TEXAS WASTEWATER B Exam Question and
Answer 2026 | Ultimate Exam Preparation
Bundle | Grade A+
• A licensed wastewater operator is a professional. CORRECT ANSWER: consistently
does best job possible, practices personal safety, strives to improve job knowledge,
strives to keep the plant and collection system in the best appearance and working
order
• An important step in testing a sample for Total Suspended Solids is. CORRECT
ANSWER: Filtering a sample
• The Biochemical oxygen Demand (BOD) of a sample is based on. CORRECT
ANSWER: Measuring the dissolved oxygen (DO) used
• The results of Biochemical Oxygen Demand (BOD) sample taken at a treatment plant
tells the operator. CORRECT ANSWER: How the plant was operating 5 days ago
• Which of the following are dangerous gasses that are likely to be present in lift stations
and manholes?. CORRECT ANSWER: Natural gas, gasoline fumes, hydrogen sulfide
and carbon dioxide
• A preferred hydraulic method of cleaning sewer lines is. CORRECT ANSWER: Hydro
Jet Cleaner
• Ways to reduce bad odors coming from a collection system. CORRECT ANSWER:
routinely cleaning slow running or low flow lines, adding chlorine or hydrogen peroxide
to the collection system
• Types of pipe that are commonly used in wastewater collection system. CORRECT
ANSWER: ductile iron, Poly Vinyl Chloride (PVC)
• Before entering a confined space a worker should. CORRECT ANSWER: Use
approved monitoring device and check for the presence of dangerous gasses, ventilate
the space with a blower, wear a safety harness and attach a life line
• A properly designed and operated primary sedimentation tank should remove _____
percent of incoming BOD. CORRECT ANSWER: 30-40%
• Devices that may be used to determine the level of sewage in a lift station. CORRECT
ANSWER: air bubbler, floats, electrodes, Acoustic (sonic)
• What is the most important role of aerobic bacteria in the treatment of wastewater?.
CORRECT ANSWER: decompose organic matter
, • The hydraulic loading of a trickling filter may be determined by. CORRECT ANSWER:
flow rate and filter area
• These can be used to dewater sludge. CORRECT ANSWER: belt press, drying beds,
solid bowl centrifuge, gravity thickener
• Most important to providing adequate sewage treatment in a stabilization pond.
CORRECT ANSWER: sunlight, algae, bacteria and time
• Offensive and objectionable odors which sometimes occur in trickling filters usually
indicate. CORRECT ANSWER: septic conditions are present
• Dissolved Oxygen (DO) in aeration tank of an activated sludge plant should be
maintained at or about. CORRECT ANSWER: 2 to 4 mg/L
• Contributes to the infiltration in a collection system. CORRECT ANSWER: breaks in
the main lines, high ground water levels, heavy rains, hydro jet cleaning plugged mains
• When a centrifuge pump loses prime the. CORRECT ANSWER: pump is no longer
moving liquid
• A Rotating Biological Contactor (RBC) is. CORRECT ANSWER: fixed firm biological
treatment process
• Needs to be checked regularly to properly operate an activated sludge treatment plant.
CORRECT ANSWER: aeration equipment and mixed liquor solids
• Point source discharges are. CORRECT ANSWER: discharges that come from pipes
or ditches that are monitored, controlled and inspected
• Non-point discharges are. CORRECT ANSWER: discharges that have intermittent,
dispersed flows having little or no control
• The Texas Water Code establishes the protection of water quality and quantity of the
state by. CORRECT ANSWER: setting stream standards, issues permits for discharges,
identifies non-point source controls, and establishes water reuse.
