. that a double lockage is in progressC. the downstream end of the land wallD. the navigable pass of a fixed weir dam31. Under a voyage charter, the rate of demurrage that would incur after the expiration of the laytimeand the rate of dispatch money to be paid as a result of the completion of loading ordischarge , shall be fixed by the shipowner and charterer upon mutual agreement.A. ahead of scheduleB. behind scheduleC. after the expiration of the demurrageD. before the expiration of the demurrage32. Over a long period, several mixed forms have evolved resembling voyage charter or time charter, butwith a number of specific features. This type of contract is often a mixed(hybrid) contract which is referred to as a ______.A. voyage charter partyB. time charter partyC. carriage of affreightmentD. contract of affreightment33. When having only a parcel or a limited quantity of cargo he may directly or indirectly, througha______, send his goods as general cargo with a liner operator.A. post officeB. brokerC. ship masterD. forwarding agent34. You see an iceberg that has not been reported. What kind of radio message do you transmit to warnothers?A. Safety messageB. Urgency messageC. Distress messageD. Routine message35. A vessel is tender if cargo weight is ______.A. concentrated high and the double bottoms emptyB. concentrated low and the double bottoms emptyC. evenly distributed vertically with the double bottoms fullD. concentrated and with the double bottoms full36. Which of the following parts of ISPS code are mandatory?A. Part B 8.1 to 13.6B. Part B 8.2 to 13.8C. Part A and part B 8.1 to 13.6D. Part A and part B 8.2 to 13.837. Which of the following statement is correct regarding ship handling when in the vicinity of trafficseparation schemes？(1)A vessel shall，so far as practicable，avoid crossing traffic lanes (2)If obliged to cross traffic lanes，she shall do so as nearly as practicable at right angles to the general direction of traffic flow．A. (1) onlyB. (2) onlyC. Both(1) and (2)D. Neither (1) nor (2)38. Record of shipboard keys to be maintained for the following:A. Custody of all keysB. List of spare keys with ship security officerC. List of lost keysD. All the above39. Progressive flooding may be indicated by ______.A. ballast control alarmsB. excessive draftC. excessive list or trimD. a continual worsening of list or trim40. Prior to magnetic particle inspection of anchor chain，the chain should be ______.A. degaussedB. demagnetizedC. soakedD. sandblasted41. A compound fracture is a fracture in which ______.A. more than one bone is brokenB. the same bone is broken in more than one placeC. there is never any internal bleedingD. the bone may be visible42. Several merchant ships are arriving at the scene of a distress incident. One of them must assume theduties of the Coordinator Surface Search (CSS). Which of the following statements is TRUE?______.A. CSS duties are always assumed by passenger vessels，dry cargo vessels，or tankers in thatorder of precedenceB. The CSS must be established by mutual agreement between the ships concernedC. A tank vessel should never be assigned CSS duties unless only tank vessels are presentD. The first vessel to arrive at the distress incident is designated as the CSS43. Sue and Labor is to ______ a loss which would be recoverable under PICC Hull Insurance Clauses．A. avert or minimizeB. increase or maximizeC. claimD. indemnify44. Following a collision or accident，the Master of each vessel involved must render assistance topersons affected by the collision or accident ______.A. if he can do so without any risk to his vesselB. if he can do so without undue delayC. if he can do so without serious danger to his vessel or to individuals on boardD. without regard to any danger to his vessel45. You are proceeding to a distress site and expect large numbers of people in the water. Whichstatement is TRUE?A. You should stop to windward of the survivors in the water and only use the ship's boats torecover the survivorsB. If the survivors are in inflatable rafts you should approach from windward to create a lee forthe survivorsC. An inflatable life raft secured alongside can be an effective boarding station for transfer ofsurvivors from the boatsD. Survivors in the water should never be permitted alongside due to the possibility of injuryfrom the vessel46. In a Salvage Contract the word Salvor means ______．A. The Captain of the rescued vesselB. The salving vessel or the likeC. The rescued vesselD. The salvage operations47. Your vessel has run aground and is touching bottom for the first one-quarter of its length. What is theLEAST desirable method from the standpoint of stability to decrease the bottom pressure?A. Discharge forward deck cargoB. Pump out the forepeak tankC. Shift deck cargo aftD. Flood an after double-bottom tank48. Every act of assistance or salvage，which has had a useful result，should give a right to ______remuneration．