Wastewater Class B Texas Questions
and Answers | Latest Version |
2025/2026 | Correct & Verified
Why is ammonia monitoring important?
✔✔High ammonia indicates poor nitrification and can harm aquatic life.
What is the difference between infiltration and inflow?
✔✔Infiltration is groundwater entering sewers, inflow is stormwater entering through
connections.
Why are bar screens cleaned frequently?
✔✔To prevent clogging and maintain flow.
What is the purpose of a lagoon system?
✔✔To naturally treat wastewater using sunlight, algae, and bacteria.
Why must treatment plants keep daily operational logs?
✔✔To document performance, troubleshooting, and compliance.
1
,What is the role of the Texas Commission on Environmental Quality (TCEQ) in wastewater?
✔✔It regulates permits, standards, and operator certification.
What does MLSS stand for?
✔✔Mixed Liquor Suspended Solids.
Why is pH important in disinfection?
✔✔It affects chlorine effectiveness.
What does infiltration do to wastewater treatment capacity?
✔✔It reduces capacity by adding unnecessary flow.
Why are flow meters important?
✔✔They measure wastewater volume for monitoring and billing.
What is effluent reuse?
✔✔Using treated wastewater for irrigation, cooling, or recharge.
2
,What safety gear is required when handling chlorine?
✔✔Goggles, gloves, face shield, and respirator if needed.
What is the main purpose of primary treatment in a wastewater plant?
✔✔To remove settleable solids and floating materials.
Why is dissolved oxygen important in activated sludge systems?
✔✔It supports microbial respiration and breakdown of organic matter.
What is the typical pH range for effective biological treatment?
✔✔Between 6.5 and 8.5.
Why must sludge be stabilized before disposal?
✔✔To reduce pathogens and odors.
What is the function of a grit chamber?
✔✔To remove heavy inorganic materials like sand and gravel.
3
, What is the purpose of secondary clarifiers?
✔✔To separate biological solids from treated water.
Why is aeration needed in oxidation ditches?
✔✔To supply oxygen and keep solids in suspension.
What is the primary indicator of wastewater strength?
✔✔Biochemical Oxygen Demand (BOD).
What causes foaming in aeration basins?
✔✔Excess filamentous bacteria or detergents.
Why is chlorine used in wastewater treatment?
✔✔To disinfect and kill pathogenic organisms.
What does F/M ratio stand for?
✔✔Food to Microorganism ratio.
4
and Answers | Latest Version |
2025/2026 | Correct & Verified
Why is ammonia monitoring important?
✔✔High ammonia indicates poor nitrification and can harm aquatic life.
What is the difference between infiltration and inflow?
✔✔Infiltration is groundwater entering sewers, inflow is stormwater entering through
connections.
Why are bar screens cleaned frequently?
✔✔To prevent clogging and maintain flow.
What is the purpose of a lagoon system?
✔✔To naturally treat wastewater using sunlight, algae, and bacteria.
Why must treatment plants keep daily operational logs?
✔✔To document performance, troubleshooting, and compliance.
1
,What is the role of the Texas Commission on Environmental Quality (TCEQ) in wastewater?
✔✔It regulates permits, standards, and operator certification.
What does MLSS stand for?
✔✔Mixed Liquor Suspended Solids.
Why is pH important in disinfection?
✔✔It affects chlorine effectiveness.
What does infiltration do to wastewater treatment capacity?
✔✔It reduces capacity by adding unnecessary flow.
Why are flow meters important?
✔✔They measure wastewater volume for monitoring and billing.
What is effluent reuse?
✔✔Using treated wastewater for irrigation, cooling, or recharge.
2
,What safety gear is required when handling chlorine?
✔✔Goggles, gloves, face shield, and respirator if needed.
What is the main purpose of primary treatment in a wastewater plant?
✔✔To remove settleable solids and floating materials.
Why is dissolved oxygen important in activated sludge systems?
✔✔It supports microbial respiration and breakdown of organic matter.
What is the typical pH range for effective biological treatment?
✔✔Between 6.5 and 8.5.
Why must sludge be stabilized before disposal?
✔✔To reduce pathogens and odors.
What is the function of a grit chamber?
✔✔To remove heavy inorganic materials like sand and gravel.
3
, What is the purpose of secondary clarifiers?
✔✔To separate biological solids from treated water.
Why is aeration needed in oxidation ditches?
✔✔To supply oxygen and keep solids in suspension.
What is the primary indicator of wastewater strength?
✔✔Biochemical Oxygen Demand (BOD).
What causes foaming in aeration basins?
✔✔Excess filamentous bacteria or detergents.
Why is chlorine used in wastewater treatment?
✔✔To disinfect and kill pathogenic organisms.
What does F/M ratio stand for?
✔✔Food to Microorganism ratio.
4
