《水泵与水泵站》试题a参考答案（pump and pump station examination questions a reference answers）

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1、《水泵与水泵站》试题A参考答案（PumpandpumpstationexaminationquestionsAreferenceanswers）"Pumpandpumpstation"examinationquestionsAreferenceanswersName,major,class,studentnumberQuestionnumber123456totalscoreGlossary(4items,eachitemof2.5points,atotalof10points):1.waterpumpstationThem

2、ulti-purposemultipurposemultipurposewatercontrolhubiscomposedofapump(apump,apowermachine,atransmissiondevice),acomputerroom,apipeline,awaterinletandoutletstructure,anelectricpowersystem,etc..2.liftTheenergyobtainedfromtheinletofanpumptotheoutletofaunitofwater.3.sha

3、ftpowerInputpowerofpumpshaft.4.waterhammerForsomereason,adramaticchangeinthemovementofelementsinahydraulicmachineryorpipe.Thereare20emptyquestions(0.5pointsperempty,10points):1.vanepumpcanbedividedintocentrifugalpump,axialpump,mixedflowpump.Thecentrifugalpumpworksb

4、ypumpingthecentrifugalforceproducedbythehigh-speedrotationofabladedimpellerwithvanes.2.themainpowerofthewaterpumphaseffectivepower,shaftpower,matchingpower.3.,thewaterpumpcavitationdamagetotheperformanceofthewaterpumpworse,sothattheover-currentcomponentsdamaged,Gen

5、eratenoiseandvibration,shortentheservicelifeoftheunit.4.axialflowpumpshallbestartedwithopenvalve,andcentrifugalpumpshallbeoperatedbywayofoffvalve.5.,accordingtoitsstructuraltype,thepumphousecanbedividedintosubbasetype,drychambertype,wetchambertypeandblocktype.6.the

6、layoutofthepressurepipeisarrangedinparallelarrangement,radialarrangement,parallelarrangementandseriesarrangement.Singlechoice(oneoffour,everyday1points,atotalof10points)TheoperatingpowerofacentrifugalpumpunitisN,andtheflowrateisreducedbyusingavariablevalve,andthepo

7、werischangedfromNtoN.[A]AN(NBN(<=NCN>(NDN(morethanNTheleavesofcentrifugalpumpsaregenerallymadeof[C]A,rotatingparabolicB,twistedsurfaceC,columnarDsphericalWhenthevanepumpoperatesatacertainrevolution,thegreatertheunitweightofthefluiditispumping(theotherphysicalproper

8、tiesofthefluidarethesame),anditsshaftpower[A]ThebiggertheB,thesmallertheC,andtheAconstant.DisnotnecessarilyThepumpspeed,pumpspeedcontrolbyEMBEDEq