材料导论范文

材料导论范文材料导论范文 1 What is the maximumnumber of electrons that an Mshell maycontain A 18B 32C 82 The nucleusof anatom containsProtons ElectronsNeutrons All of the above Both A and C How many atoms or molecules are there in a mole of a substance 6 023E234 What type s of electronsubshell s does anL shellcontain a pf ss andf s and pMatch theelectron structurebelow with the elementtype itrepresents 1s22s22p63s23p63d104s1Inert gasHalogen Alkali metal Alkaline earth metalTransition metal6 What is the predominanttype ofbonding fortitanium Ti Ionic Hydrogen Covalent van der WaalsMetalli7 Of thoseelements in the listsituated belowthe periodictable select theone that is oneelectron shortof havingits outershell ofelectrons pletelyfilled I NS SrAr c8 Which of the followingmaterials mayform crystallinesolids Polymers Metals Ceramics All of the above9 Which of the followingare the most moncoordination numbersfor ceramicmaterials 23and64and124 6and810 Which crystalsystem s listed belowhas have the followingrelationship for the unitcell edgelengths a b c Cubic Hexagonal Triclinic Monoclinic RhombohedraOrthorhombic TetragonalBoth C and E11 Which crystalsystem s listed belowhas have the followinginteraxial anglerelationship 90 CubicHexagonalTriclinicMonoc linicRhombohedral OrthorhombicBoth Aand D12 把把a b c d四块金属片浸入稀硫酸中 用若导线两两相连 组成原电池 若a b相连时 a为负极 c d相连时 电流由d到到c a c相连时 c极上产生大量气泡 b d相连时 b上有大量气泡产生 则四种 金属的活动性顺序由强到弱的为泡产生 则四种金属的活动性顺序 由强到弱的为 A a b c d B a c d b C c a b d试题内容The nucleusof anatom contains A Protons B Electrons C Neutrons D Both Aand CE All of the above二选择题试题内容What type s ofelectronsubshell s does anL shellcontain A a pf sB s andf C sandp D All of the above试题内容What is the maximumnumber ofelectrons thatan Mshell maycontain A 18B 32C 8D 2试题内容Match theelectron structurebelow withthe elementtype itrepresents 1s22s22p63s23p63d104s1A Inert gasB Halogen C AlkalimetalD Alkalineearthmetal E Transition metal试题内容Which of the followingmaterials mayform crystallinesolids A Polymers B Metals C Ceramics D All of the aboveE None of the above试题内容DWhich of the followingare themost moncoordination numbersfor ceramicmaterials A 2and3B 6and12C 6 8and12D 4 6and8试题内容 Which crystalsystem s listed belowhas have the followingrelationship for the unitcell edgelengths a b c A Cubic B Hexagonal C Triclinic D Monoclinic E Rhombohedral F Orthorhombic试题内容Which type s of bondsare foundbetween atomswithin hydrocarbonmolecules A Ionic bondsB Hydrogen bondsC Covalent bondsD van derWaals bondsE Metallic bonds试题内容Which of the followingform work polymers A Rubber polyethylene and phenol formaldehyde B Epoxy andphenol formaldehyde C Polystyrene and nylon D Polyethylene polystyrene and nylon试题内容How dothe densitiesof crystallineand amorphous polymers of the samematerial andhaving identicalmolecular weightspare A Density ofcrystalline polymerDensity of amorphouspolymer试题内容What isthe predominanttype ofbonding fortitanium Ti A Ionic B HydrogenC Covalent D vanderWaals E Metallic试题内容Which crystalsystem s listed belowhas have the followinginteraxial anglerelationship 90 A Cubic B Hexagonal C Triclinic D Monoclinic E Rhombohedral F Orthorhombic试题内容What isthe nameof thehydrocarbon groupshown below RCHO A ether B aromatic hydrocarbonC alcohol D aldehyde试题内容What isthe nameof thehydrocarbon groupshown below RCHO A ether B aromatic hydrocarbonC alcohol D aldehyde试题内容Which of the characteristicslisted belowdistinguishes thestainless steelsfrom othersteel types A They are more ductile B They arestronger C They aremore wearresistant D They aremore corrosionresistant 试题内容Which fourelements in the listbelow are alloyed with high carbon steelsto improvetheir hardnesses A Silicon Tungsten Nickel Molybdenum B Tungsten Molybdenum Chromium Vanadium C Nickel Molybdenum Chromium Vanadiu D Silicon Copper Nickel Vanadium试题内容For the following two polymers dothe following indicate if it isnot possibleto determineif onepolymer ismore likelyto crystallizethan the other On theother hand ifit is possibleto makesuch adetermination thenindicate which of thetwo ismore likelyto crystallize Linear polyethylene Lightly branchedisotactic polypropyleneA Lightly branchedisotactic polypropyleneB Linear polyethyleneC Not possible试题内容Which of the followingmaterials mayform crystallinesolids A Polymers B MetalsC Ceramics D All of the above试题内容Which typeof steelcontains onlyresidual amountsof alloyingelements A Plain carbonsteel B Alloy steel试题内容Which of the followingmicroconstituents phases aremost monlyfound