Wastewater Treatment Class B Texas Questions and Answers, Exams of Advanced Education

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Wastewater Class B Texas Questions And

Answers Graded A+ 2024.

The name of the State Agency responsible for enforcing pollution control laws in Texas - correct answer. Texas Commission of Environmental Quality The term pathogenic means - correct answer. Capable of causing disease The minimum separation between sewer lines and potable water lines is - correct answer. 9 feet A licensed wastewater operator is a professional - correct answer. consistently does best job possible, practices personal safety, strives to improve job knowledge, strives to keep the plant and collection system in the best appearance and working order An important step in testing a sample for Total Suspended Solids is - correct answer.Filtering a sample

The Biochemical oxygen Demand (BOD) of a sample is based on - correct answer. Measuring the dissolved oxygen (DO) used The results of Biochemical Oxygen Demand (BOD) sample taken at a treatment plant tells the operator - correct answer. How the plant was operating 5 days ago Which of the following are dangerous gasses that are likely to be present in lift stations and manholes? - correct answer.carbon dioxide Natural gas, gasoline fumes, hydrogen sulfide and

A preferred hydraulic method of cleaning sewer lines is - correct answer. Hydro Jet Cleaner

Ways to reduce bad odors coming from a collection system - correct answer. routinely cleaning slow running or low flow lines, adding chlorine or hydrogen peroxide to the collection system Types of pipe that are commonly used in wastewater collection system - correct answer. ductile iron, Poly Vinyl Chloride (PVC) Before entering a confined space a worker should - correct answer.monitoring device and check for the presence of dangerous gasses, ventilate the space Use approved with a blower, wear a safety harness and attach a life line A properly designed and operated primary sedimentation tank should remove _____ percent of incoming BOD - correct answer. 30-40% Devices that may be used to determine the level of sewage in a lift station - correct answer. air bubbler, floats, electrodes, Acoustic (sonic) What is the most important role of aerobic bacteria in the treatment of wastewater? -correct answer. decompose organic matter

The hydraulic loading of a trickling filter may be determined by - correct answer. flow rate and filter area These can be used to dewater sludge - correct answer. belt press, drying beds, solid bowl centrifuge, gravity thickener Most important to providing adequate sewage treatment in a stabilization pond - correct answer. sunlight, algae, bacteria and time Offensive and objectionable odors which sometimes occur in trickling filters usually indicate - correct answer. septic conditions are present Dissolved Oxygen (DO) in aeration tank of an activated sludge plant should be maintained at or about - correct answer. 2 to 4 mg/L Contributes to the infiltration in a collection system - correct answer. breaks in the main lines, high ground water levels, heavy rains, hydro jet cleaning plugged mains When a centrifuge pump loses prime the - correct answer.liquid pump is no longer moving

A Rotating Biological Contactor (RBC) is - correct answer. fixed firm biological treatment process Needs to be checked regularly to properly operate an activated sludge treatment plant - correct answer. aeration equipment and mixed liquor solids

Point source discharges are - correct answer. discharges that come from pipes or ditches that are monitored, controlled and inspected Non-point discharges are - correct answer. discharges that have intermittent, dispersed flows having little or no control The Texas Water Code establishes the protection of water quality and quantity of thestate by - correct answer. setting stream standards, issues permits for discharges, identifies non-point source controls, and establishes water reuse. The wastewater plant operator is primarily responsible for - correct answer. treating wastewater discharged into the community Chapter ___ of the Texas Water Code is the state law controlling water pollution and ___ authority to control discharges in Texas - correct answer. Chapter 26 and Texas Commission of Environmental Quality The Texas Commission on Environmental Quality can revoke an operator's license if the operator - correct answer. causes permit violation, falsifies records or neglects their duty If accidental discharge, bypass, or spill (SSO) of wastewater occurs the responsibleparty MUST notify TCEQ regional offices within ____ hours - correct answer. 24

Aerobic Bacteria require_____ in the water for their metabolism - correct answer. oxygen Anaerobic Bacteria _____ live with O2 present in the water for their metabolism -correct answer. cannot

Facultative Bacteria require__________in the water for their metabolism - correct answer. either aerobic or anaerobic conditions Chemical characteristics of sewage include - correct answer. solids, greases, dissolved oxygen, O2 Demand, pH, and gasses _________removes Total Suspended Solids (TSS) - correct answer. filtration Inorganic solids include - correct answer. sand, grit and minerals Organic solids include - correct answer. organic materials from plants, animals or humans A good plant influent pH is about - correct answer. 7.

