在线网课知道智慧《工程流体力学（山大）》单元测试考核答案

第一章单元测试第二章单元测试第三章单元测试第四章单元测试第五章单元测试第六章单元测试第七章单元测试第八章单元测试第一章单元测试1【单选题】(2分)Examplesofprimaryquantitiesarewhichofthefollowing?（）。A.Length,Time,Mass,andTemperatureB.Size,Density,andTextureC.None.D.Length,Mass,andChemicalStructure2【单选题】(2分)WhichofthefollowingselectionsareallBritishGravitationalSystemunits?（）。A.foot,minute,liter,Celsius,andkgB.foot,pound,Newton,gallonC.foot,liter,Kelvin,Celsius,andpoundD.foot,second,pound,Rankin,andslug3【单选题】(2分)Specificvolumeisthereciprocalofwhatmeasurement?（）。A.massB.densityC.volumeD.gravity4【单选题】(2分)Howcantheabsolutepressurebefoundbyusingthegagepressure?（）。A.byaddingthegagepressureandtheatmosphericpressureB.bysubtractingtheatmosphericpressurefromthegagepressureC.byusingtheequationP=ρRTD.cannot5【单选题】(2分)Fluidsforwhichtheshearingstressisnotlinearlyrelatedtotherateofshearingstrainaredesignatedaswhat?（）。A.NewtonianfluidB.non-NewtonianfluidC.viscousfluidsD.None第二章单元测试1【单选题】(2分)Forabodypartiallysubmergedinafluidandatequilibrium,whichofthefollowingisatruestatement?（）。A.TheweightofthebodyisgreaterthantheweightofthevolumeoffluiddisplacedB.TheweightofthebodyisequaltotheweightofthevolumeoffluiddisplacedC.TheweightofthebodyislessthantheweightofthevolumeoffluiddisplacedD.Thespecificgravityofthebodyisgreaterthanthespecificgravityofthefluid2【单选题】(2分)Aninclined-tubemanometerisbeingusedasshowntomeasurethepressureinapressurizedtank.Thetankispartiallyfilledtoadepthof20cmwithafluidofspecificgravity=0.78.Thespecificgravityofthemanometricgagefluidis3.5.Thegagepressureintheheadspace(kPa)whenh=8cmismostnearly（）。A.1.2B.1.8C.0.3D.0.93【单选题】(2分)Acleanglasstubeistobeselectedinthedesignofamanometertomeasurethepressureofkerosene.Specificgravityofkerosene=0.82andsurfacetensionofkerosene=0.025N/m.Ifthecapillaryriseistobelimitedto1mm,thesmallestdiameter(cm)oftheglasstubeshouldbemostnearly（）。A.2.00B.1.50C.1.25D.1.754【单选题】(2分)ThefigureshowstwocylindersofdiameterDand2D,connectedtoeachotherandcontaininganincompressiblefluid.Thetwocylindersarefittedwithleak-proofpistonsofweightW1andW2asshown.Whichofthefollowingisacorrectexpression?（）。A.5【单选题】(2分)Thefigureshowstherelationshipbetweenshearstressandvelocitygradientfortwofluids,AandB.Whichofthefollowingisatruestatement?（）。A.AbsoluteviscosityofAislessthanthatofBB.KinematicviscosityofAislessthanthatofBC.AbsoluteviscosityofAisgreaterthanthatofBD.KinematicviscosityofAisgreaterthanthatofB第三章单元测试1【单选题】(2分)Ifaflowisunsteady,its____maychangewithtimeatagivenlocation.（）。A.TemperatureB.VelocityC.DensityD.Alloftheabove2【判断题】Iftheflowissteady,therecanbechangesinvelocityatdifferentlocationsintheflowfield,TrueorFalse?（）A.对B.错第四章单元测试1【判断题】Afixedcoordinatesystemisnon-inertial.TrueorFalse?（）A.对B.错2【判断题】Accordingtothesignconvention,massflowrateoutofthecontrolvolumeisnegativeandthemassflowrateinispositive.TrueorFalse?（）A.错B.对4【单选题】(2分)WhenusingNewton'ssecondlawappliedacrossstreamlinesandtheBernoulliequationitisimportanttobesure____.（）。A.AlloftheaboveB.thattheflowwillneverleavethestreamlinesC.thatalloftheassumptionsarenotviolatedD.thatthepressuregradientsdonotchange5【单选题】(2分)TheBernoulliequationcanbewrittenintermsofheightscalledwhat?（）。A.levelsB.metersC.headsD.elevations第五章单元测试2【单选题】(2分)Howistheaccelerationofaparticledescribed?（）。A.ThroughNewtonianequations.B.Byusingthematerialderivative.C.Throughthemassflowrateandthesurfaceintegral.D.none3【单选题】(2分)Howdoesvorticityrelatetotherotationvector?（）。A.VorticityisperpendiculartotherotationvectorB.Vorticityistwicetherotationvector.C.Theyarethesame.D.Doesnotmatter.4【判断题】Forirrotationalflow,thevorticityiszero.TrueorFalse?（）A.错B.对5【单选题】(2分)Howdoesvorticityrelatetotherotationvector?（）。A.FourierB.EulerC.MaclaurinD.Taylor第六章单元测试1【单选题】(2分)Dimensionalanalysisisthewhentheresultsofanequationwillbewhatinrelationtothesystemofunitschosen.（）。A.NoneB.DependentC.ConstantD.Independent2【单选题】(2分)Thedimensionsofthevariableontheleftsideoftheequationmustbe____thedimensionsofanytermthatstandsbyitselfontherightsideoftheequalsign.（）。A.fewerthanB.greaterthanC.noneD.equalto3【单选题】(2分)Therequirednumberofpitermsiswhatcomparedtothenumberoforiginalvariables?（）。A.noneB.greaterthanC.equaltoD.fewerthan4【单选题】(2分)Whenusingtherepeatingvariablesmethod,thenumberofrepeatingvariablesthatareselectedshouldbewhatcomparedtothenumberofreferencedimensions?（）。A.greaterthanB.fewerthanC.equaltoD.none第七章单元测试1【单选题】(2分)Whatismostlikelytobethemaindrivingforceinpipeflow?（）。A.ForceB.VacuumC.GravityD.Apressuregradient3【单选题】(2分)Thenatureofpipeflowis____.（）。A.constantB.randomC.turbulentD.stronglydependentonwhethertheflowislaminarorturbulent4【单选题】(2分)Inthecaseoffullydevelopedpipeflow,____.（）。A.theflowisacceleratingataconstantrate.B.thevelocityprofileisthesameatanycrosssectionofthepipe.C.randomD.thevelocityprofileisirregular.5【单选题】(2分)Steady,fullydevelopedpipeflowexperiencesno____.（）。A.NoneB.AccelerationC.MotionD.Friction第八章单元测试1【单选题】(2分)A2-in.diametershaftissupportedbytwosleeves,eachoflength=2in.Theinternaldiameterofthesleevesis2.1