Wastewater Class B Texas | QUESTIONS AND ANSWERS |
2025/2026
The name of the State Agency responsible for enforcing Texas Commission of Environmental Quality
pollution control laws in Texas
The term pathogenic means Capable of causing disease
The minimum separation between sewer lines and potable 9 feet
water lines is
A licensed wastewater operator is a professional 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 Filtering a sample
Solids is
The Biochemical oxygen Demand (BOD) of a sample is Measuring the dissolved oxygen (DO) used
based on
The results of Biochemical Oxygen Demand (BOD) How the plant was operating 5 days ago
sample taken at a treatment plant tells the operator
Which of the following are dangerous gasses that are Natural gas, gasoline fumes, hydrogen sulfide and carbon dioxide
likely to be present in lift stations and manholes?
A preferred hydraulic method of cleaning sewer lines is Hydro Jet Cleaner
Ways to reduce bad odors coming from a collection routinely cleaning slow running or low flow lines, adding chlorine or hydrogen
system peroxide to the collection system
, Types of pipe that are commonly used in wastewater ductile iron, Poly Vinyl Chloride (PVC)
collection system
Before entering a confined space a worker should 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 30-40%
tank should remove___percent of incoming BOD
Devices that may be used to determine the level of air bubbler, floats, electrodes, Acoustic (sonic)
sewage in a lift station
What is the most important role of aerobic bacteria in the decompose organic matter
treatment of wastewater?
The hydraulic loading of a trickling filter may be flow rate and filter area
determined by
These can be used to dewater sludge belt press, drying beds, solid bowl centrifuge, gravity thickener
Most important to providing adequate sewage treatment sunlight, algae, bacteria and time
in a stabilization pond
Offensive and objectionable odors which sometimes septic conditions are present
occur in trickling filters usually indicate
Dissolved Oxygen (DO) in aeration tank of an activated 2 to 4 mg/L
sludge plant should be maintained at or about
Contributes to the infiltration in a collection system breaks in the main lines, high ground water levels, heavy rains, hydro jet cleaning
plugged mains
When a centrifuge pump loses prime the pump is no longer moving liquid
A Rotating Biological Contactor (RBC) is fixed firm biological treatment process
Needs to be checked regularly to properly operate an aeration equipment and mixed liquor solids
activated sludge treatment plant
Point source discharges are discharges that come from pipes or ditches that are monitored, controlled and
inspected
Non-point discharges are discharges that have intermittent, dispersed flows having little or no control
The Texas Water Code establishes the protection of water setting stream standards, issues permits for discharges, identifies non-point source
quality and quantity of the state by controls, and establishes water reuse.
The wastewater plant operator is primarily responsible for treating wastewater discharged into the community
2025/2026
The name of the State Agency responsible for enforcing Texas Commission of Environmental Quality
pollution control laws in Texas
The term pathogenic means Capable of causing disease
The minimum separation between sewer lines and potable 9 feet
water lines is
A licensed wastewater operator is a professional 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 Filtering a sample
Solids is
The Biochemical oxygen Demand (BOD) of a sample is Measuring the dissolved oxygen (DO) used
based on
The results of Biochemical Oxygen Demand (BOD) How the plant was operating 5 days ago
sample taken at a treatment plant tells the operator
Which of the following are dangerous gasses that are Natural gas, gasoline fumes, hydrogen sulfide and carbon dioxide
likely to be present in lift stations and manholes?
A preferred hydraulic method of cleaning sewer lines is Hydro Jet Cleaner
Ways to reduce bad odors coming from a collection routinely cleaning slow running or low flow lines, adding chlorine or hydrogen
system peroxide to the collection system
, Types of pipe that are commonly used in wastewater ductile iron, Poly Vinyl Chloride (PVC)
collection system
Before entering a confined space a worker should 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 30-40%
tank should remove___percent of incoming BOD
Devices that may be used to determine the level of air bubbler, floats, electrodes, Acoustic (sonic)
sewage in a lift station
What is the most important role of aerobic bacteria in the decompose organic matter
treatment of wastewater?
The hydraulic loading of a trickling filter may be flow rate and filter area
determined by
These can be used to dewater sludge belt press, drying beds, solid bowl centrifuge, gravity thickener
Most important to providing adequate sewage treatment sunlight, algae, bacteria and time
in a stabilization pond
Offensive and objectionable odors which sometimes septic conditions are present
occur in trickling filters usually indicate
Dissolved Oxygen (DO) in aeration tank of an activated 2 to 4 mg/L
sludge plant should be maintained at or about
Contributes to the infiltration in a collection system breaks in the main lines, high ground water levels, heavy rains, hydro jet cleaning
plugged mains
When a centrifuge pump loses prime the pump is no longer moving liquid
A Rotating Biological Contactor (RBC) is fixed firm biological treatment process
Needs to be checked regularly to properly operate an aeration equipment and mixed liquor solids
activated sludge treatment plant
Point source discharges are discharges that come from pipes or ditches that are monitored, controlled and
inspected
Non-point discharges are discharges that have intermittent, dispersed flows having little or no control
The Texas Water Code establishes the protection of water setting stream standards, issues permits for discharges, identifies non-point source
quality and quantity of the state by controls, and establishes water reuse.
The wastewater plant operator is primarily responsible for treating wastewater discharged into the community
