TEXAS WASTEWATER CLASS A (TEST
3) WITH CORRECT SOLUTIONS
What removes Total Suspended Solids from a sample (TSS) - ANSWER-filtration
What chapter of the Texas Water Code gives T C E Q authority to control discharges in
Texas. - ANSWER-Chapter 26
Inorganic solids include - ANSWER-sand, grit and minerals
Organic solids include - ANSWER-organic materials from plants, animals or humans
A good plant influent pH is about - ANSWER-7.2
A simple method for indicating when to waste sludge is - ANSWER-30 minute settling
test
What is the expected organic loading of a stabilization pond and what is the detention
time in days? - ANSWER-35 pounds, of B O D, per acre, per day, and a detention time
of 30 Days
Calcium Hypochlorite or HTH, is a - ANSWER-strong Oxidizer and reacts violently with
oil and hydro carbons.
When added to water what does chlorine form - ANSWER-it forms Hypochlorite, and
Hydrochloric acid
When ammonia is present in wastewater and
reacts with chlorine what is formed - ANSWER-When ammonia is present in
wastewater, and
reacts with chlorine, Chloramines are formed.
Besides disinfection, chlorine has other uses
at the wastewater treatment plant such as - ANSWER-Reduces BOD, Odor, Algae
growth, Helps with Grease
TCEQ allows the reuse of wastewater, some of these include - ANSWER-Irrigation,
aquifer recharge, cooling towers and fire protection
All reclaimed water piping must be the color - ANSWER-purple
When a municipal wastewater effluent has a high nitrate
, level, and low ammonia level, this most likely means - ANSWER-a high degree of
aerobic treatment
Total solids in wastewater are the sum of - ANSWER-Settleable and volatile solids
In an excavation, if a ladder is used as a means of exit, it must
extend how far above ground, and how far apart
laterally - ANSWER-3 feet / 25 feet laterally
the best to determine if a
storm drain is connected to a sanitary sewer line is a - ANSWER-Smoke Test
What is commonly used to seal
joint leaks, on a main with minimal interruption - ANSWER-internal grouting
Pre-treatment of wastewater would include: - ANSWER-Coarse or fine screening,
grinding and grit removal and
grease removal and pre-aeration
This treatment device is commonly used to separate,
and remove large solids from raw wastewater - ANSWER-A Mechanically raked bar
screen
This test would give the best information
on how efficiently a trickling filter was operating - ANSWER-Percent BOD Removal
This trickling filter problem could be
reduced by increasing the re-circulation ratio - ANSWER-Filter files
The minimum size for a gravity flow sewer line on
city right-of-way and the minimum grade is - ANSWER-6 inch and a grade of .50
percent
The most accurate way to find the average wastewater
flow rate in an existing 10-inch sewer main is - ANSWER-Obtaining actual flow data &
verifying with field data
What is the greatest advantage for using fiberglass
manholes in areas with high groundwater? - ANSWER-fiberglass is not subject to
infiltration
Excessive power consumption by a pump could be caused by - ANSWER-Worn
bearings and worn impeller
Primary treatment of wastewater would include - ANSWER-settling tanks or basins,
scum collection and removal,
3) WITH CORRECT SOLUTIONS
What removes Total Suspended Solids from a sample (TSS) - ANSWER-filtration
What chapter of the Texas Water Code gives T C E Q authority to control discharges in
Texas. - ANSWER-Chapter 26
Inorganic solids include - ANSWER-sand, grit and minerals
Organic solids include - ANSWER-organic materials from plants, animals or humans
A good plant influent pH is about - ANSWER-7.2
A simple method for indicating when to waste sludge is - ANSWER-30 minute settling
test
What is the expected organic loading of a stabilization pond and what is the detention
time in days? - ANSWER-35 pounds, of B O D, per acre, per day, and a detention time
of 30 Days
Calcium Hypochlorite or HTH, is a - ANSWER-strong Oxidizer and reacts violently with
oil and hydro carbons.
When added to water what does chlorine form - ANSWER-it forms Hypochlorite, and
Hydrochloric acid
When ammonia is present in wastewater and
reacts with chlorine what is formed - ANSWER-When ammonia is present in
wastewater, and
reacts with chlorine, Chloramines are formed.
Besides disinfection, chlorine has other uses
at the wastewater treatment plant such as - ANSWER-Reduces BOD, Odor, Algae
growth, Helps with Grease
TCEQ allows the reuse of wastewater, some of these include - ANSWER-Irrigation,
aquifer recharge, cooling towers and fire protection
All reclaimed water piping must be the color - ANSWER-purple
When a municipal wastewater effluent has a high nitrate
, level, and low ammonia level, this most likely means - ANSWER-a high degree of
aerobic treatment
Total solids in wastewater are the sum of - ANSWER-Settleable and volatile solids
In an excavation, if a ladder is used as a means of exit, it must
extend how far above ground, and how far apart
laterally - ANSWER-3 feet / 25 feet laterally
the best to determine if a
storm drain is connected to a sanitary sewer line is a - ANSWER-Smoke Test
What is commonly used to seal
joint leaks, on a main with minimal interruption - ANSWER-internal grouting
Pre-treatment of wastewater would include: - ANSWER-Coarse or fine screening,
grinding and grit removal and
grease removal and pre-aeration
This treatment device is commonly used to separate,
and remove large solids from raw wastewater - ANSWER-A Mechanically raked bar
screen
This test would give the best information
on how efficiently a trickling filter was operating - ANSWER-Percent BOD Removal
This trickling filter problem could be
reduced by increasing the re-circulation ratio - ANSWER-Filter files
The minimum size for a gravity flow sewer line on
city right-of-way and the minimum grade is - ANSWER-6 inch and a grade of .50
percent
The most accurate way to find the average wastewater
flow rate in an existing 10-inch sewer main is - ANSWER-Obtaining actual flow data &
verifying with field data
What is the greatest advantage for using fiberglass
manholes in areas with high groundwater? - ANSWER-fiberglass is not subject to
infiltration
Excessive power consumption by a pump could be caused by - ANSWER-Worn
bearings and worn impeller
Primary treatment of wastewater would include - ANSWER-settling tanks or basins,
scum collection and removal,
