Texas Wastewater B exam questions with correct answers
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Course
Texas Wastewater B
Institution
Texas Wastewater B
Texas Wastewater B exam questions with correct answers
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...
Texas Wastewater B exam questions with correct answers
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?
, Texas Wastewater B exam questions with correct answers
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?
Not to create a negative pressure in the anaerobic digester and to prevent coning of sludge
- -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 - -
Direct aquifer recharge of treated effluent can be used to?
under new construction, new plant, not running yet - -An exemption from filing
monthly effluent reports with the TCEQ may be obtained if?
Screens - -A wastewater treatment plant would make use of ? to remove small
concentrations of dissolved organics from wastewater effluent
5.4 acres - -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?
86.41 - -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?
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