13春学期《矿山机械》在线作业3（13 spring semester mining machinery online homework 3）

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1、13春学期《矿山机械》在线作业3（13springsemesterminingmachineryonlinehomework3）NortheasternUniversity14spring13autumnEastbig13springsemester"miningmachinery"onlinehomework3Totalscore:100testtime:-RadioexaminationAmultiple-choicequestionThereare5questions(25points)OneCagehoistingshouldbeused_____

2、________________phasevelocitymap.A.threeB.fourC.fiveD.sixFullmarks:5TwoWhenwillalinethroughtheswitchintotwoparallellines,theswitchis_____________.A.rightsingleopenturnoutB.symmetricalturnoutC.triangularturnoutD.crossoverturnoutE.Fullmarks:5ThreeTheskiphoist,hoistingropereferstothe

3、maximumlengthofsuspended__________________.A.totallengthofwireropeB.heightofderrick,heightofloadinganddepthofmineC.minedepthConnectinglengthofD.steelwireropeFullScore:5points4.hoistspeedofthehorizontalaxisis__________.A.LiftcontainerpositionB.accelerationC.speedD.timeFullmarks:5Fi

4、veTheslopeis__________________________.TheratioofthelengthofalinetotheheightdifferenceofaA.TheratioofhorizontallengthtoheightdifferenceofB.sectionTheinclinationoftheC.lineSinusoidalvalueofD.lineinclinationFullmarks:5NortheasternUniversity14spring13autumnEastbig13springsemester"min

5、ingmachinery"onlinehomework3Totalscore:100testtime:-RadioexaminationAmultiple-choicequestion,(atotalof15multiple-choicequestions,atotalof75points.)OneLongdistancebeltconveyortake-upshouldbeusingthe__________________.A.screwtensioningdeviceB.heavyhammertensioningC.steelropewinchten

6、sioningdeviceD.individuallyfixedtensioningmethodFullmarks:5homeworkanswerdidnotupload,firstforeveryonetoreviewtheuse,ifyouneedtoanswerthespecificregistrationofmynametofindpointsTwoMotorvehicletractioncapacitydependsonthe__________________.TractionpowerofA.tractionmotorsTractioncur

7、rentofmotorofB.electriclocomotiveAdhesionforceofC.electriclocomotiveD.abovethreeFullmarks:5ThreeThetransportationequipmentbelongstothecontinuousconveyingequipmentis__________________________.A.beltconveyorB.aerialropewayC.motorvehicletransportD.motortransportFullmarks:5FourThefixe

8、dmodeisusuallyusedforlargerollers