ATPL网上题库4飞行原理.doc
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ATPL网上题库4飞行原理.doc
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4,飞行原理
(1)Howcanthestabilityoftheatmospherebedetermined?
·A.Ambienttemperaturelapserate.
·B.Atmosphericpressureatvariouslevels.
·C.Surfacetemperature/dewpointspread.
正确答案:
A
(2)____preventsairflowingdirectlyfromthehighpressureareatolowpressureareawhenairmovesinaleveldirection.
·A.Frictionforce.
·B.Inertialcentrifugalforce.
·C.Coriolisdeflectingforce.
正确答案:
C
(3)Onepurposeofhigh-liftdevicesisto
·A.increasetheloadfactor.
·B.delaystall.
·C.increaseairspeed.
正确答案:
B
(4)Theprimarypurposeofhigh-liftdevicesistoincreasethe
·A.L/Dmax.
·B.Liftatlowspeeds.
·C.Dragandreduceairspeed.
正确答案:
B
(5)Airflowseparationoverthewingcanbedelayedbyusingvortexgenerators
·A.directinghighpressureairoverthetopofthewingorflapthroughslotsandmakingthewingsurfacesmooth.
·B.directingasuctionoverthetopofthewingorflapthroughslotsandmakingthewingsurfacesmooth.
·C.makingthewingsurfaceroughand/ordirectinghighpressureairoverthetopofthewingorflapthroughslots.
正确答案:
C
(6)Describedynamiclongitudinalstability.
·A.Motionaboutthelongitudinal.
·B.Motionaboutthelateralaxis.
·C.Motionabouttheverticalaxis.
正确答案:
B
(7)Identifythetypestabilityiftheaircraftattituderemainsinnewpositionafterthecontrolshavebeenneutralized.
·A.Negativelongitudinalstaticstability
·B.Neutrallongitudinaldynamicstability
·C.Neutrallongitudinalstaticstability
正确答案:
C
(8)Identifythetypestabilityiftheaircraftattitudetendstomovefartherfromitsoriginalpositionafterthecontrolshavebeenneutralized.
·A.Negativestaticstability
·B.Positivestaticstability
·C.Negativedynamicstability
正确答案:
A
(9)Identifythetypestabilityiftheaircraftattitudetendstoreturntoitsoriginalafterthecontrolshavebeenneutralized.
·A.Positivedynamicstability.
·B.Positivestaticstability.
·C.Neutraldynamicstability.
正确答案:
B
(10)Whatisacharacteristicoflongitudinalinstability?
·A.Pitchoscillationsbecomingprogressivelygreater.
·B.Bankoscillationsbecomingprogressivelygreater.
·C.Aircraftconstantlytriestopitchdown.
正确答案:
A
(11)Iftheairplaneattituderemainsinanewpositionaftertheelevatorcontrolispressedforwardandreleased,theairplanedisplays
·A.neutrallongitudinalstaticstability.
·B.positivelongitudinalstaticstability.
·C.neutrallongitudinaldynamicstability.
正确答案:
A
(12)Whichistrueregardingtheforcesactingonanaircraftinasteady-statedescent?
·A.Thesumofallupwardforcesislessthanthesumofalldownwardforces.
·B.Thesumofallrearwardforcesisgreaterthanthesumofallforces.
·C.Thesumofallforwardforcesisequaltothesumofallrearwardforces.
正确答案:
C
(13)WhatperformanceischaracteristicofflightatmaximumL/Dinapropeller-drivenairplane?
·A.Maximumrangeanddistanceglide.
·B.Bestangleofclimb.
·C.Maximumendurance.
正确答案:
A
(14)WhatistheeffectontotaldragofanaircraftiftheairspeeddecreasesinlevelflightbelowthatspeedformaximumL/D?
·A.Dragincreasesbecauseofincreasedinduceddrag.
·B.Dragincreasesbecauseofincreasedparasitedrag.
·C.Dragdecreasesbecauseoflowerinduceddrag.
正确答案:
A
(15)Whatistherelationshipbetweeninducedandparasitedragwhenthegrossweightisincreased?
·A.parasitedragincreasesmorethaninduceddrag
·B.induceddragincreasesmorethanparasitedrag
·C.bothparasiteandinduceddragareequallyincreased
正确答案:
B
(16)Whattrueairspeedandangleofattackshouldbeusedtogeneratethesameamountofliftasaltitudeisincreased?
·A.Thesametrueairspeedandangleofattack
·B.Ahighertrueairspeedforanygivenangleofattack
·C.Alowertrueairspeedandhigherangleofattack
正确答案:
B
(17)Whatwillbetheratiobetweenairspeedandliftiftheangleofattackandotherfactorsremainconstantandairspeedisdoubled?
Liftwillbe
·A.Thesame.
·B.Twotimesgreater.
·C.Fourtimesgreater.
正确答案:
C
(18)Whyisitnecessarytoincreasebackelevatorpressuretomaintainaltitudeduringaturn?
Tocompensateforthe
·A.lossoftheverticalcomponentoflift
·B.lossofthehorizontalcomponentofliftandtheincreaseincentrifugalforce
·C.rudderdeflectionandslightoppositeaileronthroughouttheturn
正确答案:
A
(19)Atwhichspeedwillincreasingthepitchattitudecauseanairplanetoclimb?
·A.Lowspeed.
·B.Highspeed.
·C.Anyspeed.
正确答案:
B
(20)Ifnocorrectiveactionistakenbythepilotasangleofbankisincreased,howistheverticalcomponentofliftandsinkrateaffected?
·A.Liftincreasesandthesinkrateincreases.