• The wastewater plant operator is primarily responsible for. CORRECT ANSWER:
treating wastewater discharged into the community
• Chapter ___ of the Texas Water Code is the state law controlling water pollution and
___ authority to control discharges in Texas. CORRECT ANSWER: Chapter 26 and
Texas Commission of Environmental Quality
Answer 2026 | Ultimate Exam Preparation
Bundle | Grade A+
• A licensed wastewater operator is a professional. CORRECT ANSWER: consistently
does best job possible, practices personal safety, strives to improve job knowledge,
strives to keep the plant and collection system in the best appearance and working
order
• An important step in testing a sample for Total Suspended Solids is. CORRECT
ANSWER: Filtering a sample
• The Biochemical oxygen Demand (BOD) of a sample is based on. CORRECT
ANSWER: Measuring the dissolved oxygen (DO) used
• The results of Biochemical Oxygen Demand (BOD) sample taken at a treatment plant
tells the operator. CORRECT ANSWER: How the plant was operating 5 days ago
• Which of the following are dangerous gasses that are likely to be present in lift stations
and manholes?. CORRECT ANSWER: Natural gas, gasoline fumes, hydrogen sulfide
and carbon dioxide
• A preferred hydraulic method of cleaning sewer lines is. CORRECT ANSWER: Hydro
Jet Cleaner
• Ways to reduce bad odors coming from a collection system. CORRECT ANSWER:
routinely cleaning slow running or low flow lines, adding chlorine or hydrogen peroxide
to the collection system
• Types of pipe that are commonly used in wastewater collection system. CORRECT
ANSWER: ductile iron, Poly Vinyl Chloride (PVC)
• Before entering a confined space a worker should. CORRECT ANSWER: Use
approved monitoring device and check for the presence of dangerous gasses, ventilate
the space with a blower, wear a safety harness and attach a life line
• A properly designed and operated primary sedimentation tank should remove _____
percent of incoming BOD. CORRECT ANSWER: 30-40%
• Devices that may be used to determine the level of sewage in a lift station. CORRECT
ANSWER: air bubbler, floats, electrodes, Acoustic (sonic)
• What is the most important role of aerobic bacteria in the treatment of wastewater?.
CORRECT ANSWER: decompose organic matter
, • The hydraulic loading of a trickling filter may be determined by. CORRECT ANSWER:
flow rate and filter area
• These can be used to dewater sludge. CORRECT ANSWER: belt press, drying beds,
solid bowl centrifuge, gravity thickener
• Most important to providing adequate sewage treatment in a stabilization pond.
CORRECT ANSWER: sunlight, algae, bacteria and time
• Offensive and objectionable odors which sometimes occur in trickling filters usually
indicate. CORRECT ANSWER: septic conditions are present
• Dissolved Oxygen (DO) in aeration tank of an activated sludge plant should be
maintained at or about. CORRECT ANSWER: 2 to 4 mg/L
• Contributes to the infiltration in a collection system. CORRECT ANSWER: breaks in
the main lines, high ground water levels, heavy rains, hydro jet cleaning plugged mains
• When a centrifuge pump loses prime the. CORRECT ANSWER: pump is no longer
moving liquid
• A Rotating Biological Contactor (RBC) is. CORRECT ANSWER: fixed firm biological
treatment process
• Needs to be checked regularly to properly operate an activated sludge treatment plant.
CORRECT ANSWER: aeration equipment and mixed liquor solids
• Point source discharges are. CORRECT ANSWER: discharges that come from pipes
or ditches that are monitored, controlled and inspected
• Non-point discharges are. CORRECT ANSWER: discharges that have intermittent,
dispersed flows having little or no control
• The Texas Water Code establishes the protection of water quality and quantity of the
state by. CORRECT ANSWER: setting stream standards, issues permits for discharges,
identifies non-point source controls, and establishes water reuse.
• The wastewater plant operator is primarily responsible for. CORRECT ANSWER:
treating wastewater discharged into the community
• Chapter ___ of the Texas Water Code is the state law controlling water pollution and
___ authority to control discharges in Texas. CORRECT ANSWER: Chapter 26 and
Texas Commission of Environmental Quality
