1|Page
TX CLASS C WASTEWATER
TREATMENT LICENSE| CERTIFIED
Q&A 2026
In the removal process, what must bacteria do? - correct-answer - gather food,
digest food, utilize food and give off by-products
What limiting factors affect bacteria growth? - correct-answer - pH, temperature,
moisture and food
What must the operator control in order for microorganisms to do their job? -
correct-answer - the environment
What by-products are excreted by microorganisms? - correct-answer - CO2, H2O
and NH3 and polysaccharides
,2|Page
Treatment pond classifications are... - correct-answer - wastewater stabilization
ponds, aerated lagoons, facultative lagoons, anaerobic lagoons and hyacinth
ponds
What will a wastewater stabilization pond effectively reduce? - correct-answer -
BOD and bacteria
Anaerobic lagoon dissolved oxygen content... - correct-answer - none
Facultative lagoon dissolved oxygen content... - correct-answer - DO on top and
none at bottom
,3|Page
Wastewater stabilization pond dissolved oxygen content... - correct-answer - DO
throughout (top, bottom and middle)
Depth of wastewater stabilization pond - correct-answer - 3-5 ft deep
Wastewater stabilization ponds are... - correct-answer - aerobic, dependent
upon sunlight and shallower than facultative lagoons
Benefit of multiple inlets and outlets in treatment ponds are... - correct-answer -
prevention of short-circuiting and will assure an evenly distributed flow
The organic loading on wastewater stabilization ponds should not exceed -
correct-answer - 35 lb. BOD/acre/day
, 4|Page
Depth of facultative lagoons is - correct-answer - 5-8 ft deep
Raw wastewater anaerobic ponds are usually used by... - correct-answer -
livestock feedlots, meat packing operations and industrial wastes generators
Essential needs of an efficient wastewater stabilization pond... - correct-answer -
DO, algae and bacteria
The ideal orientation of a wastewater stabilization pond would be... - correct-
answer - parallel with prevailing winds
What does short-circuiting in a pond cause? - correct-answer - reduction in
detention time
TX CLASS C WASTEWATER
TREATMENT LICENSE| CERTIFIED
Q&A 2026
In the removal process, what must bacteria do? - correct-answer - gather food,
digest food, utilize food and give off by-products
What limiting factors affect bacteria growth? - correct-answer - pH, temperature,
moisture and food
What must the operator control in order for microorganisms to do their job? -
correct-answer - the environment
What by-products are excreted by microorganisms? - correct-answer - CO2, H2O
and NH3 and polysaccharides
,2|Page
Treatment pond classifications are... - correct-answer - wastewater stabilization
ponds, aerated lagoons, facultative lagoons, anaerobic lagoons and hyacinth
ponds
What will a wastewater stabilization pond effectively reduce? - correct-answer -
BOD and bacteria
Anaerobic lagoon dissolved oxygen content... - correct-answer - none
Facultative lagoon dissolved oxygen content... - correct-answer - DO on top and
none at bottom
,3|Page
Wastewater stabilization pond dissolved oxygen content... - correct-answer - DO
throughout (top, bottom and middle)
Depth of wastewater stabilization pond - correct-answer - 3-5 ft deep
Wastewater stabilization ponds are... - correct-answer - aerobic, dependent
upon sunlight and shallower than facultative lagoons
Benefit of multiple inlets and outlets in treatment ponds are... - correct-answer -
prevention of short-circuiting and will assure an evenly distributed flow
The organic loading on wastewater stabilization ponds should not exceed -
correct-answer - 35 lb. BOD/acre/day
, 4|Page
Depth of facultative lagoons is - correct-answer - 5-8 ft deep
Raw wastewater anaerobic ponds are usually used by... - correct-answer -
livestock feedlots, meat packing operations and industrial wastes generators
Essential needs of an efficient wastewater stabilization pond... - correct-answer -
DO, algae and bacteria
The ideal orientation of a wastewater stabilization pond would be... - correct-
answer - parallel with prevailing winds
What does short-circuiting in a pond cause? - correct-answer - reduction in
detention time