·B.Liftdecreasesandthesinkratedecreases.
·C.Liftdecreasesandthesinkrateincreases.
正确答案:
C
(21)Ifsevereturbulenceisencountered,whichprocedureisrecommended?
·Maintainaconstantaltitude.
·Maintainaconstantattitude.
·Maintainconstantairspeedandaltitude.
正确答案:
B
【解析】遇到剧烈颠簸,如雷暴中如试图保持某一高度几乎是不可能的,而且这样做会增加机体的压力。
这时应允许飞机随气流升降并保持飞机的姿态,这样机体承受的压力将是最小的。
(22)Howcananairplaneproducethesameliftingroundeffectaswhenoutofgroundeffect?
·A.Thesameangleofattack.
·B.Alowerangleofattack.
·C.Ahigherangleofattack.
正确答案:
B
(23)Whatisapurposeofflightspoilers?
·A.Increasethecamberofthewing.
·B.Reduceliftwithoutincreasingairspeed.
·C.Directairflowoverthetopofthewingathighanglesofattack.
正确答案:
B
(24)Forwhichpurposemayflightspoilersbeused?
·A.Reducethewings'liftuponlanding.
·B.Increasetherateofdescentwithoutincreasingaerodynamicdrag.
·C.Aidinlongitudinalbalancewhenrollinganairplaneintoaturn.
正确答案:
A
(25)Whichisapurposeofgroundspoilers
·A.Reducethewingsliftuponlanding
·B.Aidinrollinganairplaneintoturn.
·C.Increasetherateofdescentwithoutgainingairspeed.
正确答案:
A
(26)Whatisthepurposeofacontroltab?
·A.Movetheflightcontrolsintheeventofmanualreversion.
·B.Reducecontrolforcesbydeflectingintheproperdirectiontomoveaprimaryflightcontrol.
·C.Preventacontrolsurfacefrommovingtoafull-deflectionpositionduetoaerodynamicforces.
正确答案:
A
(27)Whichisapurposeofwing-mountedvortexgenerators?
·A.Reducethedragcausedbysupersonicflowoverportionsofthewing
·B.Increasetheonsetofdragdivergenceandaidinaileroneffectivenessathighspeed
·C.Breaktheairflowoverthewingsothestallwillprogressfromtherootouttothetipofthewing
正确答案:
A
(28)Whatisthepurposeofaservotab?
·A.Movetheflightcontrolsintheeventofmanualreversion.
·B.Reducecontrolforcesbydeflectingintheproperdirectiontomoveaprimaryflightcontrol.
·C.Preventacontrolsurfacefrommovingtoafull-deflectionpositionduetoaerodynamicforces.
正确答案:
B
(29)Whatisthepurposeofanelevatortrimtab?
·A.Providehorizontalbalanceasairspeedisincreasedtoallowhands-offflight.
·B.Adjustthespeedtailloadfordifferentairspeedsinflightallowingneutralcontrolforces.
·C.Modifythedownwardtailloadforvariousairspeedsinflighteliminatingflight-controlpressures.
正确答案:
C
(30)Whichdirectionfromtheprimarycontrolsurfacedoesaservotabmove?
·A.Samedirection.
·B.Oppositedirection.
·C.Remainsfixedforallpositions.
正确答案:
B
(31)Whichdirectionfromtheprimarycontrolsurfacedoesananti-servotabmove?
·A.Samedirection.
·B.Oppositedirection.
·C.Remainsfixedforallpositions.
正确答案:
A
(32)Whichdirectionfromtheprimarycontrolsurfacedoesanelevatoradjustabletrimtabmovewhenthecontrolsurfaceismoved?
·A.Samedirection.
·B.Oppositedirection.
·C.Remainsfixedforallpositions.
正确答案:
C
(33)Whatisthereasonforvariationsingeometricpitchalongapropellerorrotorblade?
·A.Itpermitsarelativelyconstantangleofattackalongitslengthwhenincruisingflight.
·B.Itpreventstheportionofthebladenearthehuborrootfromstallingduringcruisingflight.
·C.Itpermitsarelativelyconstantangleofincidencealongitslengthwhenincruisingflight.
正确答案:
A
(34)Whichflightconditionsofalargejetairplanecreatethemostsevereflighthazardbygeneratingwingtipvorticesofthegreateststrength?
·A.Heavy,slow,gearandflapsup.
·B.Heavy,slow,gearandflapsdown.
·C.Heavy,fast,gearandflapsdown.
正确答案:
A
(35)Wingtipvorticescreatedbylargeaircrafttendto
·A.Sinkbelowtheaircraftgeneratingtheturbulence.
·B.Risefromthesurfacetotrafficpatternaltitude.
·C.Accumulateandremainforaperiodoftimeatthepointwherethetakeoffrollbegan.
正确答案:
A
(36)Whichstatementistrueconcerningthewaketurbulenceproducedbyalargetransportaircraft?
·A.Vorticescanbeavoidedbyflying300feetbelowandbehindtheflightpathofthegeneratingaircraft.
·B.Thevortexcharacteristicsofanygivenaircraftmaybealteredbyextendingtheflapsorchangingthespeed.
·C.Waketurbulencebehindapropeller-drivenaircraftisnegligiblebecausejetenginethrustisanecessaryfactorintheformationofvortices.
正确答案:
B
(37)Ifyoutakeoffbehindaheavyjetthathasjustlanded,youshouldplantoliftoff
·A.priortothepointwherethejettoucheddown.
·B.beyondthepointwherethejettoucheddown.
·C.atthepointwherethejettoucheddownandontheupwindedgeoftherunway.
正确答案:
B
(38)Howdoesthewak
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