1|Page
WASTEWATER CLASS B TEXAS WITH
QUESTIONS AND ANSWERS 100%
VERIFIED
The name of the State Agency responsible for enforcing pollution
control laws in Texas - correct answer_ Texas Commission of
Environmental Quality
The term pathogenic means - correct answer_ Capable of causing
disease
The minimum separation between sewer lines and potable water lines
is - correct answer_ 9 feet
A licensed wastewater operator is a professional - correct 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
,2|Page
An important step in testing a sample for Total Suspended Solids is -
correct answer_ Filtering a sample
The Biochemical oxygen Demand (BOD) of a sample is based on -
correct answer_ Measuring the dissolved oxygen (DO) used
The results of Biochemical Oxygen Demand (BOD) sample taken at a
treatment plant tells the operator - correct 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? - correct answer_ Natural gas,
gasoline fumes, hydrogen sulfide and carbon dioxide
A preferred hydraulic method of cleaning sewer lines is - correct
answer_ Hydro Jet Cleaner
Ways to reduce bad odors coming from a collection system - correct
answer_ routinely cleaning slow running or low flow lines, adding
chlorine or hydrogen peroxide to the collection system
,3|Page
Types of pipe that are commonly used in wastewater collection system
- correct answer_ ductile iron, Poly Vinyl Chloride (PVC)
Before entering a confined space a worker should - correct 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 - correct answer_ 30-40%
Devices that may be used to determine the level of sewage in a lift
station - correct answer_ air bubbler, floats, electrodes, Acoustic (sonic)
What is the most important role of aerobic bacteria in the treatment of
wastewater? - correct answer_ decompose organic matter
, 4|Page
The hydraulic loading of a trickling filter may be determined by - correct
answer_ flow rate and filter area
These can be used to dewater sludge - correct answer_ belt press,
drying beds, solid bowl centrifuge, gravity thickener
Most important to providing adequate sewage treatment in a
stabilization pond - correct answer_ sunlight, algae, bacteria and time
Offensive and objectionable odors which sometimes occur in trickling
filters usually indicate - correct answer_ septic conditions are present
Dissolved Oxygen (DO) in aeration tank of an activated sludge plant
should be maintained at or about - correct answer_ 2 to 4 mg/L
Contributes to the infiltration in a collection system - correct answer_
breaks in the main lines, high ground water levels, heavy rains, hydro
jet cleaning plugged mains
WASTEWATER CLASS B TEXAS WITH
QUESTIONS AND ANSWERS 100%
VERIFIED
The name of the State Agency responsible for enforcing pollution
control laws in Texas - correct answer_ Texas Commission of
Environmental Quality
The term pathogenic means - correct answer_ Capable of causing
disease
The minimum separation between sewer lines and potable water lines
is - correct answer_ 9 feet
A licensed wastewater operator is a professional - correct 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
,2|Page
An important step in testing a sample for Total Suspended Solids is -
correct answer_ Filtering a sample
The Biochemical oxygen Demand (BOD) of a sample is based on -
correct answer_ Measuring the dissolved oxygen (DO) used
The results of Biochemical Oxygen Demand (BOD) sample taken at a
treatment plant tells the operator - correct 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? - correct answer_ Natural gas,
gasoline fumes, hydrogen sulfide and carbon dioxide
A preferred hydraulic method of cleaning sewer lines is - correct
answer_ Hydro Jet Cleaner
Ways to reduce bad odors coming from a collection system - correct
answer_ routinely cleaning slow running or low flow lines, adding
chlorine or hydrogen peroxide to the collection system
,3|Page
Types of pipe that are commonly used in wastewater collection system
- correct answer_ ductile iron, Poly Vinyl Chloride (PVC)
Before entering a confined space a worker should - correct 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 - correct answer_ 30-40%
Devices that may be used to determine the level of sewage in a lift
station - correct answer_ air bubbler, floats, electrodes, Acoustic (sonic)
What is the most important role of aerobic bacteria in the treatment of
wastewater? - correct answer_ decompose organic matter
, 4|Page
The hydraulic loading of a trickling filter may be determined by - correct
answer_ flow rate and filter area
These can be used to dewater sludge - correct answer_ belt press,
drying beds, solid bowl centrifuge, gravity thickener
Most important to providing adequate sewage treatment in a
stabilization pond - correct answer_ sunlight, algae, bacteria and time
Offensive and objectionable odors which sometimes occur in trickling
filters usually indicate - correct answer_ septic conditions are present
Dissolved Oxygen (DO) in aeration tank of an activated sludge plant
should be maintained at or about - correct answer_ 2 to 4 mg/L
Contributes to the infiltration in a collection system - correct answer_
breaks in the main lines, high ground water levels, heavy rains, hydro
jet cleaning plugged mains
