Texas Wastewater B exam questions with correct
answers
Primary Clarifiers - (answers)In an activated sludge treatment system, primary
treatment processes include the:
Removal of Inorganic material from grit - (answers)In a washing grit remover,
the grit is moved slowly by screw conveyors up an inclined channel in order to?
90% or above - (answers)An efficient primary clarifier is expected to remove ?
of the influent settleable solids.
Adequate DO at surface at all times - (answers)Proper operation of a facultative
pond system requires that:,
True - (answers)The amount of organic matter removed by a trickling filter is
mostly dependent on the recirculation ratio
Bulking - (answers)In an activated sludge treatment plant, a Sludge Volume
Index (SVI) of 180 would indicate
Reseed The AB, Remove sludge from FC - (answers)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 - (answers)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 - (answers)When nitrification takes place in the activated sludge
process, facultative bacteria use
, Primary clarifiers - (answers)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 - (answers)One indication that an anaerobic digestion
facility is improving would be?
False - (answers)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 - (answers)Besides
disinfection, chlorination can be used in wastewater treatment processes to?
450ml - (answers)If released to atmospheric pressure, one part liquid chlorine
will expand to about?
8-12" - (answers)Anaerobically digested sludge should be applied to a drying
bed to a depth of about?
Not to create a negative pressure in the anaerobic digester and to prevent coning
of sludge - (answers)Sludge from a digester should be slowly drawn to a drying
bed in order to?
Recharge Water supply, keep saline out of groundwater stop ground Substance -
(answers)Direct aquifer recharge of treated effluent can be used to?
under new construction, new plant, not running yet - (answers)An exemption
from filing monthly effluent reports with the TCEQ may be obtained if?
answers
Primary Clarifiers - (answers)In an activated sludge treatment system, primary
treatment processes include the:
Removal of Inorganic material from grit - (answers)In a washing grit remover,
the grit is moved slowly by screw conveyors up an inclined channel in order to?
90% or above - (answers)An efficient primary clarifier is expected to remove ?
of the influent settleable solids.
Adequate DO at surface at all times - (answers)Proper operation of a facultative
pond system requires that:,
True - (answers)The amount of organic matter removed by a trickling filter is
mostly dependent on the recirculation ratio
Bulking - (answers)In an activated sludge treatment plant, a Sludge Volume
Index (SVI) of 180 would indicate
Reseed The AB, Remove sludge from FC - (answers)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 - (answers)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 - (answers)When nitrification takes place in the activated sludge
process, facultative bacteria use
, Primary clarifiers - (answers)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 - (answers)One indication that an anaerobic digestion
facility is improving would be?
False - (answers)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 - (answers)Besides
disinfection, chlorination can be used in wastewater treatment processes to?
450ml - (answers)If released to atmospheric pressure, one part liquid chlorine
will expand to about?
8-12" - (answers)Anaerobically digested sludge should be applied to a drying
bed to a depth of about?
Not to create a negative pressure in the anaerobic digester and to prevent coning
of sludge - (answers)Sludge from a digester should be slowly drawn to a drying
bed in order to?
Recharge Water supply, keep saline out of groundwater stop ground Substance -
(answers)Direct aquifer recharge of treated effluent can be used to?
under new construction, new plant, not running yet - (answers)An exemption
from filing monthly effluent reports with the TCEQ may be obtained if?
