Page |1
Wastewater Class B Texas |New
Actual Exam With 100% Verified
Questions And Correct Answers|
Excellent Scores
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
, Page |2
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
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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
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
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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
Wastewater Class B Texas |New
Actual Exam With 100% Verified
Questions And Correct Answers|
Excellent Scores
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
, Page |2
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
, Page |3
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
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
, Page |4
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