A. obtainableB. equitableC. profitableD. approvable49. Under Lloyd's standard form of salvage agreement, the owners of the vessel their Servants andAgents shall use their best endeavours to ensure that the cargo owners provide their proportion of security ______.A. before the cargo is received.B. before the cargo is released.C. after the cargo is received.D. after the cargo is released.50. The continuing boom in the transportation of oil and the increasing scale of oil pollution incidentsresulted in serious international concern for the marine environment, not only as a result ofaccidents but also through______, such as the cleaning of cargo tanks.A. routine tanker pollutionB. routine tanker operationsC. routine oil disposalD. routine oil transit51. A vessel has been damaged by fire. The survey shows the cost of repairs will exceed the value of therepaired vessel. This is an example of a(n) ______.A. constructive total lossB. salvage lossC. actual lossD. preferred loss52. The ship owner's liability for cargo damage is covered under what marine insurance policy？A. HullB. CargoC. Protection and IndemnityD. Pollution53. When securing a hook to the end of a wire rope you should use ______.A. a bowline knotB. a long spliceC. an overhand knot with a wire rope clipD. wire rope clips with a thimble eye54. The Insurance Company shall be liable for ______．A. loss or damage caused by unseaworthiness of the insured shipB. demurrage of the insured ship and other indirect expensesC. reasonable expenses for ascertaining the loss or damage within the scope of CoverD. A，B，C are all wrong55. An underwriter is liable for ______.A. loss arising from the subject itself because of its inherent qualitiesB. loss caused by the ordinary evaporation of liquidsC. loss caused by heavy weatherD. the natural decay of the vessel due to the passage of time56. Damage to another vessel's cargo，caused by a collision，is covered under which marine insurancepolicy？A. HullB. FireC. Protection and IndemnityD. None of the above57. The original Bill of Lading once signed by the Master is NOT ______.A. a receipt and proof that goods have been received on boardB. surrendered to the customs agency of the country where the cargo is dischargedC. used to transfer ownership of the cargo while the ship is enrouteD. a proof of title or ownership of the cargo58. The Shipping Company shall be responsible for all sick pay and medical expenses for injuries orsickness of crewmembers arising out of or in the course of their employment as well as travelling expenses for medical treatment, including those which may not be covered by the terms andconditions of ______.A. the P & I insuranceB. the Hull insuranceC. the Marine Cargo insuranceD. the Hull War and Strike insurance59. You have a large, broken-down vessel in tow with a wire rope and anchor cable towline. Both vesselhave made provision for slipping the tow in an emergency; however, unless there are special circumstances______.A. the towing vessel should slip firstB. the vessel towed should slip firstC. they should slip simultaneouslyD. either vessel may slip first60. ______ is not a process of weathering of the oil spilled in the sea water.A. EmulsificationB. Sedimentation / SinkingC. Oxidation including photooxidationD. Burning organized by RCC61. According to the Maritime Code of China, where the holder of the bill of lading is not the chartererin the case of a bill of lading issued under a voyage charter, the rights and obligations of the carrier and the holder of the bill of lading shall be governed by the clauses of ______.A. the bill of ladingB. the voyage charterC. the agreement between the carrier and the holder of the B/LD. the Maritime Code of the People’s Republic of China62. If the Shipowner has agreed to receive deck cargo，______ must contribute to the loss，provided theowner of the jettisoned goods is the sole cargo owner．A. the shipB. the ship and the freightC. the freightD. neither the ship nor the freight63. If there is a strike or lock-out affecting the cargo on or after vessel's arrival at port of discharge andthe same has not been settled within 48 hours，Receivers shall have the option of keeping vessel waiting until such strike or lock-out is at an end against paying half demurrage after expiration of the time prescribed for discharging or ordering the vessel to a substituting port．The “same” refers to ______.A. the cargoB. the portC. the arrivalD. the strike or lock-out64. The charterer has completed loading the vessel in 3 days instead of the 5 days agreed to in thecharter party. As a result of this , the ______．A. shipowner may charge for two lay daysB. charterer may receive dispatch moneyC. stevedore may collect demurrageD. charterer may pay demurrage to shipowner65. Biodegradation of the oil slick in sea water is assisted by all the following marine micro-organismswhich are capable of metabolising oil compounds except ______.A. bacteriaB. mouldsC. yeastsD. seals66. If P=Probability, C=Consequences, R=Risk; which one of the following equation is correct?A. P=C + RB. R=C x PC. R=C/PD. Non of the above 67. An oil tanker operating with dedicated clean ballast tanks shall be equipped with ______，approvedby the Administration on the basis of specification recommended by the Organization，to enable supervision of the oil content in ballast water being discharged.A. an oil content meterB. an oil checkerC. an analyzer of oil contentD. a mixer of oily water68. With respect to the ballasting of cargo tanks, sufficient cargo tanks shall be crude oil washed prior toeach ballast voyage in order that ballast water is put only into cargo tanks _______.A. with inert gas systemB. without inert gas systemC. which are to be crude oil washedD. which have been crude oil washed二．