轮机英语多媒体课件.ppt

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1、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.centripetalpumpThrougha_______pump,theliquidistransferredfromthesuctiontothedischargebythemechanicalvariationofthevolumeofachamberorchamber

2、s.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.multistagepum

3、psC.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_______accord

4、ingtoitsworkingprinciple.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.1097Acentrifugalpumpproducestherequiredpressure

5、energybymeansofarotating_______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.d

6、ouble-screwpump在三螺杆泵中，只有中间螺杆被驱动。C.triplescrewpumpD.centripetalpumpAScrewpumpbelongsto_______accordingtoitsworkingprinciple.根据工作原理，螺杆泵属于容积式泵。A.reciprocatingpumpsB.positivedisplacementpumpsC.centrifugalpumpsD.centripetalpumps1095B1096C1097B1098B1099C1100B1101Theamountoffluiddeliveredbyascre

7、wpumpcanberegulatedby_______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