WASTEWATER CLASS B TEXAS 2026 EXAM UPDATED
QUESTIONS AND ANSWERS GRADED A+
✔✔Organic loading of a stabilization pond is about ____ pounds of BOD/acre/day with a
detention time of at least ___ days. - ✔✔35 BOD/ 30 Days
✔✔Anaerobic digesters are covered to keep out ____, and to trap useful methane
which can be used to keep the digester warm. - ✔✔free oxygen
✔✔Unstable anareobic sludge contains streaks of _________ or ________. -
✔✔gray/green
✔✔Aerobic digestion is an ____process whereby the aerobic bacteria consume
themselves - ✔✔Endogenous
✔✔Approved disposal methods for digested, dewatered, sludge's are landfill, ____ and
____. - ✔✔Incineration & Land Application
✔✔Landfill applied sludge must have a solids content of at least _________percent -
✔✔20
✔✔Calcium Hypochlorite (HTH) is a strong _______ and reacts violently with
_________. - ✔✔Oxidizer/Oil & Hydrocarbons
✔✔When added to water chlorine forms _____&_______acid - ✔✔Hydrochlorous and
Hydrochloric
✔✔When ammonia is present in wastewater and reacts with chlorine_________are
formed - ✔✔Chloramines
✔✔Effluent dosage of chlorine in the contact chamber must produce a total combined
residual of - ✔✔1.0 mg/L after 20 minutes
✔✔Besides disinfection, chlorine has other uses at the wastewater treatment plant such
as - ✔✔Reduces BOD, Odor, Algae growth, Helps with Grease
✔✔TCEQ allows the reuse of wastewater, some of these include - ✔✔Irrigation, aquifer
recharge, cooling towers and fire protection
✔✔All reclaimed water piping must be _______in color - ✔✔purple
, ✔✔Before entering a manhole the operator should test for ________and oxygen levels
and ________the manhole before entering. - ✔✔all hazardous gasses and ventilate
✔✔When a municipal wastewater effluent has a high nitrate level and low ammonia
level this most likely means - ✔✔the effluent has received a high degree of aerobic
treatment
✔✔Total solids in wastewater are the sum of - ✔✔Settleable and volatile solids
✔✔This treatment device is commonly used to separate and remove large solids from
raw wastewater - ✔✔A Mechanically raked bar screen
✔✔___________would have an adverse effect on the proper settling of solids in a
clarifier. - ✔✔A short circuiting flow pattern
✔✔This test would give the best information on how efficiently a trickling filter was
operating - ✔✔Percent BOD Removal
✔✔This trickling filter problem could be reduced by increasing the recirculation ratio -
✔✔Filter files
✔✔What gases are produced by the controlled anaerobic digestion of wastewater
sludge's - ✔✔Methane & Carbon Dioxide
✔✔These diseases are caused by pathogenic organisms that may be present in raw
wastewater - ✔✔Hepatitis, typhoid, paratyphoid,dysentery, cholera, gastroenteritis,
polio, hookworm and giardiasis
✔✔During heavy rain it is possible that manholes and lift stations may overflow,
discharge waste materials into roadways or ditches. This type of discharge (SSO) would
be - ✔✔considered an unavoidable discharge, a violation of the Texas Water Code, a
bypass that must be reported within 24 hours and considered a health hazard
✔✔An effective way for the collection system worker to prevent infection by waterborn
pathogenic organism is to - ✔✔Wear protective clothing and avoid direct contact with
waste water
✔✔_________will increase the chances that sewage will turn septic - ✔✔Stoppages in
the main line
✔✔Extensive use of garbage disposals (grinders) in a community would likely have the
following effect on the collection system - ✔✔Increase the amount of flow, solids, and
grease
QUESTIONS AND ANSWERS GRADED A+
✔✔Organic loading of a stabilization pond is about ____ pounds of BOD/acre/day with a
detention time of at least ___ days. - ✔✔35 BOD/ 30 Days
✔✔Anaerobic digesters are covered to keep out ____, and to trap useful methane
which can be used to keep the digester warm. - ✔✔free oxygen
✔✔Unstable anareobic sludge contains streaks of _________ or ________. -
✔✔gray/green
✔✔Aerobic digestion is an ____process whereby the aerobic bacteria consume
themselves - ✔✔Endogenous
✔✔Approved disposal methods for digested, dewatered, sludge's are landfill, ____ and
____. - ✔✔Incineration & Land Application
✔✔Landfill applied sludge must have a solids content of at least _________percent -
✔✔20
✔✔Calcium Hypochlorite (HTH) is a strong _______ and reacts violently with
_________. - ✔✔Oxidizer/Oil & Hydrocarbons
✔✔When added to water chlorine forms _____&_______acid - ✔✔Hydrochlorous and
Hydrochloric
✔✔When ammonia is present in wastewater and reacts with chlorine_________are
formed - ✔✔Chloramines
✔✔Effluent dosage of chlorine in the contact chamber must produce a total combined
residual of - ✔✔1.0 mg/L after 20 minutes
✔✔Besides disinfection, chlorine has other uses at the wastewater treatment plant such
as - ✔✔Reduces BOD, Odor, Algae growth, Helps with Grease
✔✔TCEQ allows the reuse of wastewater, some of these include - ✔✔Irrigation, aquifer
recharge, cooling towers and fire protection
✔✔All reclaimed water piping must be _______in color - ✔✔purple
, ✔✔Before entering a manhole the operator should test for ________and oxygen levels
and ________the manhole before entering. - ✔✔all hazardous gasses and ventilate
✔✔When a municipal wastewater effluent has a high nitrate level and low ammonia
level this most likely means - ✔✔the effluent has received a high degree of aerobic
treatment
✔✔Total solids in wastewater are the sum of - ✔✔Settleable and volatile solids
✔✔This treatment device is commonly used to separate and remove large solids from
raw wastewater - ✔✔A Mechanically raked bar screen
✔✔___________would have an adverse effect on the proper settling of solids in a
clarifier. - ✔✔A short circuiting flow pattern
✔✔This test would give the best information on how efficiently a trickling filter was
operating - ✔✔Percent BOD Removal
✔✔This trickling filter problem could be reduced by increasing the recirculation ratio -
✔✔Filter files
✔✔What gases are produced by the controlled anaerobic digestion of wastewater
sludge's - ✔✔Methane & Carbon Dioxide
✔✔These diseases are caused by pathogenic organisms that may be present in raw
wastewater - ✔✔Hepatitis, typhoid, paratyphoid,dysentery, cholera, gastroenteritis,
polio, hookworm and giardiasis
✔✔During heavy rain it is possible that manholes and lift stations may overflow,
discharge waste materials into roadways or ditches. This type of discharge (SSO) would
be - ✔✔considered an unavoidable discharge, a violation of the Texas Water Code, a
bypass that must be reported within 24 hours and considered a health hazard
✔✔An effective way for the collection system worker to prevent infection by waterborn
pathogenic organism is to - ✔✔Wear protective clothing and avoid direct contact with
waste water
✔✔_________will increase the chances that sewage will turn septic - ✔✔Stoppages in
the main line
✔✔Extensive use of garbage disposals (grinders) in a community would likely have the
following effect on the collection system - ✔✔Increase the amount of flow, solids, and
grease