关联题（每组关联题题干下有4个小题，每小题4个选项）第一组：As with the duties of loading and stowing of the carrier under Hague Rules and national statutes incorporating one or other of those Rules，there is a difference of opinion as to whether the carrier may validly delegate its responsibility for discharging the cargo to another party，notably to the consignee. Despite some lower court expressions to the contrary，the more prevalent view is that loading，stowing and discharging are "non-delegable" obligations of the carrier of goods by sea. In consequence，while it may be permissible to transfer the responsibility for paying for loading，stowing and discharging to the shipper or consignee (e.g. by inserting an "FIOST" clause in the bill of lading)，this or any other clauses which purport to also transfer the liability for fault or negligence in the conduct of these operations from the carrier to cargo are null and void，because they relieve or lessen the carrier's obligations otherwise than as permitted by the Act. This position is well-founded，given the fundamental purpose of the Rules and the national statutes of protecting shippers and consignees against the superior bargaining power of carriers. While acceptable in charterparties，which are contracts of private carriage，such clauses are rightly set aside by courts in carriage under bills of lading.69. According to this passage，"FIOST" clause in the bill of lading is ______.A. not accepted by courtsB. acceptable in courtsC. a non-delegable clause in the bill of ladingD. incorporated in the bill of lading to avoid superior bargaining by the carrier against thereceiver70. The prevalent view is that ______.A. the carrier may validly delegate its responsibility for discharging the cargo to another partyB. whether the carrier may validly delegate its responsibility for discharging the cargo to anotherparty is still in disputeC. it is not necessary to consider whether the carrier may validly delegate its responsibility fordischarging the cargo to another partyD. the carrier may not validly delegate its responsibility for discharging the cargo to another party71. In the eyes of law，an "FIOST" clause in the bill of lading ______.A. does not transfer the responsibility for paying for loading，stowing and discharging to theshipper or consigneeB. has nothing to do with the responsibility of the carrierC. relieves or lessens the carrier's obligations otherwise than as permitted by the ActD. imposes more obligations to the carrier than as permitted by the Act72. It can be inferred that the author______the opinion that the carrier may validly delegate itsresponsibility for discharging the cargo to another party.A. supportsB. does not supportC. has not indicated whether he supports or notD. has no interest in discussing第二组：When SEA EMPRESS was two or three cables from the Channel entrance，the pilot saw from the changing aspect of the Outer Leading Lights that there was a set to the east. He ordered a course change of 5° to port. The vessel，which was now closing with the Mid Channel Rocks Light Buoy，started to turn to port. The pilot saw the Outer Leading Lights close and then open to the east as the bows entered the channel. The Buoy was very close to starboard and the pilot now saw that the fixed red and fixed white lights of the Outer Leading Lights，the ones indicating the east side of the deepest water in the Channel entrance，were also open to the east.After the bows had passed the Middle Channel Rocks Light to starboard there was a shuddering vibration，then a sound from the deck below of liquid being forced under pressure，accompanied by a strong smell of oil. The helmsman reported that the vessel was not steering and the pilot ordered 'full astern'. The Chief Officer recorded this order and the vessel's position，which was 1.4 cables northwest of Middle Channel Rocks Light. SEA EMPRESS，which was trimming by the head and taking a starboard list，continued to run ahead as the main engine was on full astern. There were further main engine movements and the vessel finally lost all way after she grounded again in a position about 3.3 cables south-by-west of the Mill Bay Buoy. The main engine was put to 'stop'. SEA EMPRESS was by this time significantly trimmed by the head and had taken an 18° list to starboard with the starboard fore part of the deck awash and was heading in a northwesterly direction.73. The course of SEA EMPRESS，when entering the Channel entrance，was most likely in a directionof ______.A. NorthB. EastC. SouthD. West74.