Iowa Water Treatment Operator Level I Exam
2026/2027 ACTUAL QUESTIONS AND ANSWERS
LATEST VERSION!!
What is the most important reason to reduce turbidity? -
ANSWER-To remove pathogens
What is the filtration flow rate through a manganese
greensand pressure filter at 10 degrees C? - ANSWER-2
to 3 gpm/sq ft
When is a filter ripening? - ANSWER-When it becomes
more efficient in particle removal
, Virgin greensand can be regenerated by soaking the filter
bed for several hours in a chlorine solution of what? -
ANSWER-100 mg/L
What precipitates can foul a cation exchange resin? -
ANSWER-Iron and manganese
What process works best for sequestering manganese? -
ANSWER-Polyphosphates and chlorine
Adding CO2 to water is known as what? - ANSWER-
Recarbonation
2026/2027 ACTUAL QUESTIONS AND ANSWERS
LATEST VERSION!!
What is the most important reason to reduce turbidity? -
ANSWER-To remove pathogens
What is the filtration flow rate through a manganese
greensand pressure filter at 10 degrees C? - ANSWER-2
to 3 gpm/sq ft
When is a filter ripening? - ANSWER-When it becomes
more efficient in particle removal
, Virgin greensand can be regenerated by soaking the filter
bed for several hours in a chlorine solution of what? -
ANSWER-100 mg/L
What precipitates can foul a cation exchange resin? -
ANSWER-Iron and manganese
What process works best for sequestering manganese? -
ANSWER-Polyphosphates and chlorine
Adding CO2 to water is known as what? - ANSWER-
Recarbonation