Dangerous gases are produced during bacterial decomposition of organics in wastewater. The main gasses are - correct answer. Hydrogen sulfide, carbon dioxide and methane The majority of Dissolved Oxygen in raw sewage comes from - correct answer. Potable Drinking Water Each person contributes approximately ______ lbs of BOD to the system daily. -correct answer. 0.

Sources of waste water include - correct answer. domestic, storm water, commercial, food processing, agricultural and industrial A sewer manhole provides access into the system for cleaning or service. A manhole is located - correct answer. at changes in alignment, diameter, grade, direction and intersection New baccess bmanholes bmust bbe bmust bat bleast bhave b____inches. ban binside bdiameter b- b bcorrect bof banswer. bat bleast b b b b______ 4 bfeet b (^) andbfeet b b 24 and binches bthe bentry

In bthe bpast b____ bwas bused bto bconstruct bmanholes. bThis bproduct bis bprohibited bfor bconstruction bor bgrading btoday b- b bcorrect banswer. b b bbrick band bmortar Verified bclay band bPoly bVinyl bChloride b(PVC) bare bthe bmost bcommon bpipe bmaterials bused bfor bsewer blines bbut bother bmaterials bare bavailable bsuch bas b- b bcorrect banswer. b b bductile biron, bcast biron, bacrylontrile bbutadiene bstyrene b(ABS) bConcrete, bpolyethylene b& basbestos bconcrete Whenever bused b- b bcorrect bwastewater banswer. bcannot b b bgravity/ bflow blift bto b (^) stationbthe btreatment bplant bby b_____ ba b_____ bis btypically

The bprimary bcause bof bstoppage bin ba bcollection bsystem bis b_____ band b_____ b- b bcorrect banswer. b b bgrease/roots The b_____pump bis bmost bcommonly bused bin ba blift bstation b- b bcorrect banswer. b b bcentrifugal A bcentrifugal bpump bmust bbe b____ bor bit bwill bnot bpump b- b bcorrect banswer. b b bprimed ______bHydrogen bgas bSulifide/smell bis bvery btoxic band bdeadens bthe bsense bof b______ b- b bcorrect banswer. b b

______ bgas bis bcolorless, bodorless band bheavier bthan bair b- b bcorrect banswer. b b bMethane ______ bmicroorganisms bare bthe bsmallest b- b bcorrect b, b mostbanswer. bnumerous, b b bbacteria band bmost bimportant bof bthe bactivated bsludge

Organic bloading brefers bto bthe bpounds bper bday bof b____ bper bacre bfeet bor b1,000 bcubic bfeet bof bfilter bmedia b- b bcorrect banswer. b b bBOD Hydraulic bloading brefers bto bthe bvolume bof b____, bincluding brecirculation, bapplied bto bthe bfilter b- b bcorrect banswer. b b bwater The bmost bcommon btype(s) bof btrickling bfilters bare- b- b bcorrect banswer. b b bStandard brate b(1- 4 bmgd) band bHigh bRate b(10-40 bmgd) Odors boccur bwhen btreatment bbecomes b- b bcorrect banswer. b b banaerobic ____________gas bis bgreenish-yellow, bpungent, bheaver bthan bair band bhighly btoxic b- b bcorrect banswer. b b bchlorine One bcommon btype bof bweir bdesign bfor bmeasuring bflow bis b- b bcorrect banswer. b b bV-Knotch Inflow band bInfiltration b(I&I) btypically brefers bto b- b bcorrect banswer. b b bunaccounted bfor bwater bin bthe bsystem bafter bheavy brains If bthe b____ bloading bon bthe bplant bis bhigh, bthe boperator bwould bneed bto b____Dissolved bOxygen b(DO) blevels. b- b bcorrect banswer. b b bOrganic/Increase A bsettling bsimple btest bmethod bfor bindicating bwhen bto bwaste bsludge bis b- b bcorrect banswer. b b b 30 bminute

Organic bloading bof ba bstabilization bpond bis babout b____ bpounds bof bBOD/acre/day bwith ba bdetention btime bof bat bleast b___ bdays. b- b bcorrect banswer. b b b 35 bBOD/ b 30 bDays Anaerobic bcan bbe bused bdigesters bto bkeep bare bthe bcovered bdigester bto bwarm. bkeep bb-out b bcorrect b____, b banswer.and bto btrap b b bfree buseful boxygen bmethane bwhich

