雨课堂学堂在线学堂云Ultrasonic Testing Technology(四川工程职业技术大学)单元测试考核答案

目录：ChapterI：PhysicalFundamentalsofUltrasonicTestingChapterII:UltrasonicTestingInstrumentsandEquipmentChapterIII:UltrasonicTestingProcessChapterIV：ApplicationofUltrasoundDetectionChapterV：PracticeofUltrasoundDetection第1题Mechanicalwavesaccomplishtheirenergytransferbycollidingadjacentparticles.（）第2题Longitudinalwavesofthesamefrequencyhaveagreaterwavelengthinwaterthaninsteel。（）第3题Whenotherconditionsarethesame,thegreatertheelasticmodulusofthemechanicalwavepropagationmedium,thesmallerthedensity,andthegreaterthepropagationspeed.()第4题Thehigherthefrequencyofultrasound,thefasteritwillspread.（）第5题Whentheratioofsoundpressurebetweentwobeamsofultrasoundis2,theirdecibeldifferenceis6dB(decibel).()第6题Thegreatertheacousticimpedanceofthematerial,thegreatertheattenuationoftheultrasonicpropagation.()第7题Theincidentsoundpressureisequaltothesumofthetransmittedsoundpressureandthereflectedsoundpressurewhentheplanewaveisincidentverticallyontheinterface.（）第8题Thediffusionattenuationofultrasoundisrelatedtothewavepattern,soundpath,propagationmedium,andgrainsize.（）第9题Whenultrasonicwavesareobliquelyincidentontheinterfaceofdifferentmedia,wavemodeconversionoccurs.（）第10题Whenultrasonicwavesareverticallyincident,thesmallertheacousticimpedancedifferencebetweenthemediaonbothsidesoftheinterface,thelowertheacousticpressurereciprocatingtransmittance.（）第11题Whichofthefollowingstatementsaboutharmonicvibrationisincorrect。（）AHarmonicvibrationisthecircularmotionofaparticleatauniformspeed.BAnycomplexvibrationcanbeconsideredasthesynthesisofmultipleharmonicvibrations。CInharmonicvibration,theforceexertedontheparticleatthemaximumdisplacementismaximum,andthevelocityiszero。DInharmonicvibration,thevelocityoftheparticleattheequilibriumpositionislargeandtheforceiszero。第12题Ultrasoundisanelasticmechanicalwavewhosefrequencyexceedsthehumanear'shearing,anditsfrequencyrangeisapproximately:（）AAbove20000Hz。B1～10MHz。CAbove200Hz。D0.25～15MHz。第13题Inthesamesolidmaterial,therelationshipbetweenlongitudinalwavesoundvelocityCL,transversewavesoundvelocityCS,andsurfacewavesoundvelocityCRis:（）ACR>CS>CL.BCS>CL>CR.CCL>CS>CR.DNoneoftheaboveistrue.第14题Inthefollowingdifferenttypesofultrasound,whichwave'spropagationspeedvarieswithfrequency。（）Asurfacewave.Bplatewave.Cdensitywave.Dshearwave.第15题Thewavewhoseparticlevibrationdirectionisperpendiculartothepropagationdirectionofthewaveis:（）Alongitudinalwave.Bshearwave.Csurfacewave.DLambo.第16题Whichofthefollowingultrasonicwaveshastheshortestwavelength。（）A2MHzlongitudinalwavepropagatinginwater.B2.5MHzshearwavespropagatinginsteel.C5MHzlongitudinalwavespropagatinginsteel.D2MHzsurfacewavespropagatinginsteel.第17题Whenultrasonicwavespropagateinanelasticmedium,thereis().AParticlevibrationandparticlemovement.BParticlevibrationandvibrationtransmission.CParticlevibrationandenergypropagation.DBandC.第18题Theproductofsoundvelocityanddensityofamaterialiscalledacousticimpedance,whichaffectsultrasound（）.AMaterialattenuationduringpropagation.BReflectionandtransmissionattheinterfacewhentravelingfromonemediumtoanother.CScatteringduringpropagation.DDiffusionanglesize.第19题Whenultrasoniclongitudinalwavesareverticallyprojectedintowaterfromsteel,theiracousticpressuretransmittanceislessthan0,whichmeans:（）.ATransmittedenergyisgreaterthanincidentenergy.BThevibrationphaseofthereflectedultrasonicwaveis180ºfromtheincidentacousticwave.CUltrasonicwavescannotpenetrateintowater.DNoneoftheaboveistrue.第20题Thefirstcriticalangleis:（）.ATheincidentangleofthetransversewavewhentherefractedlongitudinalwaveisequalto90º.BTheincidentangleofthelongitudinalwavewhentherefractedtransversewaveisequalto90º.CTheincidentangleofthelongitudinalwavewhentherefractedlongitudinalwaveisequalto90º.DRefractionangleofincidentlongitudinalwaveapproaching90º.第1题Inultrasonictesting,thepositivepiezoelectriceffectisusedtoemitultrasonicwaves,andthereversepiezoelectriceffectisusedtoreceiveultrasonicwaves.()第2题Againof100dBisasignalstrengthamplificationof100times.()第3题Comparedwithordinaryprobes,focusingprobeshavehigherresolution.()第4题Doublecrystalprobescanonlybeusedforlongitudinalwavedetection.()第5题Thetransmittercircuitoftheflawdetectorgenerateselectricalimpulsesfromhundredstothousandsofvoltstoexcitetheprobewafervibration()第6题Differentpiezoelectriccrystalmaterialshavedifferentsoundvelocities,sodifferentpiezoelectricmaterialshavedifferentfrequencyconstants.()第7题Whenthesurfaceofworkpieceisrough,hardprotectivefilmshouldbeusedtopreventprobewearandprotectwafer.()第8题TheKvalueoftheinclinedprobewillincreasewithmorewearonthefrontoftheinclinedprobe.()第9题Doublecrystalprobesaremainlyusedfordetectingnearsurfacedefects.（）第10题Whenanangleprobewitharefractiveangleof60ºisusedtodetectaluminuminsteel,itsrefractiveanglewillbecomelarger.（）第11题Whenthe"inhibit"knobontheA-typeultrasonicflawdetectoristurnedon,itwillaffect(