“The pilot saw the Outer Leading Lights close and then open to the east as the bows entered thechannel”. This indicates that ______.A. the front Leading Light appeared to move to the left of the rear Leading LightB. the rear Leading Light appeared to move to the right of the front Leading LightC. the rear Leading Light appeared to move to the east of the front Leading LightD. the front Leading Light appeared to move to the east of the rear Leading Light75. When SEA EMPRESS was grounded the second time，her smallest freeboard was on her ______.A. port side before mid sectionB. port side after mid sectionC. starboard side before mid sectionD. starboard side after mid section76. A conclusion can be drawn from this passage that SEA EMPRESS was grounded at about ______hours (LT).A. 0200B. 0900C. 1900D. 2200 三．中译英（共2题，请将答案写在答题纸上）77.就你方要求一油轮外档傍靠并跨过我轮卸货，及租船人同意你轮傍靠一事声明如下：根据租船合同傍靠条款，只有当装卸我船货物时才可傍靠，并且当船长认为此傍靠和装卸货作业不安全时，有权拒绝。
航海学真题36期
中华人民共和国海事局2005年第1期海船船员适任证书全国统考试题（总第36期）科目：航海学试卷代号：913适用对象：无限航区3000总吨及以上船舶二/三副(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. 地理纬度是某地子午线的______与赤道面的交角。
A. 半径B. 切线C. 法线D. 铅垂线2. 已知起航点纬度ϕ1＝2510＇.2N，到达点纬度ϕ2＝1308＇.3N，则两地间纬差Dϕ为：A. 1201＇.9SB. 1201＇.9NC. 1212＇.9SD. 3818＇.5N3. 经差、纬差的方向是根据______来确定的。
A. 起航点相对于到达点的方向B. 到达点相对于起航点的方向C. 起航点的地理坐标的名称D. 到达点的地理坐标的名称4. 地球上某点ϕ＝40N，λ=120E，则它与地轴的对称点是：A. ϕ＝40N，λ＝120WB. ϕ＝40S，λ＝120EC. ϕ＝40N，λ＝060WD. ϕ＝40S，λ＝060W5. 罗经点方向W/N换算成圆周方向为：A. 348.75B. 303.75C. 281.25D. 326.256. 航海上是在______上确定方向的。
A. 测者真地平平面B. 测者地面真地平平面C. 测者子午圈平面D. 测者卯酉圈平面7. 真航向是：A. 船舶航行的方向B. 船首尾线的方向C. 船首向D. 船舶航行时真北至船首尾线的夹角8. 航海学中，使用地球圆球体为地球数学模型的场合是：①描述地球形状时②定义地理坐标时③制作墨卡托投影海图时④计算大圆航线时⑤制作简易墨卡托图网时A．①② B．②③ C．③④ D．④⑤9. 某轮陀罗航向315，陀罗差2W，测得某物标舷角030时，该物标真方位为：A. 343B. 345C. 347D. 28310. 当船舶转向时，下列哪些随之发生改变？①磁差②自差③年差④罗经差⑤真方位⑥罗方位A.①②③B.④⑤⑥C.①③⑤D.②④⑥11. 某地磁差资料为：磁差偏东030＇（1989），年差＋2＇.0，则该地1999年的磁差为：A. 050＇EB. 010＇EC. 010＇WD. 032＇E12. 将1n mile规定为1852m后，在航海实践中所产生的误差：A. 在赤道附近最小B. 在两极附近最小C. 在纬度45附近最小D. 在纬度45附近最大13. 地球椭圆体上不同纬度1＇弧长不相等，在纬度45处1n mile等于：A. 1842.9mB. 1852.3mC. 1852.0mD. 1861.6m14. 在大洋航行，使用了具有资料的海图，试问，从何处可找得这些数据的测量年份。
海事局海船船员适任证书全国统考试卷：36872 轮机维护与修理
中华人民共和国海事局2005年第1期海船船员适任证书全国统考试题(总第36期)科目：轮机维护与修理试卷代号：872适用对象：750―3000KW船舶轮机长/大管轮（本试卷卷面总分100分，及格分为70分，考试时间为100分钟）答题说明：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.某些不重要的设备缺乏适用的检测手段、临界参数或不具备实施检测的条件，所以只能采用:A. 事后维修B. 视情维修C. 定期维修D. 定时维修2.船机零部件中的轴承具有哪一类故障规律？3.轮机部的预防性维修计划由_________制定。
A. 轮机长B. 大管轮C. 二/三管轮D. 主管轮机员4.根据船舶维修保养体系，维修周期为12000K的维修工作类别为：A．常规检查 B．主要部件维修C．解体拆修检查 D．特检、循检要求的维修5.船龄_______的船舶，修理后应达到保持原设计性能。
A. ＜5年B. ＜10年C. ＜12年D. ＜15年6.RCM对潜在故障和危害安全的故障，不能采用的维修方式是：A. 状态维修B. 计划维修C. 事后维修D. 预防维修7.中国船级社对营运船舶保持船级进行的替代检验是：PMS的检验 C. 坞内检验 D. 特别检验故障率曲线如图所示的设备一般应采用哪一种维修方式？A. 事后维修方式B. 定时维修方式C. 视情维修方式D. 不定期维修9.船厂对修理质量保证的时间是:A. 固定件3个月，运动件3个月B. 固定件6个月，运动件3个月C. 固定件6个月，运动件6个月D. 固定件3个月，运动件6个月10.船厂完成修船工程后，应交付船方验收，船级检验项目应由验船师检验，单项修理工程完工或试验后应由_______检查认可。
A. 验船师B. 船长C. 轮机长D. 大管轮11.属于“小修”类别的修理单，轮机长应在船舶进厂前______送交公司船技处。
海事局海船船员适任证书全国统考试卷：36881 船舶管理
中华人民共和国海事局2005年第1期海船船员适任证书全国统考试题(总第36期)科目:船舶管理试卷代号:881适用对象:750KW及以上船舶轮机长/大管轮（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.被授予船型附加标志船有______，并在船级符号后面应加注加强检验附加标志______。
A.油船、散装货船、矿沙船，ESPB.油船、散装货船、矿沙船，EPSC.液化气船、油船、散装货船、矿沙船，EPSD.液化气船、油船、散装货船、矿沙船，ESP2.外板的短边接缝叫:A.边接缝B.纵向接缝C.端接缝D.竖向接缝3.下列属于首部结构特点的是：①多采用纵骨架式②肋骨间距小③构件尺寸大④设有许多空间骨架A.①②③B.②③④C.①～④D.①②④4.引起船体发生总纵弯曲的原因，主要是沿着船长方向每一点上:A.重力分布不平衡造成的B.浮力分布不平衡造成的C.压力分布不平衡造成的D.重力和浮力不平衡造成的5.远洋船舶载重线标志上的最高一条载重线是：A.热带载重线B.夏季载重线C.热带淡水载重线D.冬季载重线6.船舶的重心的纵坐标随吃水的增加而：A.增大B.减小C.不变D.不确定7.船装卸少量重物之后吃水的平行改变量与TPC：A.成正比B.成反比C.无关D. A，B，C均可8.悬挂物对稳性的影响相当于将货物重心:A.下移到龙骨处B.上移到上甲板C.上移到悬挂点处D.悬挂物对稳性的影响需视悬索长度而定9.提高船舶静稳性的方法有：Ⅰ、提高重心Ⅱ、降低重心Ⅲ、减少自由液面Ⅳ、固定悬挂物，防止摇摆Ⅴ、调整重物的水平位置Ⅵ、垂直向上移动重物A.Ⅰ+Ⅱ+Ⅲ+ⅣB.Ⅱ+Ⅲ+ ⅣC.Ⅰ+Ⅲ+Ⅳ+ⅤD.Ⅱ+Ⅲ+Ⅴ+Ⅵ10.船舶从出发港至目的港的整个过程中，初稳性高度会有几个:A.一个B.二个C.三个D.许多个11.初稳性是指：A.船舶在未装货前的稳性B.船舶在小角度倾斜的稳性C.船舶在开始倾斜时的稳性D.船舶在平衡状态时的稳性12.静稳性曲线图上，曲线斜率为零的点所对应的船舶横倾角为:A.稳性消失角B.甲板浸水角C.极限静倾角D.船舶进水角13.船舶运送重大件货物时应特别注意:A.稳性和吃水差B.稳性和纵向强度C.稳性和局部强度D.局部强度和吃水差14.船体破损进水后，首先应:A.关闭所有水密装置和通路、防止进水漫延B.测量各舱室污水沟水位变化，查明漏洞所在C.组织排水堵漏D.发放求救信号15.船舶在____破舱进水时，其危险性最大。
海事局海船船员适任证书全国统考试卷：36805
中华人民共和国海事局2005年第1期海船船员适任证书全国统考试题(总第36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 pump has a constant stroke and the amount of fuel delivered is regulated by rotating ______which has a specially arranged helical groove cut into it.A. the pump cylinderB. the pump camC. the pump plungerD. the pump roller2.Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?A. Exhaust and scavenging.B. Scavenging and compression.C. Ignition and expansion.D. Exhaust and compression.3.Precision engine bearing inserts are manufactured with a small portion of the bearing endsextending beyond the bearing housing or caps. The installation process of these bearings requires sufficient ______.A. overlapB. crushC. lap or leadD. protrusion4.The ability of a fuel particle to travel into the combustion chamber before burning is called _____.A. penetrationB. permanenceC. turbulenceD. atomization5.As for turbine oil, contacting with water in the form of steam will be inevitable so good ______properties will be essential.A. defrostingB. de-oilingC. demulsifyingD. dehumidifying6.An additive used to improve the ability of a lube oil to reduce friction is known as a/an ______.A. suppressant