TEXAS CLASS C WASTEWATER TREATMENT
LICENSE TEST 2026-2027 EXAM QUESTIONS
ACCURATE ACTUAL EXAM / FREQUENTLY TESTED
QUESTIONS WITH DETAILED ANSWERS |
GUARANTEED PASS | GRADED A+ | BRAND NEW!!
Preliminary Treatment - ANSWER-the 1st stage of sewage
treatment where large debris, such as sticks, grit, and rags
pas through a screen followed by a grit chamber, where
the flow of water is slowed enough to allow for
sedimentation.
What happens when the return sludge rate is too low? -
....ANSWER...there will be insufficient organisms to treat
the waste load entering the aeration basin and the sludge
blanket in the secondary clarifier could become too high
,Physical causes of sludge bulking are... -
....ANSWER...excessive hydraulic loading, settled sludge
that is not promptly removed from the clarifier, inadequate
weir lengths and improper ratio of depth to surface area of
the final clarifier
How deep should the clarifier blanket be? -
....ANSWER...filling the bottom 1/4
,Weir loadings should not exceed _________
gal/day/linear foot of weir at peak flow (1 MGD or less
plant). -
....ANSWER...20,000
Weir loadings should not exceed ___________
,gal/day/linear foot of weir at peak flow (1 MGD or above
plant). - ....ANSWER...30,000
Is activated sludge aerobic or anaerobic? -
....ANSWER...aerobic
Why do pumps continually send RAS to the aeration
tank? - ....ANSWER...to reseed the biological reaction in
the aeration tank and remove accumulating sludge from
the clarifier
How much raw influent should return pumps be able to
provide? - ....ANSWER...50-150%
For an activated sludge process to work properly, an
operator much insure that... - ....ANSWER...enough
, return activated sludge is sent tot he aerator to maintain
the process; solids do not accumulate in the clarifier;
excess,solids that develop in the process are removed
frequently
enough to avoid build-up
During normal operations, the __________ will
concentrate sludge, making it 2-4 times denser than that
of the mixed liquor. - ....ANSWER...clarifier
Define F/M ratio - ....ANSWER...food to microorganism
ratio
How is F/M ratio calculated? - ....ANSWER...by dividing
the pounds of incoming BOD (food) by the pounds of
MLVSS (microorganisms) in the aeration tank
LICENSE TEST 2026-2027 EXAM QUESTIONS
ACCURATE ACTUAL EXAM / FREQUENTLY TESTED
QUESTIONS WITH DETAILED ANSWERS |
GUARANTEED PASS | GRADED A+ | BRAND NEW!!
Preliminary Treatment - ANSWER-the 1st stage of sewage
treatment where large debris, such as sticks, grit, and rags
pas through a screen followed by a grit chamber, where
the flow of water is slowed enough to allow for
sedimentation.
What happens when the return sludge rate is too low? -
....ANSWER...there will be insufficient organisms to treat
the waste load entering the aeration basin and the sludge
blanket in the secondary clarifier could become too high
,Physical causes of sludge bulking are... -
....ANSWER...excessive hydraulic loading, settled sludge
that is not promptly removed from the clarifier, inadequate
weir lengths and improper ratio of depth to surface area of
the final clarifier
How deep should the clarifier blanket be? -
....ANSWER...filling the bottom 1/4
,Weir loadings should not exceed _________
gal/day/linear foot of weir at peak flow (1 MGD or less
plant). -
....ANSWER...20,000
Weir loadings should not exceed ___________
,gal/day/linear foot of weir at peak flow (1 MGD or above
plant). - ....ANSWER...30,000
Is activated sludge aerobic or anaerobic? -
....ANSWER...aerobic
Why do pumps continually send RAS to the aeration
tank? - ....ANSWER...to reseed the biological reaction in
the aeration tank and remove accumulating sludge from
the clarifier
How much raw influent should return pumps be able to
provide? - ....ANSWER...50-150%
For an activated sludge process to work properly, an
operator much insure that... - ....ANSWER...enough
, return activated sludge is sent tot he aerator to maintain
the process; solids do not accumulate in the clarifier;
excess,solids that develop in the process are removed
frequently
enough to avoid build-up
During normal operations, the __________ will
concentrate sludge, making it 2-4 times denser than that
of the mixed liquor. - ....ANSWER...clarifier
Define F/M ratio - ....ANSWER...food to microorganism
ratio
How is F/M ratio calculated? - ....ANSWER...by dividing
the pounds of incoming BOD (food) by the pounds of
MLVSS (microorganisms) in the aeration tank
