Exam (elaborations)
TX CLASS C WASTEWATER TREATMENT LICENSE QUESTIONS AND ANSWERS
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TX CLASS C WASTEWATER TREATMENT LICENSE QUESTIONS AND ANSWERS
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Name: Score:233 Multiple choice questions
Term 1 of 233
How much settleable solids is removed in primary settling?
90-95%
85-90%
85-95%
65-85%
Term 2 of 233
The TCEQ allows the reuse of treated wastewater for...
golf course irrigation; aquifer recharge; agricultural irrigation
flood control; river diversion; wetland restoration
landfill leachate management; hazardous waste disposal; stormwater runoff
industrial cooling; swimming pool filling; drinking water supply
Term 3 of 233
Chlorine contact chamber shall have at least a _____ minute detention time at peak flow
pH 7 - 80% HOCl
54
0.5 to 6.0
20
,Term 4 of 233
Benefit of multiple inlets and outlets in treatment ponds are...
elimination of all aquatic life and reduced nutrient uptake
enhanced sedimentation and decreased treatment efficiency
prevention of short-circuiting and will assure an evenly distributed flow
increased evaporation rates and reduced water quality
Term 5 of 233
What test best indicates the efficiency of a trickling filter?
influent dissolved oxygen (do) removal
volume/quality
percent BOD removal
physical properties
Term 6 of 233
One of the benefits of pre-aeration is
proteins
designed to flow half-full
gas and grease removal
gas, granular and solution
Term 7 of 233
Describe activated sludge...
is viscous and forms a gel-like substance with nearly 90% moisture content
is granular and easy to filter with around 75% moisture content
is fluffy and difficult to settle with approximately 99% moisture content
is dense and settles quickly with about 50% moisture content
,Term 8 of 233
Inflow
increase recirculation, practice good housekeeping and chlorinate the influent
aquifer recharge, evaporation in a pond, and application to farm land by irrigation
direct discharges of storm water or surface water into a wastewater collection system
(storm drains, roof gutters, yard drains, basement sump pumps and broken manholes
and wastewater lines).
the 1st stage of sewage treatment where large debris, such as sticks, grit, and rags pas
through a screen followed by a grit chamber, where the flow of water is slowed enough
to allow for sedimentation.
Term 9 of 233
At 20'C the HOCl (hypochlorous acid) concentration will vary with the pH as follows:
ph 7 - 79% Hocl
pH 7 - 80% HOCl
20-30%
ph 12 - 80% Hocl
Term 10 of 233
The materials found practical for phosphorus precipitation include the ionic forms of what?
cyanide, sulfides, organics and gasoline
aluminum, iron and calcium
water, nitrates and carbon dioxide
gas and grease removal
, Term 11 of 233
Who reviews plans and specifications for new construction projects before construction
begins?
TCEQ
GREENISH-YELLOW
INORGANIC
EPA
Term 12 of 233
The underdrain system of a standard rate trickling filter should be...
designed to flow half-full
quality
water tight
physical properties
Term 13 of 233
27 ft cubed =
1 acre-ft
1 yard cubed
2 yard cubed
65-75%
Term 14 of 233
The zoogleal mass on a filter is composed mainly of what?
bacteria and fungi
bacteria and viruses
protozoa and fungi
bacteria and algae
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