additiveB. dispersant additiveC. extreme pressure additiveD. viscosity improver additive7.Any carbon built up on surfaces must be washed away by ______ additives and held in suspensionby a ______additive.A. dispersant /detergentB. detergent/dispersantC. dispersant /dispersantD. detergent/detergent8.Vee-type engines have the connecting rods from two cylinders connected to each ______of thecrankshaft.A. throwB. webC. main bearingD. deflection9. A supercharged engine differs from an un-supercharged engine ______it operates at an increasedpressure.A. in whichB. on whichC. at whichD. in that10.The ___ engine is used for alternators and sometimes for main propulsion with a gearbox toprovide a propeller of between 90 to 120 rpm..A. four-strokeB. two-strokeC. slow speedD. reversible11.The most common contaminate of governor hydraulic fluid is ______.A. moistureB. dirtC. acidD. air 12.A governor automatically controls engine speed by regulating the ______.A. fuel supplyB. firing orderC. engine loadD. oil level13.A vane pump belongs to ______according to its working principle.A. reciprocating pumpB. positive displacement pumpC. centrifugal pumpD. centripetal pump14.The ______pump is usually used as the lubricating oil pump.A. turbineB. screwC. vaneejectorD. centrifugal15.If you were operating a centrifugal water service pump with worn wearing rings, the ______.A. pump would be very noisyB. pump would vibrate excessivelyC. pump would develop insufficient flowD. stuffing box would leak excessively16.A ______in the air delivery line near to each compressor is essential.A. butterfly valveB. globe valveC. gate valveD. non-return valve17.______the moveable plate and floating ring inside the pump is very difficult.A. Having adjustedB. Being adjustedC. To adjustD. Adjusted18.In its simplest form the pressure reducing valve is opened or closed by ______which is balancedby the downstream pressure acting on a diaphragm.A. adjusting a nutB. a pre-tensioned springC. any springD. upstream pressure19.Before an auxiliary boiler is shutdown for an extended period of time, the water in the boilershould have a pH value of ______.A. 10B. 7C. 4D. 120.The exhaust boilers are used to recover some of ______carried in the exhaust gas from the mainengine.A. waterB. oilC. heatD. steam21.Fins are installed on the generating tube surfaces in waste heat boilers to ______.A. prevent soot fires in the exhaust systemB. prevent exhaust gas erosion of the tubesC. increase the velocity of exhaust gas flowD. increase the rate of heat transfer22.The ______is not a component of an oil separator.A. sliding bowl bottomB. gravity discC. separating discD. scum valve23.The ______of the gravity disc is too big. It cause oil to flow through the water outlet. We changedthe disc and no oil is found in the water outlet.A. gravityB. diameterC. bowlD. cylinder24.The ______is fitted on an oily water separator.A. sliding bowl bottomB. gravity discC. bowlD. liquid level detector25.The oil sludge is burnt in the ______onboard. I’ll show you the ashes.A. boilerB. main engineC. auxiliary engineD. incinerator26.Which of the listed burning materials would be described as a class ‘ B ’ fire?A. AcetyleneB. Lube oilC. GreaseD. All of the above27.______unit is mounted so as to raise and lower the cable from the spurling pipe, which is at thetop and center of the chain or cable locker.A. The cable lifterB. The hoisting motorC. The topping wireD. The life-raft28.The ______belongs to the anchor handling equipment.A. chain lifterB. winch barrelC. slewing rimD. warping drum29.If a hydraulic pump is overheating, the cause may be ______.A. excessive internal leakage in the pumpB. low discharge pressure and fluid flowC. excessive fluid level in the hydraulic reservoirD. operation of the pump at 100% efficiency30.Less scale formation occurs in a flash evaporator than in a submerged tube evaporator because______.A. the distillate produced has greater purityB. no boiling occurs on heat transfer surfacesC. evaporation occurs at a higher rateD. the incoming feed is at a higher temperature31.Which of the following descriptions best identifies the operating principal of a flash-typeevaporator?A. Sea water is heated to boiling temperature while under a vacuum.B. Sea water is passed over heated plates in a thin film.C. Heated sea water is injected into a vacuum chamber.D. Sea water is forced through a heated eductor.32.The ______stage air compressors are widely used on board the ship.A. singleB. IIC. IIID. multiple33.Sludge may form in the crankcase of an air conditioning compressor as a result of ______.A. bubbling refrigerantB. overheating and oxidationC. lowered operating temperaturesD. reducing the cloud or flash point34.A feeler or thermal bulb is used for the expansion valve to ______.A. detect the temperatureB. detect the pressureC. heat the refrigerantD. accelerate the refrigerant35.When adding oil to a refrigeration system, precautions must be taken to ensure that ______.A. the compressor suction pressure is not too highB. all air is purged from the pump and charging fittingsC. the high pressure cutout switch is held open to prevent accidental startingD. the condenser is completely shutdown first36.