第二章船舶辅助机械

第二章船舶辅助机械1090Avanepumpbelongsto_______accordingtoitsworkingprinciple.根据工作原理，叶片泵属于容积式泵。A.reciprocatingpumpB.positivedisplacementpumpC.centrifugalpumpD.centripetalpump1091Througha_______pump,theliquidistransferredfromthesuctiontothedischargebythemechanicalvariationofthevolumeofachamberorchambers.对于容积式泵，液体通过泵腔室体积的改变从吸入口排至排出口。A.positivedisplacementB.ejectorC.centrifugalD.aircompressor1092Amono-pumpisasingle-screwpump.Thatmeansitconsistsof_______rotor(s).单螺杆泵只有一个转子。A.oneB.twoC.threeD.four1093Thegearandscrewpumpsareclassifiedas____齿轮泵和螺杆泵都属于容积式泵。A.variablestrokepumpsB.multistagepumpsC.positivedisplacementpumpsD.triple-portedpumps1094Gearpumpsareofpositivedisplacementtypepumpsbecausetheydischargeanearconstantamountofliquid_______pressure.不管压力如何，齿轮泵的排量几乎恒定。A.dependingonB.inrelativetoC.regardlessofD.becauseof1090B1091A1092A1093C1094C1095Agearpumpbelongsto_______accordingtoitsworkingprinciple.根据工作原理，齿轮泵属于容积式泵。A.reciprocatingpumpsB.positivedisplacementpumpsC.centrifugalpumpsD.centripetalpumps1096Thepressureheadofapumpisgivenintheunitof_______泵的压头常用“米液柱”高度表示。A.kgB.MPaC.meterfluidcolunmD.Noneoftheaboveistrue.1097Acentrifugalpumpproducestherequiredpressureenergybymeansofarotating_______providedwithvanes.离心泵通过旋转带有叶片的叶轮来产生压力能。A.propellerB.impellerC.circumferenceD.screw1098Thedischargeflowofareciprocatingpumpis____往复泵的排量具有脉冲性。A.steadyB.inpulsationC.continuousD.large1099Ina_______thecenterscrewisdrivenandtheouterscrewsidle.A.singlescrewpumpB.double-screwpump在三螺杆泵中，只有中间螺杆被驱动。C.triplescrewpumpD.centripetalpump1100AScrewpumpbelongsto_______accordingtoitsworkingprinciple.根据工作原理，螺杆泵属于容积式泵。A.reciprocatingpumpsB.positivedisplacementpumpsC.centrifugalpumpsD.centripetalpumps1095B1096C1097B1098B1099C1100B1101Theamountoffluiddeliveredbyascrewpumpcanberegulatedby_______齿轮泵属于容积式泵，排量只能通过改变转子的速度来调节。A.throttlingthepressurelineB.changingthespeedoftherotorC.eitherAorBD.Noneoftheaboveistrue.1102Whileflowingthroughthevoluteinacentrifugalpump,partofthe_______energyoftheliquidisconvertedto_______energy.当液体经过离心泵的涡壳时，部分动能转换成压力能。A.kinetic/pressureB.kinetic/essentialC.pressure/kineticD.pressure/height1103Theamountoffluiddeliveredbyacentrifugalpumpcanberegulatedby_______离心泵的排队量可通过改变压力来调节，出可通过改变转子的速度调节。A.throttlingthepressurelineB.changingthespeedoftherotorC.eitherAorBD.Noneoftheaboveistrue.1104Theamountoffluiddeliveredbyareciprocatingpumpcanberegulatedby______往复泵属于容积式泵，排量通过改变柱塞的速度来调节。A.throttlingthepressurelineB.changingthespeedofthepistonC.eitherAorBD.Noneoftheaboveistree.1105Theamountoffluiddeliveredbyapositivedisplacementpumpcanberegulatedby_____对于容积式泵，排量只能通过改变转子的速度来调节。A.throttlingthepressurelineB.changingthespeedofthedrivingrotorC.eitherAorBD.Noneoftheaboveistrue.1101B1102A1103C1104B1105B1106WhichofthefollowingpumpsareseE-priming,andcandealwithhquidfromalevelbelowthepump?①reciprocating;②rotary;③centrifugal.往复泵和旋涡泵都具有干吸能力，而离心泵没有。A.①onlyB.①and②C.①②and③D.②and③1107Theamountoffluiddeliveredbyahelicalpumpcanberegulatedby_______螺旋泵属于容积式泵，排量只能通过改变转子的速度来调节。A.throttlingthepressurelineB.changingthespeedoftherotorC.eitherAorBD.Noneoftheaboveistrue.1108Apositivedisplacementpumpisthatwherethevolumeofthepumpchamberisalternatelyincreasedto_______andthendecreasedto对于容积式泵，泵腔室体积增大时吸人液体，体积减少时则排出液体。A.drawtheliquidin/forcetheliquidoutB.forcetheliquidout/drawtheliquidinC.suction/drawD.deliver/outlet1109Throttlinginthe______lineofacentrifugalpumpinvolvestheriskofthepumpcavitation.对于离心式泵，节流吸人管路，会产生气蚀危险。A.suctionB.exhaustC.pressureD.discharge1110Asforahydraulicsingleactionvanepump,theinnerwallofthestatorisusuallyof______shape.对于液压单作用叶片泵，静子的内壁通常是圆形。A.circularB.ellipticalC.rectangularD.hexagon1106B1107B1108A1109A1110Al111Asforahydraulicvanepump,whichofthefollowingisincontactwiththevanesduringworking:①therotor;②thepumpshaft;③theexternalsurfaceofthehousing.对于液压叶片泵，工作时，转子与叶片接触。A.①onlyB.②onlyC.①and②D.①②and③ll12Shaftsealinginacentrifugalpumpcanbeeffectedby_______离心泵的轴封可用机械密封，也可用填料箱。A.themechanicalsealB.packedstuffingboxesC.eitherAorBD.neitherAnorBl113Areciprocatingpumpbelongsto_______accordingtoitsworkingprinciple.根据工作原理，往复泵属于容积式泵。A.injectorpumpsB.positivedisplacementpumpsC.centrifugalpumpsD.centripetalpumps1114A_______pumpisthatwherethevolumeofthepumpchamberisalternatelyincreasedtodrawtheliquidinandthendecreasedtoforcetheliquidout.对于容积式泵，泵腔室体积增大时吸人液体，体积减少时则排出液体。A.injectorB.positivedisplacementC.centrifugalD.centripetal1115Whatisthepurposeofareliefvalve?释放阀可用来当排出阀关闭时将液体回流到吸人侧。A.tofill2tanksatthesametimeB.tousepumpatahigherpressureC.toreturnliquidtosuctionsideifdischargevalveisclosedD.Alloftheabovearetrue.1111A1112C1113B1114B1115C1116Thepumpdischargepressurewillbeconsiderablyhigherthanthepressureatthe_______泵的排出压力比泵进口支管的压力要高得多。A.pumpentrybranchB.outletpipeC.impellerD.Noneoftheaboveistree.1117Whichofthefollowingpumpsbelongstocentrifugal-pump?扩压式泵属于离心式泵。A.PistonpumpB.ScrewpumpC.DiffuserpumpD.Water-ringpump1118Thevolutepumpisoneinwhichtheimpeller____对于旋涡泵，叶轮将液体排至渐渐变宽的流道。A.dischargesintoagraduallywideningchannelB.hasstationarydiffuservanesC.producesnokineticenergyD.Alloftheabovearetru