TEXAS WASTEWATER CLASS A FINAL PAPER
2026 TESTED QUESTIONS WITH FULL
SOLUTION GRADED A+
◉ When is blue-green algae the most dominant on a pond treatment
system? Answer: Summer
◉ 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 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 Answer: 60 minutes
◉ 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 Answer: 95 percent
◉ When must TCEQ be notified about expansions of a treatment
facility? Answer: Before construction
◉ In an anaerobic digester, the percentage of methane and carbon
dioxide gas content should be Answer: 70% methane, 30% carbon
dioxide
,◉ The temperature of an anaerobic digester should be maintained at
a minimum of Answer: 95° F
◉ What type of wastewater treatment operates in the endogenous
bacteria growth phase? Answer: Extended air
◉ Why is recirculation needed in a trickling filter? Answer: Keep the
media wet Further reduce BOD
◉ What type of fire extinguisher would be used on an electrical
control panel that has been de-energized? Answer: Class A Class C (a
and d)
◉ Disinfection with chlorine is the most effective at a pH of Answer:
6
◉ The biomass on a normal functioning RBC has what appearance?
Answer: Grey to brown and 0.05 to 0.1 inch thick
◉ The sludge from a primary clarifier should percent solids?
Answer: 4% to 6%
◉ What is eutrophication in a pond system? Answer: Enrichment
with nitrogen and phosphorous Causes algae blooms (b and c)
, ◉ How often should pH meters be calibrated? Answer: Daily
◉ In Texas, pH meters are required to be calibrated on how many
buffers? Answer: two
◉ The parameters of the BOD test are Answer: 5 days at 20°
Centigrade
◉ Standard Dimension Ratio in pvc pipe is defined as Answer: Ratio
of OD pipe diameter to wall thickness
◉ How should shoring be removed from a trench? Answer: up from
the bottom up
◉ In low pressure sewer systems where each tap must have a
grinder pump lift station, station is considered to be Answer: part of
the collection system and the responsibility of the utility
◉ Effective communication depends on Answer: being a good
listener
2026 TESTED QUESTIONS WITH FULL
SOLUTION GRADED A+
◉ When is blue-green algae the most dominant on a pond treatment
system? Answer: Summer
◉ 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 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 Answer: 60 minutes
◉ 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 Answer: 95 percent
◉ When must TCEQ be notified about expansions of a treatment
facility? Answer: Before construction
◉ In an anaerobic digester, the percentage of methane and carbon
dioxide gas content should be Answer: 70% methane, 30% carbon
dioxide
,◉ The temperature of an anaerobic digester should be maintained at
a minimum of Answer: 95° F
◉ What type of wastewater treatment operates in the endogenous
bacteria growth phase? Answer: Extended air
◉ Why is recirculation needed in a trickling filter? Answer: Keep the
media wet Further reduce BOD
◉ What type of fire extinguisher would be used on an electrical
control panel that has been de-energized? Answer: Class A Class C (a
and d)
◉ Disinfection with chlorine is the most effective at a pH of Answer:
6
◉ The biomass on a normal functioning RBC has what appearance?
Answer: Grey to brown and 0.05 to 0.1 inch thick
◉ The sludge from a primary clarifier should percent solids?
Answer: 4% to 6%
◉ What is eutrophication in a pond system? Answer: Enrichment
with nitrogen and phosphorous Causes algae blooms (b and c)
, ◉ How often should pH meters be calibrated? Answer: Daily
◉ In Texas, pH meters are required to be calibrated on how many
buffers? Answer: two
◉ The parameters of the BOD test are Answer: 5 days at 20°
Centigrade
◉ Standard Dimension Ratio in pvc pipe is defined as Answer: Ratio
of OD pipe diameter to wall thickness
◉ How should shoring be removed from a trench? Answer: up from
the bottom up
◉ In low pressure sewer systems where each tap must have a
grinder pump lift station, station is considered to be Answer: part of
the collection system and the responsibility of the utility
◉ Effective communication depends on Answer: being a good
listener
