WASTEWATER CLASS B TEXAS
CERTIFICATION EVALUATION EXAMS 2026
SOLVED QUESTIONS AND SOLUTIONS
GRADED A+
⩥ The definition of an oxygen-deficient atmosphere is one that contains
less than, what percentage of oxygen? Answer: 19.5
⩥ 1.) What is the function of a grit auger? Answer: To Separate Organic
from Inorganics
⩥ 2.) Running a 30 min settling test is the best indication of what?
Answer: What is taking place in the Clarifier.
⩥ 3.) How many inches do you pour a sludge drying bed? Answer: 8 to
12
⩥ 4.) Why do you draw sludge into the drying bed at a slow rate?
Answer: To promote drying of the sludge.
⩥ 5.) In the F/M ratio what does the food stand for? Answer: Organics
,⩥ 6.) What can chlorine be used for in a trickiling filter? Answer:
Reduce Ponding
⩥ 7.) One part of liquid chlorine equals how much of Gas? Answer: 450
⩥ 8.) What is the purpose of a pretreatment program? Answer: To cut
cost and help with plant efficiency
⩥ 9.) In a composite sample there was a Cl2 sample ran and there was
no residual present, what does that say about the sample? Answer:
Inaccurate, Cl2 test is within 15 min, not 24 hours later
⩥ 10.) In order to be a good communicator, what else do you need to be?
Answer: Listener
⩥ 11.) During Nitrification, which organisms use ______ for food?
Answer: Nitrates
⩥ In an Activated Sludge Treatment Process what is the most
predominant organism? Answer: Ciliates and rotifers with few
flagellates.
⩥ The Detention Time in a Contact Stabilization plant is _____ than
other extended aeration plants. Answer: Longer
, ⩥ 14.) Other than disinfection chlorination can be used for what?
Answer: Odor Control, Foaming, Reduce Algae Growth
⩥ 15.) A leaking chlorine cylinder will do what? Answer: Have a frosty
coated outside
⩥ 16.) Who has the right to training and education? Answer: Everyone
⩥ 17.) When connecting a potable water line to a wastewater pump for
cooling, what do you need to put in place? Answer: Check Valve
⩥ What is the expected % of removal of the settable solids from a
primary clarifier? Answer: 90% to 99%)
⩥ 19.) Manholes should be placed where? Answer: Every 500ft, change
in elevation, pipe size or all of the above
⩥ 20.) A high SVI would represent what about your sludge? Answer:
Bulking sludge
⩥ 21.) Grinder pumps are considered for what? Answer: A vital part of
the collection system
CERTIFICATION EVALUATION EXAMS 2026
SOLVED QUESTIONS AND SOLUTIONS
GRADED A+
⩥ The definition of an oxygen-deficient atmosphere is one that contains
less than, what percentage of oxygen? Answer: 19.5
⩥ 1.) What is the function of a grit auger? Answer: To Separate Organic
from Inorganics
⩥ 2.) Running a 30 min settling test is the best indication of what?
Answer: What is taking place in the Clarifier.
⩥ 3.) How many inches do you pour a sludge drying bed? Answer: 8 to
12
⩥ 4.) Why do you draw sludge into the drying bed at a slow rate?
Answer: To promote drying of the sludge.
⩥ 5.) In the F/M ratio what does the food stand for? Answer: Organics
,⩥ 6.) What can chlorine be used for in a trickiling filter? Answer:
Reduce Ponding
⩥ 7.) One part of liquid chlorine equals how much of Gas? Answer: 450
⩥ 8.) What is the purpose of a pretreatment program? Answer: To cut
cost and help with plant efficiency
⩥ 9.) In a composite sample there was a Cl2 sample ran and there was
no residual present, what does that say about the sample? Answer:
Inaccurate, Cl2 test is within 15 min, not 24 hours later
⩥ 10.) In order to be a good communicator, what else do you need to be?
Answer: Listener
⩥ 11.) During Nitrification, which organisms use ______ for food?
Answer: Nitrates
⩥ In an Activated Sludge Treatment Process what is the most
predominant organism? Answer: Ciliates and rotifers with few
flagellates.
⩥ The Detention Time in a Contact Stabilization plant is _____ than
other extended aeration plants. Answer: Longer
, ⩥ 14.) Other than disinfection chlorination can be used for what?
Answer: Odor Control, Foaming, Reduce Algae Growth
⩥ 15.) A leaking chlorine cylinder will do what? Answer: Have a frosty
coated outside
⩥ 16.) Who has the right to training and education? Answer: Everyone
⩥ 17.) When connecting a potable water line to a wastewater pump for
cooling, what do you need to put in place? Answer: Check Valve
⩥ What is the expected % of removal of the settable solids from a
primary clarifier? Answer: 90% to 99%)
⩥ 19.) Manholes should be placed where? Answer: Every 500ft, change
in elevation, pipe size or all of the above
⩥ 20.) A high SVI would represent what about your sludge? Answer:
Bulking sludge
⩥ 21.) Grinder pumps are considered for what? Answer: A vital part of
the collection system
