TEXAS WASTEWATER A EXAM QUESTIONS &
DETAILED SOLUTIONS RATED 100% CORRECT
1. What is TCEQ doing to control "point
*Permitting of domestic
source" pollution of the Texas
wastewater plants
waterways?
*Permitting of industrial waste-
water plants
Minimum two fps velocity with
2. Describe proper design of force main
the smallest pump operating
waste- water lines.
alone.
Minimum four inch diameter
pipe with 150 psi rating.
3. What is Standard Dimension Ratio? Ratio of outside pipe diameter
(OD)
to wall thickness (PVC)
4. Describe proper design of gravity Designed to flow half full
wastewater lines. ,under normal conditions, at a
minimum of two fps and a
maximum of ten fps.
5. Manholes should have a minimum opening of? 24 inches and be at least
4 feet
wide.
6. pH meters should be calibrated how often? What Daily with at least
two butters.
standards should be used for calibration
purpos- es?
7. What is the standard chlorine residual and mini- a. 1.0 mg/L for a
minimum 20 min-
mum contact time on Texas wastewater permits? utes detention time at peak
flow b.
,TEXAS WASTEWATER A EXAM QUESTIONS &
DETAILED SOLUTIONS RATED 100% CORRECT
No chlorine residual needed if de-
tention time is greater than 21
days
8. As the complexity of an organization Planning
increases, what management function
becomes most im- portant?
, TEXAS WASTEWATER A EXAM QUESTIONS &
DETAILED SOLUTIONS RATED 100% CORRECT
9. What is the effective chlorine disinfecting agent? Hypochlorous Acid
(HOCl)
10. Does pH affect the chlorination process? Explain When using free
chlorine the dis-
your answer. The weir is 2
feet inside the
outer clarifier
wall. The flow
is
11. What is the effluent chlorine residual in 15.0 MGD. The
Texas that is standard on permits and weir and outflow
the minimum detention time? What is channel is 3 feet
the maximum residual allowed? deep.
a. What is the
12. A treatment plant has a clarifier that is 60
detention time
feet in diameter and is 10 feet deep. in hours?
The weir is 2 feet inside the outer
clarifier wall. The flow is
12.0 MGD. The weir and outflow channel
is 3 feet deep. a. What is the detention
time in hours?
13. What activated process cannot nitrify in a
single stage?
14. What is the GPM output of a piston
pump with an 8-inch diameter piston with
a 10-inch stroke operating at 50 strokes
per minute?
15. A treatment plant has a clarifier that is 60
feet in diameter and is 10 feet deep.
DETAILED SOLUTIONS RATED 100% CORRECT
1. What is TCEQ doing to control "point
*Permitting of domestic
source" pollution of the Texas
wastewater plants
waterways?
*Permitting of industrial waste-
water plants
Minimum two fps velocity with
2. Describe proper design of force main
the smallest pump operating
waste- water lines.
alone.
Minimum four inch diameter
pipe with 150 psi rating.
3. What is Standard Dimension Ratio? Ratio of outside pipe diameter
(OD)
to wall thickness (PVC)
4. Describe proper design of gravity Designed to flow half full
wastewater lines. ,under normal conditions, at a
minimum of two fps and a
maximum of ten fps.
5. Manholes should have a minimum opening of? 24 inches and be at least
4 feet
wide.
6. pH meters should be calibrated how often? What Daily with at least
two butters.
standards should be used for calibration
purpos- es?
7. What is the standard chlorine residual and mini- a. 1.0 mg/L for a
minimum 20 min-
mum contact time on Texas wastewater permits? utes detention time at peak
flow b.
,TEXAS WASTEWATER A EXAM QUESTIONS &
DETAILED SOLUTIONS RATED 100% CORRECT
No chlorine residual needed if de-
tention time is greater than 21
days
8. As the complexity of an organization Planning
increases, what management function
becomes most im- portant?
, TEXAS WASTEWATER A EXAM QUESTIONS &
DETAILED SOLUTIONS RATED 100% CORRECT
9. What is the effective chlorine disinfecting agent? Hypochlorous Acid
(HOCl)
10. Does pH affect the chlorination process? Explain When using free
chlorine the dis-
your answer. The weir is 2
feet inside the
outer clarifier
wall. The flow
is
11. What is the effluent chlorine residual in 15.0 MGD. The
Texas that is standard on permits and weir and outflow
the minimum detention time? What is channel is 3 feet
the maximum residual allowed? deep.
a. What is the
12. A treatment plant has a clarifier that is 60
detention time
feet in diameter and is 10 feet deep. in hours?
The weir is 2 feet inside the outer
clarifier wall. The flow is
12.0 MGD. The weir and outflow channel
is 3 feet deep. a. What is the detention
time in hours?
13. What activated process cannot nitrify in a
single stage?
14. What is the GPM output of a piston
pump with an 8-inch diameter piston with
a 10-inch stroke operating at 50 strokes
per minute?
15. A treatment plant has a clarifier that is 60
feet in diameter and is 10 feet deep.
