Wastewater Class B Texas Ques ons and answers |
Updated RATED A+ | 2026
The name of the State Agency responsible for enforcing pollu on control laws in Texas
Texas Commission of Environmental Quality
The term pathogenic means
Capable of causing disease
The minimum separa on between sewer lines and potable water lines is
9 feet
A licensed wastewater operator is a professional
consistently does best job possible, prac ces personal safety, strives to improve job knowledge,
strives to keep the plant and collec on system in the best appearance and working order
An important step in tes ng a sample for Total Suspended Solids is
Filtering a sample
The Biochemical oxygen Demand (BOD) of a sample is based on
Measuring the dissolved oxygen (DO) used
The results of Biochemical Oxygen Demand (BOD) sample taken at a treatment plant tells the
operator
How the plant was opera ng 5 days ago
Which of the following are dangerous gasses that are likely to be present in li- sta ons and
manholes?
Natural gas, gasoline fumes, hydrogen sulfide and carbon dioxide
A preferred hydraulic method of cleaning sewer lines is
Hydro Jet Cleaner
Ways to reduce bad odors coming from a collec on system
rou nely cleaning slow running or low flow lines, adding chlorine or hydrogen peroxide to the
collec on system
,Types of pipe that are commonly used in wastewater collec on system
duc le iron, Poly Vinyl Chloride (PVC)
Before entering a confined space a worker should
Use approved monitoring device and check for the presence of dangerous gasses, ven late the
space with a blower, wear a safety harness and a6ach a life line
A properly designed and operated primary sedimenta on tank should remove _____ percent of
incoming BOD
30-40%
Devices that may be used to determine the level of sewage in a li- sta on
air bubbler, floats, electrodes, Acous c (sonic)
What is the most important role of aerobic bacteria in the treatment of wastewater?
decompose organic ma6er
The hydraulic loading of a trickling filter may be determined by
flow rate and filter area
These can be used to dewater sludge
belt press, drying beds, solid bowl centrifuge, gravity thickener
Most important to providing adequate sewage treatment in a stabiliza on pond
sunlight, algae, bacteria and me
Offensive and objec onable odors which some mes occur in trickling filters usually indicate
sep c condi ons are present
Dissolved Oxygen (DO) in aera on tank of an ac vated sludge plant should be maintained at or
about
2 to 4 mg/L
Contributes to the infiltra on in a collec on 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 Rota ng Biological Contactor (RBC) is
fixed firm biological treatment process
Needs to be checked regularly to properly operate an ac vated sludge treatment plant
aera on equipment and mixed liquor solids
Point source discharges are
discharges that come from pipes or ditches that are monitored, controlled and inspected
Non-point discharges are
discharges that have intermi6ent, dispersed flows having li6le or no control
The Texas Water Code establishes the protec on of water quality and quan ty of the state by
seDng stream standards, issues permits for discharges, iden fies non-point source controls, and
establishes water reuse.
The wastewater plant operator is primarily responsible for
trea ng wastewater discharged into the community
Chapter ___ of the Texas Water Code is the state law controlling water pollu on and ___
authority to control discharges in Texas
Chapter 26 and Texas Commission of Environmental Quality
The Texas Commission on Environmental Quality can revoke an operator's license if the operator
causes permit viola on, falsifies records or neglects their duty
If accidental discharge, bypass, or spill (SSO) of wastewater occurs the responsible party MUST
no fy TCEQ regional offices within ____ hours
24
Aerobic Bacteria require_____ in the water for their metabolism
oxygen
Anaerobic Bacteria _____ live with O2 present in the water for their metabolism
cannot
Faculta ve Bacteria require__________in the water for their metabolism
either aerobic or anaerobic condi ons
Updated RATED A+ | 2026
The name of the State Agency responsible for enforcing pollu on control laws in Texas
Texas Commission of Environmental Quality
The term pathogenic means
Capable of causing disease
The minimum separa on between sewer lines and potable water lines is
9 feet
A licensed wastewater operator is a professional
consistently does best job possible, prac ces personal safety, strives to improve job knowledge,
strives to keep the plant and collec on system in the best appearance and working order
An important step in tes ng a sample for Total Suspended Solids is
Filtering a sample
The Biochemical oxygen Demand (BOD) of a sample is based on
Measuring the dissolved oxygen (DO) used
The results of Biochemical Oxygen Demand (BOD) sample taken at a treatment plant tells the
operator
How the plant was opera ng 5 days ago
Which of the following are dangerous gasses that are likely to be present in li- sta ons and
manholes?
Natural gas, gasoline fumes, hydrogen sulfide and carbon dioxide
A preferred hydraulic method of cleaning sewer lines is
Hydro Jet Cleaner
Ways to reduce bad odors coming from a collec on system
rou nely cleaning slow running or low flow lines, adding chlorine or hydrogen peroxide to the
collec on system
,Types of pipe that are commonly used in wastewater collec on system
duc le iron, Poly Vinyl Chloride (PVC)
Before entering a confined space a worker should
Use approved monitoring device and check for the presence of dangerous gasses, ven late the
space with a blower, wear a safety harness and a6ach a life line
A properly designed and operated primary sedimenta on tank should remove _____ percent of
incoming BOD
30-40%
Devices that may be used to determine the level of sewage in a li- sta on
air bubbler, floats, electrodes, Acous c (sonic)
What is the most important role of aerobic bacteria in the treatment of wastewater?
decompose organic ma6er
The hydraulic loading of a trickling filter may be determined by
flow rate and filter area
These can be used to dewater sludge
belt press, drying beds, solid bowl centrifuge, gravity thickener
Most important to providing adequate sewage treatment in a stabiliza on pond
sunlight, algae, bacteria and me
Offensive and objec onable odors which some mes occur in trickling filters usually indicate
sep c condi ons are present
Dissolved Oxygen (DO) in aera on tank of an ac vated sludge plant should be maintained at or
about
2 to 4 mg/L
Contributes to the infiltra on in a collec on 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 Rota ng Biological Contactor (RBC) is
fixed firm biological treatment process
Needs to be checked regularly to properly operate an ac vated sludge treatment plant
aera on equipment and mixed liquor solids
Point source discharges are
discharges that come from pipes or ditches that are monitored, controlled and inspected
Non-point discharges are
discharges that have intermi6ent, dispersed flows having li6le or no control
The Texas Water Code establishes the protec on of water quality and quan ty of the state by
seDng stream standards, issues permits for discharges, iden fies non-point source controls, and
establishes water reuse.
The wastewater plant operator is primarily responsible for
trea ng wastewater discharged into the community
Chapter ___ of the Texas Water Code is the state law controlling water pollu on and ___
authority to control discharges in Texas
Chapter 26 and Texas Commission of Environmental Quality
The Texas Commission on Environmental Quality can revoke an operator's license if the operator
causes permit viola on, falsifies records or neglects their duty
If accidental discharge, bypass, or spill (SSO) of wastewater occurs the responsible party MUST
no fy TCEQ regional offices within ____ hours
24
Aerobic Bacteria require_____ in the water for their metabolism
oxygen
Anaerobic Bacteria _____ live with O2 present in the water for their metabolism
cannot
Faculta ve Bacteria require__________in the water for their metabolism
either aerobic or anaerobic condi ons
