TEXAS WASTEWATER CLASS B EXAM
2024-2025 WITH ACTUAL CORRECT
QUESTIONS AND VERIFIED DETAILED
ANSWERS |FREQUENTLY TESTED
QUESTIONS AND SOLUTIONS |ALREADY
GRADED A+|NEWEST|GUARANTEED
PASS |LATEST UPDATE
What is the greatest advantage for using fiberglass manholes in areas with high groundwater?
fiberglass is not subject to infiltration
A __________ pump would most likely be used when discharging into a 10" diameter pressure sewer
main.
Centrifugal
Excessive power consumption by a pump could be caused by
Worn bearings and worn impeller
Trench safety is a great concern in Texas. OSHA requires that anytime an excavation is greater than __
feet deep it must be protected by ______.
5 feet / An approved Trench Box, Shoring, or Sloping
In an excavation if a ladder is used as a means of exit, it must extend ________feet above the ground
and be secured and within ____ feet laterally of anyone in the excavation.
3 feet / 25 feet laterally
A ____________ would be the best to determine if a storm drain is connected to a sanitary sewer line.
Smoke Test
1|Page
,_________ would most commonly be used to seal a number of joint leaks on a main with minimal
interruption
internal grouting
Pre-treatment of wastewater would include:
Coarse or fine screening, grinding and grit removal and grease removal and pre-aeration
Primary treatment of wastewater would include
settling tanks or basins, scum collection and removal, sludge collection and removal
Secondary treatment typically used today would include
Stabilization ponds, trickling filters, rotating biological contractors (RBC) & activated sludge
Essential components of the wastewater collection system include
Sewer mains & piping, Lift Stations, Pumps, Grease & Sand traps, & Manholes
Grit removal would be considered
A part of Primary Treatment
The protozoa that causes dysentery would most likely be destroyed by
Disinfection
Using final plant effluent in cooling towers would be a
Beneficial way to reuse treated effluent
TCEQ may authorize discharge of untreated wastewater into or near a receiving stream in extreme
cases. This is referred to as
Bypass
Enforcement action from TCEQ may be taken if pollution or waste violates the Texas Water Code.
Violations of Water Code may include
Unauthorized discharge, accidental discharge & health hazard
Solids in wastewater are classified as
Total (TR), Suspended (TSS), Dissolved (TDS), Settleable (SS), Non-setteable, Floatable, Organic and
Inorganic
Total Suspended Solids (TSS) are those that
Can be filtered out
Total Dissolved Solids (TDS) are those that
cannot be filtered out
2|Page
, Settable Solids (SS) are those that
Settle out when left standing for extended periods of time
Non-settleable Solids are
Small particles that do not settle
Volatile Solids (VSS) are those that
Are determined by burning the residue from the Total Solids determination
Inorganic Solids (ash) are those that
Consist of sand, grit, & minerals and can be suspended or dissolved
Organic matter in wastewater can be ______or________and makes up approximately _______% of the
total solids
Dissolved or Suspended / 65
The typical pH of an influent entering the plant will vary from
6.5 to 8.0
Acute toxicity occurs when
There is a rapid die off of treatment organisms
Chronic toxicity occurs when
Certain microorganisms become inactivated but others continue to work resulting in a sick biological
process
A mechanical device that screens & cuts large solids in small particles
Cumminuter
Detention time in wastewater typically refers to
The time sewage is kept in a sedimentation basis
There are five (5) major components to a trickling filter
Filter floor, underdrain, walls, filter media, & distributer arms
Zoogleal Mass refers to
A thick layer of jelly like slime where organisms bacteria, fungi, protozoa and ciliates thrive.
The efficiency of a trickling filter is measured in
Percent BOD Removed
Common operating problems with a trickling filter include
3|Page
2024-2025 WITH ACTUAL CORRECT
QUESTIONS AND VERIFIED DETAILED
ANSWERS |FREQUENTLY TESTED
QUESTIONS AND SOLUTIONS |ALREADY
GRADED A+|NEWEST|GUARANTEED
PASS |LATEST UPDATE
What is the greatest advantage for using fiberglass manholes in areas with high groundwater?
fiberglass is not subject to infiltration
A __________ pump would most likely be used when discharging into a 10" diameter pressure sewer
main.
Centrifugal
Excessive power consumption by a pump could be caused by
Worn bearings and worn impeller
Trench safety is a great concern in Texas. OSHA requires that anytime an excavation is greater than __
feet deep it must be protected by ______.
5 feet / An approved Trench Box, Shoring, or Sloping
In an excavation if a ladder is used as a means of exit, it must extend ________feet above the ground
and be secured and within ____ feet laterally of anyone in the excavation.
3 feet / 25 feet laterally
A ____________ would be the best to determine if a storm drain is connected to a sanitary sewer line.
Smoke Test
1|Page
,_________ would most commonly be used to seal a number of joint leaks on a main with minimal
interruption
internal grouting
Pre-treatment of wastewater would include:
Coarse or fine screening, grinding and grit removal and grease removal and pre-aeration
Primary treatment of wastewater would include
settling tanks or basins, scum collection and removal, sludge collection and removal
Secondary treatment typically used today would include
Stabilization ponds, trickling filters, rotating biological contractors (RBC) & activated sludge
Essential components of the wastewater collection system include
Sewer mains & piping, Lift Stations, Pumps, Grease & Sand traps, & Manholes
Grit removal would be considered
A part of Primary Treatment
The protozoa that causes dysentery would most likely be destroyed by
Disinfection
Using final plant effluent in cooling towers would be a
Beneficial way to reuse treated effluent
TCEQ may authorize discharge of untreated wastewater into or near a receiving stream in extreme
cases. This is referred to as
Bypass
Enforcement action from TCEQ may be taken if pollution or waste violates the Texas Water Code.
Violations of Water Code may include
Unauthorized discharge, accidental discharge & health hazard
Solids in wastewater are classified as
Total (TR), Suspended (TSS), Dissolved (TDS), Settleable (SS), Non-setteable, Floatable, Organic and
Inorganic
Total Suspended Solids (TSS) are those that
Can be filtered out
Total Dissolved Solids (TDS) are those that
cannot be filtered out
2|Page
, Settable Solids (SS) are those that
Settle out when left standing for extended periods of time
Non-settleable Solids are
Small particles that do not settle
Volatile Solids (VSS) are those that
Are determined by burning the residue from the Total Solids determination
Inorganic Solids (ash) are those that
Consist of sand, grit, & minerals and can be suspended or dissolved
Organic matter in wastewater can be ______or________and makes up approximately _______% of the
total solids
Dissolved or Suspended / 65
The typical pH of an influent entering the plant will vary from
6.5 to 8.0
Acute toxicity occurs when
There is a rapid die off of treatment organisms
Chronic toxicity occurs when
Certain microorganisms become inactivated but others continue to work resulting in a sick biological
process
A mechanical device that screens & cuts large solids in small particles
Cumminuter
Detention time in wastewater typically refers to
The time sewage is kept in a sedimentation basis
There are five (5) major components to a trickling filter
Filter floor, underdrain, walls, filter media, & distributer arms
Zoogleal Mass refers to
A thick layer of jelly like slime where organisms bacteria, fungi, protozoa and ciliates thrive.
The efficiency of a trickling filter is measured in
Percent BOD Removed
Common operating problems with a trickling filter include
3|Page