“Flooding back” is a condition where the liquid refrigerant ______.A. vaporizes in the condenserB. reaches the compressor through the suction lineC. flashes in the liquid lineD. condenses in the receiver37.Zinc rods are installed on the ______in the refrigeration system.A. liquid strainerB. liquid receiverC. saltwater condenserD. evaporator38.The division of kilowatt load between two paralleled alternators is determined by the ______.A. amount of field excitation of the leading machineB. load-speed characteristics of the governorsC. amount of field excitation to the lagging machineD. type of alternator39.A constant output voltage from an AC generator is maintained by the ______.A. prime mover governorB. exciter generatorC. voltage regulatorD. reverse power relay40.Universal motors will operate on AC or DC current, and are generally found in ______.A. portable toolsB. large pump motorsC. turbo electric main motorsD. forced draft fans41.The diesel engine consumes considerably less fuel than the steam engine for equal output,______enables a motor-ship to load more cargo.A. whyB. whichC. in whichD. on which42.Power transformers are rated in ______.A. kilowattsB. ampere-turnsC. kilowatt-voltsD. kilovolt-amperes43.The operating medium for control systems may be ______.A. compressed airB. hydraulic oilC. electricityD. all of the above44.The jacket water temperature in a diesel engine closed freshwater cooling system is normallycontrolled by ______.A. regulating the level of corrosion inhibitor in the primary cooling systemB. the level of the freshwater expansion tankC. varying the engine load to meet temperature requirementsD. the operation of the thermostatic valve45.To correct a hunting problem in a main propulsion diesel engine hydraulic governor, you should______.A. increase the governor oil pressureB. adjust the speed droop settingC. adjust the speeder spring travelD. adjust the compensating needle valve46.Electrical leads and insulation on a motor should be painted with ______.A. heat-resisting acrylicB. heat-resisting aluminumC. insulating varnishD. insulating white lead47.An ohmmeter can be used to measure ______.A. current flow in a circuitB. voltage between two points in a circuitC. resistanceD. power48.Engine protection by means of an alarm or shutdown control can be obtained with devices that aresensitive to ______.A. temperatureB. pressureC. engine speedD. all of the above49.The first requirement for logical trouble shooting of any system is the ability to ______.A. collect all available data on a casualtyB. recognize normal operationC. identify the probable cause of a symptomD. isolate the faulty component50.In order to inspect both piston and cylinder wall thoroughly, the cylinder cover should be taken offand the piston should be ______.A. craned outB. rolled outC. lifted outD. turned out51.In a diesel engine, an extremely leaking exhaust valve can cause ______.A. misfiringB. pre-ignitionC. interrupted scavengingD. reduced scavenging52.Sacrificial zinc anodes are used on the saltwater side of diesel engine heat exchangers to ______.A. reduce electrolytic action on heat exchanger metalsB. keep heat transfer surfaces shiny and cleanC. prevent rapid accumulation of marine growthD. provide a protective coating on heat exchanger surfaces53.Poor combustion in a diesel engine can be caused by ______.A. high compression pressureB. low intake air temperatureC. low exhaust pressureD. high scavenge air temperature54.Any increase in the exhaust back pressure of a four-stroke/cycle diesel engine will ______.A. reduce engine horsepower outputB. aid in silencing the exhaust noiseC. increase the mean effective pressureD. contribute to effective cylinder scavenging55.If the jacket water temperature of an operating diesel engine suddenly rises above normal, thecause can be attributed to ______.A. an overfilled expansion tankB. excess chromate treatment of the jacket waterC. a clogged raw water sea suctionD. cavitation erosion of the heat exchanger tubes56.The bearing cap and shell are replaced and tightened up until ______.A.the “ nip “ is zeroB.the “ nap “ is zeroC.the “ gap “ is correctD. t he “ clearance “ is correct57.______, the engine must be stopped immediately.A. Should knocking occurB. If knocking occurC. Should if knocking occursD. If occur knocking58.Each journal and pin should be examined for ______and grooving.A. bridgesB. recessesC. rearsD. ridging59.Which of the motors for the devices listed below is fitted with an instantaneous overload relay?A. FanB. PumpC. WinchD. Machine tool60.A centrifugal pump can’t supply water after starting. You should check the ______.A. discharge valveB. power supplyC. packing glandD. bearing lubrication61.A built-up exhaust valve is one in which ______.A. the stem and heads are made of different materialB. low-alloy steel is used throughoutC. a replaceable valve disk is welded to the headD. the self-centering action comes from motion of the valve stem in the