WASTEWATER OPERATOR CERTIFICATION STUDY GUIDE-GRADE 2 QUESTIONS AND CORRECT ANSWERS

WASTEWATER OPERATOR
CERTIFICATION STUDY GUIDE-GRADE 2
QUESTIONS AND CORRECT ANSWERS

GeneralA2WastewaterA2Treatment:

WhatA2isA2theA2pressureA2headA2causedA2by?A2-A2Ans--WaterA2elevation

GeneralA2WastewaterA2Treatment:

WhatA2colorA2shouldA2theA2pipingA2beA2thatA2containsA2reclaimedA2water?A2-A2Ans--purple

GeneralA2WastewaterA2Treatment:

WhatA2isA2theA2termA2forA2theA2heightA2toA2whichA2aA2columnA2ofA2waterA2willA2riseA2inA2aA2
well.A2-A2Ans--piezometricA2surface

GeneralA2WastewaterA2Treatment:

InA2general,A2whatA2isA2theA2maximumA2practicalA2liftA2ofA2pumpsA2-A2Ans--15-25ft

GeneralA2WastewaterA2Treatment:

WhichA2oneA2ofA2theA2followingA2valvesA2isA2theA2bestA2toA2useA2inA2throttlingA2aA2flowA2sit
uation?
a.A2gate
b.A2butterfly
c.A2globe
d.A2ballA2-A2Ans--globe

GeneralA2WastewaterA2Treatment:

WhichA2oneA2ofA2theA2followingA2devicesA2isA2usedA2toA2measureA2waterA2depthsA2inA2stor
ageA2facilities?

a.A2transducer
b.A2VenturiA2meter
c.A2magneticA2sensor
d.A2thermistorA2-A2Ans--transducer

WastewaterA2TreatmentA2Facilities:

TheA2velocityA2inA2sanitaryA2sewersA2isA2approximately:A2-A2Ans--2A2ft/s

,WastewaterA2TreatmentA2Facilities:

TheA2distanceA2betweenA2manholesA2rangesA2fromA2-A2Ans--300-500ft

WastewaterA2TreatmentA2Facilities:

WhatA2shouldA2theA2flowA2velocityA2beA2throughA2aA2gritA2channelA2-A2Ans--1.0A2ft/s

WastewaterA2TreatmentA2Facilities:

GritA2washersA2areA2usedA2to______

a.A2removeA2someA2ofA2theA2organicA2matter
b.A2removeA2largeA2piecesA2ofA2wood
c.A2removeA2ragsA2andA2eggshells
d.A2removeA2theA2odorsA2-A2Ans--removeA2someA2ofA2theA2organicA2matter

WastewaterA2TreatmentA2Facilities:

TheA2mostA2commonA2flow-measureA2deviceA2forA2wastewaterA2isA2a_____A2-A2Ans--
parshallA2flume

WastewaterA2TreatmentA2Facilities:

TheA2detentionA2timeA2forA2primaryA2clarifiersA2usuallyA2hasA2aA2rangeA2of_____hr/sA2-
A2Ans--1.5-2hr


WastewaterA2TreatmentA2Facilities:

TheA2effluentA2fromA2whichA2processA2isA2calledA2mixedA2liquor

a.secondaryA2clarification
b.A2primaryA2clarification
c.A2sludgeA2dryingA2bedA2orA2pond
d.A2activatedA2sludgeA2-A2Ans--activatedA2sludge

WastewaterA2TreatmentA2Facilities:

AerobicA2pondsA2usuallyA2rangeA2inA2depthA2fromA2___-____ftA2-A2Ans--3-6ft

WastewaterA2TreatmentA2Facilities:

AnaerobicA2pondsA2usuallyA2rangeA2inA2depthA2from___-___ftA2-A2Ans--8-12ft

WastewaterA2TreatmentA2Facilities:

, AnotherA2nameA2forA2aA2wasteA2stabilizationA2pondA2isA2-A2Ans--rawA2wastewaterA2lagoon

WastewaterA2sourcesA2&A2characteristics:

TypicallyA2whatA2averageA2percentA2ofA2totalA2solidsA2inA2aA2domesticA2wastewater,A2both
A2dissolvedA2andA2suspended,A2areA2inorganicsA2-A2Ans--50%


WastewaterA2sourcesA2&A2characteristics:

Typically,A2whatA2averageA2percentA2ofA2totalA2solidsA2inA2domesticA2wastewater,A2bothA2d
issolvedA2andA2suspended,A2areA2inorganics?A2-A2Ans--50%

WastewaterA2sourcesA2&A2characteristics:

Approx.A2whatA2%A2ofA2theA2dissolvedA2solidsA2inA2wastewaterA2areA2inorganicsA2-A2Ans--
87%

WastewaterA2sourcesA2&A2characteristics:

ApproximatelyA2whatA2%A2ofA2theA2dissolvedA2solidsA2inA2wastewaterA2areA2organicsA2-
A2Ans--12%


WastewaterA2sourcesA2&A2characteristics:

WhichA2organismA2woldA2mostA2probablyA2beA2associatedA2withA2moderateA2sludgeA2ageA
2andA2effluentA2waterA2qualityA2-A2Ans--free-swimmingA2ciliates


WastewaterA2sourcesA2&A2characteristics:

WhichA2organismA2wouldA2mostA2probablyA2beA2associatedA2withA2highA2suspendedA2soli
dsA2andA2biochemicalA2oxygenA2demandA2(BOD)A2-A2Ans--amoebas

WastewaterA2sourcesA2&A2characteristics:

HighA2suspendedA2solidsA2andA2BODA2areA2mostA2probablyA2associatedA2withA2whichA2ty
peA2ofA2organisms?A2-A2Ans--flagellates

WastewaterA2sourcesA2&A2characteristics:

WhatA2organismA2wouldA2mostA2likelyA2enhanceA2theA2penetrationA2ofA2oxygenA2intoA2theA
2activatedA2sludgeA2-A2Ans--rotifers


Rocks/Screens/ComminutorsA2&A2GritA2Removal:

ChlorineA2gasA2hasA2aA2specificA2gravityA2ofA2-A2Ans--2.5A2specificA2gravity