Class C Water Operator License Exam
Questions With Correct Answers
Ammonia bmixed bwith bchlorine bgas bcreates ba bwhite bsmoke b- bcorrect
banswers✔✔white bsmoke
The bmost bdifficult bpart bof ba bwater bdistribution boperator's bjob bis bfurnish ba
bcontinuous bsupply b- bcorrect banswers✔✔furnish ba bcontinuous bsupply
Physical bconnection bbetween ba bsafe band bpotentially bunsafe bwater bsource bis ba
bcross bconnection b- bcorrect banswers✔✔cross bconnection
A bdistribution bsystem bis ba blooped bsystem b- bcorrect banswers✔✔looped bsystem
Dead bend bmains bshould bbe bflushed bevery bmonth b- bcorrect banswers✔✔every
bmonth
Excess bnitrate bcauses ba bcondition bcalled bblue bbaby bsyndrome b- bcorrect
banswers✔✔blue bbaby bsyndrome
Water bhardness bis bcaused bby bcalcium band bmagnesium b- bcorrect
banswers✔✔calcium band bmagnesium
Sewer bmains bshould bbe b9 bft baway bfrom bwater bmains. b- bcorrect banswers✔✔9
Water bwith ba bpH bless bthan b7 bis bconsidered bto bbe bacidic b- bcorrect
banswers✔✔acidic
Bacti brecords bare bkept bfor b5yrs band bchemical brecords bare bkept bfor b10 byrs. b-
bcorrect banswers✔✔5, b10
Bacti bsamples bhave bto bbe breturned bto bthe blab bwithin b30 bhrs bof bthe bcollection
btime. b- bcorrect banswers✔✔30
Color bin bthe bwater bsupply bshould bbe bless bthan b15 bunits. b- bcorrect banswers✔✔15
Chlorine bis b2.5 btimes bheavier bthan bair. b- bcorrect banswers✔✔2.5
, 90% bof bunderground bpipe bfailures bare brelated bto bimproper bbackfill band bbedding b-
bcorrect banswers✔✔backfill band bbedding
The bspoil bbank bshould bbe blocated bat bleast b2ft baway bfrom bthe bditch. b- bcorrect
banswers✔✔2
The bfollowing bminimum bresiduals bis b.2mg/L bfor bfree bchlorine band b.5mg/L bfor btotal
bchlorine. b- bcorrect banswers✔✔.2, b.5
Public bopinion bof bthe bwater butility bis bnever bat ba bstandstill. b- bcorrect
banswers✔✔never
A bbacti bsample bshould bbe btaken bevery b1000ft bof bpipe. b- bcorrect banswers✔✔1000
The bmost bcommon bcollection bpoint bfor ba bbacti bsample bis bthe bwater btap boutside
bthe bhouse. b- bcorrect banswers✔✔outside bthe bhouse
A bstandpipe bis bconsidered bground bstorage bunless bit bexceeds b80ft babove bthe
bhighest bservice bconnection. b- bcorrect banswers✔✔80, bservice bconnection
cathodic bprotection bis bthe belectrochemical bmethod bfor bpreventing bcorrosion bof
bmetal btanks. b- bcorrect banswers✔✔cathodic, bcorrosion
The bair bgap bis bthe bonly bcross bconnection bcontrol bmethod bapproved bby btceq. b-
bcorrect banswers✔✔air bgap, btceq
friction bloss bon ba bpipeline bdepend bon bthe bc bfactor bor bcoefficient bof bpipe
broughness. b- bcorrect banswers✔✔friction bloss, bc bfactor
water bhammer boccurs bwhenever bthere bis ba bsudden bchange bin bthe bvelocity bor
bdirection bof bwater bflow. b- bcorrect banswers✔✔water bhammer, bsudden bchange
The bminimum bwater bpressure brequired bby bthe brules band bregulations bis b20 bpsi
bunder bany band ball bconditions. b- bcorrect banswers✔✔minimum, b20
100, b150, b200 band b250 bare bapproved bclasses bof bworking bpressure. b- bcorrect
banswers✔✔working bpressure
concrete bis bused bto banchor bpipe bbends. b- bcorrect banswers✔✔concrete
A bgeneral bdeposit bof bmineral bparticles bevenly balong bthe binside bof bthe bpipe bis
btuberculation. b- bcorrect banswers✔✔tuberculation
Shoring bshould bbe bused bif ba bditch bis b5ft bor bdeeper. b- bcorrect banswers✔✔5
