TEXAS WASTEWATER B Exam Question and
Answer 2026 | Complete Certification
Review Guide | Grade A+
• Primary Clarifiers -✓✓In an activated sludge treatment system, primary
treatment processes include the:
• Removal of Inorganic material from grit -✓✓In a washing grit remover, the grit
is moved slowly by screw conveyors up an inclined channel in order to?
• 90% or above -✓✓An efficient primary clarifier is expected to remove ? of the
influent settleable solids.
• Adequate DO at surface at all times -✓✓Proper operation of a facultative pond
system requires that:,
• True -✓✓The amount of organic matter removed by a trickling filter is mostly
dependent on the recirculation ratio
• Bulking -✓✓In an activated sludge treatment plant, a Sludge Volume Index (SVI)
of 180 would indicate
• Reseed The AB, Remove sludge from FC -✓✓The purpose of returning the solids
from the bottom of the clarifier to the aeration tank in the activated sludge
process is to
, • Free swimmer rotifers stalked ciliates -✓✓Microscopic examination of a good-
settling sludge should show a predominance of:
• Dissolved oxygen (DO) or oxygen obtained from food materials such as sulfate
or nitrate -✓✓When nitrification takes place in the activated sludge process,
facultative bacteria use
• Primary clarifiers -✓✓In an activated sludge process, the results of a mixed
liquor settling test indicate that the supernatant of the mixed liquor sample is
clear, but the supernatant of the plant effluent sample is turbid. These test results
indicate that the problem is occurring in the?
• Low C02 high Methane -✓✓One indication that an anaerobic digestion facility is
improving would be?
• False -✓✓The terms "low rate" and "high rate" when used in reference to the
anaerobic digester refer to the rate of stabilization of the raw sludge?
• Control odor, Reduce BOD ,Control foaming, Aid in sludge -✓✓Besides
disinfection, chlorination can be used in wastewater treatment processes to?
• 450ml -✓✓If released to atmospheric pressure, one part liquid chlorine will
expand to about?
• 8-12" -✓✓Anaerobically digested sludge should be applied to a drying bed to a
depth of about?
Answer 2026 | Complete Certification
Review Guide | Grade A+
• Primary Clarifiers -✓✓In an activated sludge treatment system, primary
treatment processes include the:
• Removal of Inorganic material from grit -✓✓In a washing grit remover, the grit
is moved slowly by screw conveyors up an inclined channel in order to?
• 90% or above -✓✓An efficient primary clarifier is expected to remove ? of the
influent settleable solids.
• Adequate DO at surface at all times -✓✓Proper operation of a facultative pond
system requires that:,
• True -✓✓The amount of organic matter removed by a trickling filter is mostly
dependent on the recirculation ratio
• Bulking -✓✓In an activated sludge treatment plant, a Sludge Volume Index (SVI)
of 180 would indicate
• Reseed The AB, Remove sludge from FC -✓✓The purpose of returning the solids
from the bottom of the clarifier to the aeration tank in the activated sludge
process is to
, • Free swimmer rotifers stalked ciliates -✓✓Microscopic examination of a good-
settling sludge should show a predominance of:
• Dissolved oxygen (DO) or oxygen obtained from food materials such as sulfate
or nitrate -✓✓When nitrification takes place in the activated sludge process,
facultative bacteria use
• Primary clarifiers -✓✓In an activated sludge process, the results of a mixed
liquor settling test indicate that the supernatant of the mixed liquor sample is
clear, but the supernatant of the plant effluent sample is turbid. These test results
indicate that the problem is occurring in the?
• Low C02 high Methane -✓✓One indication that an anaerobic digestion facility is
improving would be?
• False -✓✓The terms "low rate" and "high rate" when used in reference to the
anaerobic digester refer to the rate of stabilization of the raw sludge?
• Control odor, Reduce BOD ,Control foaming, Aid in sludge -✓✓Besides
disinfection, chlorination can be used in wastewater treatment processes to?
• 450ml -✓✓If released to atmospheric pressure, one part liquid chlorine will
expand to about?
• 8-12" -✓✓Anaerobically digested sludge should be applied to a drying bed to a
depth of about?
