GRADE 2 WASTEWATER EXAM PRACTICE QUESTIONS AND CORRECT ANSWERS

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GRADE 2 WASTEWATER EXAM PRACTICE QUESTIONS AND CORRECT ANSWERS

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2025/2026

Institution WASTE WATER CLASS B

Course WASTE WATER CLASS B

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GRADE 2 WASTEWATER EXAM PRACTICE QUESTIONS AND CORRECT ANSWERS

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GRADE 2 WASTEWATER EXAM
PRACTICE QUESTIONS AND CORRECT
ANSWERS

whenA2testingA2forA2phosphorousA2whichA2zoneA2hasA2theA2leastA2amount?A2-A2Ans--
endA2ofA2aerobicA2zone

whatA2isA2theA2standardA2sampleA2volumeA2forA2BOD5?A2-A2Ans--300A2ML

whatA2isA2theA2bestA2valveA2forA2aA2limeA2slurryA2line?A2-A2Ans--GateA2valve

WhatA2isA2theA2bestA2valveA2toA2throttleA2flow?A2-A2Ans--ButterflyA2valve

WhatA2partA2ofA2theA2pumpA2doesntA2move?A2-A2Ans--Stator

organicA2loadA2isA2rising,A2whatA2shouldA2youA2do?A2-A2Ans--
ReduceA2theA2WASA2rateA2byA2anA2amountA2lessA2thanA210%A2aA2day.

WhatA2doesA2TKNA2composeA2of?A2-A2Ans--organicA2nitrogenA2andA2ammoniaA2nitrogen

WhatA2isA2theA2firstA2testA2thatA2shouldA2beA2ranA2onA2aA2compositeA2sample?A2-A2Ans--
dissolvedA2oxygenA2orA2CBOD

AlarmA2systemA2hasA2beenA2repairedA2butA2lightA2isntA2working?A2-A2Ans--
checkA2systemA2overA2again.

WhenA2checkingA2chainsA2andA2sprocketsA2duringA2roundsA2-A2Ans--checkA2covers/
enclosed

whatA2pipeA2isA2usedA2forA2chlorineA2gasA2orA2liquid?A2-A2Ans--PVC

SuctionA2liftA2pressureA2canA2beA2measuredA2by?A2-A2Ans--
theA2centerA2lineA2ofA2theA2hydraulicA2partA2ofA2theA2pumpA2downA2toA2theA2waterA2surface
A2onA2theA2suctionA2sideA2ofA2theA2pump.

WhatA2doesA2vectorA2meanA2forA2biosolids?A2-A2Ans--
organisms,A2suchA2asA2rodentsA2andA2insects,A2thatA2canA2spreadA2diseaseA2byA2carrying
A2andA2transferringA2pathogens.

calciumA2hypochloriteA2presentsA2aA2combustionA2hazardA2inA2theA2presenceA2of?A2-
A2Ans--grease

, ifA2TKNA2isA27.14A2whatA2isA2theA2returnA2ratio?A2-A2Ans--3.57A2isA2half

selectingA2aA2lubricatingA2oil?A2-A2Ans--serviceA2factor

sulfuricA2acidA2chemicalA2formula?A2-A2Ans--H2SO4

MostA2commonA2typeA2ofA2activatedA2sludgeA2plant?A2-A2Ans--ExtendedA2aeration

centrifugalA2pumpA2spinningA2backwards?A2-A2Ans--CheckA2Valve

WhyA2isA2PHA2downA2inA2anA2aerobicA2digestor?A2-A2Ans--
OxidationA2ofA2hydrogenA2sulfideA2willA2turnA2intoA2sulfuricA2acid

WhatA2isA2usedA2forA2dechlorination?A2-A2Ans--sulfurA2dioxide

whiteA2spotsA2onA2RBC?A2-A2Ans--SulfurA2Bacteria

HowA2doA2youA2increaseA2flushingA2forA2tricklingA2filter?A2-A2Ans--RecycleA2flow

DiseaseA2outbreakA2atA2aA2collegeA2hasA2aA2kitchenA2sinkA2hoseA2connectedA2toA2waterA2
source?A2-A2Ans--BackA2Siphon

WhichA2typeA2ofA2ActivatedA2SludgeA2canA2bestA2handleA2shockA2load?A2-A2Ans--
StepA2Feed

LargeA2clumpsA2ofA2risingA2sludgeA2onA2theA2surfaceA2ofA2aA2secondaryA2clarifierA2areA2typ
icallyA2causedA2by?A2-A2Ans--denitrification

HowA2doA2youA2transferA2andA2storeA21A2TonA2chlorineA2container?A2-A2Ans--
TransferA2horizontallyA2andA2storeA2horizontally

WetA2wellA2thatA2isA2oversizedA2forA2communityA2isA2sendingA2blackA2sludgeA2everyA2morn
ing?A2-A2Ans--DecreaseA2distanceA2betweenA2onA2andA2offA2forA2floats

HowA2doA2youA2cleanA2aA2polymerA2spill?A2-A2Ans--HouseholdA2bleach

LiquidA2levelA2inA2wetA2wellA2isA2high,A2howA2doesA2itA2affectA2submersibleA2pumpA2flow?
A2-A2Ans--increasesA2flow

HealthyA2sludgeA2indicatorA2organism?A2-A2Ans--Metazoa

whatA2determinesA2theA2sizeA2ofA2chlorineA2injector?A2-A2Ans--waterA2pressure

whiteA2billowingA2stiffA2foam?A2-A2Ans--YoungA2sludge

DarkA2thickA2foamA2-A2Ans--ExcessiveA2solids/A2oldA2sludgeA2age

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