Water Operator Class 3-Practice Test
Questions With Correct Answers
MCL |for |TTHM's |- |CORRECT |ANSWER✔✔-0.08 |ppm
MCL |for |HAA5's |- |CORRECT |ANSWER✔✔-0.06 |ppm
MCL |for |Arsenic |- |CORRECT |ANSWER✔✔-0.01 |ppm
MCL |for |Lead |- |CORRECT |ANSWER✔✔-0.015 |ppm
Turbidity |meter |must |be |calibrated |every: |- |CORRECT |ANSWER✔✔-90 |days
MCL |for |turbidity |is |- |CORRECT |ANSWER✔✔-Less |than |0.3 |for |95% |of |the |time.
pH |meters |must |be |calibrated |using |- |CORRECT |ANSWER✔✔-2 |buffers
A |grassy |of |fishy |taste |in |reservoir |water |indicates |- |CORRECT |ANSWER✔✔-Algae |blooms
Mudballs |are |caused |by |- |CORRECT |ANSWER✔✔-Improper |backwashing |of |filters
Lime |can |only |be |used |to |soften |water |with |- |CORRECT |ANSWER✔✔-Carbonate
Water |leaving |Zeolite |softener |has |a |hardness |of |- |CORRECT |ANSWER✔✔-0 |ppm
, The |top |layer |of |a |slow |sand |filter |is |called |the |- |CORRECT |ANSWER✔✔-Schmutzdecke
A |solids |contact |unit |combines |- |CORRECT |ANSWER✔✔-Coagulation, |flocculation, |
sedimentation
The |PMCL |for |fluoride |is: |The |SMCL |is: |- |CORRECT |ANSWER✔✔-4 |ppm, |2 |ppm
Flock |will |settle |better |in |warm |or |cool |water? |- |CORRECT |ANSWER✔✔-Warmer
The |greensand |manganese |removal |process |requires |a: |- |CORRECT |ANSWER✔✔-High |pH
Aeration |releases |what |from |water? |- |CORRECT |ANSWER✔✔-Volatile |organic |compounds |& |
gases |(odor)
The |most |accurate |method |of |determining |chlorine |residual |is: |- |CORRECT |ANSWER✔✔-
Amperomatic |tiration
An |alkalinity |sample |is |titrated |using |- |CORRECT |ANSWER✔✔-Sulfuric |acid
A |beaker |is |used |for |- |CORRECT |ANSWER✔✔-Mixing |and |measuring
NTU |stands |for: |- |CORRECT |ANSWER✔✔-Nephelometric |turbidity |units
Bacteria |results |must |be |kept |for: |Chem |results |for: |- |CORRECT |ANSWER✔✔-5 |years, |10 |years
Questions With Correct Answers
MCL |for |TTHM's |- |CORRECT |ANSWER✔✔-0.08 |ppm
MCL |for |HAA5's |- |CORRECT |ANSWER✔✔-0.06 |ppm
MCL |for |Arsenic |- |CORRECT |ANSWER✔✔-0.01 |ppm
MCL |for |Lead |- |CORRECT |ANSWER✔✔-0.015 |ppm
Turbidity |meter |must |be |calibrated |every: |- |CORRECT |ANSWER✔✔-90 |days
MCL |for |turbidity |is |- |CORRECT |ANSWER✔✔-Less |than |0.3 |for |95% |of |the |time.
pH |meters |must |be |calibrated |using |- |CORRECT |ANSWER✔✔-2 |buffers
A |grassy |of |fishy |taste |in |reservoir |water |indicates |- |CORRECT |ANSWER✔✔-Algae |blooms
Mudballs |are |caused |by |- |CORRECT |ANSWER✔✔-Improper |backwashing |of |filters
Lime |can |only |be |used |to |soften |water |with |- |CORRECT |ANSWER✔✔-Carbonate
Water |leaving |Zeolite |softener |has |a |hardness |of |- |CORRECT |ANSWER✔✔-0 |ppm
, The |top |layer |of |a |slow |sand |filter |is |called |the |- |CORRECT |ANSWER✔✔-Schmutzdecke
A |solids |contact |unit |combines |- |CORRECT |ANSWER✔✔-Coagulation, |flocculation, |
sedimentation
The |PMCL |for |fluoride |is: |The |SMCL |is: |- |CORRECT |ANSWER✔✔-4 |ppm, |2 |ppm
Flock |will |settle |better |in |warm |or |cool |water? |- |CORRECT |ANSWER✔✔-Warmer
The |greensand |manganese |removal |process |requires |a: |- |CORRECT |ANSWER✔✔-High |pH
Aeration |releases |what |from |water? |- |CORRECT |ANSWER✔✔-Volatile |organic |compounds |& |
gases |(odor)
The |most |accurate |method |of |determining |chlorine |residual |is: |- |CORRECT |ANSWER✔✔-
Amperomatic |tiration
An |alkalinity |sample |is |titrated |using |- |CORRECT |ANSWER✔✔-Sulfuric |acid
A |beaker |is |used |for |- |CORRECT |ANSWER✔✔-Mixing |and |measuring
NTU |stands |for: |- |CORRECT |ANSWER✔✔-Nephelometric |turbidity |units
Bacteria |results |must |be |kept |for: |Chem |results |for: |- |CORRECT |ANSWER✔✔-5 |years, |10 |years
