Texas Wastewater Class A Exam Prep (Latest 2026/2027 Update) Questions and Verified Answers| 100% Correct

Texas Wastewater Class A Exam Prep (Latest 2026/2027 Update) Questions and Verified Answers| 100% Correct

Texas Wastewater Class A Exam Prep (Latest

2026/2027 Update) Questions and Verified

Answers| 100% Correct

Q: Before entering a confined space a worker should

Answer:

Use approved monitoring device and check for the presence of dangerous gasses, ventilate the

space with a blower, wear a safety harness and attach a life line

Q: A properly designed and operated primary sedimentation

tank should remove _____ percent of incoming BOD

Answer:

30-40%

Q: Devices that may be used to determine the level of sewage in a lift station

Answer:

air bubbler, floats, electrodes, Acoustic (sonic)

Q: What is the most important role of aerobic bacteria in the treatment of wastewater?

Answer:

decompose organic matter

Q: The hydraulic loading of a trickling filter may be determined by

Answer:

flow rate and filter area

Q: These can be used to dewater sludge

Answer:

belt press, drying beds, solid bowl centrifuge, gravity thickener

Q: Most important to providing adequate

sewage treatment in a stabilization pond

Answer:

sunlight, algae, bacteria and time

Q: Offensive and objectionable odors which

sometimes occur in trickling filters usually indicate

Answer:

septic conditions are present

Q: Dissolved Oxygen (DO) in aeration tank of an activated

sludge plant should be maintained at or about

Answer:

2 to 4 mg/L

Q: Contributes to the infiltration in a collection system

Answer:

breaks in the main lines, high ground water levels, heavy rains, hydro jet cleaning plugged mains

Q: When a centrifuge pump loses prime the

Answer:

pump is no longer moving liquid

Q: A Rotating Biological Contactor (RBC) is

Answer:

fixed firm biological treatment process

Q: Needs to be checked regularly to properly

operate an activated sludge treatment plant

Answer:

aeration equipment and mixed liquor solids

Q: Point source discharges are

Answer:

discharges that come from pipes or ditches that are monitored, controlled and inspected

Q: Non-point discharges are

Answer:

discharges that have intermittent, dispersed flows having little or no control

Q: The Texas Water Code establishes the protection

of water quality and quantity of the state by

Answer:

setting stream standards, issues permits for discharges, identifies non-point source controls, and

establishes water reuse.

Q: The wastewater plant operator is primarily responsible for

Answer:

treating wastewater discharged into the community

Q: Chapter ___ of the Texas Water Code is the state law controlling

water pollution and ___ authority to control discharges in Texas

Answer:

Chapter 26 and Texas Commission on Environmental Quality

Q: The Texas Commission on Environmental Quality

can revoke an operator's license if the operator

Answer:

causes permit violation, falsifies records or neglects their duty

Q: If accidental discharge, bypass, or spill (SSO) of wastewater

occurs the responsible party MUST notify TCEQ regional offices within ____ hours

Answer:

24

Q: Aerobic Bacteria require _____ in the water for their metabolism