The name of the State Agency responsible for enforcing pollution control laws in Texas
Texas Commission of Environmental Quality
The term pathogenic means
Capable of causing disease
The minimum separation between sewer lines and potable water lines is
9 feet
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 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 operating 5 days ago
Which of the following are dangerous gasses that are likely to be present in lift stations 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 collection system
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
ductile 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, 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
30-40%
Devices that may be used to determine the level of sewage in a lift station
air bubbler, floats, electrodes, Acoustic (sonic)
What is the most important role of aerobic bacteria in the treatment of wastewater?
, decompose organic matter
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 stabilization pond
sunlight, algae, bacteria and time
Offensive and objectionable odors which sometimes occur in trickling filters usually indicate
septic conditions are present
Dissolved Oxygen (DO) in aeration tank of an activated sludge plant should be maintained at or
about
2 to 4 mg/L
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
Texas Commission of Environmental Quality
The term pathogenic means
Capable of causing disease
The minimum separation between sewer lines and potable water lines is
9 feet
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 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 operating 5 days ago
Which of the following are dangerous gasses that are likely to be present in lift stations 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 collection system
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
ductile 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, 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
30-40%
Devices that may be used to determine the level of sewage in a lift station
air bubbler, floats, electrodes, Acoustic (sonic)
What is the most important role of aerobic bacteria in the treatment of wastewater?
, decompose organic matter
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 stabilization pond
sunlight, algae, bacteria and time
Offensive and objectionable odors which sometimes occur in trickling filters usually indicate
septic conditions are present
Dissolved Oxygen (DO) in aeration tank of an activated sludge plant should be maintained at or
about
2 to 4 mg/L
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
