TCEQ Wastewater (Class A) License TEST
STUDY GUIDE 2026/2027 COMPLETE
QUESTIONS WITH CORRECT DETAILED
ANSWERS || 100% GUARANTEED PASS
<RECENT VERSION>
1. What is TCEQ doing to control "point source" pollution of the Texas
waterways? - ANSWER *Permitting of domestic wastewater plants
*Permitting of industrial wastewater plants
2. Describe proper design of force main wastewater lines. - ANSWER
Minimum two fps velocity with the smallest pump operating alone.
Minimum four inch diameter pipe with 150 psi rating.
3. What is Standard Dimension Ratio? - ANSWER Ratio of outside pipe
diameter (OD) to wall thickness (PVC)
4. Describe proper design of gravity wastewater lines. - ANSWER Designed to
flow half full ,under normal conditions, at a minimum of two fps and a
maximum of ten fps.
5. Manholes should have a minimum opening of? - ANSWER 24 inches and be
at least 4 feet wide.
6. pH meters should be calibrated how often? What standards should be used
for calibration purposes? - ANSWER Daily with at least two buffers.
,7. What is the standard chlorine residual and minimum contact time on Texas
wastewater permits? - ANSWER a. 1.0 mg/L for a minimum 20 minutes
detention time at peak flow b. No chlorine residual needed if detention time
is greater than 21 days
8. As the complexity of an organization increases, what management function
becomes most important? - ANSWER Planning
9. When fighting an electrical fire, you should________. - ANSWER *Use
non-conductive extinguishing methods
*Use Class A or B extinguishers if you are certain electricity to the unit has
been shut-off
10.If the float that turns on the lead pump in a wastewater lift station is situated
above a gravity influent line, the line will________. - ANSWER tend to
have a grease problem
11.If an operations company ceases its operation or is sold such that the control
of the company is transferred to another party, ________. - ANSWER the
company's operations certificate is revoked
12.The sludge from a primary clarifier should contain what percent solids? -
ANSWER 4% to 6%
13.What are the hazards of using powdered activated carbon? - ANSWER
*fire/explosive
*inhalation
*uncomfortable working conditions
,14.How often must a facility conduct TCLP on its sludge if its sludge disposal
is equal to or greater than 15,000 metric tons annually? - ANSWER monthly
15.Most gas protection instruments do not latch. That means that________. -
ANSWER the instrument stops alarming when removed from the
contaminated atmosphere
A. What are the three major characteristics of "point source" water
pollution in Texas? - ANSWER a. Can be easily identified. For
example, "This is where they discharge."
b. Can be monitored for effluent characteristics.
c. Can be permitted by regulators.
16.What is TCEQ doing to control "point source" pollution of the Texas
waterways? - ANSWER a. Permitting of domestic wastewater plants
b. Permitting of industrial wastewater plants
c. Permitting of storm water run-off.
d. Assessment of fines and penalties for violators.
17.Discuss the necessary elements for a safety program to be effective. -
ANSWER a. Written program
b. Supported from the top of the organization
c. Mandatory
d. Budget established for safety
e. Education and safety training
f. Accident investigation
g. Discipline for non-compliance
h. Program analysis and revision as necessary
i. Recordkeeping
18.What is a "racetrack"? Describe its use and lists its advantages. - ANSWER
An oxidation ditch is known as a racetrack in Texas. It is a form of the
, extended air activated sludge process. It usually utlizes an oval shaped ditch
(track) where the wastewater is propelled around the track by at least two
sets of rotors, paddles, or discs. Due to its long detention times, 18+ days,
separate sludge digestion is not usually needed. This process does a good job
of nitrifying (ammonia removal). It is a common form of wastewater
treatment in rural areas and small towns.
19.A typical two-pump lift station has four level control floats. Discuss how the
station operates and what each float does. - ANSWER The lowest or bottom
float turns off all pumps. The next float up turns on the lead pump. The third
float up turns on the lag pump. The fourth or top float is the high level alarm
that sounds the audible and light alarms
20.What are the benefits of aeration in wastewater treatment and discuss the
processes where it is used. - ANSWER a. Maintains fresh conditions in the
wastewater by maintaining adequate dissolved oxygen which is a mandatory
condition for secondary treatment.
b. Is used in primary treatment to concentrate grease on the surface of a
treatment unit where it can be skimmed off.
c. Is used to strip undesirable gases such as hydrogen sulfide. d. Aeration is
required if an aerobic digester is utilized to keep a minimum 1.0 mg/L DO.
e. Aeration may have to be used to keep proper DO levels in the effluent for
permit compliance.
f. If a flow equalization basin is utilized to store raw wastewater or storm
water, aeration will have to be utilized to keep the stored water from
becoming septic.