Unstable banareobic bsludge bcontains bstreaks bof b_________ bor b________. b- b bcorrect banswer. b b bgray/green Aerobic bdigestion bis ban b____process bwhereby bthe baerobic bbacteria bconsume bthemselves b- b bcorrect banswer. b b bEndogenous Approved bdisposal bmethods bfor bdigested, bdewatered, bsludge's bare blandfill, b____ band b____. b- b bcorrect banswer. b b bIncineration b& bLand bApplication Landfill bapplied bsludge bmust bhave ba bsolids bcontent bof bat bleast b_________percent b- b bcorrect banswer. b b b 20 Calcium b- b bcorrect bHypochlorite banswer. b b bOxidizer/Oil b(HTH) bis ba b b&strong bHydrocarbons b_______ band breacts bviolently bwith b_________.

When badded bto bwater bchlorine bforms b_____&_______acid b- b bcorrect banswer. b b bHydrochlorous band bHydrochloric When bammonia bis bpresent bin bwastewater band breacts bwith bchlorine_________are bformed b- b bcorrect banswer. b b bChloramines Effluent bdosage bof bchlorine bin bthe bcontact bchamber bmust bproduce ba btotal bcombined bresidual bof b- b bcorrect banswer. b b b1.0 bmg/L bafter b 20 bminutes Besides bdisinfection, bchlorine bhas bother buses bat bthe bwastewater btreatment bplant bsuch bas b- b bcorrect banswer. b b bReduces bBOD, bOdor, bAlgae bgrowth, bHelps bwith bGrease TCEQbIrrigation, ballows baquifer bthe b breuserecharge, bof bwastewater, bcooling btowers bsome band bof bbfirethese bprotection binclude b- b bcorrect banswer. b b

All breclaimed bwater bpiping bmust bbe b_______in bcolor b- b bcorrect banswer. b b bpurple Before band b________the bentering ba b manholebmanhole b thebbefore boperator bentering. bshould b- b b (^) correctbtest bfor banswer. b________and b b ball bhazardous boxygen blevels bgasses band bventilate When ba bmunicipal bwastewater beffluent bhas ba bhigh bnitrate blevel band blow bammonia blevel b bthisaerobic bmost btreatment blikely bmeans b- b bcorrect banswer. b b bthe beffluent bhas breceived ba bhigh bdegree bof

Total bsolids bin bwastewater bare bthe bsum bof b- b bcorrect banswer. b b bSettleable band bvolatile bsolids This braw bbwastewatertreatment bdevice b- b bcorrect bis bcommonly banswer. b b bbusedA bMechanically bto bseparate b brakedand bremove bbar bscreen blarge bsolids bfrom

___________would bhave ban badverse beffect bon bthe bproper bsettling bof bsolids bin ba bclarifier. b- b bcorrect banswer. b b bA bshort bcircuiting bflow bpattern This btest bwould bgive bthe bbest binformation bon bhow befficiently ba btrickling bfilter bwas boperating b- b bcorrect banswer. b b bPercent bBOD bRemoval This btrickling bfilter bproblem bcould bbe breduced bby bincreasing bthe brecirculation bratio b- b bcorrect banswer. b b bFilter bfiles What bgases bare bproduced bby bthe bcontrolled banaerobic bdigestion bof bwastewater bsludge's b- b bcorrect banswer. b b bMethane b& bCarbon bDioxide These bwastewater bdiseases b- b bcorrect bare bcaused banswer. bby b b b bpathogenicHepatitis, b (^) typhoid,borganisms bparatyphoid,dysentery, bthat bmay bbe bpresent b (^) cholera,bin braw bgastroenteritis, bpolio, bhookworm band bgiardiasis

