工程流体力学智慧树知到答案章节测试2023年山东大学

第一章测试Examplesofprimaryquantitiesarewhichofthefollowing?（）。

A:Length,Time,Mass,andTemperature

B:Length,Mass,andChemicalStructure

C:Size,Density,andTexture

D:None.

答案:AWhichofthefollowingselectionsareallBritishGravitationalSystemunits?（）。

A:foot,second,pound,Rankin,andslug

B:foot,pound,Newton,gallon

C:foot,minute,liter,Celsius,andkg

D:foot,liter,Kelvin,Celsius,andpound

答案:ASpecificvolumeisthereciprocalofwhatmeasurement?（）。

A:density

B:volume

C:mass

D:gravity

答案:AHowcantheabsolutepressurebefoundbyusingthegagepressure?（）。

A:bysubtractingtheatmosphericpressurefromthegagepressure

B:byaddingthegagepressureandtheatmosphericpressure

C:byusingtheequationP=ρRT

D:cannot

答案:BFluidsforwhichtheshearingstressisnotlinearlyrelatedtotherateofshearingstrainaredesignatedaswhat?（）。

A:None

B:Newtonianfluid

C:non-Newtonianfluid

D:viscousfluids

答案:C第二章测试Forabodypartiallysubmergedinafluidandatequilibrium,whichofthefollowingisatruestatement?（）。

A:Theweightofthebodyisequaltotheweightofthevolumeoffluiddisplaced

B:Theweightofthebodyislessthantheweightofthevolumeoffluiddisplaced

C:Theweightofthebodyisgreaterthantheweightofthevolumeoffluiddisplaced

D:Thespecificgravityofthebodyisgreaterthanthespecificgravityofthefluid

答案:AAninclined-tubemanometerisbeingusedasshowntomeasurethepressureinapressurizedtank.Thetankispartiallyfilledtoadepthof20cmwithafluidofspecificgravity=0.78.Thespecificgravityofthemanometricgagefluidis3.5.Thegagepressureintheheadspace(kPa)whenh=8cmismostnearly（）。

A:1.2

B:0.3

C:0.9

D:1.8

答案:BAcleanglasstubeistobeselectedinthedesignofamanometertomeasurethepressureofkerosene.Specificgravityofkerosene=0.82andsurfacetensionofkerosene=0.025N/m.Ifthecapillaryriseistobelimitedto1mm,thesmallestdiameter(cm)oftheglasstubeshouldbemostnearly（）。

A:2.00

B:1.50

C:1.25

D:1.75

答案:CThefigureshowstwocylindersofdiameterDand2D,connectedtoeachotherandcontaininganincompressiblefluid.Thetwocylindersarefittedwithleak-proofpistonsofweightW1andW2asshown.Whichofthefollowingisacorrectexpression?（）。

A:=

B:=

C:＝

D:=

答案:BThefigureshowstherelationshipbetweenshearstressandvelocitygradientfortwofluids,AandB.Whichofthefollowingisatruestatement?（）。

A:KinematicviscosityofAisgreaterthanthatofB

B:AbsoluteviscosityofAislessthanthatofB

C:KinematicviscosityofAislessthanthatofB

D:AbsoluteviscosityofAisgreaterthanthatofB

答案:D第三章测试Ifaflowisunsteady,its____maychangewithtimeatagivenlocation.（）。

A:Temperature

B:Density

C:Velocity

D:Alloftheabove

答案:DIftheflowissteady,therecanbechangesinvelocityatdifferentlocationsintheflowfield,TrueorFalse?（）

A:对

B:错

答案:AAnaccelerationfieldisafunctionof____and____withoutactuallyfollowinganyparticularparticle.____，____。

答案:Whatisastreamline?

答案:Whichisthemorecommonlyusedmethodtodescribefluidmotion,LagrangianorEulerian?

答案:第四章测试Afixedcoordinatesystemisnon-inertial.TrueorFalse?（）

A:对

B:错

答案:BAccordingtothesignconvention,massflowrateoutofthecontrolvolumeisnegativeandthemassflowrateinispositive.TrueorFalse?（）

A:错

B:对

答案:AWriteNewton’ssecondlawofmotion.

答案:WhenusingNewton’ssecondlawappliedacrossstreamlinesandtheBernoulliequationitisimportanttobesure____.（）。

A:thatthepressuregradientsdonotchange

B:Alloftheabove

C:thatalloftheassumptionsarenotviolated

D:thattheflowwillneverleavethestreamlines

答案:CTheBernoulliequationcanbewrittenintermsofheightscalledwhat?（）。

A:heads

B:levels

C:elevations

D:meters

答案:A第五章测试Whatisthesimplesttypeofmotionafluidparticlecanundergo?

答案:Howistheaccelerationofaparticledescribed?（）。

A:Byusingthematerialderivative.

B:Throughthemassflowrateandthesurfaceintegral.

C:ThroughNewtonianequations.

D:none

答案:AHowdoesvorticityrelatetotherotationvector?（）。

A:Vorticityistwicetherotationvector.

B:Vorticityisperpendiculartotherotationvector

C:Doesnotmatter.

D:Theyarethesame.

答案:AForirrotationalflow,thevorticityiszero.TrueorFalse?（）

A:错

B:对

答案:BHowdoesvorticityrelatetotherotationvector?（）。

A:Euler

B:Maclaurin

C:Fourier

D:Taylor

答案:D第六章测试Dimensionalanalysisisthewhentheresultsofanequationwillbewhatinrelationtothesystemofunitschosen.（）。

A:Independent

B:Constant

C:Dependent

D:None

答案:AThedimensionsofthevariableontheleftsideoftheequationmustbe____thedimensionsofanytermthatstandsbyitselfontherightsideoftheequalsign.（）。

A:greaterthan

B:fewerthan

C:none

D:equalto

答案:DTherequirednumberofpitermsiswhatcomparedtothenumberoforiginalvariables?（）。

A:none

B:fewerthan

C:greaterthan

D:equalto

答案:BWhenusingtherepeatingvariablesmethod,thenumberofrepeatingvariablesthatareselectedshouldbewhatcomparedtothenumberofreferencedimensions?（）。

A:equalto

B:none

C:fewerthan

D:greaterthan

答案:AWritetheReynoldsnumberequation.

答案:第七章测试Whatismostlikelytobethemaindrivingforceinpipeflow?（）。

A:Gravity

B:Force

C:Vacuum

D:Apressuregradient

答案:DWhatistheappropriatedimensionlessparametertouseincomparingflowtypes?

答案:Thenatureofpipeflowis____.（）。

A:stronglydependentonwhethertheflowislaminarorturbulent

B:constant

C:turbulent

D:random

答案:AInthecaseoffullydevelopedpipeflow,____.（）。

A:thevelocityprofileisirregular.

B:random

C:theflowisacceleratingataconstantrate.

D:thevelocityprofileisthesameatanycrosssectionofthepipe.

答案:DSteady,fullydevelopedpipeflowexperiencesno____.（）。

A:None

B:Acceleration

C:Motion

D:Friction

答案:B第八章测试A2-in.diametershaftissupportedbytwosleeves,eachoflength=2in.Theinternaldiameterofthesleevesis2.1in.Theradialspacebetweentheshaftandthesleevesisfilledwithanoilofviscosity=8×10-3lb-s/ft2.Iftheshaftis