WASTEWATER CLASS B
WASTEWATER CLASS B TEXAS EXAM QUESTIONS WITH CORRECT
ANSWERS.
The name of the State Agency responsible for enforcing pollution control laws in
Texas answer >>>> Texas Commission of Environmental Quality
The term pathogenic means answer >>>> Capable of causing disease
The minimum separation between sewer lines and potable water lines is answer
>>>> 9 feet
A licensed wastewater operator is a professional 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 answer >>>>
Filtering a sample
The Biochemical Oxygen Demand (BOD) of a sample is based on answer >>>>
Measuring the dissolved oxygen (DO) used
The results of Biochemical Oxygen Demand (BOD) sample taken at a treatment
plant tells the operator answer >>>> How the plant was operating 5 days ago
,WASTEWATER CLASS B
Which of the following are dangerous gasses that are likely to be present in lift
stations and manholes? answer >>>> Natural gas, gasoline fumes, hydrogen
sulfide and carbon dioxide
A preferred hydraulic method of cleaning sewer lines is answer >>>> Hydro Jet
Cleaner
Ways to reduce bad odors coming from a collection system 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 answer
>>>> ductile iron, Poly Vinyl Chloride (PVC)
Before entering a confined space, a worker should 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 answer >>>> 30-40%
Devices that may be used to determine the level of sewage in a lift station answer
>>>> air bubbler, floats, electrodes, Acoustic (sonic)
What is the most important role of aerobic bacteria in the treatment of
wastewater? answer >>>> decompose organic matter
, WASTEWATER CLASS B
The hydraulic loading of a trickling filter may be determined by answer >>>> flow
rate and filter area
These can be used to dewater sludge answer >>>> belt press, drying beds, solid
bowl centrifuge, gravity thickener
Most important to providing adequate sewage treatment in a stabilization pond
answer >>>> sunlight, algae, bacteria and time
Offensive and objectionable odors which sometimes occur in trickling filters
usually indicate answer >>>> septic conditions are present
Dissolved Oxygen (DO) in aeration tank of an activated sludge plant should be
maintained at or about answer >>>> 2 to 4 mg/L
Contributes to the infiltration in a collection system answer >>>> breaks in the
main lines, high ground water levels, heavy rains, hydro jet cleaning plugged
mains
When a centrifuge pump loses prime the answer >>>> pump is no longer moving
liquid
A Rotating Biological Contactor (RBC) is answer >>>> fixed firm biological
treatment process
Needs to be checked regularly to properly operate an activated sludge treatment
plant answer >>>> aeration equipment and mixed liquor solids
WASTEWATER CLASS B TEXAS EXAM QUESTIONS WITH CORRECT
ANSWERS.
The name of the State Agency responsible for enforcing pollution control laws in
Texas answer >>>> Texas Commission of Environmental Quality
The term pathogenic means answer >>>> Capable of causing disease
The minimum separation between sewer lines and potable water lines is answer
>>>> 9 feet
A licensed wastewater operator is a professional 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 answer >>>>
Filtering a sample
The Biochemical Oxygen Demand (BOD) of a sample is based on answer >>>>
Measuring the dissolved oxygen (DO) used
The results of Biochemical Oxygen Demand (BOD) sample taken at a treatment
plant tells the operator answer >>>> How the plant was operating 5 days ago
,WASTEWATER CLASS B
Which of the following are dangerous gasses that are likely to be present in lift
stations and manholes? answer >>>> Natural gas, gasoline fumes, hydrogen
sulfide and carbon dioxide
A preferred hydraulic method of cleaning sewer lines is answer >>>> Hydro Jet
Cleaner
Ways to reduce bad odors coming from a collection system 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 answer
>>>> ductile iron, Poly Vinyl Chloride (PVC)
Before entering a confined space, a worker should 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 answer >>>> 30-40%
Devices that may be used to determine the level of sewage in a lift station answer
>>>> air bubbler, floats, electrodes, Acoustic (sonic)
What is the most important role of aerobic bacteria in the treatment of
wastewater? answer >>>> decompose organic matter
, WASTEWATER CLASS B
The hydraulic loading of a trickling filter may be determined by answer >>>> flow
rate and filter area
These can be used to dewater sludge answer >>>> belt press, drying beds, solid
bowl centrifuge, gravity thickener
Most important to providing adequate sewage treatment in a stabilization pond
answer >>>> sunlight, algae, bacteria and time
Offensive and objectionable odors which sometimes occur in trickling filters
usually indicate answer >>>> septic conditions are present
Dissolved Oxygen (DO) in aeration tank of an activated sludge plant should be
maintained at or about answer >>>> 2 to 4 mg/L
Contributes to the infiltration in a collection system answer >>>> breaks in the
main lines, high ground water levels, heavy rains, hydro jet cleaning plugged
mains
When a centrifuge pump loses prime the answer >>>> pump is no longer moving
liquid
A Rotating Biological Contactor (RBC) is answer >>>> fixed firm biological
treatment process
Needs to be checked regularly to properly operate an activated sludge treatment
plant answer >>>> aeration equipment and mixed liquor solids