During bheavy brain bit bis bpossible bthat bmanholes band blift bstations bmay boverflow, b bdischargewould bbe b b-waste b bcorrect bmaterials banswer. binto b b bconsidered broadways bboran b ditches.bunavoidable bThis bbdischarge,type bof bdischarge ba bviolation b(SSO) bof bthe bTexas bWater bCode, ba bbypass bthat bmust bbe breported bwithin b 24 bhours band bconsidered ba bhealth bhazard An bpathogenic beffective b borganismway bfor bthe bis (^) bbcollectionto b- b bcorrect bsystem banswer. bworker b b bWear bto bprevent bprotective binfection bclothing bby b (^) andbwaterborn bavoid bdirect bcontact bwith bwaste bwater _________will bincrease bthe bchances bthat bsewage bwill bturn bseptic b- b bcorrect banswer. b b bStoppages bin bthe bmain bline Extensive buse bof bgarbage bdisposals b(grinders) bin ba bcommunity bwould blikely bhave bthe bfollowing beffect bon bthe bcollection bsystem b- b bcorrect banswer. b b bIncrease bthe bamount bof bflow, bsolids, band bgrease The bminimum bsize bfor ba bgravity bflow bsewer bline bon bcity bright-of-way band bthe bminimum bgrade bis b- b bcorrect banswer. b b b 6 binch band ba bgrade bof b0.50 bpercent The bmost baccurate bway bto bfind bthe baverage bwastewater bflow brate bin ban bexisting b10-inch b bsewerdata bmain bis b- b bcorrect banswer. b b bObtaining bactual bflow bdata b& bverifying bwith bfield

What bis bthe bgreatest badvantage bfor busing bfiberglass bmanholes bin bareas bwith bhigh bgroundwater? b- b bcorrect banswer. b b bfiberglass bis bnot bsubject bto binfiltration A bpressure b__________ bsewer bpump bmain. bwould b- b bcorrect bmost banswer. blikely bbe b b b busedCentrifugal bwhen bdischarging binto ba b10" bdiameter

Excessive bpower bconsumption bby ba bpump bcould bbe bcaused bby b- b bcorrect banswer. b b bWorn bbearings band bworn bimpeller Trench bsafety bis ba bgreat bconcern bin bTexas. bOSHA brequires bthat banytime ban bexcavation bis bgreater bthan b__ bfeet bdeep bit bmust bbe bprotected bby b______. b- b bcorrect banswer. b b b 5 bfeet b/ bAn bapproved bTrench bBox, bShoring, bor bSloping In babove ban bexcavation bthe bground bif bbanda bladder bbe bsecured bis bused b (^) andbas b abwithin bmeans b____ bof b exit,bfeet b bitlaterally bmust bextend bof banyone b________feet bin bthe bexcavation. b- b bcorrect banswer. b b b 3 bfeet b/ b 25 bfeet blaterally A b____________ bwould bbe bthe bbest bto bdetermine bif ba bstorm bdrain bis bconnected bto ba bsanitary bsewer bline. b- b bcorrect banswer. b b bSmoke bTest

_________ bwould bmost bcommonly bbe bused bto bseal ba bnumber bof bjoint bleaks bon ba bmain bwith bminimal binterruption b- b bcorrect banswer. b b binternal bgrouting Pre-treatment bof bwastewater bwould binclude: b- b bcorrect banswer. b b bCoarse bor bfine bscreening, bgrinding band bgrit bremoval band bgrease bremoval band bpre-aeration Primary btreatment bof bwastewater bwould binclude b- b bcorrect banswer. b b bsettling btanks bor bbasins, bscum bcollection band bremoval, bsludge bcollection band bremoval Secondary btreatment btypically bused btoday bwould binclude b- b bcorrect banswer. b b bStabilization bponds, btrickling bfilters, brotating bbiological bcontractors b(RBC) b& bactivated bsludge Essential bcomponents bof bthe bwastewater bcollection bsystem binclude b- b bcorrect banswer. b b bSewer bmains b& bpiping, bLift bStations, bPumps, bGrease b& bSand btraps, b& bManholes Grit bremoval bwould bbe bconsidered b- b bcorrect banswer. b b bA bpart bof bPrimary bTreatment The bprotozoa bthat bcauses bdysentery bwould bmost blikely bbe bdestroyed bby b- b bcorrect banswer. b b bDisinfection Using bfinal bplant beffluent bin bcooling btowers bwould bbe ba b- b bcorrect banswer. b b bBeneficial bway bto breuse btreated beffluent TCEQ bmay bauthorize bdischarge bof buntreated bwastewater binto bor bnear ba breceiving bstream bin bextreme bcases. bThis bis breferred bto bas b- b bcorrect banswer. b b bBypass Enforcement baction bfrom bTCEQ bmay bbe btaken bif bpollution bor bwaste bviolates bthe bTexas b bWaterdischarge, bCode. baccidental bViolations bdischarge bof bWater b& bCode bhealth bmay bhazard binclude b- b bcorrect banswer. b b bUnauthorized