guide62.It is well known that the whole power distribution of the ship’s electrical services mainly dependon the ______.A. sub-boardsB. main switchboardsC. emergency switchboardsD. distribution boards63.Oil mist detectors are usually used on board to detect oil mist density within ______.A. the engine crankcaseB. the engine scavenge boxesC. drain tanksD. fuel tanks64.The ______is used to measure power.A. ammeterB. voltmeterC. wattmeterD. frequency meter65.Keep compartment ______as the gas given off can be dangerous.A. well ventilatedB. well cleanC. in good orderD. more room66.The value of GM still remains one meter, meanwhile we can pump the ballast water to ______theship on the even keel.A. makeB. putC. keepD. get67.We have stayed at Shanghai port for a long ti me. The fouling on the ship’s hull greatly increasesher ______.A. powerB. speedC. resistanceD. thrust force68.The conventions under which the port state control inspection is carried out include all thefollowing except ______.A. SOLAS 74B. MARPOL 73/78C. STCW 78/95D. ISM Code69. The auxiliary steering gear must be capable of being brought speedily into operation and be ableto put the rudder over from 15 degrees on one side to 15 degrees on the other side in no more than ______with the ship at its deepest service draught and run ahead at the greater of one half of the maximum service speed or ______.A. 28 seconds/7 knotsB. 28 seconds/14 knotsC. 60 seconds/7 knotsD. 60 seconds/14 knots70.Tell your men ______the rules and procedures of working when dismantling the equipment.A. not to go againstB.don’t go againstC. not go to againstD. to not go against71.Which of the listed classes of fire is considered as one involving electrical equipment?A.Class ‘ A ’B.Class ‘ B ’C.Class ‘ C ’D.Class ‘ D ’72.After a fire has been extinguished in a closed space, personnel may safely enter the space when______.A. smoke density has been decreased sufficiently to see the bulkhead opposite the compartment'sentranceB. a lifeline and explosion proof flash light are usedC. all smoke and toxic fumes are removed and an adequate oxygen supply is presentD. overhaul has been completed to remove any possible source of re-ignition73.Under the provisions of applicable international conventions, the officers to conduct port statecontrol inspection must be duly authorized by ______.A. the companyB. the Government of the countryC. the organization recognized by the AdministrationD. the IMO74.During inspection of oil and oily mixtures from machinery spaces, which of the following factorsshould be taken into account by the PSCO?A. The quantity of oil residues generated.B. The capacity of sludge and bilge water holding tank.C. The capacity of the oily water separator.D. All of the above.二、关联题（每组关联题题干下有4个小题，每小题4个选项）第一组：The electrical remote control system is commonly used in modern steering installations since it uses a small control unit as transmitter on the bridge and is simple and reliable in operation.The control box assembly is mounted on the steering gear. Movement of the bridgetransmitter results in electrical imbalance and current flow to the motor in the control box. The motor drives, through a flexible coupling, a screw shaft, causing it to turn. A screw block on the shaft is moved and in turn moves the floating lever to which a control rod is attached. The control rod operates the slipper ring or swash plate of the variable delivery pump. A cut-off leverconnected to the moving tiller will bring the floating lever pivot and the lever into line at right angles to the screw shaft axis. At this point the rudder angle will match the bridge lever angle and the pumping action will stop. For local manual control, the electrical control is switched off and a small hand-wheel is connected to the screw shaft. Rotation of the hand-wheel will move thefloating lever and bring about rudder movement as desired.75.This passage is mainly on ______.A. the electrical remote control of main enginesB. the electrical control equipment of steering gearsC. the bridge remote control of main enginesD. the control box assembly in steering gear compartment76.The advantage of the control equipment is ______.A. that the transmitter is on the bridgeB. that local manual control can be achieved.C. that remote control cab be achieved.D. simple in construction and reliable in operation.77.The function of the cut-off lever is ______.A. to provide electrical signalB. to provide feed-backC. to provide local manual controlD. to provide right rudder angle78.Another name for the “swash plate” in the variable delivery pump is ______.A. tiltable discB. gravity discC. distributing discD. catch plate三、中译英（共2题，请将答案写在答题纸上）79.当船舶短途航行时，在《油类记录簿》上应每周记录残油（油渣）的数量。
海事局海船船员适任证书全国统考试卷：36852
中华人民共和国海事局2005年第1期海船船员适任证书全国统考试题(总第36期)科目：船舶电气试卷代号：852适用对象：750-3000KW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。
1. 一台电动机，在20℃时其励磁线圈（铜线）的电阻为100Ω,当电动机运行一段时间后,测出其电阻为120Ω，这时励磁线圈温度应是_____℃。
（设铜线的温度系数=0.004/℃）A. 300B. 50C. 70D. 2802. 某电路需要一电阻用来承载固定大小的电流0.3A, 下列型号中最为恰当的是：A. B. C. D.3. 把两个耐压值为63V，电容量分别为C1=60μF、C2=30μF的两个电容器串联后，接于90V直流电源上，其等效电容量C为______，C1的工作电压为______。
