第1題Astothehorse-drawnodometercart,thewoodenfigurewouldstrikethegongorbelloncewhen()Liwastraversed.AFiveBTenCFifteenDTwenty第2題Engineeringmachineryhasthefollowingdevelopmenttrends:().AEnergyconsumptionandenvironmentprotectionBIntelligentsystemCSimplecooperationDDiversifiedfunctions正確答案：ABCD第3題Engineeringmachineryreferstoallthemachinesandequipmentnecessaryforearthworkconstruction,pavementconstructionandmaintenance,mobileliftingandloadingoperationsandcomprehensivemechanizedconstructionofvariousconstructionprojects.()第4題Whendesigningorpurchasingmechanicalequipment,weshouldconsideritsintelligentsystemfirst,thenitsenergyconservationandenvironmentprotection.()2第5題多選題Asadevicefordeliveringpressurizedairinacontrolledquantitytoacontrolledlocation,boxbellowsarecomposedofthefollowingparts:()AafixingwoodencaseBapush-pullwoodenhandleCamovablewoodencases=DNoneoftheabove正確答案：ABC第6題AccordingtoZi-gong,oneofthemostimportantandloyaldisciplesofConfucius,“itisalevermadeofwood,heavybehind,andlightinfront.Itraisesthewaterasquicklyasyoucoulddowithyourhand,orasitbubblesoverfromaboiler.It’stermedasshadoof.”Itworksontheprincipleof____.正確答案：:leverage第7題Rammedearth,knownas“hangtu”inChinese,isatechniqueforconstructingfoundations,floors,andwallsusingnaturalrawmaterialssuchasearth,chalk,lime,orgravel.Makingrammedearthinvolvescompactingadampmixtureofsubsoilintoaformwork.()第8題Thesouth-pointingchariotisawheeledvehicle,whichindicatesthesoutherncardinaldirectionwithageartransmission.()第9題Water-poweredrollmillsutilizehydraulicpowertoimpactthemotionofthewaterwheel,andthendrivetherotationofthemillstonesviathetransmissionshaft.()第10題Zi-gong,oneofthemostimportantandloyaldisciplesofConfucius,defined“machinery”asadevicethroughwhichonecanaccomplishgreatresultswiththeexpenditureofaverylittlestrength.Zi-gong’sdefinitionofmachinerywas2300yearspriortothatofJacobLeupold,aGermanphysicistandengineer.()1第1題Whichofthefollowingcannotbeclassifiedasparts?()ABoltsBNutsCInternalcombustionengineDGasket第2題Whatarethetwomajortypesofboltedjoints?()ATensionjointsBKeyedjointsCPinjointsDShearjoints正確答案：AD第3題Tensionjointsfindtheircommonapplicationswhentwothinpartsdemandfrequentinstallationanddisassembly.()第4題Thecostofboltedconnectionswithreamedholesishigherthanthatofordinaryboltedconnections.()第5題Setscrewconnectioncanbearrelativelylargeexternalforce.()第6題Whichofthefollowingpartscanrealizeone-wayfixationontheshaft?()AFlatkeysBGib-headkeysCWoodruffkeysDGuidingkeys第7題Inaccordancewiththefunctionofpinservesinajoint,pinnedjointscanbedividedinto()ACylindricalpinBHoldingpinCHingingpinDSecuringpin正確答案：BCD第8題Theslidingkey,usuallyinstalledonthehub,slidestogetherontheshaft.(

