1|Page
TEXAS CLASS B WATER FINAL EXAM 2026 EXAM
ACCURATE ACTUAL EXAM||VERIFIED
EXAM!!!FREQUENTLY TESTED QUESTIONS WITH
DETAILED ANSWERS | GUARANTEED PASS |
GRADED A+ |NEWEST EXAM!!
A properly designed and operated primary sedimentation
tank should remove _____ percent of incoming BOD -
Answers-30-40%
Devices that may be used to determine the level of
sewage in a lift station - Answers-air bubbler, floats,
electrodes, Acoustic (sonic)
What is the most important role of aerobic bacteria in the
treatment of wastewater? - Answers-decompose organic
matter
The hydraulic loading of a trickling filter may be
determined by - Answers-flow rate and filter area
These can be used to dewater sludge - Answers-belt
press, drying beds, solid bowl centrifuge, gravity thickener
,2|Page
Most important to providing adequate sewage treatment in
a stabilization pond - Answers-sunlight, algae, bacteria
and time
Offensive and objectionable odors which sometimes occur
in trickling filters usually indicate - Answers-septic
conditions are present
Dissolved Oxygen (DO) in aeration tank of an activated
sludge plant should be maintained at or about - Answers-2
to 4 mg/L
Contributes to the infiltration in a collection system -
Answers-breaks in the main lines, high ground water
levels, heavy rains, hydro jet cleaning plugged mains
When a centrifuge pump loses prime the - Answers-pump
is no longer moving liquid
A Rotating Biological Contactor (RBC) is - Answers-fixed
firm biological treatment process
,3|Page
The name of the State Agency responsible for enforcing
pollution control laws in Texas - Answers-Texas
Commission of Environmental Quality
The term pathogenic means - Answers-Capable of
causing disease
The minimum separation between sewer lines and potable
water lines is - Answers-9 feet
A licensed wastewater operator is a professional -
Answers-consistently 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 - Answers-Filtering a sample
The Biochemical oxygen Demand (BOD) of a sample is
based on - Answers-Measuring the dissolved oxygen (DO)
used
, 4|Page
The results of Biochemical Oxygen Demand (BOD)
sample taken at a treatment plant tells the operator -
Answers-How 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? -
Answers-Natural gas, gasoline fumes, hydrogen sulfide
and carbon dioxide
A preferred hydraulic method of cleaning sewer lines is -
Answers-Hydro Jet Cleaner
Ways to reduce bad odors coming from a collection
system - Answers-routinely 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 - Answers-ductile iron, Poly Vinyl
Chloride (PVC)
Before entering a confined space a worker should -
Answers-Use approved monitoring device and check for
TEXAS CLASS B WATER FINAL EXAM 2026 EXAM
ACCURATE ACTUAL EXAM||VERIFIED
EXAM!!!FREQUENTLY TESTED QUESTIONS WITH
DETAILED ANSWERS | GUARANTEED PASS |
GRADED A+ |NEWEST EXAM!!
A properly designed and operated primary sedimentation
tank should remove _____ percent of incoming BOD -
Answers-30-40%
Devices that may be used to determine the level of
sewage in a lift station - Answers-air bubbler, floats,
electrodes, Acoustic (sonic)
What is the most important role of aerobic bacteria in the
treatment of wastewater? - Answers-decompose organic
matter
The hydraulic loading of a trickling filter may be
determined by - Answers-flow rate and filter area
These can be used to dewater sludge - Answers-belt
press, drying beds, solid bowl centrifuge, gravity thickener
,2|Page
Most important to providing adequate sewage treatment in
a stabilization pond - Answers-sunlight, algae, bacteria
and time
Offensive and objectionable odors which sometimes occur
in trickling filters usually indicate - Answers-septic
conditions are present
Dissolved Oxygen (DO) in aeration tank of an activated
sludge plant should be maintained at or about - Answers-2
to 4 mg/L
Contributes to the infiltration in a collection system -
Answers-breaks in the main lines, high ground water
levels, heavy rains, hydro jet cleaning plugged mains
When a centrifuge pump loses prime the - Answers-pump
is no longer moving liquid
A Rotating Biological Contactor (RBC) is - Answers-fixed
firm biological treatment process
,3|Page
The name of the State Agency responsible for enforcing
pollution control laws in Texas - Answers-Texas
Commission of Environmental Quality
The term pathogenic means - Answers-Capable of
causing disease
The minimum separation between sewer lines and potable
water lines is - Answers-9 feet
A licensed wastewater operator is a professional -
Answers-consistently 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 - Answers-Filtering a sample
The Biochemical oxygen Demand (BOD) of a sample is
based on - Answers-Measuring the dissolved oxygen (DO)
used
, 4|Page
The results of Biochemical Oxygen Demand (BOD)
sample taken at a treatment plant tells the operator -
Answers-How 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? -
Answers-Natural gas, gasoline fumes, hydrogen sulfide
and carbon dioxide
A preferred hydraulic method of cleaning sewer lines is -
Answers-Hydro Jet Cleaner
Ways to reduce bad odors coming from a collection
system - Answers-routinely 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 - Answers-ductile iron, Poly Vinyl
Chloride (PVC)
Before entering a confined space a worker should -
Answers-Use approved monitoring device and check for
