工程英语试题库2

1.Anautodischargefireextinguishingsystemprovidesfireextinguishingcapabilitytothelavatorywastecompartment.Extinguishingisaccomplishedbyfloodingthelavatorywastecompartmentwithaninertgas.Theextinguishingsystemconsistsofaheatactivatedextinguisherbottleandatemperatureindicator.Thelavatoryfireextinguisherbottleismountedinsidethelavatorycabinetassemblywiththedischargetubesextendingintothewastecompartment.Theextinguisherbottlecontainsfusibletipswhichhaveameltingtemperatureof174degreesFahrenheit(79degreesCelsius).Whenafireoroverheatconditionoccurswiththewastecompartmenttemperaturesrisingto174degreesFahrenheit,thetipswillmeltcausingthebottletodischarge.Thetemperatureindicatorinavinylplatecontaining4heatsensitivepatches.Eachpatchwillchangefromgraytoblackwhenexposedtotemperaturesfrom180degreesFahrenheitto250degreesFahrenheit.Thisindicatorshouldbeperiodicallycheckedandifitindicatesanoverheatthebottlecontentsshouldbecheckedbyweighing.1Inwhatwaydoesthefireextinguishingsystemputoutfiresinthelavatorywastecompartment?(D)AFillupthewastecompartmentwithwater.BGiveoffanalarmonECAMscreeninthecockpit.CUseoxygengastofloodthewastecompartment/DEjectgasessuchascarbondioxide,nitrogen,etc.2Anextinguishingsysteminalavatoryconsistsof__.(D)AanextinguisherbottleandadischargetubeBanextinguisherbottleandfusibletipsCsensitivepatchesandatemperatureindicatorDanextinguisherbottleandatemperatureindicator3Howdoestheextinguisherbottlework?(A)AItiscontrolledbythetemperature.ThefusibletipswillmeltwhentheteBItiscontrolledbypilots.ThefusibletipsexplodewhenthepilotspushtCItisoperatedmanuallyasaportableextinguisherworks.DItiscontrolledbythetemperature.Thegasinthebottleejectsfromthe4Whatisthefunctionofthepatchesinthetemperatureindicator?(D)AMakinguptheleakage.(D)BMeasuringthetemperature.CIndicatingthegasquantityinthebottle.DIndicatingafireofoverheatoccurringaround.5Onceapatchchangesitscolor,whatshouldbedoneaccordingtothepassage?(D)AChanginganewpatch.BCheckingthewastecompartmenttolearnwhetheritisonfire.CCarryingoutextinguishingproceduresimmediately.DCheckingtheextinguisherbottle.2．Since1965,Whenitsequipmentbecameoperational,adevicecalledEroshasbeentomakeskytrafficsafe.ErosisshortEliminateRangeZeroSystem-rangezeromeaningcollision.BasicallyErosisacomputersystemthatmeasures,withgreatspeedandprecision,closingspeed(thespeedatwhichtwoobjectsareapproachingeachother)andrange(thedistanceapartoftheobjects).Eroscanwarnaircraftapproachingeachotheratjetspeedsandcanprovideprotectionforasmanyasathousandaircraftinawidearea.ThepilotofanEros-equippedaircraftheadingforacollisionhearswarningnoiseinhisearphoneswhenhisairbornecomputercalculatesthatheiswithinthirtysecondsofhalfamile(whicheveroccursfirst)ofanotheraircraft.Atthesametime,aflashingredarrowonthedevice’sindicatorpanelinstructshimtodescend.Simultaneously,intheotheraircraft,thesignalisautomaticallyreversed:Theflashingarrowtellsthepilottoclimb.ThenewerErosIIsystemcanaccommodateatotaloftwothousandaircraftatonetimewithina140-mileradius,Everythreeseconds,eachEros-equippedplaneautomaticallyreportstogroundstationsandtosimilarlyequippedaircraftitspreciserange,altitude,andapproachrate.TheproducersofEros,theMcDonnellDouglasCorporationinTheUnitedStates,arenowstudyingthefittingofEroscollision-avoidancesystemsinallsizesandtypesofaircraft.AutomaticsystemssuchasEroswilldomorethanmaketheskysafer:theywillalsolightentheworkofair-trafficcontrollersandincreasetheefficiencyofairports.1Twoaircraftatrangezeromeans__.(B)AanearmissBacollisionCsupersonicspeedDwingtipseparation2Asacomputer,Eroswasdesignedtomeasure__.(A)AclosingspeedandrangeBanaircraft’saltitudeanddistancefromanairportCbothAandBDneitherAnorB3ThedevicegivesitsfirstwarningtopilotsoftwoEros-equippedaircraftwithin__.(C)AthirtysecondsofeachotherBhalfamileofeachotherCbothAandBDneitherAandB4Thedeviceworksbygiving__.(C)Aawarningnoiseinthepilot’searphonesBinstructionstoascendordescendCbothAandBDneitherAnorB5DetailsabouttheErosIIsystemindicatethat__.(D)AaircraftcoverageofthedevicehasincreasedBgroundstationsareincludedinthesystemCthedevicemeasuresaltitudeDalloftheabove3.Electricalengineeringplaysagreatroleinnavigationaidsthroughelectronicsandradarloranplaysaveryimportantrole.Herethreefixedtransmitterssendradiopulsessimultaneously.Thepositionofashiporanairplanecanbedeterminedbymeasuringthetimedifferencewithwhichthesepulsestheship.Radiorangeisanotherexample.FiveantennasarearrangedatthecornersandcentreofasquareandsendradiowavesinsuchawaythatthepilotatthereceiverhearsaconstantsoundifheisoncourseortheMorescodeAorN,dependingonwhetherheistotherightofleftofit.Theinstrumentlandingsystemhasprovenveryvaluableinguidinganairplaneforlanding.Heretransmitterssimilartothoseinradiorangcontrol,throughspecialequipmentontheplane,givethedirectionaswellastheheightofthelandingplane.Threeadditionalbeaconsindicatetotheplaneitspositionaswellasthelandingpath.Thegroundcontrolapproachisasimplertechniquebywhichthegroundknowstheexactpositionoftheplaneandjustnotifiesthepilotbyradiowhetherornotheisoncourse.Thistechniqueemplo