TCEQ Class D Water Operator License
Exam Questions & Answers (Verified),
100% Guaranteed Pass ||Complete A+
Guide
a qcommon qtype qof qoxidant qthat qis qused qat qmost qsurface qwater qtreatment qplants qto qkill
bacteria qand qto qprevent qtrihalomethane qformation qis
Correct qAnswer: q q combined qchlorine
Which qof qthe qfollowing qis qa qrequired qstep qin qcollecting qa qroutine qdistribution qsample qof
microbiological qanalysis
1
,Correct qAnswer: q q use qa qsterilized qbottles qcontaining qsodium qthiosulfate
which qminerals qcause qwater qhardness
Correct qAnswer: q q calcium qand qmagnesium
Before qa qnew qmain qis qplaced qinto qservice, qit qmust qbe qproperly qdisinfected qwith qa
qminimum
chlorine qdosage qof:
a) 50 qmg/L
b) 30 qmg/L
c) 40 qmg/L
d) 75 qmg/L
e) 25 qmg/L
Correct qAnswer: q q 25 qmg/L
A qdisease qwhich qmay qbe qspread qby qinadequately qdisinfected qwater qis
Correct qAnswer: q q Hepatitis qA
A qphysical qconnection qbetween qa qpotable qwater qsupply qand qnon-potable qwater qsource qis
Correct qAnswer: q q cross qconnection
2
,underground qgeological qwater qbearing qformations qthat qare qused qfor qpublic qwater
qsupplies
are qcalled
Correct qAnswer: q q aquifers
Gravity qfilters qwill qremove qwhich qof qthe qfollowing qfrom qsurface qwater qsupplies:
a) turbidity
b) taste qand qodors
c) nitrates
d) hardness
e) chlorides
Correct qAnswer: q q turbidity
Activated qcarbon qis qused qat qa qsurface qwater qtreatment qplant qprimarily qfor
Correct qAnswer: q q taste qand qodor qcontrol
Which qof qthe qfollowing qis qpart qof qa qhyperchlorination qsystem
Correct qAnswer:
A qcommon qchemical qused qfor qdisinfecting qa qsmall qpublic qwater qsupply qis
Correct qAnswer:
Your qground qstorage qtank qis q15 qfeet qhigh qand q30 qfeet qin qdiameter. qAbout qhow qmuch
water qcan qit qhold?
3
, a) 31,700 qgallons
b) 79,270 qgallons
c) 50, q490 qgallons
d) 25,150 qgallons
e) 10,600 qgallons
Correct qAnswer: q q 79270
If qyou qadded q3.5 qmg/L qof qchlorine qto qyour qstorage qtank qand q30 qminutes qlater qmeasured
the qresidual qat q1.2 qmg/L, qwhat qwas qthe qchlorine qdemand qin qthe qtank?
a) 4.2
b) 2.9
c) 0.3
d) 2.3
e) 4.7
Correct qAnswer: q q 2.3
which qof qthe qfollowing qchemicals qis qcommonly qused qas qa qcoagulant qin qsurface qwater
treatment
Correct qAnswer: q q aluminum qsulfate
The qdrawdown qof qa qwell qis qdetermined qby:
a) a qproperly qinstalled qair qline
b) the qdifference qbetween qthe qstatic qand qpumping qlevel
4
Exam Questions & Answers (Verified),
100% Guaranteed Pass ||Complete A+
Guide
a qcommon qtype qof qoxidant qthat qis qused qat qmost qsurface qwater qtreatment qplants qto qkill
bacteria qand qto qprevent qtrihalomethane qformation qis
Correct qAnswer: q q combined qchlorine
Which qof qthe qfollowing qis qa qrequired qstep qin qcollecting qa qroutine qdistribution qsample qof
microbiological qanalysis
1
,Correct qAnswer: q q use qa qsterilized qbottles qcontaining qsodium qthiosulfate
which qminerals qcause qwater qhardness
Correct qAnswer: q q calcium qand qmagnesium
Before qa qnew qmain qis qplaced qinto qservice, qit qmust qbe qproperly qdisinfected qwith qa
qminimum
chlorine qdosage qof:
a) 50 qmg/L
b) 30 qmg/L
c) 40 qmg/L
d) 75 qmg/L
e) 25 qmg/L
Correct qAnswer: q q 25 qmg/L
A qdisease qwhich qmay qbe qspread qby qinadequately qdisinfected qwater qis
Correct qAnswer: q q Hepatitis qA
A qphysical qconnection qbetween qa qpotable qwater qsupply qand qnon-potable qwater qsource qis
Correct qAnswer: q q cross qconnection
2
,underground qgeological qwater qbearing qformations qthat qare qused qfor qpublic qwater
qsupplies
are qcalled
Correct qAnswer: q q aquifers
Gravity qfilters qwill qremove qwhich qof qthe qfollowing qfrom qsurface qwater qsupplies:
a) turbidity
b) taste qand qodors
c) nitrates
d) hardness
e) chlorides
Correct qAnswer: q q turbidity
Activated qcarbon qis qused qat qa qsurface qwater qtreatment qplant qprimarily qfor
Correct qAnswer: q q taste qand qodor qcontrol
Which qof qthe qfollowing qis qpart qof qa qhyperchlorination qsystem
Correct qAnswer:
A qcommon qchemical qused qfor qdisinfecting qa qsmall qpublic qwater qsupply qis
Correct qAnswer:
Your qground qstorage qtank qis q15 qfeet qhigh qand q30 qfeet qin qdiameter. qAbout qhow qmuch
water qcan qit qhold?
3
, a) 31,700 qgallons
b) 79,270 qgallons
c) 50, q490 qgallons
d) 25,150 qgallons
e) 10,600 qgallons
Correct qAnswer: q q 79270
If qyou qadded q3.5 qmg/L qof qchlorine qto qyour qstorage qtank qand q30 qminutes qlater qmeasured
the qresidual qat q1.2 qmg/L, qwhat qwas qthe qchlorine qdemand qin qthe qtank?
a) 4.2
b) 2.9
c) 0.3
d) 2.3
e) 4.7
Correct qAnswer: q q 2.3
which qof qthe qfollowing qchemicals qis qcommonly qused qas qa qcoagulant qin qsurface qwater
treatment
Correct qAnswer: q q aluminum qsulfate
The qdrawdown qof qa qwell qis qdetermined qby:
a) a qproperly qinstalled qair qline
b) the qdifference qbetween qthe qstatic qand qpumping qlevel
4