Solids bin bwastewater bare bclassified bas b- b bcorrect banswer. b b bTotal b(TR), bSuspended b(TSS), bDissolved b(TDS), bSettleable b(SS), bNon-setteable, bFloatable, bOrganic band bInorganic Total bSuspended bSolids b(TSS) bare bthose bthat b- b bcorrect banswer. b b bCan bbe bfiltered bout Total bDissolved bSolids b(TDS) bare bthose bthat b- b bcorrect banswer. b b bcannot bbe bfiltered bout Settable bSolids b(SS) bare bthose bthat b- b bcorrect banswer. b b bSettle bout bwhen bleft bstanding bfor bextended bperiods bof btime Non-settleable bSolids bare b- b bcorrect banswer. b b bSmall bparticles bthat bdo bnot bsettle Volatile bSolids b(VSS) bare bthose bthat b- b bcorrect banswer. b b bAre bdetermined bby bburning bthe bresidue bfrom bthe bTotal bSolids bdetermination

Inorganic bSolids b(ash) bare bthose bthat b- b bcorrect banswer. b b bConsist bof bsand, bgrit, b& bminerals band bcan bbe bsuspended bor bdissolved Organic bmatter bin bwastewater bcan bbe b______or________and bmakes bup bapproximately b_______% bof bthe btotal bsolids b- b bcorrect banswer. b b bDissolved bor bSuspended b/ b 65 The bto b8.0 btypical bpH bof ban binfluent bentering bthe bplant bwill bvary bfrom b- b bcorrect banswer. b b b6.

Acute btoxicity boccurs bwhen b- b bcorrect banswer. b b bThere bis ba brapid bdie boff bof btreatment borganisms Chronic btoxicity boccurs bwhen b- b bcorrect banswer. b b bCertain bmicroorganisms bbecome binactivated bbut bothers bcontinue bto bwork bresulting bin ba bsick bbiological bprocess A bmechanical bdevice bthat bscreens b& bcuts blarge bsolids bin bsmall bparticles b- b bcorrect banswer. b b bCumminuter Detention btime bin bwastewater btypically brefers bto b- b bcorrect banswer. b b bThe btime bsewage bis bkept bin ba bsedimentation bbasis There bunderdrain, bare bfive bwalls, b(5) b majorbfilter b (^) media,bcomponents b& bdistributer bto ba btrickling barms bfilter b- b bcorrect banswer. b b bFilter bfloor,

Zoogleal bMass brefers bto b- b bcorrect banswer. b b bA bthick blayer bof bjelly blike bslime bwhere borganisms bbacteria, bfungi, bprotozoa band bciliates bthrive. The bRemoved befficiency bof ba btrickling bfilter bis bmeasured bin b- b bcorrect banswer. b b bPercent bBOD

Common boperating bproblems bwith ba btrickling bfilter binclude b- b bcorrect banswer. b b bPonding, bFilter bfiles, bOdors, bClogging bof bNozzles, b& bSnails Wastewater bStabilization bPonds bare ban bapproved bprocess bfor bwastewater btreatment. bOrganic bloading bof bStabilization bPonds bis btypically b- b bcorrect banswer. b b b 35 blbs bBOD/Acre/Day bwith ba bminimum bof b 30 bdays bdetention btime Wastewaterbcorrect banswer. bStabilization b b bSunlight, bPonds bOxygen, bwork bNutrients, bthrough ba bAlgae, bcomplex band bprocess bBacteria bwhich bincludes b- b

Facultative bLagoons bhave btwo bzones bof btreatment b- b bcorrect banswer. b b ban baerobic bsurface blayer band ban banaerobic bbottom blayer Typically bone bcould bexpect b____ b% bBOD bremoval bin ba bFacultative bLagoon b- b bcorrect banswer. b b b 50

Aerated bLagoons brely bon b______ bto bprovide b____and b_____ b- b bcorrect banswer. b b bMechanical baeration/ bAeration b& bmixing The bmost bcommon bmethod bof bdewatering band bdrying bsludge bis b- b bcorrect banswer. b b bdrying bbed Digester bmethane bgas btypically bcontains babout b________%_______ b- b bcorrect banswer. b b b65-75%

