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Exam (elaborations)

DC boilers final exam review 2024

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  • DC BOILER
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  • DC BOILER

DC boilers final exam review 2024 The following considerations must be taken into account when designing a boiler except _________________. Unresponsive to sudden steam demands The code written by the American Society of Mechanical Engineers that governs and controls the types of materials...

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  • September 26, 2024
  • 17
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • DC BOILER
  • DC BOILER
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JOHNSON22
DC boilers final exam review 2024

Thexboilerxshownxinxthexillustrationxbelowxisxax___________________.x-
xANSWERxHorizontalxreturnxtubexboiler




"A",x"D"xandx"O"xtypexboilersxarexclassifiedxasx____________________xboilerxdesignsx-
xANSWERxwaterxtube




Thexfollowingxconsiderationsxmustxbextakenxintoxaccountxwhenxdesigningxaxboilerxexceptx__________
_______.x-xANSWERxUnresponsivextoxsuddenxsteamxdemands



ThexcodexwrittenxbyxthexAmericanxSocietyxofxMechanicalxEngineersxthatxgovernsxandxcontrolsxthextyp
esxofxmaterials,xmethodsxofxconstructionxandxproceduresxusedxinxthexinstallationxofxboilersxisxthex___
_________________.x-xANSWERxASMExcode



_______________________xconsistxofxthexallxpartsxofxthexboilerxwhichxarexexposedxonxonexsidextoxth
exgasesxofxcombustionxandxonxthexotherxsidextoxthexwaterxandxsteamxbeingxheated.x-
xANSWERxTotalxheatingxsurfacexarea




Howxmanyxpassesxarexshownxinxthexboilerxillustrationxbelow.x-xANSWERx1



Methodsxofxboilerxwaterxcirculationxincludex______________________.x-xANSWERxnaturalxandxforced



Advantagesxofxaxfirextubexboilerxincludexallxofxthexfollowingxexceptx_____________________________
______.x-
xANSWERxAxwaterxtubexboilerxhasxslowerxheatxtransferxratesxfromxthexhotxexhaustxgasesxtoxthexwater
xwhichxresultsxinxmorexrapidxchanges.

,Thex______________xisxthexhighestxpressurexinxpoundsxperxsquarexinchxatxwhichxaxboilerxcanxbexsafel
yxoperated.x-xANSWERxMAWP



Thexevaporationxofx34.5xlbsxofxwaterxperxhourxfromxfeedxwaterxatx212xF,xatxatmosphericxpressurexisx_
_____________________.x-xANSWERxonexboilerxhorsexpower



Thex______________xisxwherexthexcombustionxprocessxtakesxplacexwithinxthexboiler.x-
xANSWERxfurnace




Thexsaturatedxsteamxoutletxinxthexboilerxillustrationxbelowxisxidentifiedxbyxthexletter,x________.x-
xANSWERxe




Inxthexillustrationxbelow,xwhatxASMExLetterxcodexdesignatesxanxAMSExapprovedxpowerxboiler.xNote:xt
hexletterxinsidexthex"cloverleaf"xsymbol.x-xANSWERxS



Totalxheatingxsurfacesxonxaxboilerxincludex_____________________________________.x-
xANSWERxallxofxthexabove




Boilersxcanxbexclassifiedxbyxallxofxthexfollowingxmethodsxexceptx_______________.x-
xANSWERxallxofxthexabove




WhatxASMExLetterxcodexdesignatesxanxASMExapprovedxsafetyxvalvexdesign.xSeexillustrationxbelow.x-
xANSWERxv




Inxthexillustrationxbelow,xthexboilerxtubesxarexidentifiedxbyxthexletter,x_________.x-xANSWERxB



Axfirextubexboilerxthatxconsistxofxaxshellxthatxcontainsxtubexsheetsxandxisxmountedxaxfireboxxorxfurnac
exisxax__________________________.x-xANSWERxHRTxboiler

, Axboilerxdesignedxasxaxself-
containedxunit,xusuallyxinternallyxfiredxwithxmultiplexgasxpassesxandxoperatingxatxsteamxpressuresxupxt
ox250xpsixisxclassifiedxasxax_______________.x-xANSWERxPackagexfirextubexboiler



Axpowerxplantxthatxusesxthexhotxexhaustxgasesxfromxaxgasxturbinexenginextoxproducexsteamxforxusexin
xaxsteamxturbinextoxproducexadditionalxenergyxinxcalledxax_____________.x-
xANSWERxcombinedxcyclexpowerxplant




Withxregardxtoxmanholexandxhandholdxgaskets,xASMExCodexrequiresxthatxthexminimumxgasketxsurface
xwidthxbexnoxlessxthanx____________inchx,xwithxnoxgasketxthicknessxmorexthanx_______inchxwhenxco
mpressed.x-xANSWERx11/16",x1/4"



Whatxtypexofxboilerxisxshownxinxthexillustrationxbelow?x-
xANSWERxAx2xdrumxsinglexfurnacex"D"xtypexboilerxwithxhorizontalxsuperheater,xeconomizer,xwaterwall
sxandxdowncomers.



Whichxofxthexfollowingxstatementsxrepresentxthexmajorxdifferencexbetweenxaxboilerxdrumxandxaxboile
rxheader?x-xANSWERxthexsizexeachxeachxisxsignificantlyxdifferent



Onexfunctionxofxthexcomponentxlabeledx"C"xshownxinxthexbelowxillustrationxisxtox_________________
________.x-
xANSWERxdistributexthexwaterxtoxthexwatewallxtubesx&xprovidexaxcollectingxareaxforxsedimentxandxslu
dge



Thexwaterxorxmudxdrumxisxindicatedxinxthexillustrationxbelowxbyxthexletterx________________.x-
xANSWERxi




Thextubesxinxaxwaterxtubexboilerxthatxconnectxthexsteamxandxmudxdrumsxandxwho'sxprimaryxpurposex
isxtoxgeneratexsteamxfromxwaterxflowingxthroughxthemxisxknownxasxthex_____________xtubexbank.x-
xANSWERxgenerating

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