NACE CIP Level 2 Theory-Practical Questions with Correct Answers 2025

NACE CIP Level 2 Theory/Practical Questions
with Correct Answers 2025
DescribeBPassivationB-BCORRECTBANSWERB-
PassivationBisBtheBformationBofBaBprotectiveBoxideBfilmBonBtheBsurfaceBreducingBitsBchemicalBactivi
tyBandBitsBabilityBtoBcorrode.



DescribeBtheBfollowingBfactorsBandBhowBtheyBaffectBcorrosion:B-BCORRECTBANSWERB-
•BOxygen:BOxygenBincreasesBtheBrateBofBcorrosion.

•BTemperature:BCorrosionBusuallyBacceleratedBwithBincreasingBtemperature

•BChemicalBSalts:BIncreaseBtheBrateBofBcorrosionBbyBincreasingBtheBefficiencyBofBtheBelectrolyte.

•BHumidityB(orBWetness):BTheBwetterBtheBenvironment,BtheBmoreBcorrosionBisBlikelyBtoBoccur.

•BPollutantsBandBAcidBGases:BAcidBrain,BchemicalBbyproductsBandBchloridesBallBpromoteBcorrosion.



TwoBbroadBcategoriesBofBcorrosionBcanBbeBdescribedBas:B-BCORRECTBANSWERB-GeneralB

Localized



DescribeBGalvanicBCorrosionB-BCORRECTBANSWERB-
GalvanicBcorrosionBisBanBelectrochemicalBactionBofBtwoBdissimilarBmetalsBinBtheBpresenceBofBanBel
ectrolyteBandBanBelectronBconductiveBpath,BwhichBoccursBwhenBdissimilarBmetalsBcomeBintoBconta
ct.



DescribeBCathodicBProtectionB-BCORRECTBANSWERB-
CathodicBprotectionBisBtheBreductionBorBeliminationBofBcorrosionBbyBmakingBtheBstructureBtoBbeBpr
otectedBaBcathodeBbyBmeansBofBanBimpressedBcurrentBorBattachmentBtoBaBgalvanicBanode.



TheBtwoBprimaryBtypesBofBcathodicBprotectionBare:B-BCORRECTBANSWERB-ImpressedBCurrentB

GalvanicB(Sacrificial)

,ImpressedBcurrentBpowerBsourcesBinclude:B-BCORRECTBANSWERB-RectifiedBcommercialBpowerB

SolarBcellsB

GeneratorsB

FuelBcellsB

Wind-poweredBcellsB

ThermoelectricBcells



DescribeBCathodicBDisbondmentB-BCORRECTBANSWERB-
CathodicBdisbondmentBisBtheBseparationBofBtheBcoatingBfromBtheBsurfaceBthroughBhydroxylB(OH-
)BformationBdueBtoBincreasedB(madeBmoreBnegative)Bpotential.



TheBprincipalBcomponentBofBmildBcarbonBsteelBisB-BCORRECTBANSWERB-A.BIronB(Fe)



TheBformationBofBaBthinBsurfaceBlayerBonBmetals,BwhetherBanBoxide,Bcarbonate,BorBotherBcompou
nd,BthatBslowsBtheBrateBofBtheBcorrosionBprocessBisBcalled?B-BCORRECTBANSWERB-D.BPassivation



WhichBisBtheBpartBofBaBcorrosionBcellBwhereBmetalBdissolves?B-BCORRECTBANSWERB-A.BAnode



WhichBofBtheseBelementsBisBlikelyBtoBaccelerateBcorrosionBonBaBsteelBstructure?B-
BCORRECTBANSWERB-A.BSalts



C.BHighBtemperatures

D.BPollutants



InBaBcathodicBprotectionBsystemBtheBmetalBbeingBprotectedBisBthe?B-BCORRECTBANSWERB-
B.BCathode

