Texas Wastewater Class A | Most Recent
Exam 2026 | Actual Comprehensive
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A wastewater stabilization pond has 130,680 sq. ft. It has a three to
one slope on the embankment and has an average depth of 5 ft.
Approximately how many people will this pond provide wastewater
treatment for? 130,680 sq ft = 3 acres x 35 lbs / BOD/ acre = 105 lbs
BOD =618 0.17 lbs BOD/ person 43,560 sq ft l acre
ANSWERS: d. 600
The TCEQ Design Criteria requires that deflection tests be performed
on all new installed flexible or semi-rigid pipe after the final backfill has
been in place for 30 days. This deflection test is usually performed using
a rigid ball or mandrel that has a diameter equal to -percent of the
inside diameter of the pipe.
ANSWERS: c. 95
,A one-cylinder reciprocating sludge pump with a 10-inch bore and a 5-inch
stroke pumps at rate of 50 cycles per minute. How many minutes must the
pump be operated to pump 5,000 gallons of sludge?
ANSWERS: 3.14 x0.416 x0.416 x0.416 x 50x7.48 = 84.5 gpm 5000 gal = 59.2min
84.5 gpm d. 60
minutes e.
When is blue-green algae the most dominant on a pond treatment system?
ANSWERS: Summer
What is the purpose of biomonitoring of a plant's effluent?
ANSWERS: d. Test for toxicity
Technology The management function of selecting and training employees
of an organization is called
ANSWERS: staffing
e. controlling When must TCEQ be notified about expansions of a
treatment facility?
ANSWERS: Before construction
In an anaerobic digester, the percentage of methane and carbon dioxide
gas content should be
ANSWERS: b. 70% methane, 30% carbon dioxide
,The temperature of an anaerobic digester should be maintained at a
minimum of
ANSWERS: 95° F
What type of wastewater treatment operates in the endogenous
bacteria growth phase?
ANSWERS: Extended air
Why is recirculation needed in a trickling filter?
ANSWERS: a. Keep the media wet b. Further reduce BOD c. Flood the
filter to control ponding and filter flies
What type of fire extinguisher would be used on an electrical control
panel that has been de-energized?
ANSWERS: f. a class a and d class c
Disinfection with chlorine is the most effective at a pH of
ANSWERS: 6.0
The biomass on a normal functioning RBC has what appearance?
ANSWERS: Grey to brown and 0.05 to 0.1 inch thick
, The sludge from a primary clarifier should contain what percent solids?
ANSWERS: b. 4% to 6%
What is eutrophication in a pond system?
ANSWERS: Enrichment with nitrogen and phosphorous Causes algae
blooms
A"Racetrack" is what type of Activate Sludge treatment?
ANSWERS: Extended air
Which form of activated sludge must have primary clarifiers?
ANSWERS: Conventional
What is the relationship between F/M ratio and MCRT?
ANSWERS: Indirect; if one goes up, the other goes down
Which activated sludge process does not achieve complete nitrification?
ANSWERS: Contact stabilization
Which form of activated sludge does the better job of handling shock or
toxic loads?
ANSWERS: Complete mix
Exam 2026 | Actual Comprehensive
Real Exam Questions With 100%
Correct Answers | Verified Answers |
Already Graded A+ | Guaranteed
Success!!
A wastewater stabilization pond has 130,680 sq. ft. It has a three to
one slope on the embankment and has an average depth of 5 ft.
Approximately how many people will this pond provide wastewater
treatment for? 130,680 sq ft = 3 acres x 35 lbs / BOD/ acre = 105 lbs
BOD =618 0.17 lbs BOD/ person 43,560 sq ft l acre
ANSWERS: d. 600
The TCEQ Design Criteria requires that deflection tests be performed
on all new installed flexible or semi-rigid pipe after the final backfill has
been in place for 30 days. This deflection test is usually performed using
a rigid ball or mandrel that has a diameter equal to -percent of the
inside diameter of the pipe.
ANSWERS: c. 95
,A one-cylinder reciprocating sludge pump with a 10-inch bore and a 5-inch
stroke pumps at rate of 50 cycles per minute. How many minutes must the
pump be operated to pump 5,000 gallons of sludge?
ANSWERS: 3.14 x0.416 x0.416 x0.416 x 50x7.48 = 84.5 gpm 5000 gal = 59.2min
84.5 gpm d. 60
minutes e.
When is blue-green algae the most dominant on a pond treatment system?
ANSWERS: Summer
What is the purpose of biomonitoring of a plant's effluent?
ANSWERS: d. Test for toxicity
Technology The management function of selecting and training employees
of an organization is called
ANSWERS: staffing
e. controlling When must TCEQ be notified about expansions of a
treatment facility?
ANSWERS: Before construction
In an anaerobic digester, the percentage of methane and carbon dioxide
gas content should be
ANSWERS: b. 70% methane, 30% carbon dioxide
,The temperature of an anaerobic digester should be maintained at a
minimum of
ANSWERS: 95° F
What type of wastewater treatment operates in the endogenous
bacteria growth phase?
ANSWERS: Extended air
Why is recirculation needed in a trickling filter?
ANSWERS: a. Keep the media wet b. Further reduce BOD c. Flood the
filter to control ponding and filter flies
What type of fire extinguisher would be used on an electrical control
panel that has been de-energized?
ANSWERS: f. a class a and d class c
Disinfection with chlorine is the most effective at a pH of
ANSWERS: 6.0
The biomass on a normal functioning RBC has what appearance?
ANSWERS: Grey to brown and 0.05 to 0.1 inch thick
, The sludge from a primary clarifier should contain what percent solids?
ANSWERS: b. 4% to 6%
What is eutrophication in a pond system?
ANSWERS: Enrichment with nitrogen and phosphorous Causes algae
blooms
A"Racetrack" is what type of Activate Sludge treatment?
ANSWERS: Extended air
Which form of activated sludge must have primary clarifiers?
ANSWERS: Conventional
What is the relationship between F/M ratio and MCRT?
ANSWERS: Indirect; if one goes up, the other goes down
Which activated sludge process does not achieve complete nitrification?
ANSWERS: Contact stabilization
Which form of activated sludge does the better job of handling shock or
toxic loads?
ANSWERS: Complete mix
