Class C Wastewater Complete Real Exam Questions and
Answers Latest 2024/2025 | Class C Water Operator License
Exam Questions and Answers Latest Updated | TCEQ Class C
Water License Exam Questions and Answers & Texas Class C
Wastewater Treatment License Exam .
When operating an activated sludge plant, Which TSS
concentration is most important for process control?
A. Primary effluent
B. Aeration tank mixed
liquor. C. Return
Sludge
D. Digester.
E. Plant influent - ANSWER-B. Aeration tank mixed liquor.
If a treatment plant has a high air flow rate and it is not
overloaded with BOD, what could be the cause of low dissolved
oxygen. - ANSWER-Leaks in the air lines, and plugged diffusers
The influent BOD is not high bu the plant appears to be
overloaded. What could be causing the problem?
A. High solids from thickeners to digester
B. High solids in belt press
,C. Supernatant from digester to aeration
D. RAS too high - ANSWER-D. RAS too high
What are some of the disadvantages of a manual bar screen? -
ANSWER-Must be cleaned often
Grease and oil can pass through a plant and cause? - ANSWER-
Pumps too clog, collect on weirs, pass through the facility and
endanger aquatic life.
After collecting a 30 Min. set, what characteristics of a true
bulking sludge would show?
A. Settles fast with a cloudy supernatant
B. Settles slowly with only a few milliliters of clear liquid at the
top
C. Sludge in bottom 1/3 with clear supernate
D. Settles slowly with fluffy sludge
E. Settles fast with clear supernate and pin floc - ANSWER-B.
Settles slowly with only a few milliliters of clear liquid at the
top
Ponds should be designed to
A. always be 10 feet deep
, B. Have an influent pipe with multiple outlets
C. Maintain lots of vegetation on slopes
D. Have trees to provide shade - ANSWER-B. Have an influent
pipe with multiple outlets
The most accurate samples showing conditions through the day
are ? Samples
collected at even intervals throughout the day i called a
____________ Sample - ANSWER-Flow weighted composite
When collecting E. Coli samples, one should?
A. Not collect on rainy or windy days
B. Do not touch the inside of the lid or bottle
C. Use bottles sterilized in a laboratory
D. Collect directly into the bottle when possible
E. All the above - ANSWER-E. All the above
Analysis of dissolved oxygen must be performed how soon after
collection? - ANSWER-Immediately
Flow measuring devices must be calibrated where? - ANSWER-
The 0" reading is at the bottom of the v-notch
Answers Latest 2024/2025 | Class C Water Operator License
Exam Questions and Answers Latest Updated | TCEQ Class C
Water License Exam Questions and Answers & Texas Class C
Wastewater Treatment License Exam .
When operating an activated sludge plant, Which TSS
concentration is most important for process control?
A. Primary effluent
B. Aeration tank mixed
liquor. C. Return
Sludge
D. Digester.
E. Plant influent - ANSWER-B. Aeration tank mixed liquor.
If a treatment plant has a high air flow rate and it is not
overloaded with BOD, what could be the cause of low dissolved
oxygen. - ANSWER-Leaks in the air lines, and plugged diffusers
The influent BOD is not high bu the plant appears to be
overloaded. What could be causing the problem?
A. High solids from thickeners to digester
B. High solids in belt press
,C. Supernatant from digester to aeration
D. RAS too high - ANSWER-D. RAS too high
What are some of the disadvantages of a manual bar screen? -
ANSWER-Must be cleaned often
Grease and oil can pass through a plant and cause? - ANSWER-
Pumps too clog, collect on weirs, pass through the facility and
endanger aquatic life.
After collecting a 30 Min. set, what characteristics of a true
bulking sludge would show?
A. Settles fast with a cloudy supernatant
B. Settles slowly with only a few milliliters of clear liquid at the
top
C. Sludge in bottom 1/3 with clear supernate
D. Settles slowly with fluffy sludge
E. Settles fast with clear supernate and pin floc - ANSWER-B.
Settles slowly with only a few milliliters of clear liquid at the
top
Ponds should be designed to
A. always be 10 feet deep
, B. Have an influent pipe with multiple outlets
C. Maintain lots of vegetation on slopes
D. Have trees to provide shade - ANSWER-B. Have an influent
pipe with multiple outlets
The most accurate samples showing conditions through the day
are ? Samples
collected at even intervals throughout the day i called a
____________ Sample - ANSWER-Flow weighted composite
When collecting E. Coli samples, one should?
A. Not collect on rainy or windy days
B. Do not touch the inside of the lid or bottle
C. Use bottles sterilized in a laboratory
D. Collect directly into the bottle when possible
E. All the above - ANSWER-E. All the above
Analysis of dissolved oxygen must be performed how soon after
collection? - ANSWER-Immediately
Flow measuring devices must be calibrated where? - ANSWER-
The 0" reading is at the bottom of the v-notch
