California Wastewater Treatment Operator Grade V
Exam ACTUAL Exam ALL 250 QUESTIONS AND
CORRECT ANSWERS LATEST UPDATE THIS
YEAR(2026/2027)
What are the two important factors impacting the
effectiveness of chlorination? - ANSWER-Concentration of
chlorine and contact time
The treatment process that controls corrosion or scaling is
known as what? - ANSWER-Stabilization
, Permanganate reactions are highly dependent on what
factor? - ANSWER-pH
It is hardest to kill the organism that causes what illness? -
ANSWER-Cryptosporidiosis
Disinfection of water wells with free chlorine requires
exposure for how long and at what concentration? -
ANSWER-12 to 24 hours; 50mg/L
Flocculation basins are usually designed to provide for
detention times of how long? - ANSWER-15 to 45 minutes
Exam ACTUAL Exam ALL 250 QUESTIONS AND
CORRECT ANSWERS LATEST UPDATE THIS
YEAR(2026/2027)
What are the two important factors impacting the
effectiveness of chlorination? - ANSWER-Concentration of
chlorine and contact time
The treatment process that controls corrosion or scaling is
known as what? - ANSWER-Stabilization
, Permanganate reactions are highly dependent on what
factor? - ANSWER-pH
It is hardest to kill the organism that causes what illness? -
ANSWER-Cryptosporidiosis
Disinfection of water wells with free chlorine requires
exposure for how long and at what concentration? -
ANSWER-12 to 24 hours; 50mg/L
Flocculation basins are usually designed to provide for
detention times of how long? - ANSWER-15 to 45 minutes
