Mechanical Engineering Practice 金工實習智慧樹知到期末考試答案2024年

MechanicalEngineeringPractice金工實習智慧樹知到期末考試答案2024年MechanicalEngineeringPractice金工實習Whichofthefollowinggatescanbeconsideredasanothervariantoftheedgegate,inwhichthewidthofthefangateatthemoldingexceedsthediameteroftherunner?()

A:tabgateB:pin-pointgateC:spruegateD:fangate答案:fangateThenballoonandbamboodragonflyareaircrafts?

A:錯誤B:正確答案:錯誤Theupperdeviationofasizemustbegreaterthanthelowerdeviation.

A:錯誤B:正確答案:正確Theprimaryfunctionoftheinjectionmoldfeedsystemistoconveythepolymermeltfromthenozzleofthemoldingmachinetothemoldcavities.

A:正確B:錯誤答案:正確Reverseengineeringequipment(e.g.,laserscanning)canalsobeusedtocreatearepresentationofAMpart.

A:正確B:錯誤答案:正確Inclearancefit,theactualsizeoftheholeisalwaysgreaterthanorequaltotheactualsizeoftheshaft.

A:正確B:錯誤答案:正確Thehigherthegeometriccomplexity,thegreatertheadvantageAMhasoverCNC.

A:錯誤B:正確答案:正確Thedivisionvalueofthecommonlyusedmicrometeris0.01mm.

A:錯誤B:正確答案:正確Thesurfaceroughnesssymbolindicatestheprocessedsurfaceobtainedbythenon-removalmethod.

A:錯誤B:正確答案:錯誤Theprimarypurposeofthepartingplaneistotightlysealthecavityofthemoldandpreventmeltleakage.

A:正確B:錯誤答案:正確Ininjectionmold,thecoreinsertretainerplateisalsocalledBplate.

A:對B:錯答案:對Averniercaliperisaprecisionmeasuringtoolbymeasuringclaw,andusesaVernierreading.

A:錯誤B:正確答案:錯誤Thecoolingtimeisdefinedastheamountoftimerequiredafterthemoldisfilledforplastictobecomesufficientlyrigidtoeject.

A:正確B:錯誤答案:正確ThequadrotororquadcopterisauniquetypeofUnmannedAerialVehicle(UAV)whichhasVerticalTakeOffandLanding(VTOL)ability.Ithasfourinputs(roll,pitch,yawandthrottle)andsixoutputs.

A:正確B:錯誤答案:正確Therougherthesurfaceofthepart,thebetterthewearresistance.

A:錯誤B:正確答案:錯誤Automaticprogrammingisefficientandcanmeetallrequirements.

A:錯誤B:正確答案:錯誤Fineturningprocessingisaprocessaftertheroughturning.

A:錯誤B:正確答案:正確Ininjectionmold,acoreisusuallyfoundatthecenterofthemold.

A:錯誤B:正確答案:錯誤Aftertheplastichassolidified,theinjectionmoldisopenedatthepartingplane.

A:錯誤B:正確答案:正確Thefundamentalprincipleofhumanizeddesignisthathumanshouldadapttotechnology,notthattechnologyshouldadapttohuman.

A:正確B:錯誤答案:錯誤Whenselectingthereferencesystem,thebaseholesystemisgenerallypreferred.

A:錯誤B:正確答案:正確Castironincludesgraycastiron,whitecastironandnodularcastiron.

A:錯誤B:正確答案:正確Programsgeneratedbyadedicatedpost-processorcanbeprocesseddirectlywithoutprogramdebugging.

A:錯誤B:正確答案:正確AMtakesfulladvantageofmanyoftheimportantfeaturesofcomputertechnology,bothdirectly(intheAMmachinesthemselves)andindirectly(withinthesupportingtechnology).

A:錯誤B:正確答案:正確Hot-airballoonsisakindofspacecraftsflyinspacewithoutoxygen.

A:正確B:錯誤答案:正確Measuringtheroundnesserrorcanbeusedinthreepointmethod.

