注：不含主觀題第1題單選題(1分)ItcanbesmelledwhentheconcentrationofSO2intheairreaches()A0.0001%B0.0002%C0.0003%D0.0005%第2題單選題(1分)WhentheconcentrationofNO2inthetunnelreaches,peoplewillfeelthroatirritation()A0.004%B0.006%C0.01%D0.025%第3題單選題(1分)ItcanbesmelledwhentheH2Sconcentrationinthetunnelreaches()A0.0001%B0.001%C0.01%D0.1%第4題單選題(1分)Whentheoxygencontentinthetunneldecreasestoacertainlevel,peoplewilllosetheirabilitytowork()A17%B15%C12%D3%第5題單選題(1分)Accordingtotheregulations,theoxygencontentinthetunnelshallnotbelessthan()A5%B10%C15%D20%第6題單選題(1分)WhentheconcentrationofCO2inthetunnelexceeds,itmustbestoppedfortreatment()A1.0%B1.5%C2.0%D2.5%第7題單選題(1分)TheCO2concentrationinthetotalreturnairflowshallnotexceed()A0.5%B0.65%C0.7%D0.75%第8題單選題(1分)TheCO2concentrationinthetunnelshallnotexceed()A0.1%B0.2%C0.3%D0.5%第9題單選題(1分)WhentheCOconcentrationisreducedtowhatlevel,itwillcauseslightheadache()A0.02B0.08C0.32D1.28第10題單選題(1分)Whentheoxygenconcentrationintheairdropstowhatlevel,peoplewillhavedifficultybreathing()A17%B15%C12%D3%Chapter2Exercises第1題多選題(2分)MeasurestoreducelocalresistanceoftunnelincludeATrytoavoidsuddenexpansionorreductionoftheroadwaysectionBThesectionattheconnectionshallchangegraduallyCTrytoavoidrightangleturningDDonotparkvehiclesorstackwoodinthetunnel正確答案：ABCD第2題多選題(2分)MeasurestoreducetunnelfrictionresistanceincludeAReducefrictioncoefficientBReducetunnellengthCEnsuresufficienttunnelsectionDSelectthesectionwithsmallerperimeter正確答案：ABCD第3題多選題(2分)ThetotalresistanceofthetunnelincludesAFrictionalresistanceBLocalresistanceCAirflowresistance正確答案：AB第4題多選題(2分)CommontypesoflocalresistanceincludeAMutationBGradientCTurningDBifurcationandconvergence正確答案：ABCD第5題單選題(1分)Whentheoxygencontentinthetunneldecreasestowhatextent,peoplewilllosetheirmindsA17%B17%C12%D3%第6題單選題(1分)Duetothechangeoftunnelsection,bifurcationorconvergence,theuniformflowisaffectedanddestroyedinlocalareas,resultingintheenergylossofwindflow.ThisresistanceiscalledAFrictionalresistanceBLocalresistanceCAirflowresistance第7題單選題(1分)Whenairflowsinthetunnel,theresistancecausedbythefrictionbetweenthefluidandthetunnelwalliscalledAFrictionalresistanceBLocalresistanceCAirflowresistance第8題單選題(1分)ThejudgmentbasisforflowpatternofpipelineflowisAReBNuCPrDLe第9題單選題(1分)Whentheflowvelocityislarge,themovementvelocityofthefluidparticlechangesatanytimeinsizeanddirection,becomingamixedturbulentflow,calledALaminarflowBTurbulentflowCMixedflow第10題單選題(1分)Whentheflowrateislow,thefluidparticlesdonotmixwitheachotherandmoveinlayersparalleltothepipeaxis,whichiscalledALaminarflowBTurbulentflowCMixedflowChapter3Exercises第1題多選題(2分)ThefollowingperformanceparametersofthefanincludeAWindpressureBAirvolumeCAirvolumeDEfficiency正確答案：ABCD第2題多選題(2分)ThetypesofcentrifugalfanbladesaredividedintoABackwardbladeB

ForwardbladeCRadialbladeDTransverseblade正確答案：ABC第3題多選題(2分)Accordingtostructureandworkingprinciple,tunnelventilatorsaredividedintoACentrifugalfanBAxialflowfanCLocalventilatorD

Mainventilator正確答案：AB第4題多選題(2分)Accordingtoitsservicescope,tunnelventilatorsaredividedintoAMainventilatorBAuxiliaryventilatorCLocalventilatorDCentrifugalfan正確答案：ABC第5題單選題(1分)Accordingtotherequirements,thefanspeeddoesnotexceedtheratedvalue

A60%B70%C80%D90%第6題單選題(1分)ThedrawingprincipleoffanparallelcharacteristiccurveisAEqualairpressure,constantairvolumeBAirpressureadditionandairvolumeadditionCTheairpressureisaddedandtheairvolumeisequalDTheairpressureisequal,andtheairvolumeisadded第7題單選題(1分)Whenfansareconnectedinparallel,thetotalwindpressureisAWindpressureofeachfanBTotalwindpressureofallfansCUnchangedDDecrease第8題單選題(1分)Whenfansareconnectedinseries,thetotalairvolumeis

