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1、流体力学（fluidmechanics）1.,thefactorsrelatingtoNewton'slawofinternalfrictionare:A,pressure,velocityandviscosity;B,fluidviscosity,shearstressandangulardeformationrate;C,shearstress,temperature,viscosityandvelocity;D,pressure,viscosityandangulardeformation.2.,inthestudyoffluidmovement,thefluidcanbed
2、ividedintotwopartsaccordingtowhetherornottheviscosityofthefluidisconsidered:A,NewtonfluidandnonNewtonfluid,B,compressiblefluidandincompressiblefluid;C,homogeneousfluidandheterogeneousfluid,D,idealfluidandrealfluid.3.thefollowingfourstatementsaboutthequalityandweightoffluidsarecorrectandrigorou
3、s.Athemassandweightofafluiddonotvarywithposition;Bthemassandweightofafluidvarywithposition;Cthemassofafluidvarieswithpositionwhileitsweightremainsconstant;Dthemassofthefluiddoesnotvarywithposition,buttheweightvarieswithposition.4.fluidisasubstance.Acontinuestoexpanduntilitisfullofcontainers;Bi
4、sactuallyincompressible;C,cannotwithstandtheshearstress;D,notinasheareffectremainsstationary.5.shearstressoffluid.Adoesnotoccurwhenthefluidisatrest;B,whenthefluidisinastationarystate,duetocohesion,canbeproduced;Cdependssolelyonthemomentumexchangeofmolecules;Ddependssolelyoncohesion.Thedynamicv
5、iscosityof6.Aandstationaryliquidis0,andthekinematicviscosityofBandstationaryliquidis0;TheshearstressofCandstationaryliquidis0;thecompressivestressofDandstationaryliquidis0.7.idealliquidsarecharacterizedbyA,viscosityconstantB,nonstickyC,incompressibleD,inlinewith.8.hydraulics,unitmassforcerefer
6、stotheroleinthe_____forceperunitmassofliquid.A,areaB,volumeC,massD,weightThedimensionofthemassforceof9.unitsisA,L*T-2,B,M*L2*T,C,M*L*T(-2),D,L(-1),*T10.perunitvolumeoftheweightoftheliquidiscalledliquid______,itsunit.A,bulkdensityN/m2B,bulkdensityN/M3C,densitykg/m3D,densityN/m311.differentliqui
7、dviscositywiththeviscosity_____,aliquidisdecreasedwiththetemperature______.A,thesamereductionofB,thesameelevatedC,differentD,differentelevation12.liquidviscositywithincreasingtemperature____,gasviscosityincreasedwithincreasingtemperatur