)oftheinstrument.AVerticallinearity.BHorizontallinearity.CPulserepetitionfrequency.DDelay.第12题Quantitativeevaluationofdefectsusingareferenceblockshowsthattheburieddepthofdefectsintheworkpieceisknowntobe22mm,andtheacceptancestandardisΦ1.2mmflatbottomholeequivalent,then()fromthesamematerialreferenceblockshouldbeselectedforcomparison.A20/Φ3mm.B25/Φ2mm.C25/Φ1.2mm.D20/Φ1.2mm.第13题Iftheinstrumentusesasawtoothscanninggenerator,thedegreetowhichthesawtoothwaveformisscanneddeterminesthequalityofscanning().ADynamicrange.BVerticallinearityCHorizontallinearity.DRepetitionfrequency.第14题Thefunctionofthetransmittingcircuitpartoftheflawdetectoris().AEmissionofultrasonicpulses.BAmplificationoftheemissionpulses.CEmissionofelectricalpulses.DGenerationofsquarewaves.第15题Theabilitytodistinguishtwoadjacentdefectsontheoscilloscopescreeniscalled(

).AResolution.BRepetitionfrequency.CHorizontallinearity.DVerticallinearity.第16题Theamplitudeoftheamplifiedsignalisindirectproportiontothereflectionareaofthedefect,andthenonsaturatedamplificationregionoftheamplifieriscalled(

).ASensitivityrange.BLinearrange.CSelectiverange.DResolutionrange.第17题Inanultrasonicdetector,thecircuitunitthatgenerateshigh-voltageelectricalpulsestoexcitetheprobeiscalled(

).AAmplifier.BReceiver.CPulseGenerator.DSynchronizer.第18题Aninstrumentwithgoodverticallinearityshouldattenuate(

)whentheamplitudeonthefluorescentscreendecreasesfrom80%to5%.A6dB.B18dB.C32dB.D24dB.第19题Inanultrasonicdetector,thepulsedisplaymethodofdisplayingtheultrasonicsignalstrengthonthelongitudinalaxisofthefluorescentscreenanddisplayingtheultrasonicpropagationtimeorthedepthofthereflectoronthehorizontalaxisiscalled(