The bdepth bof bsludge bdrawn bto ba bdrying bbed bshould bbe b- b bcorrect banswer. b b bApproximately b 9 binches Newly bhired bpersonnel bhave b_________to bbecome blicensed. b- b bcorrect banswer. b b b 1 byear Force bMains band bfittings bmust bhave ba bpressure brating bof bat bleast b- b bcorrect banswer. b b b 150 bpsi Most bpumping bstations band belectrical bequipment bused btoday bin bwastewater bcollection bor btreatment bis b________ band btypically beither b_______ bor b_________ bvolts b- b bcorrect banswer. b b bA.C. b(Alternating bCurrent) b& b 220 bor b 440 band bin bsome bcases bA.C. b(Alternating bCurrent) b& b 100 bor b 208 To bavoid belectrical bshock, bthe boperator bshould b________ bif bthey bare bexperiencing bequipment bfailures bor bpower brelated bissues b- b bcorrect banswer. b b bRefer bthe bproblem bto ba btrained belectrical brepairperson band bdo bnot battempt bto bcheck bfuses bor bopen bthe bdisconnect bbox band bNotify bthe bpower bprovider band blet bthem bsend bout ba bserviceman bto bassure bthe bproblem bis bnot bon bthe bprovider's bside. When busing bHydraulic bHydro bJetting bsewer bcleaning bequipment bthe boperator bwill bwant bto bgo bfrom ba b_______ bmanhole band bclean btoward bthe bstoppage bto bavoid b_________. b- b bcorrect banswer. b b bClear bor bopen b/ bForcing bsewage binto bcustomer bhomes bor bbusinesses The bActivated bSludge bProcess bcan bproduce ba bhigh bdegree bof btreatment. bTypically bone bcould bexpect ba b______to_______% bBOD bremoval b- b bcorrect banswer. b b b 90 bto b99% The banswer. bActivated b b bOxygen bSludge bsupply, bplant bAeration bhas bfive b btanks,(5) bCritical bClarifiers, bComponents. bReturn b& bThey bWaste bare b- b bcorrect

The bActivated bSludge bprocess bis ban b________process. b- b bcorrect banswer. b b bAerobic In b_______, bthe bactivated b________, bsludge b& b processb_______ baeration band breturn btanks bbiological bprovide b bsolids.the bspace b- b bcorrect bnecessary banswer. bto b b bMix, baerate, b& bHold bInfluent

In bthe bactive bsludge bprocess, bUtilization bis bthe bprocess bwhere b- b bcorrect banswer. b b bFood bsupply bis bchanged binto ba bliquid bstate bfor buse In bthe bactivated bsludge bprocess, bStabilization bis b- b bcorrect banswer. b b bWastes bbiologically bconverted bto bwater, bcarbon bdioxide, bor bnew bcells In bsludge bthe bactivated bprocess. bsludge b- b bcorrect bprocess, banswer. bthe b b b b_______Clarifier bis bcalled bthe bheart bof bthe bactivated

In bthe bactivated bsludge bprocess, bfactors bthat bwill binfluence bthe boperation bof bthe bfinal bclarifier bare b- b bcorrect banswer. b b bLoading, bsolids bapplied, bsettling, bthickness bof bsolids, brate bof breturn b& bWasting In bthe bactivated bsludge bprocess, bthe bclarifier bwill bconcentrate breturn bsludge band bwaste bsludge babout b___ bto__ btimes bthe bsolids bconcentration bof bthe bmixed bliquor b- b bcorrect banswer. b b btwo b(2) bto bfour b(4) In bthe bactivated bsludge bprocess, bfor bthe bclarifier bto bdo bits bjob, bthe b____ bmust bbe bretained blong benough bto ballow b______ bto bsettle band bliquid bto brise. b- b bcorrect banswer. b b bwater/ bsolids In bthickness bthe bactivated bof bthe bsludge bsludge bprocess, bblanket bbwillas b bmore- b bcorrect bmixed banswer. bliquor bb b bflowsIncrease bto bthe bas bclarifier, bsolids b baccumulatethe

In bthe bactivated bsludge bprocess, bbiological bsolids bfrom bthe bbottom bof bthe bclarifier bmust bbe breturned bto bthe baeration bbasin bfor bre-seed. bThis bprocess bis baccomplished bby b- b bcorrect banswer. b b bAir blift bpumps, bcentrifugal bpumps, bDiaphragm bpumps, bScrew bpumps b& bGravity bFlow In bthe bactivated bsludge bprocess, bno bsludge bprocess bwill bwork bproperly bwithout b- b bcorrect banswer. b b bRegular bremoval bof bexcess bsolids InbMaintaining bthe bactivated bthe b sludgebbalance bprocess, bbetween bMass bReturn bBalance bSludge brefers bFlow, bto bReturn b- b bcorrect bSludge, banswer. bAeration b b btank bvolume, bMixed bliquor bsuspended bsolids In bthe bactivated bsludge bprocess, bthe bterms bF/M bratio bis bimportant bbecause bthis brefers bto b- b bcorrect banswer. b b bFood bto bMicroorganism bRatio In bthe bactivated bsludge bprocess, bthe bF/M bRatio bis bcalculated bby b______ bthe bpounds bof b_________ bby bthe bpounds bof bMLVSS bin bthe b___________. b- b bcorrect banswer. b b bDividing/ bIncoming bBOD/ baeration btank In bthe bactivated bsludge bprocess, bthe bterm bGould bSludge bAge brefers bto b- b bcorrect banswer. b b bHow blong bin bdays ba bpound bof bsolids bstays bin bthe baerator

