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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

penetration.Homework5第1題Themainfunctionoftheattenuatoristoadjustthemagni