TEXAS WASTEWATER B EXAM STUDY
SHEET 2026 UPDATED QUESTIONS AND
SOLUTIONS
◉ The majority of Dissolved Oxygen in raw sewage comes from.
Answer: Potable Drinking Water
◉ Each person contributes approximately ______ lbs of BOD to the
system daily..
Answer: 0.17
◉ Sources of waste water include.
Answer: domestic, storm water, commercial, food processing,
agricultural and industrial
◉ A sewer manhole provides access into the system for cleaning or
service. A manhole is located.
Answer: at changes in alignment, diameter, grade, direction and
intersection
◉ New manholes must have an inside diameter of at least ______ feet
and the entry access must be at least ____inches..
,Answer: 4 feet and 24 inches
◉ In the past ____ was used to construct manholes. This product is
prohibited for construction or grading today.
Answer: brick and mortar
◉ Verified clay and Poly Vinyl Chloride (PVC) are the most common
pipe materials used for sewer lines but other materials are available
such as.
Answer: ductile iron, cast iron, acrylontrile butadiene styrene (ABS)
Concrete, polyethylene & asbestos concrete
◉ Whenever wastewater cannot flow to the treatment plant by _____
a _____ is typically used.
Answer: gravity/ lift station
◉ The primary cause of stoppage in a collection system is _____ and
_____.
Answer: grease/roots
◉ The _____pump is most commonly used in a lift station.
Answer: centrifugal
, ◉ A centrifugal pump must be ____ or it will not pump.
Answer: primed
◉ ______ gas is very toxic and deadens the sense of ______.
Answer: Hydrogen Sulifide/smell
◉ ______ gas is colorless, odorless and heavier than air.
Answer: Methane
◉ ______ are the smallest , most numerous, and most important of the
activated sludge microorganisms.
Answer: bacteria
◉ Organic loading refers to the pounds per day of ____ per acre feet
or 1,000 cubic feet of filter media.
Answer: BOD
◉ Hydraulic loading refers to the volume of ____, including
recirculation, applied to the filter.
Answer: water
◉ The most common type(s) of trickling filters are-.
SHEET 2026 UPDATED QUESTIONS AND
SOLUTIONS
◉ The majority of Dissolved Oxygen in raw sewage comes from.
Answer: Potable Drinking Water
◉ Each person contributes approximately ______ lbs of BOD to the
system daily..
Answer: 0.17
◉ Sources of waste water include.
Answer: domestic, storm water, commercial, food processing,
agricultural and industrial
◉ A sewer manhole provides access into the system for cleaning or
service. A manhole is located.
Answer: at changes in alignment, diameter, grade, direction and
intersection
◉ New manholes must have an inside diameter of at least ______ feet
and the entry access must be at least ____inches..
,Answer: 4 feet and 24 inches
◉ In the past ____ was used to construct manholes. This product is
prohibited for construction or grading today.
Answer: brick and mortar
◉ Verified clay and Poly Vinyl Chloride (PVC) are the most common
pipe materials used for sewer lines but other materials are available
such as.
Answer: ductile iron, cast iron, acrylontrile butadiene styrene (ABS)
Concrete, polyethylene & asbestos concrete
◉ Whenever wastewater cannot flow to the treatment plant by _____
a _____ is typically used.
Answer: gravity/ lift station
◉ The primary cause of stoppage in a collection system is _____ and
_____.
Answer: grease/roots
◉ The _____pump is most commonly used in a lift station.
Answer: centrifugal
, ◉ A centrifugal pump must be ____ or it will not pump.
Answer: primed
◉ ______ gas is very toxic and deadens the sense of ______.
Answer: Hydrogen Sulifide/smell
◉ ______ gas is colorless, odorless and heavier than air.
Answer: Methane
◉ ______ are the smallest , most numerous, and most important of the
activated sludge microorganisms.
Answer: bacteria
◉ Organic loading refers to the pounds per day of ____ per acre feet
or 1,000 cubic feet of filter media.
Answer: BOD
◉ Hydraulic loading refers to the volume of ____, including
recirculation, applied to the filter.
Answer: water
◉ The most common type(s) of trickling filters are-.
