TCEQ WASTEWATER CLASS B TEXAS EXAM
Questions and Answers
1. The name of the State Agency responsible for enforcing pollution
control laws in Texas: Texas Commission of Environmental Quality
2. The term pathogenic means: Capable of causing disease
3. The minimum separation between sewer lines and potable water
lines is: 9 feet
4. A licensed wastewater operator is a professional: 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
5. An important step in testing a sample for Total Suspended Solids is:
Filtering a sample
6. The Biochemical oxygen Demand (BOD) of a sample is based on:
Measuring the dissolved oxygen (DO) used
7. The results of Biochemical Oxygen Demand (BOD) sample taken
at a treat-ment plant tells the operator: How the plant was operating 5 days
,ago
8. Which of the following are dangerous gasses that are likely to be
present in lift stations and manholes?: Natural gas, gasoline fumes, hydrogen sulfide
and carbon dioxide
9. A preferred hydraulic method of cleaning sewer lines is: Hydro Jet
Cleaner
10. Ways to reduce bad odors coming from a collection system:
routinely cleaning slow running or low flow lines, adding chlorine or hydrogen peroxide to the
collection system
11. Types of pipe that are commonly used in wastewater collection
system: ductile iron, Poly Vinyl Chloride (PVC)
12. Before entering a confined space a worker should: 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
13. A properly designed and operated primary
sedimentation tank should re-move percent of incoming BOD: 30-
40%
14. Devices that may be used to determine the level of sewage in a
, lift station: air bubbler, floats, electrodes, Acoustic (sonic)
15. What is the most important role of aerobic bacteria in the
treatment of wastewater?: decompose organic matter
16. The hydraulic loading of a trickling filter may be determined by:
flow rate and filter area
17. These can be used to dewater sludge: belt press, drying beds, solid bowl
centrifuge, gravity thickener
18. Most important to providing adequate sewage treatment in
a stabilization pond: sunlight, algae, bacteria and time
19. Offensive and objectionable odors which sometimes occur in
trickling filters usually indicate: septic conditions are present
20. Dissolved Oxygen (DO) in aeration tank of an activated sludge
plant should be maintained at or about: 2 to 4 mg/L
21. Contributes to the infiltration in a collection system: breaks in the
main lines, high ground water levels, heavy rains, hydro jet cleaning plugged mains
22. When a centrifuge pump loses prime the: pump is no longer moving
Questions and Answers
1. The name of the State Agency responsible for enforcing pollution
control laws in Texas: Texas Commission of Environmental Quality
2. The term pathogenic means: Capable of causing disease
3. The minimum separation between sewer lines and potable water
lines is: 9 feet
4. A licensed wastewater operator is a professional: 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
5. An important step in testing a sample for Total Suspended Solids is:
Filtering a sample
6. The Biochemical oxygen Demand (BOD) of a sample is based on:
Measuring the dissolved oxygen (DO) used
7. The results of Biochemical Oxygen Demand (BOD) sample taken
at a treat-ment plant tells the operator: How the plant was operating 5 days
,ago
8. Which of the following are dangerous gasses that are likely to be
present in lift stations and manholes?: Natural gas, gasoline fumes, hydrogen sulfide
and carbon dioxide
9. A preferred hydraulic method of cleaning sewer lines is: Hydro Jet
Cleaner
10. Ways to reduce bad odors coming from a collection system:
routinely cleaning slow running or low flow lines, adding chlorine or hydrogen peroxide to the
collection system
11. Types of pipe that are commonly used in wastewater collection
system: ductile iron, Poly Vinyl Chloride (PVC)
12. Before entering a confined space a worker should: 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
13. A properly designed and operated primary
sedimentation tank should re-move percent of incoming BOD: 30-
40%
14. Devices that may be used to determine the level of sewage in a
, lift station: air bubbler, floats, electrodes, Acoustic (sonic)
15. What is the most important role of aerobic bacteria in the
treatment of wastewater?: decompose organic matter
16. The hydraulic loading of a trickling filter may be determined by:
flow rate and filter area
17. These can be used to dewater sludge: belt press, drying beds, solid bowl
centrifuge, gravity thickener
18. Most important to providing adequate sewage treatment in
a stabilization pond: sunlight, algae, bacteria and time
19. Offensive and objectionable odors which sometimes occur in
trickling filters usually indicate: septic conditions are present
20. Dissolved Oxygen (DO) in aeration tank of an activated sludge
plant should be maintained at or about: 2 to 4 mg/L
21. Contributes to the infiltration in a collection system: breaks in the
main lines, high ground water levels, heavy rains, hydro jet cleaning plugged mains
22. When a centrifuge pump loses prime the: pump is no longer moving