,WhenBpartsBofBaBmetalBsurfaceBareBshieldedBfromBfullBexposureBtoBtheBenvironmentBbecauseBofBth
eBcloseBproximityBofBanotherBmetal,BcorrosionBatBthatBlocationBisBidentifiedBas?B-
BCORRECTBANSWERB-D.BCreviceBcorrosion




CathodicBprotectionBusingBimpressedBcurrentBisBmostBcommonlyBusedBon?B-BCORRECTBANSWERB-
C.BPipelines



ImpressedBcurrentBsystemsBanodesBinclude?B-BCORRECTBANSWERB-A.BGraphite

C.BHighBsiliconBcastBiron



DescribeBdehumidification:B-BCORRECTBANSWERB-
DehumidificationBisBtheBprocessBofBremovingBmoistureBvaporBfromBtheBairBtoBlowerBitsBdewBpoint.



WhenBplanningBenclosures,BtheBfollowingBminimumBrequirementsBshouldBbeBconsidered:B-
BCORRECTBANSWERB-•BMustBbeBlargeBenoughBtoBcontainBtheBwholeBworkBarea.



•BNotBbeBlargerBthanBtheBperformanceBcapabilitiesBofBtheBdehumidificationBequipment.

•BBeBsturdyBenoughBtoBholdBupBtoBintendedBworkBactivities,BpotentialBloads,BandBpossibleBincleme
nt

weather.

•BHaveBminimalBleakageBtoBmaintainBproperBenvironmentalBconditionsBandBensureBtheBdehumidifi
cation

systemBoperatesBefficiently.



DescribeBairBturnsB(airBchanges):B-BCORRECTBANSWERB-
•BTheBairBturnoverBprincipleBeliminatesBairBstratification,BorBlayering,BinBlargeBopenBspacesBby

recirculatingBtheBhotBairBthatBbecomesBtrappedBinBtheBhigherBspaces

•BTheBnumberBofBtimesBitBdoesBthisBperBhourBisBcalledBairBturns.

, AtBandBbelowBwhatBrelativeBhumidityBdoesBcorrosionBvirtuallyBcease?B-BCORRECTBANSWERB-0.4



DescribeBtwoBwaysBtoBreduceBtheBrelativeBhumidityBofBtheBboundaryBlayer:B-BCORRECTBANSWERB-
•BIncreaseBtheBsurfaceBtemperature

•BReduceBmoistureBcontentBbyBdehumidification.



TypesBofBdehumidificationBequipmentBinclude:B-BCORRECTBANSWERB-
•BRefrigerationBandBdesiccant



DescribeBseveralBbenefitsBofBdehumidification:B-BCORRECTBANSWERB-
•BDriesBtheBair.BLowersBtheBdewBpoint.BPermitsBblastingBtheBentireBsurface.BHoldsBtheBblastBwithBdr
yBair.BHelpsBinBcleaningBtheBsurface.BHoldsBtheBsurfaceBduringBcoatingBapplication.



YouBareBtheBcoatingBinspectorBonBaBprojectBwithBdehumidificationBprovidedBbyBaBrotatingBbedBtyp
eBdehumidifier.BTheBsilicaBgelBhasBbecomeBcontaminated.BWhatBdoByouBexpectBtoBhappenBwithBth
eBsilicaBgel?B-BCORRECTBANSWERB-D.BItBcanBnoBlongerBadsorbBmoisture



WhatBeffectBdoesBtheBrotatingBbedBdehumidifierBhaveBonBtheBtreatedBambientBair?B-
BCORRECTBANSWERB-B.BItBisBheatedBandBtheBhumidityBdecreases




SomeBgeneralBbasicBcentrifugalBblastBsetupsBinclude:B-BCORRECTBANSWERB-TumblingBMillB

MultiBTableB

PlainBTableB

SwingBTableB

CustomBdesignedBsystems



CentrifugalBblastingBconveyorBsystemsBareBcommonlyBusedBforBcleaningBof:B-BCORRECTBANSWERB-
PlateB