Questions With Correct Answers
Ammonia bmixed bwith bchlorine bgas bcreates ba bwhite bsmoke b- bcorrect
banswers✔✔white bsmoke
The bmost bdifficult bpart bof ba bwater bdistribution boperator's bjob bis bfurnish ba
bcontinuous bsupply b- bcorrect banswers✔✔furnish ba bcontinuous bsupply
Physical bconnection bbetween ba bsafe band bpotentially bunsafe bwater bsource bis ba
bcross bconnection b- bcorrect banswers✔✔cross bconnection
A bdistribution bsystem bis ba blooped bsystem b- bcorrect banswers✔✔looped bsystem
Dead bend bmains bshould bbe bflushed bevery bmonth b- bcorrect banswers✔✔every
bmonth
Excess bnitrate bcauses ba bcondition bcalled bblue bbaby bsyndrome b- bcorrect
banswers✔✔blue bbaby bsyndrome
Water bhardness bis bcaused bby bcalcium band bmagnesium b- bcorrect
banswers✔✔calcium band bmagnesium
Sewer bmains bshould bbe b9 bft baway bfrom bwater bmains. b- bcorrect banswers✔✔9
Water bwith ba bpH bless bthan b7 bis bconsidered bto bbe bacidic b- bcorrect
banswers✔✔acidic
Bacti brecords bare bkept bfor b5yrs band bchemical brecords bare bkept bfor b10 byrs. b-
bcorrect banswers✔✔5, b10
Bacti bsamples bhave bto bbe breturned bto bthe blab bwithin b30 bhrs bof bthe bcollection
btime. b- bcorrect banswers✔✔30
Color bin bthe bwater bsupply bshould bbe bless bthan b15 bunits. b- bcorrect banswers✔✔15
Chlorine bis b2.5 btimes bheavier bthan bair. b- bcorrect banswers✔✔2.5
, 90% bof bunderground bpipe bfailures bare brelated bto bimproper bbackfill band bbedding b-
bcorrect banswers✔✔backfill band bbedding
The bspoil bbank bshould bbe blocated bat bleast b2ft baway bfrom bthe bditch. b- bcorrect
banswers✔✔2
The bfollowing bminimum bresiduals bis b.2mg/L bfor bfree bchlorine band b.5mg/L bfor btotal
bchlorine. b- bcorrect banswers✔✔.2, b.5
Public bopinion bof bthe bwater butility bis bnever bat ba bstandstill. b- bcorrect
banswers✔✔never
A bbacti bsample bshould bbe btaken bevery b1000ft bof bpipe. b- bcorrect banswers✔✔1000
The bmost bcommon bcollection bpoint bfor ba bbacti bsample bis bthe bwater btap boutside
bthe bhouse. b- bcorrect banswers✔✔outside bthe bhouse
A bstandpipe bis bconsidered bground bstorage bunless bit bexceeds b80ft babove bthe
bhighest bservice bconnection. b- bcorrect banswers✔✔80, bservice bconnection
cathodic bprotection bis bthe belectrochemical bmethod bfor bpreventing bcorrosion bof
bmetal btanks. b- bcorrect banswers✔✔cathodic, bcorrosion
The bair bgap bis bthe bonly bcross bconnection bcontrol bmethod bapproved bby btceq. b-
bcorrect banswers✔✔air bgap, btceq
friction bloss bon ba bpipeline bdepend bon bthe bc bfactor bor bcoefficient bof bpipe
broughness. b- bcorrect banswers✔✔friction bloss, bc bfactor
water bhammer boccurs bwhenever bthere bis ba bsudden bchange bin bthe bvelocity bor
bdirection bof bwater bflow. b- bcorrect banswers✔✔water bhammer, bsudden bchange
The bminimum bwater bpressure brequired bby bthe brules band bregulations bis b20 bpsi
bunder bany band ball bconditions. b- bcorrect banswers✔✔minimum, b20
100, b150, b200 band b250 bare bapproved bclasses bof bworking bpressure. b- bcorrect
banswers✔✔working bpressure
concrete bis bused bto banchor bpipe bbends. b- bcorrect banswers✔✔concrete
A bgeneral bdeposit bof bmineral bparticles bevenly balong bthe binside bof bthe bpipe bis
btuberculation. b- bcorrect banswers✔✔tuberculation
Shoring bshould bbe bused bif ba bditch bis b5ft bor bdeeper. b- bcorrect banswers✔✔5