instainless steels A Ferrite Pearlite and Temperedmartensite B Ferrite Martensite and AusteniteC Pearlite Martensite and AusteniteD Pearlite Austenite and Temperedmartensite试题内容What isthe typicalcarbon concentrationrange formedium carbon steels A 0 05wt 1 00wt C B 0 10wt 0 50wt C C 0 25wt 0 65wt C D 0 25wt 1 00wt C试题内容Which of the followingstainless steeltypes may be magized A Ferritic martensitic and austeniticB Martensitic and austenitic C Ferritic andmartensitic D Ferritic andaustenitic试题内容Which of the followingmay ourduring anannealing heat treatment A Stresses may be relieved B Ductility mayincrease C Toughness mayincrease D A specificmicrostructure maybe producedE All of the above 试题内容The hardeningof portlandcement resultsfrom which ofthe following A a dryingprocess B a chemicalreaction involvinga poundother thanwater C a chemicalreaction involvingwater i e hydration 试题内容Which ofthe followingproperty binationsis requiredfor abrasiveceramics A High melting temperature high hardness and high ductility B High fracturetoughness high meltingtemperature and high hardness C High fracturetoughness highhardness and lowcoefficient ofthermal expansionD High meltingtemperature highductility and lowcoefficient ofthermal expansion试题内容As theporosity ofrefractory ceramicbricks increases A strength decreases chemical resistancedecreases and thermalinsulation increases B strength increases chemical resistanceincreases and thermalinsulation decreases C strength decreases chemical resistanceincreases and thermalinsulation decreases D strength increases chemical resistanceincreases and thermalinsulation increases 试题内容Which ofthe followingalloys is most suitablefor high temperature furnaceelements to be used in oxidizingenvironments A Titanium alloyB Platinum C Tool steelD Stainless steel试题内容Superalloys aremonly used in which ofthe following applications A Aircraft structuralponents B Jet enginesC Nuclear reactorsD B andC试题内容Which ofthe followingcast irontypes isstronger andmore ductile A Gray ironsB Nodular irons试题内容Which ofthe followingmicroconstituents phases is are most monlyfound in gray castirons A Graphite B Pearlite andMartensite C Graphite Pearlite and FerriteD Ferrite Austenite and Pearlite试题内容Hot workingtakes placeata temperature that is abovea metal sA meltingtemperatureB recrystallization temperatureC eutectoid temperatureD glass transitiontemperature试题内容For fiberapplications a polymershould be A highly crystallineB semicrystalline C noncrystalline试题内容Silica refractoryceramics areoften used for thecontainment ofslags that are richin A Silica B MgO C CaO D All ofthe above试题内容Which ofthe followingalloys is most suitablefor adrill bit A Titanium alloyB Aluminum C Tool steelD Platinum试题内容In whichofthe following environmentsdo nickeland itsalloys performextremely well A acidic B basic试题内容In whichofthe following groupsareallthe metalsrefractory metals A Niobium molybdenum iron and aluminumB Molybdenum tantalum and copperC Tungsten tantalum copper and titaniumD Niobium molybdenum tungsten and tantalum试题内容For whichofthe following reasonshave magnesiumalloys replacedengineered plasticswith parabledensities A Magnesium alloysare stiffer B Magnesium alloysaremorerecyclable C Magnesium alloysare cheaperto produce D All ofthe above 试题内容Which ofthe followingelements when alloyedwith copper results in an alloythat isprecipitation hardenable A Zinc B Gold C Beryllium D Tin试题内容Which ofthe threequenching mediaismost monly used for alloysteels A air B water C oil D vapor试题内容A normalizingheat treatmentis terminatedby coolingin A air outside a furnace B a furnace试题内容Normalizing aferrous alloycauses theaverage grainsize toA increase B decrease C no change试题内容For partsthat areto be used inmoderately stressedapplications what percentageofthepart s interiorshould bemartensite A 40 B 50 C 60 D 70 试题内容Carbon fiber reinforced positeshave whichofthe following properties A Relatively highstrengths B Relatively highstiffnesses C High servicetemperatures 200 C D All ofthe above试题内容Once thefibers failin afibrous posite catastrophic failureofthepiece takes place A true B false C not clear试题内容For partsthataretobe usedinmoderately stressedapplications what percentageofthepart s interiorshould bemartensite A 40 B 50 C 60 D 70 E 80 F 90 试题内容Which ofthe followingare thetwo primary constituents ofclays A Alumina Al2O3 and limestone CaCO3 B Limestone CaCO3 and cupricoxide CuO C Silica SiO2 and limestone CaCO3 D Alumina Al2O3 and silica SiO2 试题内容Which ofthe