A. 90μF／60VB. 20μF／30VC. 90μF／30VD. 20μF／60V4. 如图所示电路中，在开关S打开和闭合时，I分别为：A. 0A和∞B. 2A和∞C. 0A和0AD. 0A和1A5. 一直流电阻电路如图所示，它由四个电阻串联而成，利用几个开关的闭合或断开，可以得到各种电阻值。
设四个电阻值均为R ，当S1、S4闭合，而S2、S3打开时， R AB为______；当S2、S4闭合、S1、S3打开时， R AB为______。
A. 2R／3RB. 3R／2RC. 3R／4RD. 4R／4R6. 真空中的磁导率为______；铁磁物质的磁导率为______。
A. 常数/常数B. 变量/常数C.常数/变量D. 变量/变量7. 若通过匝数为N的线圈电流为I,产生磁动势F的值为：A. INB. I/NC. I2ND. IN28. 左手定则中，拇指所指的方向是：A. 电流方向B. 磁力线方向C. 受力方向D. 感生电流方向9. 如图所示的铁心线圈电路中，在开关S闭合及再打开的瞬间，线圈的自感电动势极性是：A. 闭合时，上正下负；断开时，上正下负B. 闭合时，上负下正；断开时，上负下正C. 闭合时，上正下负；断开时，上负下正D. 闭合时，上负下正；断开时，上正下负10. 最大值为有效值的倍的关系，只适用于：A. 脉冲交流电B. 直流电C. 正弦交流电D. A+B+C11. 已知e1=141sin314t V，e2=380sin（628t+30°）V。
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中华人民共和国海事局2005年第1期海船船员适任证书全国统考试题(总第36期)科目：船舶辅机试卷代号：842适用对象：750-3000KW船舶轮机长/大管轮（本试卷卷面总分100分，及格分为70分，考试时间为100分钟）答题说明：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. 空压机的排气量一般是指单位时间内排送的______状态的空气体积。
A. 排气B. 第一级吸气C. 标准D. 第二级吸气2. 活塞式空气压缩机的气阀中因阀片本身具有弹性而常不设弹簧的是：A.环片阀B.球面碟状阀C.条片阀D. 网状阀3. 按理论循环计算，各级______相等时总耗功最省。
A. 压差B. 压缩比C. 温升D. 多变指数4. 船用空压机自动控制一般不包括:A. 自动起停B. 自动卸载和泄放C. 冷却水供应自动控制D. 滑油温度自动控制5. 两台向空气瓶供气的船用空压机分别由两只压力继电器自动控制起停，如产生调节动作的压力值分别为2.4、2.5、2.9、3.0（MPa），气瓶在______MPa压力范围内有可能两台空压机同时运转。
A. 2.4 ～ 3.0B. 2.5 ～ 2.9C. 2.4 ～ 2.9D. 2.5 ～ 3.06. 空压机气阀检修组装好后，可用煤油试漏，允许滴漏量为每分钟不多于______滴。
A. 5B. 10C. 20D. 307. 船用空压机起动时可用______方法卸载。
A. 顶开吸气阀B. 排气泄放C. 截断进气D. A或B8. 空压机反转可能会导致:A. 吸排方向改变B. 电动机过载C. 润滑困难D. 水冷却困难9. 巡回检查发现工作中的空压机已经断水，应:A. 尽快供水B. 卸载运转,尽快供水C. 停车,供水冷却,拆检D. 停车,自然冷却,拆检10. 管理中空压机排气量减小的最常见原因是:A. 气阀和活塞环漏泄B. 冷却不良C. 余隙增大D. 安全阀漏泄11. 液压马达在使用中，错误的做法是：A．保证输出轴与被拖动机械的同心度B．壳体内的油压通常保持在0.1～0.3MPaC．一般工作油温不宜超过50℃D．绝对不可以把热油突然供入冷态的液压马达中12. 液压马达的低速稳定性差一般不是因为：A．马达的安装质量差 B．内部泄漏增加C．马达回油压力过低 D．压力控制阀调整压力过低13. 轴向柱塞泵比径向柱塞泵容积效率高主要是因为：A. 制造精度高B. 受力状况好C. 漏泄部位少D. 平面配油，磨损间隙自动补偿14. 普通型调速阀是由节流阀和定差______而成。
A. 溢流阀串联B. 溢流阀并联C. 减压阀串联D. 减压阀并联15. Y型三位四通换向阀的中位机能是:A. 活塞浮动,在外力作用下可移动,泵不卸荷B. 活塞浮动,在外力作用下可移动,泵卸荷C. 活塞处于闭锁状态,泵卸荷D. 液压缸闭锁,可用于多个换向阀的并联工作16. 径向柱塞泵最主要的漏泄途径一般是在：A. 柱塞与缸体之间B. 配油轴与缸体之间C. 轴封D. 端盖与泵壳之间17. 调节先导型溢流阀无法使系统油压升高不会是因为：A. 外控油口漏油B. 导阀关不严C. 主阀阻尼孔堵塞D. 导阀打不开18. 在液压油系统中，吸油滤器一般采用：A．线隙式 B．纸质式 C．网式 D．化学纤维式19. 关于径向柱塞泵的下列说法中对的是：A. 配油轴所受径向力是平衡的B. 浮动环在工作中能移动而不转动C. 容积效率往往不如轴向柱塞泵高D. 能够承受的工作油压比轴向柱塞泵高20. 舵叶上的水作用力大小与______无关。
A. 舵角B. 舵叶浸水面积C. 舵叶处流速D. 舵杆位置21. 舵叶的平衡系数过大会造成：A. 回舵扭矩增大B. 转舵速度变慢C. 船速下降D. 转舵扭矩增大22. 舵机浮动杆追随机构设储能弹簧主要是为了：A. 操纵浮动杆所需力可减小B. 舵叶受风浪袭击可暂时移位C. 大舵角操舵可连续进行，主泵可较长时间保持全流量D. 防止浮动杆受力过大而损坏23. 对于舵机的开航前试验，说法不确切的是：A．值班轮机员就会同值班驾驶员分别在舵机房和驾驶室一起试验B．在驾驶室用遥控按钮起动一套液压泵机组C．先后向一舷及另一舷作5°、15°、25°、35°的操舵试验D．有备用遥控系统和应急操舵系统，也必须试验24. 舵机公称转舵扭矩是按正航时确定，因为：A. 大多数情况船正航B. 正航最大舵角比倒航大C. 同样情况下正航转舵扭矩比倒航大D. 正航最大航速比倒航大得多25. 主操舵装置应能在最深航海吃水，并以最大营运航速前进时，将舵在______秒内从一舷______转至另一舷______。
A. 28；35°～35°B. 28；35°～30°C. 30；35°～35°D. 30；35°～30°26. 舵机液压系统安全阀的流量排放能力应不小于液压泵总流量的：A. 110％B. 100％C. 125％D. 150％27. 阀控型舵机改变转舵方向是靠改变：A. 主泵转向B. 辅泵供油方向C. 主泵变量机构偏离中位方向D. 换向阀阀芯位置28. 液压油透明而闪光是因为：A．液压油是正常的 B．液压油已经氧化变质C．液压油中含有杂质 D．液压油中含有金属粉末29. 阀控型液压随动舵机控制系统的反馈信号发送器一般由______带动。
A. 换向阀B. 舵柄C. 舵机房的遥控伺服机构D. 转舵油缸柱塞30. 四缸柱塞式液压舵机工况选择时，应避免：A. 同柱塞液压缸组使用B. 同舷液压缸组使用C. 对角线液压缸组使用D. A与B31. 1万吨以上油船舵机某液压缸严重漏油影响工作时应:A. 修复后再工作B. 30ｓ内重新获得操舵能力C. 45ｓ内重新获得操舵能力D. 1min内重新获得操舵能力32. 舵机远控系统从驾驶台到舵机房的信号传递目前多用______方法。
A. 机械B. 液压C. 电力D. 无线电信号33. 采用双缸拨叉式转舵机构，如果改变柱塞的直径，可获得：A. 不同的转舵角度B. 不同的转舵速度C. 相同的公称扭矩D. 不同的公称扭矩34. 当浮动杆式的追随机构中的控制点铰接处因磨损而横向间隙增大时______。
A. 操舵角度变小B. 操舵角度变大C. 操舵速度变慢D. 转舵滞后35. 伺服油缸式舵机遥控系统控制油泵常采用：A. 齿轮泵B. 螺杆泵C. 叶片泵D. 柱塞泵36. 伺服液压缸式遥控系统中，油路锁闭阀的作用是在______时帮助稳舵。
A. 换向阀有漏泄B. 伺服活塞漏油C. 液控旁通阀漏泄D. A与B37. 采用伺服油缸式遥控系统的舵机在______情况下会冲舵。
A. 辅泵流量过大B. 电磁换向阀一端线圈断路C. 电磁换向阀一端弹簧失效D. 液控旁通阀卡在常通位38. 对舵时中位的操舵角和实际舵角的偏差应:A. ≯0.5°B. ≯1°C. ≯2°D. 无偏差39. 在舵机液压系统的安全阀的调试过程中，必须注意防止系统中的油压超过耐压试验的数值，安全阀每次开启的时间也不宜超过_________秒。
A．10 B．15 C．30 D．6040. 舵机采用辅泵油压启阀式主油路锁闭阀可以：A. 自动隔断漏油严重的油缸供油B. 隔断因故需停用的转舵油缸供油C. 舵到位时隔断主泵和转舵油缸D. 辅泵失压时隔断主油路41. 专门用于液压系统冲洗的清洗液，一般选用：A. 植物油B. 环烷基油C. 煤油D. 柴油42. 液压泵运行时产生噪音的原因不会是：A. 系统混有空气B. 工作压力高C. 输出轴不对中D. 泵和马达损坏，内漏严重43. 液压马达产生转矩低的原因不会是：A. 液压泵流量小B. 变量马达排量选得太小C. 液压油粘度等级低D. 变量马达排量选得太大44. 舵机液压系统中，由于主油路锁闭不严一般会造成：A．滞舵、转舵时间达不到规范 B．冲舵、跑舵C．转舵时间达不到规范、冲舵 D．跑舵、滞舵45. 不会使液压舵机转舵太慢的是：A. 主泵容积效率低B. 泵控型舵机辅泵容积效率低C. 转舵油缸旁通阀漏D. 阀控型舵机换向阀内漏泄太大46. 四个转舵油缸有一个漏油，需采用应急工况，舵机转舵速度：A. 约降低一半B. 约提高一倍C. 不变D. 约降低1/447. 有四个柱塞式转舵油缸的舵机如斜对角一对油缸损坏漏油，则：A. 用单泵及其余两缸工作B. 用双泵及其余两缸工作C. A或BD. 不能工作48. 臭氧的杀菌消毒作用的原理是因其：A. 毒性大B. 有强碱性C. 有强酸性D. 易分解出有强氧化作用的单原子氧49. 制冷装置中吸气管是指从______通压缩机的管路。
A. 冷凝器B. 蒸发器C. 膨胀阀D. 回热器50. 在P-H图上查得到制冷压缩机进出口h1=402kJ/kg,h2=464kJ/kg,冷凝器出口h3=250kJ/kg,膨胀阀进口h3’=240kJ/kg,蒸发器出口h1’=392kJ/kg.则单位制冷量和单位制排热量为______和______kJ/kg。
A. 152/224B. 172/224C. 152/214D. 172/21451. 在压缩机状况和其它温度条件不变时，随着吸气过热度减小，制冷压缩机的轴功率：A. 增大B. 不变C. 减小D. 随冷剂种类不同而变52. ______一般不会造成制冷剂在膨胀阀前“闪气”产生气体。
A. 冷凝压力太低B. 液管流阻过大C. 液管吸热过多D. 液管上行高度大53. 对制冷剂热力性质的错误要求是：A. 冷凝压力越低越好B. 标准沸点要求比欲制冷的温度低C. 气化潜热要较大D. 临界温度要较高54. 关于制冷装置中的回热器，说法不对的是：A．可以获得较大的过冷度 B．是高压冷凝液体与低压制冷剂气体的热交换器C．可提高压缩机的吸气过热度 D．可提高制冷装置的制冷系数55. 下列关于冷冻机油的说法中错的是：A. 有时可用来控制卸载机构动作B. 因制冷剂不同而应选不同的牌号C. 因用于食品冷库或是空调装置而选不同的牌号D. 难免会有一部分在工作中进入蒸发器56. 当制冷压缩机输气系数降低时，其______。
A. 排压升高吸压降低B. 排压、吸压降低C. 排压、吸压升高D. 吸压升高排压降低57. 压缩机采用双阀座截止阀是为了:A. 加强阀气密性B. 减小阀流动阻力C. 可启闭多用通道D. 提高阀使用寿命58. 制冷装置的设备（1）压缩机安全阀（2）压力继电器（3）冷凝器安全阀，其动作压力应：A. (1)大于(2)大于(3)B. 与A相反C. （3）大于（1）大于（2）D. 与C相反59. 我国规定氟利昂压缩机曲轴箱滑油温度运行时不应高于______℃。