Water Treatment Plant Operations
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Anionic Polymers - CORRECT ANSWER Used to agglomerate small floc particles in
sedimentation basin effluent to make them tougher to avoid
Sludge Thickening - CORRECT ANSWER Can cause solids to become resuspended or
develop taste and odors
Recovered Backwash Water - CORRECT ANSWER May be returned to the headworks if
allowed under Filter Backwash Recycle Rule
Inclined Plates Angle - CORRECT ANSWER Should be installed at 50 degrees when
using shallow depth sedimentation method
Detention Time in Flocculation Basins - CORRECT ANSWER Usually designed to
provide for 15-45 minutes
Optimal Floc Aggregation - CORRECT ANSWER Requires a detention time of 30
minutes
Sand Boils - CORRECT ANSWER Indicate not enough backwash water being reused or
the backwash valves being opened too quickly
Sequestering Manganese - CORRECT ANSWER Best done with polyphosphates and
chlorine
Detention Time in a Conventional Detention Basin - CORRECT ANSWER Minimum is 4
hours
, Plant Growth in Reservoir - CORRECT ANSWER Usually found at a depth of 12-22 feet
Soluble Iron Removal - CORRECT ANSWER Best done by installing a manganese
greensand filter and regenerating with potassium permanganate using a chemical feeder
Chemical Encouraging Algae Growth - CORRECT ANSWER Zinc Orthophosphates
Zeta Potential - CORRECT ANSWER Measures the number of excess electrons found on
the surface of all particular matter
Coagulation - CORRECT ANSWER Chemical combination for substances in solution to
cause separation in the insoluble form
Sludge Removal Level - CORRECT ANSWER Should be removed when reaching a level
of 3%
Solids Removal Processing - CORRECT ANSWER Normal sequence is Coagulation,
Flocculation, Sedimentation, and Filtration
Water Source Vulnerability - CORRECT ANSWER Can be declared by a contractor or
consultant, the state, or the water purveyor
Multiple Barrier Treatment - CORRECT ANSWER Under the Surface Water Treatment
Rule consists of removal by filtration and inactivation by disinfection
Removal of Disinfection By Products - CORRECT ANSWER Most effective method is
Granular Activated Carbon
Emergency Kit for Chlorine Tanker - CORRECT ANSWER Kit B
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Anionic Polymers - CORRECT ANSWER Used to agglomerate small floc particles in
sedimentation basin effluent to make them tougher to avoid
Sludge Thickening - CORRECT ANSWER Can cause solids to become resuspended or
develop taste and odors
Recovered Backwash Water - CORRECT ANSWER May be returned to the headworks if
allowed under Filter Backwash Recycle Rule
Inclined Plates Angle - CORRECT ANSWER Should be installed at 50 degrees when
using shallow depth sedimentation method
Detention Time in Flocculation Basins - CORRECT ANSWER Usually designed to
provide for 15-45 minutes
Optimal Floc Aggregation - CORRECT ANSWER Requires a detention time of 30
minutes
Sand Boils - CORRECT ANSWER Indicate not enough backwash water being reused or
the backwash valves being opened too quickly
Sequestering Manganese - CORRECT ANSWER Best done with polyphosphates and
chlorine
Detention Time in a Conventional Detention Basin - CORRECT ANSWER Minimum is 4
hours
, Plant Growth in Reservoir - CORRECT ANSWER Usually found at a depth of 12-22 feet
Soluble Iron Removal - CORRECT ANSWER Best done by installing a manganese
greensand filter and regenerating with potassium permanganate using a chemical feeder
Chemical Encouraging Algae Growth - CORRECT ANSWER Zinc Orthophosphates
Zeta Potential - CORRECT ANSWER Measures the number of excess electrons found on
the surface of all particular matter
Coagulation - CORRECT ANSWER Chemical combination for substances in solution to
cause separation in the insoluble form
Sludge Removal Level - CORRECT ANSWER Should be removed when reaching a level
of 3%
Solids Removal Processing - CORRECT ANSWER Normal sequence is Coagulation,
Flocculation, Sedimentation, and Filtration
Water Source Vulnerability - CORRECT ANSWER Can be declared by a contractor or
consultant, the state, or the water purveyor
Multiple Barrier Treatment - CORRECT ANSWER Under the Surface Water Treatment
Rule consists of removal by filtration and inactivation by disinfection
Removal of Disinfection By Products - CORRECT ANSWER Most effective method is
Granular Activated Carbon
Emergency Kit for Chlorine Tanker - CORRECT ANSWER Kit B
