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