机电英语答案.docx

机电英语答案.docx

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机电英语答案

机电英语答案

【篇一：

机电专业英语复习题及答案】

t>一．选择题

1.ifallpointsinalinkagemoveinparallelplanesthesystemundergoesplanarmotionandthelinkagemaybedescribedasa______.

a.planarmotionb.planarlinkagec.jointsd.slide

2.thoughframematerialanddesignshouldhandledamping,

_____aresometimesbuiltintoframesectionstohandlespecificproblems.

a.beamsb.holesc.dampersd.screw

3.themaximumallowabledeflectionofashaft______determinedbycriticalspeed,gear,orbearingrequirements.

a.oftenb.mustc.wasd.isusually

4.wewillhaveto_____tobetterandbettersolutionsaswegeneratemoreinformation.

a.repeatmanytimesb.iteratingc.iterated.tryways

5.ifaproductconfigurationis_______specifiedandthenexaminedtodeterminewhethertheperformancerequirementsaremet.

a.finallyb.tentativelyc.temporaryd.havebeen

6.manufacturingcanbedefinedasthe_____ofrawmaterialsintousefulproductsthroughtheuseoftheeasiestandlest-expensivemethods.

a.transformationb.processingc.processd.transforming

7.theplanerandkneetypesofmillingmachineis_____becauseofitsflexibility.

a.usedmostcommonlyb.mostpopularc.themostcommonlyusedd.mostpowerful

8.asaresult,thesystemwillvibrateatthefrequencyofthe_____forceregardlessoftheinitialconditionsornaturalfrequencyofthesystem.

a.actionb.excitationc.outd.act

9.beforetwocomponentsareassembledtogether,therelationshipbetweenthedimensionsofthematingsurfaces_______.

a.mustbegivingoutb.shouldprintedclearlyc.mustbespecifiedd.shouldbeclearlynoted

10.themainpracticaladvantageoflowerpairsistheirbetterabilitytotraplubricantbetweentheir______surfaces.

a.envelopingb.matingc.outerd.outside

11.theword______itselfusuallyreferstothedeteriorationofmetalsandceramics,whilesimilarphenomenainplasticsgenerallycalled______.

a.recrystallization?

.corrosionb.recrystallization?

degradation

c.degradation?

corrosiond.corrosion?

degradation

12.mostframes_______castiron,weldsteel,composition,orconcrete.

a.aremadefromb.aremadeupof

c.wasproducedbyd.wasconsistof

13.rotatingshaftsparticularlythosethatrunathighspeeds,mustbedesignedtoavoidoperationat______speeds.

a.lowb.overloadc.criticald.hollow

14.althoughcastironisafairlycheapmaterial,eachcastingrequiresa______。

a.patternb.modelc.moldd.patent

15.theterm______isusedtodescribejointswithsurfacecontact,aswithapinsurroundedbyahole.

a.highpairb.lowpairc.surfacepaird.rotarypair

1-5：

bcdcb6-10：

acbca11-15dacab

二．阅读

1.lassiewasabigdog.shewasveryclever.shewasalwayshelpingsomeone.

oncesomebadmentooksomemoneyfromanoldman.theytiedhimupwitharopeandlefthimonthefloor.theykeptlassieinanotherroom.lassietriedtoopenthedooroftheroom.butshecouldn’t.therewasalargewindowintheroom,butitwastoohighforlassietoreach.shepulledachairovertowindowandstoodonit.shepushedandpulledandpulledatthewindowandatlastgotitopen.withagreatjump,shegotout.

lassiecamebackintothehouseandfoundtheroomwheretheoldmanwasleft.sheuntiedtheroperoundtheoldman’sarmsandlegs.thenshehelpedhimoutofthehouseanddowntheroadtothenearesthouse.

（）1.lassiewas______.

a.ababyb.acatc.adogd.agirl

（）2.oncesomebadmentoolsomemoneyfrom______.

a.ayoungmanb.ayoungwomanc.anoldwomand.anoldman

（）3.lassie______thedooroftheroom.

a.didn’topenb.openedc.shutd.didn’tshut

（）4.______untiedtheoldman.

a.agirlb.acatc.awomand.lassie

（）5.______caughtthebadmen.

a.thedogb.lassiec.thepolicemend.thegirl

2.mr.georgeworksattheschoollostandfound.heworksverycarefully.everyday,whenhegetsalostthing,hetakesnotesaboutit.therearepens,books,schooluniforms,keys,walkmansandmanyotherthingsinthelostandfound.mostofthemarethestudents’.ifyouloseyourthings,it’seasyforyoutogotothelostandfoundforhelp.butyoumusttellmr.georgewhatitisanditscolorandthedaywhenyoucan’tfindit.ithinkmr.georgeisveryhelpful,andyouwillbehappywhenyoufindthelostthere.

（）6.whoworksattheschoollostandfound?

a.mr.brownb.mr.kingc.mr.georged.nobody

（）7.thereare________thingsinthelostandfound.

a.nob.fewc.afewd.many

（）8.mostthingsmr.georgetakescareofarethe________.

a.boys’b.girls’c.students’d.teachers’

（）9.ifyouloseyourthings,you’dbettergotoask________.

a.benb.mr.georgec.yourteacherd.yourparents

（）10.ifyouloseyourthingsandgotothelostandfoundforhelp,youneedn’ttellmr.george________.

a.whatitisb.howmuchitisc.itscolord.thedaywhenyoulostit.

