2/16/25, 5:04 PM Wastewater Exam Class C (2025) comprehensive questions and verified detailed solutions ( MULTIPLE CHOICES) |100% CO…
Wastewater Exam Class C (2025)
comprehensive questions and verified detailed
solutions ( MULTIPLE CHOICES) |100%
CORRECT!!
Save
Terms in this set (59)
The Activated Sludge C. Is an Aerobic biological process
Process:
A. requires preaeration
B. requires Activated
Carbon
C. is an aerobic
biological process.
D. Usually precedes
primary sedimentation.
E. Requires 50% by
volume old sludge to
work effectively.
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,2/16/25, 5:04 PM Wastewater Exam Class C (2025) comprehensive questions and verified detailed solutions ( MULTIPLE CHOICES) |100% CO…
A complete mix activated D. Increase the F/M Ratio by Wasting More
sludge plant has a fast
settling sludge and high
amounts of pin floc
leaving the clarifier. One
way to correct this
problem is to :
A. Increase the RAS Flow
B. Reduce Wasting Rates
C. Increase dissolved
oxygen levels.
D. Increase the F/M ratio
by wasting more
E. Increase the sludge
age by wasting less.
Which of the following E. all the above
flow rates should be
measured if the operator
is to control plant
properly?
A. Aeration rate or
resulting dissolved
oxygen level.
B. Influent or effluent.
C. return sludge
D. waste sludge
E. all the above
https://quizlet.com/1006514324/wastewater-exam-class-c-2025-comprehensive-questions-and-verified-detailed-solutions-multiple-choices-100-c… 2/20
, 2/16/25, 5:04 PM Wastewater Exam Class C (2025) comprehensive questions and verified detailed solutions ( MULTIPLE CHOICES) |100% CO…
During start up your C. Seeding the process with sufficient good quality
aeration tank produces sludge
excessive amounts of
billowing white foam. This
can be corrected by:
A. Doing nothing, it will
go away in a few hours
B. Increasing the sludge
wasting rate
C. Seeding the process
with sufficient good
quality sludge
D. Spraying water on the
foam until it is gone
E. Taking a weeks
vacation
https://quizlet.com/1006514324/wastewater-exam-class-c-2025-comprehensive-questions-and-verified-detailed-solutions-multiple-choices-100-c… 3/20
Wastewater Exam Class C (2025)
comprehensive questions and verified detailed
solutions ( MULTIPLE CHOICES) |100%
CORRECT!!
Save
Terms in this set (59)
The Activated Sludge C. Is an Aerobic biological process
Process:
A. requires preaeration
B. requires Activated
Carbon
C. is an aerobic
biological process.
D. Usually precedes
primary sedimentation.
E. Requires 50% by
volume old sludge to
work effectively.
https://quizlet.com/1006514324/wastewater-exam-class-c-2025-comprehensive-questions-and-verified-detailed-solutions-multiple-choices-100-c… 1/20
,2/16/25, 5:04 PM Wastewater Exam Class C (2025) comprehensive questions and verified detailed solutions ( MULTIPLE CHOICES) |100% CO…
A complete mix activated D. Increase the F/M Ratio by Wasting More
sludge plant has a fast
settling sludge and high
amounts of pin floc
leaving the clarifier. One
way to correct this
problem is to :
A. Increase the RAS Flow
B. Reduce Wasting Rates
C. Increase dissolved
oxygen levels.
D. Increase the F/M ratio
by wasting more
E. Increase the sludge
age by wasting less.
Which of the following E. all the above
flow rates should be
measured if the operator
is to control plant
properly?
A. Aeration rate or
resulting dissolved
oxygen level.
B. Influent or effluent.
C. return sludge
D. waste sludge
E. all the above
https://quizlet.com/1006514324/wastewater-exam-class-c-2025-comprehensive-questions-and-verified-detailed-solutions-multiple-choices-100-c… 2/20
, 2/16/25, 5:04 PM Wastewater Exam Class C (2025) comprehensive questions and verified detailed solutions ( MULTIPLE CHOICES) |100% CO…
During start up your C. Seeding the process with sufficient good quality
aeration tank produces sludge
excessive amounts of
billowing white foam. This
can be corrected by:
A. Doing nothing, it will
go away in a few hours
B. Increasing the sludge
wasting rate
C. Seeding the process
with sufficient good
quality sludge
D. Spraying water on the
foam until it is gone
E. Taking a weeks
vacation
https://quizlet.com/1006514324/wastewater-exam-class-c-2025-comprehensive-questions-and-verified-detailed-solutions-multiple-choices-100-c… 3/20
