Texas Wastewater Class A Questions and Correct
Detailed Answers (Verified Answers) ||Already
Graded A+||Newest Version
Quiz: Seeding of BOD samples is necessary when samples
Ans: (All of the above) have a chlorine residual, have a previously been
chlorinated, have been subjected to high temperatures, contain high or low pH
industrial wastes
Quiz: When is blue-green algae the most dominant on a pond treatment
system?
Ans: Summer
Quiz: A 30-inch diameter wastewater interceptor is observed to be
flowing half-full at about two fps. The approximate volume of wastewater
flowing through the pipe is 3.14x1.25 x 1.25 x 2 = 4.9 cfs x 449 = 2,200 gpm
Ans: c. 2,200 gallons per minute
Quiz: 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
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, must the pump be operated to 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
Ans: 60 minutes
Quiz: If an existing centrifugal pump motor is replaced with a motor with
25 percent more speed, the motor horsepower required will increase by 1.25
x 1.25 x 1.25 = 1.95
Ans: 95 percent
Quiz: When must TCEQ be notified about expansions of a treatment
facility?
Ans: Before construction
Quiz: In an anaerobic digester, the percentage of methane and carbon
dioxide gas content should be
Ans: 70% methane, 30% carbon dioxide
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, Quiz: The temperature of an anaerobic digester should be maintained at a
minimum of
Ans: 95° F
Quiz: What type of wastewater treatment operates in the endogenous
bacteria growth phase?
Ans: Extended air
Quiz: Why is recirculation needed in a trickling filter?
Ans: Keep the media wet Further reduce BOD All of the above (a, b, and c)
Quiz: What type of fire extinguisher would be used on an electrical
control panel that has been de-energized?
Ans: Class A Class C (a and d)
Quiz: Disinfection with chlorine is the most effective at a pH of
Ans: 6.0
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, Quiz: The biomass on a normal functioning RBC has what appearance?
Ans: Grey to brown and 0.05 to 0.1 inch thick
Quiz: The sludge from a primary clarifier should percent solids?
Ans: 4% to 6%
Quiz: What is eutrophication in a pond system?
Ans: Enrichment with nitrogen and phosphorous Causes algae blooms (b and
c)
Quiz: How often should pH meters be calibrated?
Ans: Daily
Quiz: In Texas, pH meters are required to be calibrated on how many
buffers?
Ans: two
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Detailed Answers (Verified Answers) ||Already
Graded A+||Newest Version
Quiz: Seeding of BOD samples is necessary when samples
Ans: (All of the above) have a chlorine residual, have a previously been
chlorinated, have been subjected to high temperatures, contain high or low pH
industrial wastes
Quiz: When is blue-green algae the most dominant on a pond treatment
system?
Ans: Summer
Quiz: A 30-inch diameter wastewater interceptor is observed to be
flowing half-full at about two fps. The approximate volume of wastewater
flowing through the pipe is 3.14x1.25 x 1.25 x 2 = 4.9 cfs x 449 = 2,200 gpm
Ans: c. 2,200 gallons per minute
Quiz: 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
o
o
© 2025 TestTrackers
WhatsApp or call o Resources & Updates: [Testtrackers - Stuvia US]
o Your Success is Our Mission!
[+254707240657]
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me in the number given.
, must the pump be operated to 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
Ans: 60 minutes
Quiz: If an existing centrifugal pump motor is replaced with a motor with
25 percent more speed, the motor horsepower required will increase by 1.25
x 1.25 x 1.25 = 1.95
Ans: 95 percent
Quiz: When must TCEQ be notified about expansions of a treatment
facility?
Ans: Before construction
Quiz: In an anaerobic digester, the percentage of methane and carbon
dioxide gas content should be
Ans: 70% methane, 30% carbon dioxide
o
o
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WhatsApp or call o Resources & Updates: [Testtrackers - Stuvia US]
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[+254707240657]
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me in the number given.
, Quiz: The temperature of an anaerobic digester should be maintained at a
minimum of
Ans: 95° F
Quiz: What type of wastewater treatment operates in the endogenous
bacteria growth phase?
Ans: Extended air
Quiz: Why is recirculation needed in a trickling filter?
Ans: Keep the media wet Further reduce BOD All of the above (a, b, and c)
Quiz: What type of fire extinguisher would be used on an electrical
control panel that has been de-energized?
Ans: Class A Class C (a and d)
Quiz: Disinfection with chlorine is the most effective at a pH of
Ans: 6.0
o
o
© 2025 TestTrackers
WhatsApp or call o Resources & Updates: [Testtrackers - Stuvia US]
o Your Success is Our Mission!
[+254707240657]
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me in the number given.
, Quiz: The biomass on a normal functioning RBC has what appearance?
Ans: Grey to brown and 0.05 to 0.1 inch thick
Quiz: The sludge from a primary clarifier should percent solids?
Ans: 4% to 6%
Quiz: What is eutrophication in a pond system?
Ans: Enrichment with nitrogen and phosphorous Causes algae blooms (b and
c)
Quiz: How often should pH meters be calibrated?
Ans: Daily
Quiz: In Texas, pH meters are required to be calibrated on how many
buffers?
Ans: two
o
o
© 2025 TestTrackers
WhatsApp or call o Resources & Updates: [Testtrackers - Stuvia US]
o Your Success is Our Mission!
[+254707240657]
o For online exams and tutor expert, please whatsapp
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