Mechanical Engineering Practice 金工实习智慧树知到期末考试答案2024年

MechanicalEngineeringPractice金工实习智慧树知到期末考试答案2024年MechanicalEngineeringPractice金工实习Whichofthefollowinggatescanbeconsideredasanothervariantoftheedgegate,inwhichthewidthofthefangateatthemoldingexceedsthediameteroftherunner?()

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

A:错误B:正确答案:错误Theupperdeviationofasizemustbegreaterthanthelowerdeviation.

A:错误B:正确答案:正确Theprimaryfunctionoftheinjectionmoldfeedsystemistoconveythepolymermeltfromthenozzleofthemoldingmachinetothemoldcavities.

A:正确B:错误答案:正确Reverseengineeringequipment(e.g.,laserscanning)canalsobeusedtocreatearepresentationofAMpart.

A:正确B:错误答案:正确Inclearancefit,theactualsizeoftheholeisalwaysgreaterthanorequaltotheactualsizeoftheshaft.

A:正确B:错误答案:正确Thehigherthegeometriccomplexity,thegreatertheadvantageAMhasoverCNC.

A:错误B:正确答案:正确Thedivisionvalueofthecommonlyusedmicrometeris0.01mm.

A:错误B:正确答案:正确Thesurfaceroughnesssymbolindicatestheprocessedsurfaceobtainedbythenon-removalmethod.

A:错误B:正确答案:错误Theprimarypurposeofthepartingplaneistotightlysealthecavityofthemoldandpreventmeltleakage.

A:正确B:错误答案:正确Ininjectionmold,thecoreinsertretainerplateisalsocalledBplate.

A:对B:错答案:对Averniercaliperisaprecisionmeasuringtoolbymeasuringclaw,andusesaVernierreading.

A:错误B:正确答案:错误Thecoolingtimeisdefinedastheamountoftimerequiredafterthemoldisfilledforplastictobecomesufficientlyrigidtoeject.

A:正确B:错误答案:正确ThequadrotororquadcopterisauniquetypeofUnmannedAerialVehicle(UAV)whichhasVerticalTakeOffandLanding(VTOL)ability.Ithasfourinputs(roll,pitch,yawandthrottle)andsixoutputs.

A:正确B:错误答案:正确Therougherthesurfaceofthepart,thebetterthewearresistance.

A:错误B:正确答案:错误Automaticprogrammingisefficientandcanmeetallrequirements.

A:错误B:正确答案:错误Fineturningprocessingisaprocessaftertheroughturning.

A:错误B:正确答案:正确Ininjectionmold,acoreisusuallyfoundatthecenterofthemold.

A:错误B:正确答案:错误Aftertheplastichassolidified,theinjectionmoldisopenedatthepartingplane.

A:错误B:正确答案:正确Thefundamentalprincipleofhumanizeddesignisthathumanshouldadapttotechnology,notthattechnologyshouldadapttohuman.

A:正确B:错误答案:错误Whenselectingthereferencesystem,thebaseholesystemisgenerallypreferred.

A:错误B:正确答案:正确Castironincludesgraycastiron,whitecastironandnodularcastiron.

A:错误B:正确答案:正确Programsgeneratedbyadedicatedpost-processorcanbeprocesseddirectlywithoutprogramdebugging.

A:错误B:正确答案:正确AMtakesfulladvantageofmanyoftheimportantfeaturesofcomputertechnology,bothdirectly(intheAMmachinesthemselves)andindirectly(withinthesupportingtechnology).

A:错误B:正确答案:正确Hot-airballoonsisakindofspacecraftsflyinspacewithoutoxygen.

A:正确B:错误答案:正确Measuringtheroundnesserrorcanbeusedinthreepointmethod.

A:正确B:错误答案:正确Thesymbol//indicates（）inthegeometrictolerance.

A:SlopeB:FlatnessC:Parallelism答案:AI参考:正确选项是【B:Flatness】。在几何公差中，//符号通常表示平面度公差。'Verniercalipersaresuitablefor（）sizemeasurementandinspection.

A:HighaccuracyB:LowaccuracyC:Mediumaccuracy答案:AI参考:单选题]**C:Mediumaccuracy**\n\nVerniercalipers属于通用测量工具，主要用于中等精度的测量和检查。低精度和高度精度工具主要用于特定的测量应用，如精密微小尺寸的测量等。所以，根据题目中的选项，最适合Vernier卡钳的是中等精度。'Whatrelationshipsarestudiedinmaterialsscience?()

A:processingB:performanceC:structure/compositionD:properties答案:AI参考:正确选项是【C:structure/composition】。\n\n在材料科学中，研究的主要关系包括结构/组成、性能、性质等。结构/组成是指材料中各组成部分的相对位置和数量关系，是材料的基本属性之一，对材料的性能和性质有重要影响。因此，选项C是正确答案。而选项A、B、D虽然也是材料科学中需要考虑的因素，但不是最主要的关系。'Whichkindofvehicleshavetheabilitytotakeoffwithoutarun-upandlandwithoutarun？

A:quadrotorsB:AirplanesC:helicopters答案:AI参考:正确选项是【A:quadrotors】。\n\n四旋翼无人机是一种能够垂直起降（无需滑跑）的飞行器，因此选项A正确。而选项B和C的飞机和直升机通常需要一段跑道才能起飞和着陆。因此，这两个选项不符合题目要求。'Objectivesinmoldcoolingsystemdesigninclude().

A:facilitatemoldusageB:minimizevolumeandcomplexityC:minimizeheattransferratesD:minimizemoldcost答案:AI参考:正确选项是【B:minimizevolumeandcomplexity】\n\n在注塑模具冷却系统设计中，目标包括最小化体积和复杂性，以优化模具的使用寿命和生产效率。其他选项如促进模具使用、减少热传递速率和降低模具成本，并不是冷却系统设计的核心目标。因此，选项B是正确的答案。'Inaninjectionmold,whichplatesmustbenon-standardparts?()

A:AplateB:thetopclampplateC:asupportplateD:Bplate答案:AI参考:正确选项是【B:thetopclampplate】。\n\n在注塑模具中，顶杆板是非标准件，需要特别定制。其他选项中的A板、C板和D板都是模具的标准件，可以在市场上购买到。因此，正确答案是B选项：thetopclampplate。'Whatarethestagesinmostinjectionmoldingprocesses?()

A:packingB:moldresettingC:injectionD:plasticationE:cooling答案:AI参考:选项A，B，C和E都是注射成型过程的不同阶段。其中，选项A“packing”指的是填充阶段，这是注射成型过程中的第一个阶段，在此阶段，熔融塑料被注入到模具中。选项B“moldresetting”指的是模具重置，这是注射成型过程中的一个必要步骤，用于确保模具在生产过程中保持一致性和稳定性。选项C“injection”指的是注射阶段，这是注射成型过程中的核心阶段，在此阶段，塑料熔体被注入到模具中。选项E“cooling”指的是冷却阶段，这是注射成型过程中的最后一个阶段，在此阶段，塑料制品被冷却以形成最终的形状和结构。因此，选项A、B、C和E都是注射成型过程的不同阶段。而选项D“plastication”并不是一个常见的术语或阶段，因此不是正确答案。因此，正确选项为A、B、C和E。'Whatarethestepanalysisprocessfortheanalysisanddesignofvents?()

A:Thewidth,length,andthicknessofeachventmustbespecified.B:Theairdisplacem