followingmaterials is are typically usedas stabilizer s in transformation toughened ceramic matrix posites A CeO B Y2O3 C Cr2O3 D ZrO2 E SiO2 F MgO试题内容Th e rate of heattransfer fromthe specimenduring aJominy end quench testis nearlyindependent ofposition A true B false C not clear试题内容Which ofthe threequenching mediaismostmonly usedfor alloysteels A air B water C oil试题内容There is a definitetemperature atwhich a liquid solidifiesto forma glassy or noncrystalline solid A true B false C not clear试题内容What isthe viscosityvalue correspondingto thestrain pointof glass A 10Pa s B 10 3Pa s C 4x10 6Pa s D 10 12Pa s E 3x10 13Pa s试题内容Glass rodsare fabricatedby whichofthe following techniques A Drawing B Pressing C Blowing试题内容During thermaltempering a glasspiece isheated toatemperature A Below theglass transitiontemperature B Above theglass transitiontemperature C Below thesoftening point D Above thesoftening point E BothAand D F Both BandC 试题内容Normalizing aferrous alloycauses theaverage grainsize toA increase B decrease C no change试题内容Which ofthe followinginfluences thehardenability of a steel A Its positionB Type ofquenching mediumC Character ofthe quenching medium D Size andshape ofthe specimen试题内容An elementwiththeelectron configuration1s22s22p63s23p6has howmany electrons A 18B 10C 31D 32试题内容Which ofthe followinginfluences thehardenability of a steel A Its positionB Type ofquenching mediumC Character ofthe quenching medium D Size andshape ofthe specimen试题内容A normalizingheattreatmentis terminatedby coolingin A air outside afurnace B afurnaceC water D oil试题内容Which ofthe followinginfluences thehardenability of a steel A Its positionB Type ofquenchingmediumC Character ofthe quenchingmedium D Size andshape ofthe specimen试题内容Which ofthe followinginfluences thehardenability ofa steel A Its positionB Type ofquenchingmediumC Character ofthe quenchingmedium D Size andshape ofthe specimen一选择题试题内容If the atomic radiusofa metal that has the face centered cubirystal structureis0 137nm calculate thevolume of its unitcell in nm 3 A0 0582nm 3B2 0nm 3C3 0nm 3D4 0nm 3试题内容For theface centered cubirystal structure How manyatoms areassociated witheach unitcell A4B12C16D18试题内容For theface centered cubirystal structure What istheatomicpacking factor A0 740B0 618C0 543D0 344试题内容In mostinstances one way to reducethe corrosionrate is to A increase thefluid temperature B decrease thefluid temperature 试题内容The number average molecular weight ofa poly styrene methyl methacrylate alternating copolymeris1 760 000g mol Determine theaverage numberof styrene 104 14g mol and methylmethacrylate 100 11g mol mer unitsper molecule A8617B12222C2333222D342222试题内容Name theterm usedfortheconfiguration ofa stereoisomerhaving Rgroups whosepositions alternatefrom oneside to theotherside alongthe backbonechain A atacticB isotacticC syndiotactic试题内容Given the following atomic weights what isthe merweight in g mol of poly vinyl chloride A62 5B70C72D45试题内容Which materialretains itsstrength betterat elevated temperatures A A dispersion strengthened positeB A precipitation hardened alloyC not clear试题内容As particlecontent isincreased how doesthe strengtha particle reinforced positechange A Strength increases B Strength decreases C not clear试题内容Which ofthefollowingis are posite s A Pearlitic steelB Wood C Bone D Concrete E Carbon fiber reinforced epoxyF All ofthe above试题内容Injection moldingmaybe usedforthe fabricationof whichtype s of polymers A Thermosetting B Thermoplastic C Both thermosettingand thermoplastic试题内容Amorphous thermoplasticsare formedabove theirA glass transitiontemperatures B softening pointsC flow temperatures试题内容Why areplasticizers addedto polymers A To improvetensile strengthB To improvepressive strengthC To improveflexibility D To improvethermal stabilityE To improvetoughness试题内容Which polymerizationtechnique isgenerally used to producecrosslinked andwork polymers A Addition polymerizationB Condensation polymerizationC not clear试题内容If aceramic pieceis desiredthat isdense and in addition is toexperience verylittle orno grain growth duringits processing whichofthefollowingpowder pressingtechniques shouldbeused A Uniaxial pressing followed byfiring B Isostatic pressing followed byfiring C Hot pressing 试题内容For powder pressing ofceramic pieces degree ofpaction ismaximized when a mixtureof largeand smallparticles is used A False B True C not clear试题内容For aclay based ceramicbody if the rate ofevaporation isgreater than the rate of waterdiffusion throughthe body the surfacewill drymore