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Air ejectors and DC heaters comprehensive exam 2024

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Air ejectors and DC heaters comprehensive exam 2024 The DC Heater functions to __________. a. store, heat, and deaerate feed water b. chemically treat feed water to remove carbonic gas c. ensure recirculation in the feed water system d. remove the major amount of non-condensable gases from the main condenser A If the DC heater relief valve lifts frequently, the cause can be excessive __________. a. condensate supplied to the DC heater b. auxiliary exhaust steam pressure c. feed water recirculated from the feed pump d. makeup feed introduced to the system B If the boiler water and condenser hot well levels are normal, but the DC heater level is only 30% of full, you should __________. a. increase the speed of the condensate pump b. open the feed pump recirculating valve wide c. open the makeup feed d. bypass the vent condenser and third-stage feed heater C

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Air ejectors and DC heaters
comprehensive exam 2024

WithXtheXsteamXcontrolXvalveXwideXopenXduringXnormalXoperation,XtheXrateXofXsteamXflowXfromXthe
XauxiliaryXexhaustXsteamXlineXtoXtheXDCXheaterXisXactuallyXaXfunctionXofX__________.


a.XrateXofXcondensationXinXtheXDCXheaterX

b.XspringXpressureXofXtheXsprayXvalves

c.XwaterXlevelXinXtheXDCXheaterXreservoirX

d.XrateXofXevaporationXinXtheXDCXheaterX-XANSWERXA



InXorderXtoXtestXtheXliftingXpressureXofXtheXdeaeratingXfeedXheaterXreliefXvalve,XyouXwouldX________
__.

I.XcloseXtheXauxiliaryXexhaustXdumpXvalveXtoXtheXmainXandXauxiliaryXcondensers

II.XincreaseXtheXsetXpointXofXtheXmake-upXsteamXregulatorXtoXtheXauxiliaryXexhaustXsystem

a.XIXonly

b.XIIXonly

c.XBothXIXandXIIX

d.XNeitherXIXnorXIIX-XANSWERXC



TheXDCXHeaterXfunctionsXtoX__________.

a.Xstore,Xheat,XandXdeaerateXfeedXwater

b.XchemicallyXtreatXfeedXwaterXtoXremoveXcarbonicXgas

c.XensureXrecirculationXinXtheXfeedXwaterXsystem

d.XremoveXtheXmajorXamountXofXnon-condensableXgasesXfromXtheXmainXcondenserX-XANSWERXA

, IfXtheXDCXheaterXreliefXvalveXliftsXfrequently,XtheXcauseXcanXbeXexcessiveX__________.

a.XcondensateXsuppliedXtoXtheXDCXheater

b.XauxiliaryXexhaustXsteamXpressure

c.XfeedXwaterXrecirculatedXfromXtheXfeedXpumpX

d.XmakeupXfeedXintroducedXtoXtheXsystemX-XANSWERXB



IfXtheXboilerXwaterXandXcondenserXhotXwellXlevelsXareXnormal,XbutXtheXDCXheaterXlevelXisXonlyX30%X
ofXfull,XyouXshouldX__________.

a.XincreaseXtheXspeedXofXtheXcondensateXpump

b.XopenXtheXfeedXpumpXrecirculatingXvalveXwide

c.XopenXtheXmakeupXfeed

d.XbypassXtheXventXcondenserXandXthird-stageXfeedXheaterX-XANSWERXC



CondensateXisXpumpedXfromXtheXcondenserXtoXtheXDCXheaterXinsteadXofXdirectlyXtoXtheXboilerXbecau
seX__________.

a.XboilerXfeedXpumpsXmustXoperateXwithXaXnegativeXsuctionXhead

b.XsuspendedXsolidsXinXtheXcondensateXmustXbeXeliminated

c.XcondensateXshouldXbeXdeaeratedXbeforeXenteringXtheXboiler

d.XcondensateXatXcondensingXtemperatureXisXtooXhotXandXwillXcauseXthermalXstressXinXtheXboilerX-
XANSWERXC




IfXtheXboilerXwaterXlevelXisXnormal,XtheXmainXcondenserXhotXwellXlevelXisXnormal,XandXtheXDCXheater
XlevelXisX40%Xfull,XyouXshouldX__________.


a.XprimeXtheXcondensateXpump

b.XbypassXtheXventXcondenser

c.XslowXtheXmainXunit

d.XopenXtheXmakeupXfeedXvacuumXdragXlineX-XANSWERXD

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  • air ejectors and dc heaters comprehensive exam 202
  • with the steam control valve wide open during norm
  • in order to test the lifting pressure of the deaer

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