In bthe bactivated bsludge bprocess, bGould bSludge bAge b(GSA) bis bcalculated bby b- b bcorrect b banswer.entering b b b btheDividing baerator bthe bas btotal braw bpounds bof bTSS bin bthe baerator bby bthe bpounds bof bTSS

In bthe bactivated bsludge bprocess, bthe bterm bMean bCell bResidence bTime b(MCRT) brefers bto b- b bcorrect banswer. b b bThe bamount bof btime bthe bliving bcells bare bkept bin bthe bplant In bthe bactivated bsludge bprocess, bdaily bobservation bof bthe baeration bbasin btreatment bprocesses bare bessential. bThe boperator bshould bpay bclose battention bto b- b bcorrect banswer. b b bSurface bturbulence, bFoam, bOdors, b& bColor In bThe bthe boperator bactivated bshould bsludge bpay bprocess, bclose b (^) attentionbdaily bobservation bto b- b bcorrect bof b thebanswer. bfinal b clarifierb b bSurface bis bbalsoscum, bessential. bSludge bblanket, bWeir bFlow, bRising bsolids, b& bClarifier boverflow In bthe bactivated bsludge bprocess, bfive b(5) bImportant bcontrol bparameters bare b- b bcorrect b banswer.returned b b b bsludge,Dissolved b& bWasting bOxygen brate blevel, bAerator bsolids blevel, bSolids bquality, bRate bof

In bthe bactivated bsludge bprocess, bDissolved bOxygen blevels bthroughout bthe baeration bbasins bare bmeasured busing ba bportable bDO bmeter. bThe boperator bshould bkeep bDO blevels bbetween b______ band b_______. b- b bcorrect banswer. b b b 2 bmg/L band b4.0 bmg/L In bthe bactivated bsludge bprocess, b"Classic bBulking" bis ba bcommon bproblem btypically bcaused bby b- b bcorrect banswer. b b bLow bdensity bsludge In bthe bactivated bsludge bprocess, bSludge bRising bdiffers bfrom b"Sludge bBulking" band b b"Sludgeprocess bRising" bis btypically bassociated b- b bcorrect banswer. b b bNitrification b- bDe-nitrification

In bthe bactivated bsludge bprocess, btechniques bused bto breduce b"Frothing b& bFoaming" btypically binclude b- b bcorrect banswer. b b bAdjusting bsludge bage, bReducing bthe bamount bof bair, bSpraying bthe bfrothing barea bwith bwater, bApplying bde-foaming bagents In bthe bactivated bsludge bprocess, bfloc bis bvery bimportant bto bthe bsettling bprocess. bFloc bis bcomposed bprimarily bof b- b bcorrect banswer. b b bBacteria, bProtozoa, bMicroscopic bAnimals, b& bFungi In bthe bactivated bsludge bplants, bthe boperator bwill bexperience bproblems. bSome bof bthe bcommon bTreatment bplant bproblems binclude b- b bcorrect banswer. b b bInsufficent bcapacity, bEquipment bfailures, bDesign binadequacies, bPoor bmaintenance, b& bInflow brates bexceed bplant bcapacities. In bthe bactivated bsludge bplants bthe boperator bwill bexperience bproblems. bSome bof bthe bcommon bInfluent bproblems binclude b- b bcorrect banswer. b b bSeptic binflow, bOrganic

boverloading, band bunder bloading, bHydraulic boverloading, bSolids bwashout bduring bstorm binflow, bToxic bsubstances, bShock bloads, b& bNutrient bdeficiencies In bthe bactivated bsludge bplants, bthe boperator bwill bexperience bproblems. bSome bcommon bOperational bproblems binclude b- b bcorrect banswer. b b bSludge bquality, bfoaming, bimproper boperating btechniques In bEnvironmental bthe bactivated b (^) problemsbsludge bplants, binclude. bthe b (^) - boperator b bcorrect bbwillanswer. bexperience b b bLow b btemperatures,problems. bSome bSystem bcommon bpH bout bof brange, b& bExcessive balgae bgrowth In bthe bactivated bsludge bplants, bto bproperly bset bthe bclarifier breturn brate bthe boperator bmust b bknowthickness, bthree b& bthings bthe bSolids b- b bcorrect bconcentration banswer. b b b bofReturn bthe breturn bactivated bflow bsludge brate, bSludge bblanket

