Texas Wastewater B Exam Verified 2024
19.5% - ANSWER-The definition of an oxygen-deficient atmosphere is one that contains
less than ______ percent oxygen?
430G - ANSWER-Under average flow conditions, it takes 18 minutes for a 10-foot
diameter lift station wet well to fill the 5 feet between the low water line and the level
where the lead pump comes on. After the pump comes on, it runs for 11 minutes before
turning off. These measurements indicate the average discharge rate of the pump is
about:
450ml - ANSWER-If released to atmospheric pressure, one part liquid chlorine will
expand to about?
5.4 acres - ANSWER-The maximum design organic loading for stabilization ponds is 35
pounds of BOD per acre per day. An industry wants to construct a facility with projected
flow of 50,000 gpd and an average BOD of 450 mg/l. A stabilization pond to serve this
projected loading would need to be a minimum size of?
8-12" - ANSWER-Anaerobically digested sludge should be applied to a drying bed to a
depth of about?
80% - ANSWER-Samples of water are taken from both the inlet and outlet ends of a
clarifier and poured into separate one-liter Imhoff cones. After settling for two hours, the
sample of inlet water shows a settleable solids concentration of 10 mg/l while the
sample of outlet water shows a settleable solids concentration of 2 mg/l. These
measurements indicate the efficiency of the clarifier for settleable solids removal is, 80%
86.41 - ANSWER-A sewer construction project in rocky ground will require a 2 foot wide
by 350 foot long trench with an average depth of 10 feet. The new pipe and select
bedding material (hauled in) will occupy the bottom third of the trench. Assuming that
the rest of the soil from the trench can be used for backfill, the cubic yards of spoil dirt
which must be hauled away will be about?
866 gpd - ANSWER-At a flow of 1.7 MGD, a 50-foot diameter circular clarifier has an
overflow rate of about?
90% or above - ANSWER-An efficient primary clarifier is expected to remove ? of the
influent settleable solids.
Adequate DO at surface at all times - ANSWER-Proper operation of a facultative pond
system requires that:,
Biological treatment for the removal of biodegradable organic wastes under aerobic
conditions. - ANSWER-The extended air activated sludge treatment process:?
19.5% - ANSWER-The definition of an oxygen-deficient atmosphere is one that contains
less than ______ percent oxygen?
430G - ANSWER-Under average flow conditions, it takes 18 minutes for a 10-foot
diameter lift station wet well to fill the 5 feet between the low water line and the level
where the lead pump comes on. After the pump comes on, it runs for 11 minutes before
turning off. These measurements indicate the average discharge rate of the pump is
about:
450ml - ANSWER-If released to atmospheric pressure, one part liquid chlorine will
expand to about?
5.4 acres - ANSWER-The maximum design organic loading for stabilization ponds is 35
pounds of BOD per acre per day. An industry wants to construct a facility with projected
flow of 50,000 gpd and an average BOD of 450 mg/l. A stabilization pond to serve this
projected loading would need to be a minimum size of?
8-12" - ANSWER-Anaerobically digested sludge should be applied to a drying bed to a
depth of about?
80% - ANSWER-Samples of water are taken from both the inlet and outlet ends of a
clarifier and poured into separate one-liter Imhoff cones. After settling for two hours, the
sample of inlet water shows a settleable solids concentration of 10 mg/l while the
sample of outlet water shows a settleable solids concentration of 2 mg/l. These
measurements indicate the efficiency of the clarifier for settleable solids removal is, 80%
86.41 - ANSWER-A sewer construction project in rocky ground will require a 2 foot wide
by 350 foot long trench with an average depth of 10 feet. The new pipe and select
bedding material (hauled in) will occupy the bottom third of the trench. Assuming that
the rest of the soil from the trench can be used for backfill, the cubic yards of spoil dirt
which must be hauled away will be about?
866 gpd - ANSWER-At a flow of 1.7 MGD, a 50-foot diameter circular clarifier has an
overflow rate of about?
90% or above - ANSWER-An efficient primary clarifier is expected to remove ? of the
influent settleable solids.
Adequate DO at surface at all times - ANSWER-Proper operation of a facultative pond
system requires that:,
Biological treatment for the removal of biodegradable organic wastes under aerobic
conditions. - ANSWER-The extended air activated sludge treatment process:?
