CLASS D WASTEWATER LICENSE PRACTICE QUESTIONS AND CORRECT ANSWERS

CLASS D WASTEWATER LICENSE
PRACTICE QUESTIONS AND
CORRECT ANSWERS
TheA2nameA2ofA2theA2stateA2agencyA2responsibleA2forA2enforcingA2pollutionA2controlA2laws
A2inA2TexasA2isA2-A2Ans--TCEQ


TheA2termA2"pathogen"A2meansA2-A2Ans--DiseaseA2causing

TheA2minimumA2separationA2betweenA2sewerA2linesA2andA2potableA2waterA2linesA2isA2-
A2Ans--9A2feet


AA2licensedA2wastewaterA2operatorA2isA2aA2professionalA2whoA2-A2Ans--
consistentlyA2doesA2bestA2jobA2possible,A2practicesA2personalA2safety,A2strivesA2toA2impro
veA2jobA2knowledge,A2strivesA2toA2keepA2theA2plantA2andA2collectionA2systemA2inA2theA2bes
tA2appearanceA2andA2workingA2order

TheA2BiochemicalA2OxygenA2DemandA2(BOD)A2ofA2aA2sampleA2isA2basedA2onA2-A2Ans--
MeasuringA2theA2dissolvedA2oxygenA2(DO)A2used

WhatA2isA2theA2mostA2importantA2roleA2ofA2aerobicA2bacteriaA2inA2theA2treatmentA2ofA2wast
ewaterA2-A2Ans--decomposeA2organicA2matter

NameA2someA2dangerousA2gasesA2thatA2areA2likelyA2toA2beA2presentA2inA2liftA2stationsA2an
d/orA2manholesA2-A2Ans--
MethaneA2gas,A2petroleumA2fumes,A2hydrogenA2sulfide,A2andA2carbonA2dioxide

AA2preferredA2andA2mostA2commonA2methodA2ofA2cleaningA2sewerA2linesA2isA2-A2Ans--
HydroA2jetA2cleaner

WhatA2areA2someA2waysA2toA2reduceA2badA2odorsA2comingA2fromA2aA2collectionA2systemA2
-A2Ans--RoutinelyA2cleaningA2slowA2runningA2orA2lowA2flowA2lines.
AddingA2ChlorineA2orA2hydrogenA2peroxideA2toA2theA2collectionA2system.

TheA2resultsA2ofA2aA2BiochemicalA2OxygenA2DemandA2(BOD)A2sampleA2takenA2atA2aA2trea
tmentA2plantA2tellsA2theA2operatorA2-A2Ans--
HowA2theA2plantA2wasA2operatingA25A2daysA2ago

WhatA2areA2someA2factorsA2thatA2wouldA2contributeA2toA2infiltrationA2inA2aA2collectionA2syst
emA2-A2Ans--BreaksA2inA2theA2mainA2lines,A2highA2groundA2waterA2levels,A2heavyA2rains

, WhenA2aA2centrifugalA2pumpA2losesA2prime,A2whatA2isA2mostA2likelyA2toA2resultA2-A2Ans--
PumpA2isA2noA2longerA2movingA2liquid

PointA2sourceA2dischargesA2areA2-A2Ans--
dischargesA2thatA2comeA2fromA2pipesA2orA2ditchesA2thatA2areA2monitored,A2controlledA2an
dA2inspected

AnA2operatorA2wouldA2anticipateA2wasteA2flowsA2fromA2DomesticA2sourcesA2toA2averageA2
-A2Ans--100A2gallonsA2perA2personA2perA2day

TheA2wastewaterA2plantA2operatorA2isA2primarilyA2responsibleA2forA2-A2Ans--
treatingA2wastewaterA2dischargedA2from/toA2theA2community

Non-pointA2sourceA2dischargesA2areA2-A2Ans--
dischargesA2thatA2haveA2intermittent,A2dispersedA2flowsA2havingA2littleA2orA2noA2control

TheA2TexasA2CommissionA2onA2EnvironmentalA2QualityA2canA2revokeA2anA2operator'sA2lic
enseA2ifA2theA2operatorA2-A2Ans--
CausesA2aA2permitA2violation,A2falsifiesA2records,A2orA2neglectsA2theirA2duty

IfA2anA2accidentalA2discharge,A2bypass,A2orA2spillA2(SSO)A2ofA2wastewaterA2occursA2theA2r
esponsibleA2partyA2MUSTA2notifyA2TCEQA2regionalA2officesA2withinA2-A2Ans--24A2hours

AerobicA2bacteriaA2requireA2__________A2inA2theA2waterA2forA2theirA2metabolismA2-
A2Ans--Oxygen


ChemicalA2characteristicsA2ofA2sewageA2includeA2-A2Ans--
solids,A2grease,A2dissolvedA2oxygen,A2O2A2Demand,A2pH,A2andA2gases

AnaerobicA2bacteriaA2requireA2________A2inA2theA2waterA2forA2theirA2metabolismA2-
A2Ans--CannotA2liveA2withA2O2A2present


________A2removesA2TotalA2SuspendedA2SolidsA2(TSS)A2-A2Ans--Sedimentation

FacultativeA2bacteriaA2requireA2________A2inA2theA2waterA2forA2theirA2metabolismA2-
A2Ans--eitherA2aerobicA2orA2anaerobicA2conditions


InorganicA2solidsA2includeA2-A2Ans--Sand,A2grit,A2andA2minerals

AA2goodA2pHA2forA2plantA2influentA2isA2aboutA2-A2Ans--7.2

DissolvedA2solidsA2inA2waterA2-A2Ans--PassA2throughA2aA2filter

TheA2anaerobicA2decompositionA2ofA2organicA2matterA2producesA2-A2Ans--
CarbonA2monoxideA2gas,A2hydrogenA2sulfideA2gas,A2methaneA2gas