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Wastewater Class B Texas questions and answers rated A+ 2024/2025
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Wastewater Class B TexasThe name of the State Agency responsible for enforcing pollution control laws in Texas -
ANSTexas Commission of Environmental Quality
The term pathogenic means - ANSCapable of causing disease
The minimum separation between sewer lines and potable water lines is - ANS9 feet
A licensed wastewater operator is a professional - ANSconsistently does best job possible,
practices personal safety, strives to improve job knowledge, strives to keep the plant and
collection system in the best appearance and working order
An important step in testing a sample for Total Suspended Solids is - ANSFiltering a sample
The Biochemical oxygen Demand (BOD) of a sample is based on - ANSMeasuring the
dissolved oxygen (DO) used
The results of Biochemical Oxygen Demand (BOD) sample taken at a treatment plant tells
the operator - ANSHow the plant was operating 5 days ago
Which of the following are dangerous gasses that are likely to be present in lift stations and
manholes? - ANSNatural gas, gasoline fumes, hydrogen sulfide and carbon dioxide
A preferred hydraulic method of cleaning sewer lines is - ANSHydro Jet Cleaner
Ways to reduce bad odors coming from a collection system - ANSroutinely cleaning slow
running or low flow lines, adding chlorine or hydrogen peroxide to the collection system
Types of pipe that are commonly used in wastewater collection system - ANSductile iron,
Poly Vinyl Chloride (PVC)
Before entering a confined space a worker should - ANSUse 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
A properly designed and operated primary sedimentation tank should remove _____ percent
of incoming BOD - ANS30-40%
Devices that may be used to determine the level of sewage in a lift station - ANSair bubbler,
floats, electrodes, Acoustic (sonic)
What is the most important role of aerobic bacteria in the treatment of wastewater? -
ANSdecompose organic matter
, The hydraulic loading of a trickling filter may be determined by - ANSflow rate and filter area
These can be used to dewater sludge - ANSbelt press, drying beds, solid bowl centrifuge,
gravity thickener
Most important to providing adequate sewage treatment in a stabilization pond -
ANSsunlight, algae, bacteria and time
Offensive and objectionable odors which sometimes occur in trickling filters usually indicate -
ANSseptic conditions are present
Dissolved Oxygen (DO) in aeration tank of an activated sludge plant should be maintained at
or about - ANS2 to 4 mg/L
Contributes to the infiltration in a collection system - ANSbreaks in the main lines, high
ground water levels, heavy rains, hydro jet cleaning plugged mains
When a centrifuge pump loses prime the - ANSpump is no longer moving liquid
A Rotating Biological Contactor (RBC) is - ANSfixed firm biological treatment process
Needs to be checked regularly to properly operate an activated sludge treatment plant -
ANSaeration equipment and mixed liquor solids
Point source discharges are - ANSdischarges that come from pipes or ditches that are
monitored, controlled and inspected
Non-point discharges are - ANSdischarges that have intermittent, dispersed flows having
little or no control
The Texas Water Code establishes the protection of water quality and quantity of the state
by - ANSsetting stream standards, issues permits for discharges, identifies non-point source
controls, and establishes water reuse.
The wastewater plant operator is primarily responsible for - ANStreating wastewater
discharged into the community
Chapter ___ of the Texas Water Code is the state law controlling water pollution and ___
authority to control discharges in Texas - ANSChapter 26 and Texas Commission of
Environmental Quality
The Texas Commission on Environmental Quality can revoke an operator's license if the
operator - ANScauses permit violation, falsifies records or neglects their duty
If accidental discharge, bypass, or spill (SSO) of wastewater occurs the responsible party
MUST notify TCEQ regional offices within ____ hours - ANS24
Aerobic Bacteria require_____ in the water for their metabolism - ANSoxygen
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