).AContinuouswavedisplay.BAscandisplay.CBscandisplay.DCscandisplay.第20题Theparameterscharacterizingtheemissionperformanceofpiezoelectriccrystalsare（）.APiezoelectricvoltageconstantg33.BElectromechanicalcouplingcoefficientK.CPiezoelectricstrainconstantd33.DAlloftheabove.Homework3第1题Inordertoimprovetheresolution,theemissionintensityoftheinstrumentshouldbeadjustedashighaspossiblewhentheflawdetectionsensitivityrequirementsaremet.()第2题Thedefectsizedeterminedbytheequivalentmethodisgenerallylargerthantheactualsizeofthedefect.（）第3题Onlywhenthesizeofthedefectintheworkpieceineachdirectionisgreaterthantheacousticbeamcross-section,itisnecessarytousethelengthmeasurementmethodtodeterminethedefectlength.（）第4题Inultrasonictesting,thedefectisratedasΦ2mmthrough-holeequivalent,whichmeansthatthereflectedechoofthedefectiscomparabletothereflectedechosizeoftheΦ2mmthrough-holeunderthesamebeamsectioninthetestblock.（）第5题Whenultrasonicwavesareincidentobliquelyonthedefectsurface,theheightofthereflectedwaveofthedefectincreaseswiththeincreaseoftheincidenceangle.（）第6题Inultrasonictesting,thereasonforthegenerationofphantomwavesisthatthepulserepetitionfrequencyistoohighinmaterialswithsmallattenuation.（）第7题Whenmeasuringtheindicatedlengthofadefectusingtheabsolutesensitivitymethod,thelengthmeasurementsensitivityishighandthemeasureddefectlengthislarge.（）第8题Inultrasonictesting,thenatureofdefectscanalreadybeaccuratelydeterminedbasedonthestaticwaveformofthedefectecho.（）第9题Thehighertheflawdetectionsensitivity,thesmallerthedetectionblindarea,andthelowertheresolution.（）第10题Inordertomeettherequirementsofhighnear-surfaceresolution,amoresuitablemethodistoselectacombineddualcrystalprobe.（）第11题Whenthesoundwaveisincidentverticallytothedefectwithroughsurface,theeffectofthesurfaceroughnessofthedefectontheheightofthedefectreflectedwaveis(

).AThereflectedwaveheightincreaseswiththeincreaseofroughness.BNoeffect.CThereflectedwaveheightdecreaseswiththeincreaseofroughness.DBothaandbabovearepossible.第12题Wheninspectingsteelforgingswithathicknessgreaterthan400mm,ifthefrequencyofthelongitudinalwaveisreduced,itssoundvelocitywillbe(

).Aincrease.Bdecrease.Cunchanged.Dindefinite.第13题Resonantultrasonicinstrumentsaremainlyused().AHigh-frequencypulsedlongitudinalwave.BContinuouslongitudinalwave.CLow-frequencypulsedlongitudinalwave.DContinuousshearwave.第14题Useaninstrumentthathasbeencorrectlycalibratedwhenthebaselinehasbeencorrectlycorrectedtoprobethehorntestblock(V2testblock)ofR1=50mm,R2=25mm,sothattheobliqueprobeisalignedwiththeR1arc,ifthefirstechoontheultrasounddisplayislocatedatthehorizontalscale2grid,thesecondechowillappearin().A5grid.B9grid.C6grid.DNoneoftheaboveistrue.第15题Afterdetectingflawswithalongitudinalstraightprobeandfindingthemaximumechoofthedefect,thecenterpositionofthedefectis().ALocateddirectlybelowtheprobecenterinanycase.BLocatedatthelowerleftoftheprobecenter.CLocatedatthelowerrightoftheprobecenter.DItcannotbedeterminedthatitisdirectlybelowthecenteroftheprobe.第16题Inultrasonicinspection,whentheflawdetectionsurfaceisrough,itisadvisabletochoose().ALowerfrequencyprobe.BMoreviscouscouplant.CSoftprotectivefilmprobe.DAlloftheabove.第17题Theuseofhigherdetectionfrequencyduringflawdetectioncanbebeneficialto().ASmallerdefectsarefound.BDistinguishingadjacentdefects.CImprovingbeamdirectivity.DAlloftheabove.第18题Themagnitudeofthesoundenergyreflectedbythedefectdependson().ASizeofthedefect.BTypeofdefect.CShapeandorientationofthedefect.DAlloftheabove.第19题Themainconsiderationforultrasonicdetectionconditionsis().AOperatingfrequency.BProbeandinstrumentparameters.CCouplingconditionsandstatus.DDetectionsurface.EMaterialattenuation.FAlloftheabove.正确答案：F第20题Half-waveheight(6dB)methodlengthmeasurementisapplicableto(

).AFlatbottomhole.BLongbardefects.CLumpydefects.DRounddefects.Homework4第1题Theultrasonictestingofforgingsdoesnotuseobliqueprobesforflawdetection.(