A:正確B:錯誤答案:正確Thesymbol//indicates（）inthegeometrictolerance.

A:SlopeB:FlatnessC:Parallelism答案:AI參考:正確選項是【B:Flatness】。在幾何公差中，//符號通常表示平面度公差。'Verniercalipersaresuitablefor（）sizemeasurementandinspection.

A:HighaccuracyB:LowaccuracyC:Mediumaccuracy答案:AI參考:單選題]**C:Mediumaccuracy**\n\nVerniercalipers屬于通用測量工具，主要用于中等精度的測量和檢查。低精度和高度精度工具主要用于特定的測量應(yīng)用，如精密微小尺寸的測量等。所以，根據(jù)題目中的選項，最適合Vernier卡鉗的是中等精度。'Whatrelationshipsarestudiedinmaterialsscience?()

A:processingB:performanceC:structure/compositionD:properties答案:AI參考:正確選項是【C:structure/composition】。\n\n在材料科學中，研究的主要關(guān)系包括結(jié)構(gòu)/組成、性能、性質(zhì)等。結(jié)構(gòu)/組成是指材料中各組成部分的相對位置和數(shù)量關(guān)系，是材料的基本屬性之一，對材料的性能和性質(zhì)有重要影響。因此，選項C是正確答案。而選項A、B、D雖然也是材料科學中需要考慮的因素，但不是最主要的關(guān)系。'Whichkindofvehicleshavetheabilitytotakeoffwithoutarun-upandlandwithoutarun？

A:quadrotorsB:AirplanesC:helicopters答案:AI參考:正確選項是【A:quadrotors】。\n\n四旋翼無人機是一種能夠垂直起降（無需滑跑）的飛行器，因此選項A正確。而選項B和C的飛機和直升機通常需要一段跑道才能起飛和著陸。因此，這兩個選項不符合題目要求。'Objectivesinmoldcoolingsystemdesigninclude().

A:facilitatemoldusageB:minimizevolumeandcomplexityC:minimizeheattransferratesD:minimizemoldcost答案:AI參考:正確選項是【B:minimizevolumeandcomplexity】\n\n在注塑模具冷卻系統(tǒng)設(shè)計中，目標包括最小化體積和復(fù)雜性，以優(yōu)化模具的使用壽命和生產(chǎn)效率。其他選項如促進模具使用、減少熱傳遞速率和降低模具成本，并不是冷卻系統(tǒng)設(shè)計的核心目標。因此，選項B是正確的答案。'Inaninjectionmold,whichplatesmustbenon-standardparts?()

A:AplateB:thetopclampplateC:asupportplateD:Bplate答案:AI參考:正確選項是【B:thetopclampplate】。\n\n在注塑模具中，頂桿板是非標準件，需要特別定制。其他選項中的A板、C板和D板都是模具的標準件，可以在市場上購買到。因此，正確答案是B選項：thetopclampplate。'Whatarethestagesinmostinjectionmoldingprocesses?()

A:packingB:moldresettingC:injectionD:plasticationE:cooling答案:AI參考:選項A，B，C和E都是注射成型過程的不同階段。其中，選項A“packing”指的是填充階段，這是注射成型過程中的第一個階段，在此階段，熔融塑料被注入到模具中。選項B“moldresetting”指的是模具重置，這是注射成型過程中的一個必要步驟，用于確保模具在生產(chǎn)過程中保持一致性和穩(wěn)定性。選項C“injection”指的是注射階段，這是注射成型過程中的核心階段，在此階段，塑料熔體被注入到模具中。選項E“cooling”指的是冷卻階段，這是注射成型過程中的最后一個階段，在此階段，塑料制品被冷卻以形成最終的形狀和結(jié)構(gòu)。因此，選項A、B、C和E都是注射成型過程的不同階段。而選項D“plastication”并不是一個常見的術(shù)語或階段，因此不是正確答案。因此，正確選項為A、B、C和E。'Whatarethestepanalysisprocessfortheanalysisanddesignofvents?()

A:Thewidth,length,andthicknessofeachventmustbespecified.B:Theairdisplacem