TEXAS WASTEWATER B EXAM 2024/2025 WITH 100%
ACCURATE SOLUTIONS
In an activated sludge treatment system, primary treatment processes
include the: - Precise Answer ✔✔Primary Clarifiers
In a washing grit remover, the grit is moved slowly by screw conveyors
up an inclined channel in order to? - Precise Answer ✔✔Removal of
Inorganic material from grit
An efficient primary clarifier is expected to remove ? of the influent
settleable solids. - Precise Answer ✔✔90% or above
Proper operation of a facultative pond system requires that:, - Precise
Answer ✔✔Adequate DO at surface at all times
The amount of organic matter removed by a trickling filter is mostly
dependent on the recirculation ratio - Precise Answer ✔✔True
In an activated sludge treatment plant, a Sludge Volume Index (SVI) of
180 would indicate - Precise Answer ✔✔Bulking
The purpose of returning the solids from the bottom of the clarifier to the
aeration tank in the activated sludge process is to - Precise Answer
✔✔Reseed The AB, Remove sludge from FC
, Microscopic examination of a good-settling sludge should show a
predominance of: - Precise Answer ✔✔Free swimmer rotifers stalked
ciliates
When nitrification takes place in the activated sludge process, facultative
bacteria use - Precise Answer ✔✔Dissolved oxygen (DO) or oxygen
obtained from food materials such as sulfate or nitrate
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? - Precise Answer
✔✔Primary clarifiers
One indication that an anaerobic digestion facility is improving would
be? - Precise Answer ✔✔Low C02 high Methane
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? -
Precise Answer ✔✔False
Besides disinfection, chlorination can be used in wastewater treatment
processes to? - Precise Answer ✔✔Control odor, Reduce BOD ,Control
foaming, Aid in sludge
ACCURATE SOLUTIONS
In an activated sludge treatment system, primary treatment processes
include the: - Precise Answer ✔✔Primary Clarifiers
In a washing grit remover, the grit is moved slowly by screw conveyors
up an inclined channel in order to? - Precise Answer ✔✔Removal of
Inorganic material from grit
An efficient primary clarifier is expected to remove ? of the influent
settleable solids. - Precise Answer ✔✔90% or above
Proper operation of a facultative pond system requires that:, - Precise
Answer ✔✔Adequate DO at surface at all times
The amount of organic matter removed by a trickling filter is mostly
dependent on the recirculation ratio - Precise Answer ✔✔True
In an activated sludge treatment plant, a Sludge Volume Index (SVI) of
180 would indicate - Precise Answer ✔✔Bulking
The purpose of returning the solids from the bottom of the clarifier to the
aeration tank in the activated sludge process is to - Precise Answer
✔✔Reseed The AB, Remove sludge from FC
, Microscopic examination of a good-settling sludge should show a
predominance of: - Precise Answer ✔✔Free swimmer rotifers stalked
ciliates
When nitrification takes place in the activated sludge process, facultative
bacteria use - Precise Answer ✔✔Dissolved oxygen (DO) or oxygen
obtained from food materials such as sulfate or nitrate
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? - Precise Answer
✔✔Primary clarifiers
One indication that an anaerobic digestion facility is improving would
be? - Precise Answer ✔✔Low C02 high Methane
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? -
Precise Answer ✔✔False
Besides disinfection, chlorination can be used in wastewater treatment
processes to? - Precise Answer ✔✔Control odor, Reduce BOD ,Control
foaming, Aid in sludge
