Wastewater Class B Texas: 2025 /
2026 Review | 184 Comprehensive
Test Questions and Verified
Answers | 100% Correct | Grade A
(Newest Update)
Quiz_________________?
The name of the State Agency responsible for enforcing pollution control laws in
Texas -
Answer
Texas Commission of Environmental Quality
Quiz_________________?
The term pathogenic means -
Answer
Capable of causing disease
Quiz_________________?
The minimum separation between sewer lines and potable water lines is -
Answer
1
, 9 feet
Quiz_________________?
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
Quiz_________________?
An important step in testing a sample for Total Suspended Solids is -
Answer
Filtering a sample
Quiz_________________?
The Biochemical oxygen Demand (BOD) of a sample is based on -
Answer
Measuring the dissolved oxygen (DO) used
Quiz_________________?
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
Quiz_________________?
2
, 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
Quiz_________________?
A preferred hydraulic method of cleaning sewer lines is -
Answer
Hydro Jet Cleaner
Quiz_________________?
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
Quiz_________________?
Types of pipe that are commonly used in wastewater collection system -
Answer
ductile iron, Poly Vinyl Chloride (PVC)
Quiz_________________?
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
3
, Quiz_________________?
A properly designed and operated primary sedimentation tank should remove
_____ percent of incoming BOD -
Answer
30-40%
Quiz_________________?
Devices that may be used to determine the level of sewage in a lift station -
Answer
air bubbler, floats, electrodes, Acoustic (sonic)
Quiz_________________?
What is the most important role of aerobic bacteria in the treatment of
wastewater? -
Answer
decompose organic matter
Quiz_________________?
The hydraulic loading of a trickling filter may be determined by -
Answer
flow rate and filter area
Quiz_________________?
These can be used to dewater sludge -
4
2026 Review | 184 Comprehensive
Test Questions and Verified
Answers | 100% Correct | Grade A
(Newest Update)
Quiz_________________?
The name of the State Agency responsible for enforcing pollution control laws in
Texas -
Answer
Texas Commission of Environmental Quality
Quiz_________________?
The term pathogenic means -
Answer
Capable of causing disease
Quiz_________________?
The minimum separation between sewer lines and potable water lines is -
Answer
1
, 9 feet
Quiz_________________?
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
Quiz_________________?
An important step in testing a sample for Total Suspended Solids is -
Answer
Filtering a sample
Quiz_________________?
The Biochemical oxygen Demand (BOD) of a sample is based on -
Answer
Measuring the dissolved oxygen (DO) used
Quiz_________________?
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
Quiz_________________?
2
, 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
Quiz_________________?
A preferred hydraulic method of cleaning sewer lines is -
Answer
Hydro Jet Cleaner
Quiz_________________?
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
Quiz_________________?
Types of pipe that are commonly used in wastewater collection system -
Answer
ductile iron, Poly Vinyl Chloride (PVC)
Quiz_________________?
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
3
, Quiz_________________?
A properly designed and operated primary sedimentation tank should remove
_____ percent of incoming BOD -
Answer
30-40%
Quiz_________________?
Devices that may be used to determine the level of sewage in a lift station -
Answer
air bubbler, floats, electrodes, Acoustic (sonic)
Quiz_________________?
What is the most important role of aerobic bacteria in the treatment of
wastewater? -
Answer
decompose organic matter
Quiz_________________?
The hydraulic loading of a trickling filter may be determined by -
Answer
flow rate and filter area
Quiz_________________?
These can be used to dewater sludge -
4