)Woodruffkeysaregenerallyapplicableinheavyexternalworkload.(

)第9題Duetothearcshapeofthekeyway,woodruffkeysadapttotheinclinationofthehub.()Composedoftwogib-headkeyswitha1:100inclination,tangentialkeyisabletotransmitrelativelylargetorque.()第10題Tangentialkeysaregenerallyusedinheavymachinerywithrelativelylargeload,orforshaftswithrelativelylargediameter.()SchoolassignmentofChapter3第1題Themoststrikingdisadvantageofgearmechanismis________.Aunbalancedinertialforce.BWearablelinecontactChighprecisionofmanufacturingandinstallationgeneratehighcost.DNotsuitableforlong-distancedinter-shafttransmission.第2題Geartransmissiontechnologyhasbeenwidelyused,forinstance,machineriesofhoisting,transportation,petroleum,chemicalindustry,construction,coal,lightindustry,textileandprecision.()第3題Thebiggestdisadvantageofcammechanismis().ADifficulttobalancetheinertialforceBPointandlinecontactsCcomplicateddesignDUnabletoachieveintermittentmotion第4題Cammechanismismainlycomposedofthefollowingthreebasiccomponents:().ACamBDrivenbarCFixedchassisDConnecting-rod正確答案：ABC第5題Cammechanismfunctionsasatransmitter,guideandcontroller.()第6題Asakindofcomponentwithcurvedcontourorgroove,camcontactswiththedrivenlinkthroughalowerpair.Inthisway,thedrivenlinkobtainscontinuousordiscontinuousarbitrarymotion.()第7題Whenthediameteroftheratchetisinfinite,itbecomes(

A

).Atthistime,theunidirectionalrotationoftheratchetbecomestheunidirectionalmovementoftheratchetbar.ARatchetbarBRatchetwheelCGearDRack第8題Thegenevamechanismconsistsof________.ARatchetwheelBGenevawheelCDrivingcrankslidesDFrame正確答案：BCD第9題Fortheincompletegearmechanism,thecontinuousrotationofthedrivingwheelistransformedintothe________motionofthedrivenwheel.A

sameBintermittentCsimilarDadjacent第10題Chaindrivecanbeemployedintheapplicationsofsmallcenterdistance;moreover,itrequireshighermanufacturingandinstallationaccuracy.(

)SchoolassignmentofChapter4第1題Thebladeofbulldozerscanbedividedintostraight(S-blade)anduniversal(U-blade)ones.()第2題Bulldozerscanbeclassifiedinto____andthecrawlerbulldozeraccordingtotheirwayofwalking.3正確答案：:thewheeldozer第3題Whichofthefollowingisnottheworkingcharacteristicsoffloatingscreed?

()AincreasethesmoothnessofthesurfacelayerBconvenientoperationCSmoothsubgradeundulationDunchangedworkinginclinationofsubgrade

第4題Theoperationalmodesofroadgraderscanbedividedinto(

).A

leveling

surfacesB

extendingthebladetoeithersideChighbank-cuttingoperationsDpositioningthebladetoperpendiculartothedirectionoftravel正確答案：DCBA第5題The(

)distributeshighpressureoilemittedfromthehydraulicpump.Thusdifferentdeviceshavetheirrolesplayedsimultaneously.AengineBvalveChydraulicpumpDsafetyvalve第6題Withitsmeritsoflightweight,fastspeed,

goodmaneuverabilityandhighefficiency,acrawler

loadercausesnodamagetoroad.(

)第7題Pile-drivingmachineryis

employed

todriveprefabricatedconcreteorsteelpilesintothedesignatedstratum,

laying

apilefoundationonunstablesoil.(

)第8題Ascrew

piledriverconsistsof(

AB

).ApileframeBdrillingdeviceCundercarriageDwindinghoistingtool正確答案：AB第9題Thehydraulicpumpconnectswithengineflywheelviacoupling.Thus,thekineticenergyoutputbytheflywheelisconvertedinto____energy.正確答案：:hydraulic第10題Themoredrivingwheelsaroadgraderhas,thegreatertractivepower

willitachieve.(

)SchoolassignmentofChapter5第1題Thereareadiversekindsofbridgecranes,whichcanbesortedaccordingtotheirhoistingtools,including(),jawgrabandelectromagneticchuck.Adouble-screwboltBscrewCliftinghookDnut第2題Accordingtotheirhoistingtools,bridgecranesaredividedintothreetypes,including().AscrewbridgecraneBhookbridgecraneCgrabbridgecraneDelectromagneticbridgecrane正確答案：BCD第3題Thebridgestructuredividescranesintosingle-girderand____

ones.正確答案：:doublegirder第4題Amongthedrillbitsusedinrockdrills,thecross-shapedbithastheadvantagesoffastspeedandsatisfactoryboredhole.However,thecomplicatedmanufacturingandgrindingconsumealotofmaterials.(

)

第5題Theratedcapacityatminimumradiusisappliedtorepresenttheliftingcapacityofcranes.(

)第6題Atpresent,thereisnomanufacturerofverticalmillingplanerinChina.()第7題Sincethe1980s