21.MSDS sheets must be kept for how many years after you have stopped using
the chemical? - ANSWER c. 30
22.A pneumatic ejector is - ANSWER a. a lift station pumping device
STUDY GUIDE 2026/2027 COMPLETE
QUESTIONS WITH CORRECT DETAILED
ANSWERS || 100% GUARANTEED PASS
<RECENT VERSION>
1. What is TCEQ doing to control "point source" pollution of the Texas
waterways? - ANSWER *Permitting of domestic wastewater plants
*Permitting of industrial wastewater plants
2. Describe proper design of force main wastewater lines. - ANSWER
Minimum two fps velocity with the smallest pump operating alone.
Minimum four inch diameter pipe with 150 psi rating.
3. What is Standard Dimension Ratio? - ANSWER Ratio of outside pipe
diameter (OD) to wall thickness (PVC)
4. Describe proper design of gravity wastewater lines. - ANSWER Designed to
flow half full ,under normal conditions, at a minimum of two fps and a
maximum of ten fps.
5. Manholes should have a minimum opening of? - ANSWER 24 inches and be
at least 4 feet wide.
6. pH meters should be calibrated how often? What standards should be used
for calibration purposes? - ANSWER Daily with at least two buffers.
,7. What is the standard chlorine residual and minimum contact time on Texas
wastewater permits? - ANSWER a. 1.0 mg/L for a minimum 20 minutes
detention time at peak flow b. No chlorine residual needed if detention time
is greater than 21 days
8. As the complexity of an organization increases, what management function
becomes most important? - ANSWER Planning
9. When fighting an electrical fire, you should________. - ANSWER *Use
non-conductive extinguishing methods
*Use Class A or B extinguishers if you are certain electricity to the unit has
been shut-off
10.If the float that turns on the lead pump in a wastewater lift station is situated
above a gravity influent line, the line will________. - ANSWER tend to
have a grease problem
11.If an operations company ceases its operation or is sold such that the control
of the company is transferred to another party, ________. - ANSWER the
company's operations certificate is revoked
12.The sludge from a primary clarifier should contain what percent solids? -
ANSWER 4% to 6%
13.What are the hazards of using powdered activated carbon? - ANSWER
*fire/explosive
*inhalation
*uncomfortable working conditions
,14.How often must a facility conduct TCLP on its sludge if its sludge disposal
is equal to or greater than 15,000 metric tons annually? - ANSWER monthly
15.Most gas protection instruments do not latch. That means that________. -
ANSWER the instrument stops alarming when removed from the
contaminated atmosphere
A. What are the three major characteristics of "point source" water
pollution in Texas? - ANSWER a. Can be easily identified. For
example, "This is where they discharge."
b. Can be monitored for effluent characteristics.
c. Can be permitted by regulators.
16.What is TCEQ doing to control "point source" pollution of the Texas
waterways? - ANSWER a. Permitting of domestic wastewater plants
b. Permitting of industrial wastewater plants
c. Permitting of storm water run-off.
d. Assessment of fines and penalties for violators.
17.Discuss the necessary elements for a safety program to be effective. -
ANSWER a. Written program
b. Supported from the top of the organization
c. Mandatory
d. Budget established for safety
e. Education and safety training
f. Accident investigation
g. Discipline for non-compliance
h. Program analysis and revision as necessary
i. Recordkeeping
18.What is a "racetrack"? Describe its use and lists its advantages. - ANSWER
An oxidation ditch is known as a racetrack in Texas. It is a form of the
, extended air activated sludge process. It usually utlizes an oval shaped ditch
(track) where the wastewater is propelled around the track by at least two
sets of rotors, paddles, or discs. Due to its long detention times, 18+ days,
separate sludge digestion is not usually needed. This process does a good job
of nitrifying (ammonia removal). It is a common form of wastewater
treatment in rural areas and small towns.
19.A typical two-pump lift station has four level control floats. Discuss how the
station operates and what each float does. - ANSWER The lowest or bottom
float turns off all pumps. The next float up turns on the lead pump. The third
float up turns on the lag pump. The fourth or top float is the high level alarm
that sounds the audible and light alarms
20.What are the benefits of aeration in wastewater treatment and discuss the
processes where it is used. - ANSWER a. Maintains fresh conditions in the
wastewater by maintaining adequate dissolved oxygen which is a mandatory
condition for secondary treatment.
b. Is used in primary treatment to concentrate grease on the surface of a
treatment unit where it can be skimmed off.
c. Is used to strip undesirable gases such as hydrogen sulfide. d. Aeration is
required if an aerobic digester is utilized to keep a minimum 1.0 mg/L DO.
e. Aeration may have to be used to keep proper DO levels in the effluent for
permit compliance.
f. If a flow equalization basin is utilized to store raw wastewater or storm
water, aeration will have to be utilized to keep the stored water from
becoming septic.
21.MSDS sheets must be kept for how many years after you have stopped using
the chemical? - ANSWER c. 30
22.A pneumatic ejector is - ANSWER a. a lift station pumping device
