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Wastewater Treatment Operator Certification Exam 2023-2024 | Actual Exam Questions and Answers | Latest Version | (Verified Answers)

Wastewater Treatment Operator Certification Exam 2023-2024 | Actual Exam Questions and Answers | Latest Version | (Verified Answers)

What is common practice in an activated sludge process?
A) Waste all activated sludge
B) Sludge age of 14 days for conventional system
C) Recirculate activated sludge (RAS)
D) Limiting DO to increase the mircoorganism population -----CORRECT ANSWER------
--C) Recirculate activated sludge (RAS) (v.2 pg 20,21)
Prior to entering a permit required confined space, what should you verify?
A) a standby person should be at the entrance to the confined space. An additional
person is not required
B) A standby person should be within 30 feet of the confined space.
C) A standby person should be within 50 feet of the confined space.
D) 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. -----
CORRECT ANSWER--------D) 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. (v.2 pg 270)
What is a common way to determine the organic strength of wastes in the influent?
A) Test for the biochemical oxygen demand
B) Test for the biological oxygen demand
C) Test for the volatile solids reduction
D) Test for the carbon and hydrogen concentrations -----CORRECT ANSWER--------A)
Test for the biochemical oxygen demand (v.1 pg 505)
What should you do if you are mildly exposed to chlorine gas?
A) Breathe heavily to inhale clean air
B) Cough to release chlorine from lungs
C) Immediately evacuate the contaminated area, remain calm, keep warm, breathe
lightly, and avoid coughing
D) Keep your body as cool as possible -----CORRECT ANSWER--------C) Immediately
evacuate the contaminated area, remain calm, keep warm, breathe lightly, and avoid
coughing (v.1 pg 377)

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