Texas Wastewater Class A EXAM ACTUAL EXAM/ MOSTLY
TESTED QUESTIONS AND CORRECT DETAILED ANSWERS| 100%
CORRECT SOLUTIONS/GRADE A+
(All of the above) have a chlorine
residual, have a previously been
Seeding of BOD samples is necessary when
chlorinated, have been subjected to
samples
high temperatures, contain high or low
pH industrial wastes
When is blue-green algae the most dominant
Summer
on a pond treatment system?
A 30-inch diameter wastewater interceptor is
observed to be flowing half-full at about two
fps. The approximate volume of wastewater c. 2,200 gallons per minute
flowing through the pipe is 3.14x1.25 x 1.25 x
2 = 4.9 cfs x 449 = 2,200 gpm
,A one-cylinder reciprocating sludge pump
with a 10-inch bore and a 5-inch stroke
pumps at a rate of 50 cycles per minute. How
many minutes must the pump be operated to 60 minutes
pump 5,000 gallons of sludge? 3.14x0.416 x
0.416 x0.416 x 50 x7.48 = 84.5 gpm 5000 gal
= 59,2min 84.5 gpm b. 29
If an existing centrifugal pump motor is
replaced with a motor with 25 percent more
95 percent
speed, the motor horsepower required will
increase by 1.25 x 1.25 x 1.25 = 1.95
When must TCEQ be notified about
Before construction
expansions of a treatment facility?
In an anaerobic digester, the percentage of
methane and carbon dioxide gas content 70% methane, 30% carbon dioxide
should be
The temperature of an anaerobic digester
95° F
should be maintained at a minimum of
What type of wastewater treatment operates
Extended air
in the endogenous bacteria growth phase?
, Why is recirculation needed in a trickling Keep the media wet Further reduce
filter? BOD All of the above (a, b, and c)
What type of fire extinguisher would be used
on an electrical control panel that has been Class A Class C (a and d)
de-energized?
Disinfection with chlorine is the most effective
6.0
at a pH of
The biomass on a normal functioning RBC
Grey to brown and 0.05 to 0.1 inch thick
has what appearance?
The sludge from a primary clarifier should
4% to 6%
percent solids?
Enrichment with nitrogen and
What is eutrophication in a pond system? phosphorous Causes algae blooms (b
and c)
How often should pH meters be calibrated? Daily
In Texas, pH meters are required to be
two
calibrated on how many buffers?
An industrial complex has a BOD discharge
2941
to the POTW of 500 pounds per day. The
TESTED QUESTIONS AND CORRECT DETAILED ANSWERS| 100%
CORRECT SOLUTIONS/GRADE A+
(All of the above) have a chlorine
residual, have a previously been
Seeding of BOD samples is necessary when
chlorinated, have been subjected to
samples
high temperatures, contain high or low
pH industrial wastes
When is blue-green algae the most dominant
Summer
on a pond treatment system?
A 30-inch diameter wastewater interceptor is
observed to be flowing half-full at about two
fps. The approximate volume of wastewater c. 2,200 gallons per minute
flowing through the pipe is 3.14x1.25 x 1.25 x
2 = 4.9 cfs x 449 = 2,200 gpm
,A one-cylinder reciprocating sludge pump
with a 10-inch bore and a 5-inch stroke
pumps at a rate of 50 cycles per minute. How
many minutes must the pump be operated to 60 minutes
pump 5,000 gallons of sludge? 3.14x0.416 x
0.416 x0.416 x 50 x7.48 = 84.5 gpm 5000 gal
= 59,2min 84.5 gpm b. 29
If an existing centrifugal pump motor is
replaced with a motor with 25 percent more
95 percent
speed, the motor horsepower required will
increase by 1.25 x 1.25 x 1.25 = 1.95
When must TCEQ be notified about
Before construction
expansions of a treatment facility?
In an anaerobic digester, the percentage of
methane and carbon dioxide gas content 70% methane, 30% carbon dioxide
should be
The temperature of an anaerobic digester
95° F
should be maintained at a minimum of
What type of wastewater treatment operates
Extended air
in the endogenous bacteria growth phase?
, Why is recirculation needed in a trickling Keep the media wet Further reduce
filter? BOD All of the above (a, b, and c)
What type of fire extinguisher would be used
on an electrical control panel that has been Class A Class C (a and d)
de-energized?
Disinfection with chlorine is the most effective
6.0
at a pH of
The biomass on a normal functioning RBC
Grey to brown and 0.05 to 0.1 inch thick
has what appearance?
The sludge from a primary clarifier should
4% to 6%
percent solids?
Enrichment with nitrogen and
What is eutrophication in a pond system? phosphorous Causes algae blooms (b
and c)
How often should pH meters be calibrated? Daily
In Texas, pH meters are required to be
two
calibrated on how many buffers?
An industrial complex has a BOD discharge
2941
to the POTW of 500 pounds per day. The