rapidlythan theinterior A True B False C not clear试题内容How manyatoms ormolecules arethere ina moleofasubstance A6E41B6 023E23C3E42D1E10试题内容Which materialretains itsstrength betterat elevatedtemperatures A A dispersion strengthened positeB A precipitation hardened alloyC not clear试题内容As particlecontent isincreased how doesthe strengtha particle reinforced positechange A Strength increases B Strength decreases C not clear试题内容Which ofthefollowingis are posite s A Pearlitic steelB Wood C Bone D Concrete E Carbon fiber reinforced epoxyF All ofthe above试题内容Injection moldingmaybeusedforthe fabricationof whichtype s of polymers A Thermosetting B Thermoplastic C Both thermosettingand thermoplastic试题内容Amorphous thermoplasticsare formedabove theirA glass transitiontemperatures B softening pointsC flow temperatures试题内容Why areplasticizers addedto polymers A To improvetensile strengthB To improvepressive strengthC To improveflexibility D To improvethermal stabilityE To improvetoughness试题内容Which polymerizationtechnique isgenerally used to producecrosslinked andwork polymers A Addition polymerizationB Condensation polymerizationC not clear试题内容If aceramic pieceis desiredthatisdense and in addition istoexperience verylittle orno grain growth duringits processing whichofthefollowingpowderpressingtechniques shouldbeused A Uniaxial pressing followed byfiring B Isostatic pressing followed byfiring C Hot pressing 试题内容For powderpressing ofceramic pieces degree ofpaction ismaximized whena mixtureof largeand smallparticles isused A False B True C not clear试题内容For aclay based ceramicbody if the rateofevaporation isgreater than therateof waterdiffusion throughthe body the surfacewill drymore rapidlythan theinterior A True B False C not clear试题内容Howmanyatomsormoleculesarethereinamoleofasubst ance A6E41B6 023E23C3E42D1E10试题内容How arecontinuous fiberstypically orientedin fibrousposites A Aligned B Partially oriented C Randomly oriented D All ofthe above试题内容Which ofthefollowingterms isusedtodescribe theluminescence phenomenonwhen thereemission ofphotons oursin muchless thanone secondafter theexcitation event A Phosphorescence B Fluorescence C not clear试题内容A pletelyamorphous andnonporous polymerwill beA Transparent B Translucent C Opaque试题内容In thevisible spectrum a semiconductorthatisa singlecrystal andnonporous maybeA transparent ortranslucent B translucent oropaque C transparent oropaque试题内容Which ofthefollowingterms isusedtodescribe amaterial thattransmits lightdiffusely A Transparent B Opaque C Translucent试题内容What isthe orderof magnitudewavelength forvisible light A 0 5angstroms B 0 5nanometers C 0 5micrometers D 0 5millimeters E 0 5meters F 0 5kilometers试题内容For aclay based ceramicbody if therateofevaporation isgreater thantherateof waterdiffusion throughthe body the surfacewill drymore rapidlythantheinterior A true B false C not clear试题内容Laminar positeshave highstrengths inall directions in threedimensions A true B false C not clear试题内容Compared toother ceramicmaterials ceramic matrix positeshave better higher A fracture toughnesses B oxidation resistance C stability atelevatedtemperatures D Alloftheabove试题内容For aposite material isthematrix phasenormally moreductile orless ductilethanthedispersed phase A More ductile B Less ductileC not clear试题内容Which ofthefollowingdescribes fibers A Polycrystalline andamorphous materialswith smalldiameters B Single crystalswith extremelylarge length to diameter ratios C Metal wireshaving relativelylarge diameters 试题内容For analigned fibrousposite whenastress isapplied perpendiculartothefibers what isthe reinforcementefficiency A 0B 0 5C 0 8D 1试题内容Polyethylen e polystyrene andnylonform workpolymers A trueB falseC notclear试题内容A polymeris reallyjust Aa linearmacromolecule made from lotsof monomersall linkedtogether Ba collectionof moleculesall linkedtogether ina bigcrosslinked workCahighly branchedgiant moleculewith lotsof branchpoints andarms Da collectionof moleculesthat associatestrongly throughhydrophobic ionic orhydrogen bonds试题内容A rubbercar tirecannot bemelted forrecycling because A it containsso muchstored elasticpotential energythat itspontaneously burstsinto flamesshortly aftertransforming intoaliquid B all blackmaterials including soot charcoal graphite and cartires don t melt C itisactually oneenormous moleculeand cannotbee aliquid D the moleculesfrom whichit s poseddo notform crystalsand onlycrystalline materialscan meltto formliquids 试题内容A brittlematerial typicallyexhibits substantialplastic deformationwithhi