AAirvolumeofeachfanBTotalairvolumeofallfansCUnchangedDDecrease第9題單選題(1分)Fromaneconomicpointofview,theoperatingefficiencyofthefanisnotlowerthanA50%B60%C70%D80%第10題單選題(1分)VentilationformedbynaturalfactorsiscalledANaturalventilationBMechanicalventilationCMixedventilationChapter4Exercises第1題多選題(2分)ThethreelawsofairvolumedistributionincludeAAirvolumebalancelawBLawofwindpressurebalanceCDraglawDLawofconservationofenergy正確答案：ABC第2題多選題(2分)ThemethodstochangetheworkingcharacteristicsofthefanincludeAChangetheimpellerspeedofthefanBChangingthebladeinstallationangleofaxialflowfanCChangethebladeangleofthecentrifugalfan'sfrontguideDShortenthetotallengthoftheairflowroute正確答案：ABC第3題多選題(2分)ThemainmeasuresoftunnelairflowresistancereductionregulationmethodincludeAEnlargesectionalareaBReducefrictioncoefficientCRemoveobstaclesinthetunnelDShortenthetotallengthoftheairflowroute正確答案：ABCD第4題多選題(2分)ThemainmeasuresoftunnelairflowresistanceincreasingregulationmethodincludeAAdjustthewindshieldBAdjusttheaircurtainCRegulatingaircurtainDRegulatingpressure正確答案：ABC第5題多選題(2分)ThelocalairvolumeregulationmethodsoftunnelincludeAResistanceincreasingmethodBDragreductionmethodCAuxiliaryfanregulationmethodDOveralladjustment正確答案：ABC第6題單選題(1分)Whentheoxygencontentinthetunneldecreasestoacertainlevel,peoplewilldiequicklyA17%B15%C12%D3%第7題單選題(1分)ThemostcommonlyusedmethodoftunnelairflowresistanceincreasingregulationisARegulatingpressureBAdjusttheaircurtainCRegulatingaircurtainDAdjustthewindshield第8題單選題(1分)Whenthewindresistanceofabranchintheairnetworkchanges,thechangeamplitudeofairpressureandairvolumeofeachbranchisAThisbranchisthelargestBThisbranchisthesmallestCSamerangeofchange第9題單選題(1分)Whenthewindresistanceofabranchintheairnetworkdecreases,howdoesthewindpressureofthebranchchangeADecreaseBIncreaseCUnchanged第10題單選題(1分)Whenthewindresistanceofabranchintheairnetworkincreases,howdoestheairflowofthebranchchangeADecreaseBIncreaseCUnchangedChapter5Exercises第1題多選題(2分)ThecalculationofairdemandforheadingfaceincludesAAirvolumerequiredforremovingblastingsmokeBAirvolumerequiredforgasdischargeCAirvolumerequiredfordustremovalDCheckandcalculatetheairvolumeaccordingtothewindspeed正確答案：ABCD第2題多選題(2分)ThedisadvantagesofejectorventilationareALowwindpressureBSmallairvolumeCLowefficiencyDThereispondingproblem正確答案：ABCD第3題多選題(2分)TheadvantagesofejectorventilationareANoelectricalequipmentBNonoiseCSimpleequipmentDHighsecurity正確答案：ABCD第4題多選題(2分)ThecharacteristicsofdrawoutventilationareADirtyairflowsthroughthefanBShorteffectiverangeCPoorsmokeexhausteffectDDonotuseflexibleairduct正確答案：ABCD第5題多選題(2分)ThecharacteristicsofforcedventilationareAThefanisarrangedinthefreshairflowBLongeffectiverangeCHighwindspeedattheworkingfaceDFlexibleairductcanbeused正確答案：ABCD第6題多選題(2分)ThecommonventilationmethodsoflocalfanventilationaredividedintoAForcedventilationBDrawoutventilationCMixedventilationDGeneralventilation正確答案：ABC第7題多選題(2分)Accordingtotheventilationmode,localventilationcanbedividedintoAMainfanairpressureventilationBEjectorventilationCLocalfanventilationDGeneralventilation正確答案：ABC第8題單選題(1分)Usingtheventilationnegativepressuregeneratedbytheejector,theventilationmethodofguidingairthroughtheairductisAMechanicalventilationBNaturalventilationCLocalventilationDEjectorventilation第9題單選題(1分)TheventilationmodeforlocalfantopressairintotheairductisAForcedventilationBDrawoutventilationCMixedventilationDGeneralventilation第10題單選題(1分)ThemainmethodforlocalventilationoftunnelisAMainfanairpressureventilationBEjectorventilationCLocalfanventilationDGeneralventilationChapter6Exercises第1題多選題(2分)FeaturesofthecentralventilationsystemincludeASmallquantitiesBLowinitialinvestmentCSuitableforareaswithcomplexterrainDLargeventilation正確答案：AB第2題多選題(2分)Accordingtothedifferentpositionsofinletandreturnwellsinthewellfield,theventilationsystemcanbedividedintoACentralBDiagonalformCRegionalDHybrid正確答案：ABCD第3題多選題(2分)ThetunnelventilationsystemincludesAVentilationpowerBVentilationnetworkCVentilationcontrolfacilitiesDSafetydevices正確答案：ABC第4題單選題(1分)Thewindspeedbetweenthesuctioninletofthelocalfanandthereturnairflowoftheh