Water Operator Class 3-Practice Test
Questions EXAM, /GET IT 100%
ACCURATE!! 2026!! MOST TESTED
QUESTIONS AND VERIFIED SOLUTIONS
0.08 ppm -CORRECTANSWER MCL for TTHM's
0.06 ppm -CORRECTANSWER MCL for HAA5's
0.01 ppm -CORRECTANSWER MCL for Arsenic
0.015 ppm -CORRECTANSWER MCL for Lead
90 days -CORRECTANSWER Turbidity meter must be calibrated every:
Less than 0.3 for 95% of the time. -CORRECTANSWER MCL for turbidity is
2 buffers -CORRECTANSWER pH meters must be calibrated using
Algae blooms -CORRECTANSWER A grassy of fishy taste in reservoir water indicates
Improper backwashing of filters -CORRECTANSWER Mudballs are caused by
,Carbonate -CORRECTANSWER Lime can only be used to soften water with
0 ppm -CORRECTANSWER Water leaving Zeolite softener has a hardness of
Schmutzdecke -CORRECTANSWER The top layer of a slow sand filter is called the
Coagulation, flocculation, sedimentation -CORRECTANSWER A solids contact unit
combines
4 ppm, 2 ppm -CORRECTANSWER The PMCL for fluoride is: The SMCL is:
Warmer -CORRECTANSWER Flock will settle better in warm or cool water?
High pH -CORRECTANSWER The greensand manganese removal process requires a:
Volatile organic compounds & gases (odor) -CORRECTANSWER Aeration releases
what from water?
Amperomatic tiration -CORRECTANSWER The most accurate method of determining
chlorine residual is:
Sulfuric acid -CORRECTANSWER An alkalinity sample is titrated using
, Mixing and measuring -CORRECTANSWER A beaker is used for
Nephelometric turbidity units -CORRECTANSWER NTU stands for:
5 years, 10 years -CORRECTANSWER Bacteria results must be kept for: Chem results
for:
Tubrbine, Propeller, Venturi, Nutating discs -CORRECTANSWER Four ways water
meters operate are:
Procedure, Part, Budget, Cost -CORRECTANSWER A preventative maintenance
program includes:
Lower insurance rates -CORRECTANSWER An advantage of a standpipe:
Geographic Informaton System -CORRECTANSWER What is GIS?
Cavitation (boiling) -CORRECTANSWER High flow rates in pumps can cause.
Mechanical rakes, drag chain, traveling bridges -CORRECTANSWER Three ways
sludge is removed from a settling basin are
Inlet, Outlet, Settling, Sludge -CORRECTANSWER The 4 zones of settling basin are:
Questions EXAM, /GET IT 100%
ACCURATE!! 2026!! MOST TESTED
QUESTIONS AND VERIFIED SOLUTIONS
0.08 ppm -CORRECTANSWER MCL for TTHM's
0.06 ppm -CORRECTANSWER MCL for HAA5's
0.01 ppm -CORRECTANSWER MCL for Arsenic
0.015 ppm -CORRECTANSWER MCL for Lead
90 days -CORRECTANSWER Turbidity meter must be calibrated every:
Less than 0.3 for 95% of the time. -CORRECTANSWER MCL for turbidity is
2 buffers -CORRECTANSWER pH meters must be calibrated using
Algae blooms -CORRECTANSWER A grassy of fishy taste in reservoir water indicates
Improper backwashing of filters -CORRECTANSWER Mudballs are caused by
,Carbonate -CORRECTANSWER Lime can only be used to soften water with
0 ppm -CORRECTANSWER Water leaving Zeolite softener has a hardness of
Schmutzdecke -CORRECTANSWER The top layer of a slow sand filter is called the
Coagulation, flocculation, sedimentation -CORRECTANSWER A solids contact unit
combines
4 ppm, 2 ppm -CORRECTANSWER The PMCL for fluoride is: The SMCL is:
Warmer -CORRECTANSWER Flock will settle better in warm or cool water?
High pH -CORRECTANSWER The greensand manganese removal process requires a:
Volatile organic compounds & gases (odor) -CORRECTANSWER Aeration releases
what from water?
Amperomatic tiration -CORRECTANSWER The most accurate method of determining
chlorine residual is:
Sulfuric acid -CORRECTANSWER An alkalinity sample is titrated using
, Mixing and measuring -CORRECTANSWER A beaker is used for
Nephelometric turbidity units -CORRECTANSWER NTU stands for:
5 years, 10 years -CORRECTANSWER Bacteria results must be kept for: Chem results
for:
Tubrbine, Propeller, Venturi, Nutating discs -CORRECTANSWER Four ways water
meters operate are:
Procedure, Part, Budget, Cost -CORRECTANSWER A preventative maintenance
program includes:
Lower insurance rates -CORRECTANSWER An advantage of a standpipe:
Geographic Informaton System -CORRECTANSWER What is GIS?
Cavitation (boiling) -CORRECTANSWER High flow rates in pumps can cause.
Mechanical rakes, drag chain, traveling bridges -CORRECTANSWER Three ways
sludge is removed from a settling basin are
Inlet, Outlet, Settling, Sludge -CORRECTANSWER The 4 zones of settling basin are:
