Revision Exam-Wastewater Class B
Texas Questions And Actual 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
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
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
Point source discharges are - Answer discharges that come from pipes or ditches that are monitored,
controlled and inspected
Non-point discharges are - Answer 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 - Answer
setting stream standards, issues permits for discharges, identifies non-point source controls, and
establishes water reuse.
The wastewater plant operator is primarily responsible for - Answer treating wastewater discharged
into the community
Chapter ___ of the Texas Water Code is the state law controlling water pollution and ___ authority to
control discharges in Texas - Answer Chapter 26 and Texas Commission of Environmental Quality
The Texas Commission on Environmental Quality can revoke an operator's license if the operator -
Answer causes permit violation, falsifies records or neglects their duty
If accidental discharge, bypass, or spill (SSO) of wastewater occurs the responsible party MUST notify
TCEQ regional offices within ____ hours - Answer 24
Aerobic Bacteria require_____ in the water for their metabolism - Answer oxygen
Anaerobic Bacteria _____ live with O2 present in the water for their metabolism - Answer cannot
Texas Questions And Actual 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
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
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
Point source discharges are - Answer discharges that come from pipes or ditches that are monitored,
controlled and inspected
Non-point discharges are - Answer 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 - Answer
setting stream standards, issues permits for discharges, identifies non-point source controls, and
establishes water reuse.
The wastewater plant operator is primarily responsible for - Answer treating wastewater discharged
into the community
Chapter ___ of the Texas Water Code is the state law controlling water pollution and ___ authority to
control discharges in Texas - Answer Chapter 26 and Texas Commission of Environmental Quality
The Texas Commission on Environmental Quality can revoke an operator's license if the operator -
Answer causes permit violation, falsifies records or neglects their duty
If accidental discharge, bypass, or spill (SSO) of wastewater occurs the responsible party MUST notify
TCEQ regional offices within ____ hours - Answer 24
Aerobic Bacteria require_____ in the water for their metabolism - Answer oxygen
Anaerobic Bacteria _____ live with O2 present in the water for their metabolism - Answer cannot