).第2题Whenscanningthecircumferentialsurfaceoftheshaftforgingwithastraightprobe,ifthereisaswimmingsignal,itcanbesurethatthereisaradialdefect.（）第3题Insteelplateflawdetection,whenthereisbothabottomwaveandawoundwave,itindicatesthatthereisadefectinthesteelplatethatissmallerthanthediameterofthesoundfield.()第4题Thegridscanningmethodisoneofthebasicscanningmethodsfordetectingweldsusingmonoclinicprobeshearwaves.()第5题Thesurroundscanningmethodisoneofthebasicscanningmethodsfordetectingweldsusingmonoclinicprobeshearwaves.()第6题Whenultrasonictestingofcompositepanels,ifthecompositeinterfaceislayered,itsinterfaceechowillbereduced.()第7题Ifthereisnobottomwaveintheflawdetectionofthesteelplate,itmeansthatthereisnodefectinthesteelplate.()第8题Thetandemdoubleprobemethodisessentiallyaone-pitchpenetrationmethod.()第9题Theobliqueprobeusedinweldflawdetection,whentherearofthebottomsurfaceofthewedgeisworn,itsrefractiveanglewillbecomesmaller.()第10题Pureshearwaveflawdetectionofpipes,toensurethatthesoundbeamcandetecttheinnerwallofthetube,theconditionisthattheratioofthethicknessofthepipewalltotheouterdiameterofthepipeisgreaterthan0.2.()第11题Inforgingflawdetection,whena"forest-like(cluster)wave"appearsonthefluorescentscreen,itisdueto(

).ATherearesmallanddensedefectsintheworkpiece.BTherearelocalgraincoarseareasintheworkpiecematerial.CThereareloosedefectsintheworkpiece.DAlloftheabovearepossible.第12题Whenlong-shaftforgingsareprobedaxiallyfromtheendface,thenon-defectiveechoesthatarepronetooccurare(

).Atriangularreflectedwave.B61°reflectedwave.Ccontourecho.Dlatewave.第13题Inthewaterimmersionofthesteelplate,iftheangleofincidenceis33°(sin33°=0.545),itwillbegeneratedintheplate(

).Alongitudinalwave.Btransversewave.Cbothlongitudinalwaveandshearwavehaveboth.Dnolongitudinalwaveandnoshearwave.第14题Inthepipeautomaticflawdetectionequipment,theformofrelativemovementoftheprobeandthepipeis().ATheproberotates,thepipeadvancesinastraightline.BTheprobeisstationary,thepipespiralsforward.CThepiperotates,andtheprobemovesinastraightline.DAlloftheabove.第15题Inordertodetectdefectsintheweldatdifferentanglestothesurface,themethodthatshouldbetakenis().AIncreasethedetectionfrequency.BUseavarietyofangleprobestodetect.CRepairtheflawdetectionsurface.DTheabovecanbeused.第16题Intheultrasonicinspectionofnarrowgapweldswithaplatethicknessofmorethan100mm,themosteffectivescanningmethodis(

)todetecttheunfusededgedefect.AObliqueparallelscanning.BTandemscanning.CDualelementobliqueprobefrontandrearscanning.DCrossscanning.第17题Whentheweldwiththereinforcementlayerisscannedobliquelyparalleltodetectthetransversedefectsoftheweld,itshould().Akeepthesensitivityunchanged.Bappropriatelyincreasethesensitivity.Cincreasethedetectionoflargerefractiveangleprobe.Dabovebandc.第18题Knownthickness22mmsteelplatebuttweldwidth18mm,weldreinforcementheight1.5mm,V-shapedgroove,using2.5MHz10x12mmobliqueprobesingle-sidedsingle-sideddetection,itsleadingedgelength(incidencepointtoprobefrontsurfacedistance)11.5mm,shouldchoosetheproberefractiveangleminimum(

).A45°.B60°.C70°.D43°.第19题Whenthelongitudinalweldofthecylindricalworkpieceisdetectedwithshearwaves,thespanwillbe().Aincrease.Bdecrease.Cinvariant.Dincreaseordecreasebyouterorinnercircumferentialsurfaceprobing.第20题Thickweldsareeasytomisswithmonoclinicprobes().ALinearslaginclusion.BLargeandflatdefectsperpendiculartothedetectionsurface.CDensepores.Dincomplete

penetration.Homework5第1题Themainfunctionoftheattenuatoristoadjustthemagni