WI DNR WASTEWATER OPERATOR CERTIFICATION (GENERAL) QUESTIONS AND CORRECT ANSWERS

WI DNR WASTEWATER OPERATOR
CERTIFICATION (GENERAL) QUESTIONS
AND CORRECT ANSWERS

WhichA2providesA2aA2betterA2compositeA2representative:

A.A2AA2smallerA2sampleA2collectedA2moreA2often
B.A2AA2largerA2sampleA2collectedA2lessA2oftenA2-A2Ans--
AA2smallerA2sampleA2collectedA2moreA2often

WhichA2partA2ofA2theA2treatmentA2processA2usesA2biologicalA2processes?
A:A2Primary
B:A2Secondary
C:A2Tertiary
D:A2WASA2-A2Ans--Secondary

TheA2activatedA2sludgeA2(bioA2mass)A2collectedA2inA2theA2finalA2clarifierA2andA2returnedA2t
oA2theA2secondaryA2treatmentA2processA2toA2mixA2withA2theA2incomingA2wastewaterA2is:
A:A2MixedA2LiquorA2SuspendedA2SolidsA2(MLSS)
B:A2WasteA2ActivatedA2SludgeA2(WAS)
C:A2ReturnA2ActivatedA2SludgeA2(RAS)
D:A2MixedA2LiquorA2VolatileA2SuspendedA2SolidsA2(MLSS)A2-A2Ans--
ReturnA2ActivatedA2SludgeA2(RAS)

DefineA2primaryA2treatmentA2-A2Ans--
ClarificationA2byA2solidA2andA2liquidA2separationA2thatA2removesA2aA2substantialA2amountA
2ofA2suspendedA2andA2floatingA2matter.


TrueA2orA2False:A2DisinfectionA2destroysA2allA2microorganisms?A2-A2Ans--False

WhatA2typeA2ofA2solidsA2doesA2aA2clarifierA2remove?A2-A2Ans--FloatingA2andA2settled

DefineA2F:MA2usingA2BODA2andA2MLSSA2-A2Ans--
F:MA2isA2theA2food:microorganismA2ratioA2whereA2theA2'food'A2isA2BODA2andA2theA2microor
ganismsA2areA2theA2MLSS/MLVSS.

WhatA2isA2aA2restrictionA2inA2anA2openA2channelA2usedA2toA2measureA2flow?
A:A2Weir
B:A2BoxA2cord
C:A2Packing
D:A2FlumeA2-A2Ans--Flume

, WhatA2isA2aA2selector?A2-A2Ans--
PartA2ofA2theA2treatmentA2systemA2thatA2selectsA2aA2specificA2typeA2ofA2organismA2byA2pro
vidingA2anA2environmentA2(Anaerobic,A2anoxic,A2orA2aerobic)A2thatA2favorsA2itsA2growth.

_____A2areA2flowsA2generatedA2withinA2theA2plant,A2usuallyA2fromA2solidsA2processingA2th
atA2hasA2beenA2recycledA2backA2throughA2theA2plant.A2-A2Ans--Sidestreams

_____A2isA2theA2treatmentA2processA2thatA2usesA2physical,A2chemical,A2orA2biologicalA2pro
cessesA2toA2removeA2suspendedA2solidsA2andA2nutrientsA2inA2wastewaterA2toA2accomplis
hA2aA2levelA2ofA2treatmentA2greaterA2thanA2whatA2canA2beA2accomplishedA2byA2secondaryA
2treatment.
A:A2PrimaryA2treatment
B:A2Disinfection
C:A2TertiaryA2treatment
D:A2SourA2treatmentA2-A2Ans--TertiaryA2treatment

TheA2activatedA2sludgeA2(exceptA2biomassA2orA2cellA2mass)A2removedA2fromA2theA2secon
daryA2treatmentA2process.A2
A:A2MixedA2LiquorA2SuspendedA2SolidsA2(MLSS)
B:A2WasteA2ActivatedA2SludgeA2(WAS)
C:A2ReturnA2ActivatedA2SludgeA2(RAS)
D:A2MixedA2LiquorA2VolatileA2SuspendedA2SolidsA2(MLSS)A2-A2Ans--
WasteA2ActivatedA2SludgeA2(WAS)

WhatA2areA2theA2twoA2mainA2reasonsA2forA2treatingA2wastewater?A2-A2Ans--
ToA2protectA2publicA2healthA2byA2destroyingA2pathogensA2andA2toA2protectA2theA2environm
entA2byA2removingA2pollutants.

DiscussA2theA2effectA2ofA2I&IA2onA2aA2collectionA2systemA2-A2Ans--
(1)ExceedA2capacityA2ofA2theA2pipesA2=A2sanitaryA2sewerA2overflowsA2(SSO).A2

(2)A2VeryA2highA2flowsA2enteringA2theA2treatmentA2facilityA2canA2leadA2toA2tooA2muchA2flow
A2goingA2throughA2aerationA2basinsA2andA2clarifiersA2washingA2outA2solids,A2creatingA2aA2l
ossA2ofA2treatmentA2efficiency

AA2structureA2thatA2allowsA2aA2pipeA2toA2dipA2belowA2anA2obstructionA2byA2formingA2aA2"U"A
2shapedA2path.A2LiquidA2flowingA2inA2oneA2endA2isA2forcedA2upA2andA2outA2theA2over.A2ItA2is
A2typicallyA2usedA2inA2collectionsA2whenA2thereA2isA2aA2riverA2orA2otherA2deepA2obstruction
s.

A:A2GateA2ValveA2Structure
B:A2TorqueA2Wrench
C:A2Pathfinder
D:A2InvertedA2SiphonA2-A2Ans--InvertedA2Siphon

FillA2inA2theA2generalA2characteristicsA2forA2domesticA2wastewater:A2(mg/L)