电厂锅炉及设备Power plant boiler and equipment文档格式.docx

电厂锅炉及设备Power plant boiler and equipment文档格式.docx

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Answer:

B

2.Accordingtothesteamparameters:

thepressuretypeoftheboilerunderp=20MPais（）

A.highpressureb.highpressurec.subcriticald.supercritical

C

3.Accordingtothecycleofworkquality:

whattypeofboilerisalways1fortheloopratio?

A.DirectcurrentboilerB.NaturalcirculationboilerC.ForcedcirculationfurnaceD.Compoundcirculatingfurnace

A,

4.Whichofthefollowingdevicesdoesnotbelongtotheheatingsurface（）

A.AirpreheaterB.EconomizerC.ReheaterD.Drumorsodaseparator

D

5.Themainformofboilersforlargecoal-firedpowerplantsis（）

A.floorcombustionfurnacec.cyclonefurnaced.fluidizedbedboiler

6.Continuousoperationhoursrefersto（）

A.thenumberofhoursofoperationoftheboilerwhenitisfinishedinthefirststop

C.thenumberofhoursofoperationbetweenthetwoaccidents

7.Thepowerofthedcboilerworkingcycleis（）

A.Thedensitydifferencebetweenthedowndrafttubeandtheevaporationtube

C.PumpD.Circulatingpumpsandpumps

8.Whichofthefollowingdevicesdoesnotbelongtotheboilersection（）

A.SteampackB.EconomizerC.AirpreheaterD

9.Thethreemainenginesofcoal-firedpowerplantsarenotincluded（）

A.coalmillb.steamturbinec.generatord.boiler

10.Intheprocessofconvertingthechemicalenergyofcoalintosteam,thefollowingsystem（）isnotinvolved.

A.condensatesystemb.smokesystemC.SodasystemD.Combustionsystem

Thesecondchapter

Read[183]timesaltogether

Standardcoalisusedforthefuelof29310kJ/kg（s）

A.drybasisb.drybasisd.airdryingbase

2.Commonlyusedtoindicatetheanalysisofthevolatilecontentofcoalis（）.

3.Themeltingpropertiesofgrayaregenerallyrepresentedby（）

A.deformationtemperatureb.softeningtemperaturec.flowtemperatured.meltingtemperature

4.Whichofthefollowingcoalhasthehighestvolatilecontent（）

A.AnthraciteB.PoorcoalC.LigniteD.Bituminouscoal

5.Whichofthefollowingcoalhasthehighestcarboncontent（）

A.anthraciteb.poorcoalc.browncoald.coal

6.Thecompositionofcoalisnotaharmfulcomponentorelementis（）

A.（H）B.（N）C.（S）D.（A）

7.Thecompositionofcoalisacombustiblecomponentorelementis（）

A.（N）B.（O）C.（H）D.（A）

8.Thecompositionofcoalisanincombustiblecomponentorelementis（）

A.（S）B.（O）C.（C）D.（H）

9.

Thehighestcalorificcomponentinthecompositionofcoalis（）

10..Themainsourceofheatfromcoal（）

A.（H）B.（S）C.（C）D.Volatile

Thethirdchapter

Read[151]timesaltogether

1.Theheatlosscausedbytheashcontainingtheunburnedcarbonis（）

A.chemicalincompletecombustionlossb.mechanicalincompletecombustionlossc.exhaustheatlossd.slagphysicalheatloss

2.Theeffectiveutilizationheatofboilerdoesnotinclude（）

A.unsaturatedwaterabsorptionb.heatvaporandheatabsorptionc.saturatedsteam

3.Theoptimalexcessaircoefficientisindependentofanyofthefollowingindicators（）

A.exhaustheatlossb.chemicalincompleteheatlossc.mechanicalincompleteheatlossd.heatloss

4.Whencalculatingfuelconsumption,itisthefuelconsumptionthatactuallyparticipatesincombustionreactioninthefurnaceexcept（after）.

A.exhaustheatlossb.chemicalincompletecombustionlossc.mechanicalincompletecombustionlossd.slagphysicalheatloss

5.Thesourceofmoistureinthesmokedoesnotincludewhichofthefollowing（）

A.theexternalmoistureismixedintob.airiscarryingc.thehydrogeninthefuelisgeneratedbythecombustionofhydrogen

6.Ingeneral,thefluegasofcoal-firedboilersdoesnotincludewhichfuel（）

A.H2b.COc.CH4d.H2S

7.Thefollowingoptionsdonotbelongtotheboilerinputheat（）

A.thephysicalheatingofthefuelisreceivedfromthebasehigh

C.Whentheexternalheatsourceheatstheair,theheatisbroughtintotheheat

8.Themainsubstancesintheoreticalairvolumedonotcontainwhichofthefollowing（）

A.nitrogenb.oxygenc.carbondioxided.sulfurdioxide

9.Excessaircoefficientinthefurnacerefersto（）

A.FurnaceB.Tailflue

10.Forcoal-firedboilers,whenmeetingcertainconditions,theinputheatoftheboilerisequaltothecalorificvalueofthecoalfired,whichisnot