3.thestudentswerehavingtheirchemistry（化学）

class.missliwastellingthechildrenwhatwaterwaslike.afterthat，sheaskedherstudents，what’swater？

”noonespokeforafewminutes．missliaskedagain，“whydon’tyouanswermyquestion？

didn’titellyouwhatwaterislike？

”

justthenaboyputuphishandandsaid，“missli，

youtoldusthatwaterhasnocolourandnosmell．butwheretofindsuchkindofwater？

thewaterintheriverbehindmyhouseisalwaysblackandithasabadsmell．”

mostofthechildrenagreedwithhim．

“i’msorry，children．”saidtheteacher，“ourwaterisgettingdirtieranddirtier．that’saproblem．

（）11.thestudentswerehavingtheir_______class．

a．englishb．chinesec．chemistryd．maths

（）12．missliwastellingthechildrenwhat______waslike．

a．waterb．airc．earthd．weather

（）13．aboysaid，”thewaterintheriverbehindmyhouseisalways_______．”

a．whiteb．blackc．cleand．clear

（）14．mostofthechildren_______theboy．

a．agreedwithb．wrotetoc．heardfromd．sentfor

（）15．thewaterintheriverhascolourandsmellbecauseitisgetting_______．

a．moreandmoreb．lessandless

c．cleanerandcleanerd．dirtieranddirtier

1-5:

cdadc6-10:

cdcbb11-15:

cabad

4.workingdrawingsarethecompletesetofstandardizeddrawingsspecifyingthemanufactureandassemblyofaproductbasedonitsdesign.thecomplexityofthedesigndeterminesthenumberandtypesofdrawings.workingdrawingsmaybeonmorethanonesheetandmaycontainwritteninstructionscalledspecifications.

workingdrawingsareblueprintsusedformanufacturingproducts.therefore,thesetofdrawingsmust:

（a）completelydescribetheparts,bothvisuallyanddimensionally;（b）showthepartsinassembly;（3）identifyalltheparts;and（4）specifystandardparts.thegraphicsandtextinformationmustbesufficientlycompleteandaccuratetomanufactureandassembletheproductwithouterror.generally,acompletesetofworkingdrawingsforanassemblyincludes:

（1）detaildrawingsofeachnonstandardparts.

（2）anassemblyorsubassemblydrawingshowingallthestandardandnonstandardpartsinasingledrawing.

（3）abillofmaterials（bom）.

（4）atitleblock.

adetaildrawingisadimensioned,multiviewdrawingofasinglepart

describingthepart’sshape,size,material,andsurfaceroughness,insufficientdetailfortheparttobemanufacturedbasedon

thedrawingalone.detaildrawingsareproducedfromdesignsketchesorextractedfrom3-dcomputermodels.theyadherestrictlytoansistandardsandthestandardforthespecificcompany,fordimensioning,assigningpartnumbers,notes,tolerances,etc.

inanassembly,standardpartssuchasthreadedfastenersandbearingsarenotdrawnasdetails,butareshownintheassemblyview.standardpartsarenotdrawnasdetailsbecausetheyarenormallypurchased,notmanufactured,forassembly.

forlargeassembliesorassembledwithlargeparts,detailsaredrawnonmultiplesheets,andaseparatesheetisusedfortheassemblyview.iftheassemblyissimpleorthepartsaresmall,detaildrawingsforeachpartofanassemblycanbeplacedonasinglesheet.

multipledetailsonasheetareusuallydrawnatthesamescale.ifdifferentscalesareused,theyareclearlymarkedundereachdetail.also,whenmorethanonedetailisplacedonasheet,thespacingbetweendetailsiscarefullyplanned,includingleavingsufficientroomfordimensionsandnotes.

1.basedonthemessage,whichofthefollowiswrong?

a）standardpartsneedn’tdrawnasdetails

b）forsimpleparts,sometimesneedn’ttodrawthedetailworkingdrawing

c）forlargeassembliesdetailsmaydrawnonmultiplesheets

d）ifdifferentscalesusedinasinglesheet,theyshouldclearlymarkedundereachdetail

2.workingdrawingsforanassemblymaynotincludes:

?

a）bomb）titleblock

c）anassemblyorsubassemblydrawing

d）detaildrawingsofallparts.

3.fordetaildrawing,whichoneofthefollowingstatementisnottrue?

a）shouldnothasdifferentscales

b）detaildrawingcanproducedfromdesignsketchesorextractedfrom3-dcomputermodels.

c）detaildrawingisadimensioned,multiviewdrawingofasinglepart

d）shouldadherestrictlytoansistandards

4.fromthemessagewecaninferansiis______?

a）asetoflawb）asetofnotification

c）anorganizationd）ieeegovernment

5.thetopicofthemessageis______?

a）howtodesignworkingdrawings.

b）workingdrawing’scharacterandthekeyinfluenceofhowtodrawaworkingdrawing

c）inthedesignprocess,whatshouldbeconsidered?

d）whatisworkingdrawing

bcacd

5.oneprincipleaimofkinematicsistocreate（design）thedesiredmotionsofthesubjects’mechanicalpartsandthenmathematicallycomputethepositions,velocities,andaccelerations,whichthosewillcreateonthepa