CA Grade 2 Wastewater Treatment Operator Practice Test Questions and Answers

CA Grade 2 Wastewater Treatment Operator
Practice Test Questions and Answers
Question 1
What should be done if filamentous organisms become a problem in the mixed
liquor?
Correct Answer
increase DO in aeration tank



Question 2
Preventative maintenence is a proactive, programmed, and......
Correct Answer
systematic approach to maintenance



Question 3
Abnormal operation in a pond will not occur if it is overloaded with BOD
Correct Answer
F



Question 4
In domestic wastewater system, how many pounds of oxygen are used each day by
the microorganisms for each person using the system?
Correct Answer
.17 lbs/day/person (roughly equal to .2 lb/day/person)



Question 5
Anaerobic decomposition of sweage will release?
Correct Answer
hydrogen sulfide




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, Question 6
Chlorine gas is brown in color
Correct Answer
False = yellow green



Question 7
A manhole, sump, or vault can be entered without following confined space entry
procedures......
Correct Answer
if it appears safe



Question 8
Which of the following is used to dewater sludge?
Correct Answer
drying bed, centrifuge, vacuum filter



Question 9
One of the benefits of recirculation for a trickling filter is that it drcreses the contact
time of the wastewater with the biological film
Correct Answer
F



Question 10
Poor ventilation of a trickling filter could lead to what?
Correct Answer
lead to odor problems




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