TEXAS WASTEWATER A (TEST 2)
QUESTIONS AND ANSWERS 100%
CORRECT
What is TCEQ doing to control, "point source" pollution in the Texas waterways? -
ANSWER-TCEQ approves permits for domestic wastewater plants
and Permitting of industrial wastewater plants.
Describe proper design of force main wastewater lines. - ANSWER-Minimum two feet
per second velocity, with the smallest pump operating alone. Minimum four inch
diameter pipe, with 150 psi rating.
What is Standard Dimension Ratio? - ANSWER-Ratio of outside pipe diameter, (OD) to
wall thickness (PVC)
gravity wastewater lines are designed - ANSWER-to flow half full ,under normal
conditions, at a minimum of two feet per second, and a maximum of ten feet per
second.
What is the standard chlorine residual, and minimum contact time, on Texas wastewater
permits? - ANSWER-1 milligram per liter for a minimum 20 minutes detention time at
peak flow. However, no chlorine residual needed, if detention time is greater than 21
days.
As the complexity of an organization increases, what management function becomes
most important? - ANSWER-As the complexity of an organization increases, the
management function of management becomes most important.
What is the effective chlorine disinfecting agent in disinfection? - ANSWER-
Hypochlorous Acid (HOCl)
Hypochlorous Acid - ANSWER-it is much more effective at pH levels below 7 .above
ph.of....7 the acid begins to be neutralized.
What is the effluent chlorine residual in Texas that is standard on permits and the
minimum detention time? What is the maximum residual allowed? - ANSWER-The
Texas standard, is 1 milligrams per liter, for a minimum 20 minutes detention time, at
peak flow. Maximum residual allowed, is 4 milligrams per liter.
Anaerobic digester gas should contain? - ANSWER-65 to 75% methane, 25 to 35%
carbon dioxide, and 1 to 5% nitrogen.
, What are some of the causes of filaments in the aeration basin? - ANSWER-low DO,
low organic loading,
septic wastes,
nutrient deficiencies, and.
high sulfur content
Good sludge quality will have a predominance of what organisms in the MLSS? -
ANSWER-Good sludge quality, will have a predominance , of Ciliated protozoa.
When an RBC is operating correctly, how will the slime appear on the media? -
ANSWER-When an RBC is operating correctly, the slime will appear Grey to brown and
have .05 to .1 inches thick zoogloeal mass.
According to design criteria, what are the minimum allowable diameters for a manhole?
- ANSWER-24 inch opening and 48 inch inside diameter
What activated sludge process does not achieve complete nitrification? - ANSWER-
Contact Stabilization
An extended air activated sludge plant has a fast settling sludge and high amounts of
pin floc leaving the clarifier. One way to correct this problem is to - ANSWER-* reduce
the MCRT, by wasting more,
* increase the F M ratio, by wasting more
The primary causes of wastewater stoppages are - ANSWER-roots, and grease
The inside diameter of a manhole, must be ? - ANSWER-48 inches in diameter
Digester gas should contain about - ANSWER-65% - 75% methane
On a construction job site, equipment booms must maintain at least - ANSWER-10 feet
feet of clearance, from overhead electric lines
Distilled water used for the BOD analysis , should not exceed - ANSWER-.2 , milligrams
per liter, depletion
In order to promote a collaborative management style, one thing a supervisor can do, is
- ANSWER-join the team, as a member rather than as boss
In the selection of forced main wastewater piping, what is the minimum working
pressure? - ANSWER-150 psi
The oxygen depletion of BOD dilution water should not exceed - ANSWER-.2 mg/L.
What is the minimum air gap when making water and wastewater connections? -
ANSWER-Minimum of one inch or twice the inlet pipe size whichever is greater.
QUESTIONS AND ANSWERS 100%
CORRECT
What is TCEQ doing to control, "point source" pollution in the Texas waterways? -
ANSWER-TCEQ approves permits for domestic wastewater plants
and Permitting of industrial wastewater plants.
Describe proper design of force main wastewater lines. - ANSWER-Minimum two feet
per second velocity, with the smallest pump operating alone. Minimum four inch
diameter pipe, with 150 psi rating.
What is Standard Dimension Ratio? - ANSWER-Ratio of outside pipe diameter, (OD) to
wall thickness (PVC)
gravity wastewater lines are designed - ANSWER-to flow half full ,under normal
conditions, at a minimum of two feet per second, and a maximum of ten feet per
second.
What is the standard chlorine residual, and minimum contact time, on Texas wastewater
permits? - ANSWER-1 milligram per liter for a minimum 20 minutes detention time at
peak flow. However, no chlorine residual needed, if detention time is greater than 21
days.
As the complexity of an organization increases, what management function becomes
most important? - ANSWER-As the complexity of an organization increases, the
management function of management becomes most important.
What is the effective chlorine disinfecting agent in disinfection? - ANSWER-
Hypochlorous Acid (HOCl)
Hypochlorous Acid - ANSWER-it is much more effective at pH levels below 7 .above
ph.of....7 the acid begins to be neutralized.
What is the effluent chlorine residual in Texas that is standard on permits and the
minimum detention time? What is the maximum residual allowed? - ANSWER-The
Texas standard, is 1 milligrams per liter, for a minimum 20 minutes detention time, at
peak flow. Maximum residual allowed, is 4 milligrams per liter.
Anaerobic digester gas should contain? - ANSWER-65 to 75% methane, 25 to 35%
carbon dioxide, and 1 to 5% nitrogen.
, What are some of the causes of filaments in the aeration basin? - ANSWER-low DO,
low organic loading,
septic wastes,
nutrient deficiencies, and.
high sulfur content
Good sludge quality will have a predominance of what organisms in the MLSS? -
ANSWER-Good sludge quality, will have a predominance , of Ciliated protozoa.
When an RBC is operating correctly, how will the slime appear on the media? -
ANSWER-When an RBC is operating correctly, the slime will appear Grey to brown and
have .05 to .1 inches thick zoogloeal mass.
According to design criteria, what are the minimum allowable diameters for a manhole?
- ANSWER-24 inch opening and 48 inch inside diameter
What activated sludge process does not achieve complete nitrification? - ANSWER-
Contact Stabilization
An extended air activated sludge plant has a fast settling sludge and high amounts of
pin floc leaving the clarifier. One way to correct this problem is to - ANSWER-* reduce
the MCRT, by wasting more,
* increase the F M ratio, by wasting more
The primary causes of wastewater stoppages are - ANSWER-roots, and grease
The inside diameter of a manhole, must be ? - ANSWER-48 inches in diameter
Digester gas should contain about - ANSWER-65% - 75% methane
On a construction job site, equipment booms must maintain at least - ANSWER-10 feet
feet of clearance, from overhead electric lines
Distilled water used for the BOD analysis , should not exceed - ANSWER-.2 , milligrams
per liter, depletion
In order to promote a collaborative management style, one thing a supervisor can do, is
- ANSWER-join the team, as a member rather than as boss
In the selection of forced main wastewater piping, what is the minimum working
pressure? - ANSWER-150 psi
The oxygen depletion of BOD dilution water should not exceed - ANSWER-.2 mg/L.
What is the minimum air gap when making water and wastewater connections? -
ANSWER-Minimum of one inch or twice the inlet pipe size whichever is greater.