The btypical bsludge bage bfor bextended baeration bplants bis b- b bcorrect banswer. b b b 20 bto b 40 bdays In bthe bactivated bsludge bplant, bgood bquality bsludge bwill bsettle b_________& b_______ bover b_________ bminute bperiod. b- b bcorrect banswer. b b bGently b& bUniformly bover b 15 bto b 20 bminutes In b________ bthe bactivated bminute bsludge bperiod. bplant, b- b bcorrect bold bsludge banswer. bquality b b bRapidly bwill bsettle band b________& bragged bover b_________ b 5 bminutes. bover

In bthe bactivated bsludge bplant, bthere bare b(5) bimportant bnitroen btransformation bprocesses bthat boccur bby bmicroorganisms. bThey bare- b- b bcorrect banswer. b b bAssumilation, bAmmonification, bNitrification, bDenitrification, b& bNitrogen bfixation. __________in bthe beffluent bfrom ban bactivated bsludge bprocess bis ba bpollutant band bmay bcreate btoxic bconditions bfor baquatic blife bin bthe breceiving bstream b- b bcorrect banswer. b b bNitrogen Denitrification bmaintain bthe b (^) aerobicboccurs bbinmetabolism ban bactivated bof b (^) thebsludge bcarbon bsystem bstabilizing bwhen bbtherebacteria. bis b__________ b- b bcorrect banswer. bto b b bInsufficient bDissolved bOxygen The black bof b_________ btriggers bthe bfacuitative bbacteria bto bchange bfrom baerobic band banaerobic b- b bcorrect banswer. b b bDissolved bOxygen In bthe bactivated bsludge bsystem, b"Hydraulic bWash bOut" bis b- b bcorrect banswer. b b bWhen bthe bupward bmovement bof bthe bwater bin bthe bclarifier bexceeds bthe bdownward bsettling bvelocity In banswer. bthe bactivated b b bflow b (^) equalization,bsludge bsystem, bAdditional bHydraulic bclarifier bWash bcapacity bOut bcan bor bbe binflow bcontrolled breduction bby b- b bcorrect

In bthe bactivated bsludge bsystem, bif bthe boperator bobserved bBoiling baction, bViolent bturbulence bthroughout bthe baeration btank bsurface, bLarge bair bbubbles b1/2 binch bor b bgreater,high bDO bthe band boperator bor bfloc b (^) shearingbwould bsuspect- btherefore b- b b bcorrectthe boperator banswer. bshould b b bOver breduce baeration bthe b bairresulting bSCFM bin bto bget bDO binto bthe bproper brange In bthe bactivated bsludge bsystem bif bthe boperator bobserved buneven bsurface baeration, bdead b bspotsanswer. bor b b bbinadequatePlugged bdiffusers bmixing bin bsome bareas, bthe boperator bwould bsuspect b- b bcorrect

In bthe bactivated bsludge bsystem, bif bthe boperator bobserves bwhite bthick bbillowing bsudsy bfoam bon bthe baeration btank, bthe boperator bwould bsuspect b- b bcorrect banswer. b b bOverloaded baeration btank band bor bexcessive bsludge bwasting In bthe bactivated bsludge bsystem, bif bthe boperator bobserves bexcessive bair bbeing bused bwith bno bapparent bchange bin borganic bor bhydraulic bloading, bthe boperator bwould bsuspect b- b bcorrect banswer. b b bLeaks bin bthe bsystem bpiping, bPlugged bair bdiffusers b& bHigh borganic bloading The bmaximum bsafe bwithdrawal brate bfor ba b 150 blb bchlorine bcylinder bis b- b bcorrect banswer. b b b 40 blbs To bdetermine bthe bapproximate bnumber bof bgallons bper bday bbeing bdischarged bto bthe bcollection bsystem, bmultiply bthe bpopulation bby b____ bgallons/person/day. b- b bcorrect banswer. b b b 100