CA WASTEWATER TREATMENT OPERATOR
GRADE 2 PRACTICE TEST EXAM 1 LATEST
2026/2027 ALL STUDY QUESTIONS WITH
CORRECT SOLUTIONS GUARANTEED PASS
TOP RATED
, CA WASTEWATER TREATMENT OPERATOR GRADE 2
PRACTICE TEST EXAM 1 LATEST 2026/2027 ALL STUDY
QUESTIONS WITH CORRECT SOLUTIONS GUARANTEED
PASS TOP RATED
Which of the following best describes pre-chlorination? - Answer>>> addition of chlorine to
wastewater at the entrance to the plant used for odor control, BOD reduction, grease removal,
and aid sedimentation
Which is true about the temperature in an anaerobic digester? - Answer>>> Temperature in a
digester should not be changed by more than 1 degree Fahrenheit per day
Why should sludge at the bottom of a clarifier be removed in a timely manner? - Answer>>> to
prevent sludge gasification which causes the sludge to float
What does black sludge at the bottom of a secondary clarifier located downstream of a trickling
filter signify? - Answer>>> sludge has stayed in the secondary clarifier too long
Which of the following is one of the basic rules of lab work? - Answer>>> never pipet hazardous
material with your mouth, even if the pipet has been sterialized
Prior to entering a permit-required confined space, what should you verify? - Answer>>> a
standby person should be located outside the entrance to the confined space, while another
person should be within sight or call of the standby person
What is a common way to determine the organic strength of wastes in the influent? - Answer>>>
test for the biochemical oxygen demand
What is the recirculation ratio for a trickling filter? - Answer>>> Qr/Q
A pond with a detention time of less than three days will perform similar to? - Answer>>>
sedimentation tank
Which type of bacteria is used for trickling filters? - Answer>>> aerobic bacteria
Which of the following is not associated with a trickling filter? - Answer>>> filamentous
bacteria
GRADE 2 PRACTICE TEST EXAM 1 LATEST
2026/2027 ALL STUDY QUESTIONS WITH
CORRECT SOLUTIONS GUARANTEED PASS
TOP RATED
, CA WASTEWATER TREATMENT OPERATOR GRADE 2
PRACTICE TEST EXAM 1 LATEST 2026/2027 ALL STUDY
QUESTIONS WITH CORRECT SOLUTIONS GUARANTEED
PASS TOP RATED
Which of the following best describes pre-chlorination? - Answer>>> addition of chlorine to
wastewater at the entrance to the plant used for odor control, BOD reduction, grease removal,
and aid sedimentation
Which is true about the temperature in an anaerobic digester? - Answer>>> Temperature in a
digester should not be changed by more than 1 degree Fahrenheit per day
Why should sludge at the bottom of a clarifier be removed in a timely manner? - Answer>>> to
prevent sludge gasification which causes the sludge to float
What does black sludge at the bottom of a secondary clarifier located downstream of a trickling
filter signify? - Answer>>> sludge has stayed in the secondary clarifier too long
Which of the following is one of the basic rules of lab work? - Answer>>> never pipet hazardous
material with your mouth, even if the pipet has been sterialized
Prior to entering a permit-required confined space, what should you verify? - Answer>>> a
standby person should be located outside the entrance to the confined space, while another
person should be within sight or call of the standby person
What is a common way to determine the organic strength of wastes in the influent? - Answer>>>
test for the biochemical oxygen demand
What is the recirculation ratio for a trickling filter? - Answer>>> Qr/Q
A pond with a detention time of less than three days will perform similar to? - Answer>>>
sedimentation tank
Which type of bacteria is used for trickling filters? - Answer>>> aerobic bacteria
Which of the following is not associated with a trickling filter? - Answer>>> filamentous
bacteria
