WASTEWATER CLASS B TEXAS EXAM WITH
QUESTIONS AND VERIFIED ANSWERS||
ALREADY GRADED A+|| GUARANTEED PASS||
LATEST VERSION 2025
Trench safety is a great concern in Texas. OSHA requires that anytime an
excavation is greater than __ feet deep it must be protected by ______. -
ANSWER-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. - ANSWER-3 feet / 25 feet laterally
A ____________ would be the best to determine if a storm drain is connected to
a sanitary sewer line. - ANSWER-Smoke Test
_________ would most commonly be used to seal a number of joint leaks on a
main with minimal interruption - ANSWER-internal grouting
Preliminary treatment of wastewater would include: - ANSWER-Coarse or fine
screening, grinding and grit removal and grease removal and pre-aeration
Primary treatment of wastewater would include - ANSWER-settling tanks or
basins, scum collection and removal, sludge collection and removal
,In the activated sludge process, Mass Balance refers to - ANSWER-Maintaining
the balance between Return Sludge Flow, Return Sludge, Aeration tank volume,
Mixed liquor suspended solids
In the activated sludge process, the terms F/M ratio is important because this
refers to - ANSWER-Food to Microorganism Ratio
In the activated sludge process, the F/M Ratio is calculated by ______ the
pounds of _________ by the pounds of MLVSS in the ___________. -
ANSWER-Dividing/ Incoming BOD/ aeration tank
In the activated sludge process, the term Gould Sludge Age refers to -
ANSWER-How long in days a pound of solids stays in the aerator
In the activated sludge process, Gould Sludge Age (GSA) is calculated by -
ANSWER-Dividing the total pounds of TSS in the aerator by the pounds of
TSS entering the aerator as raw
In the activated sludge process, the term Mean Cell Residence Time (MCRT)
refers to - ANSWER-The amount of time the living cells are kept in the plant
In the activated sludge process, daily observation of the aeration basin treatment
processes are essential. The operator should pay close attention to - ANSWER-
Surface turbulence, Foam, Odors, & Color
In the activated sludge process, daily observation of the final clarifier is also
essential. The operator should pay close attention to - ANSWER-Surface scum,
Sludge blanket, Weir Flow, Rising solids, & Clarifier overflow
In the activated sludge process, five (5) Important control parameters are -
ANSWER-Dissolved Oxygen level, Aerator solids level, Solids quality, Rate of
returned sludge, & Wasting rate
, In the activated sludge process, Dissolved Oxygen levels throughout the
aeration basins are measured using a portable DO meter. The operator should
keep DO levels between ______ and _______. - ANSWER-2 mg/L and 4.0
mg/L
In the activated sludge process, "Classic Bulking" is a common problem
typically caused by - ANSWER-Low density sludge
In the activated sludge process, Sludge Rising differs from "Sludge Bulking"
and "Sludge Rising" is typically associated - ANSWER-Nitrification - De-
nitrification process
In the activated sludge process, techniques used to reduce "Frothing &
Foaming" typically include - ANSWER-Adjusting sludge age, Reducing the
amount of air, Spraying the frothing area with water, Applying de-foaming
agents
In the activated sludge process, floc is very important to the settling process.
Floc is composed primarily of - ANSWER-Bacteria, Protozoa, Microscopic
Animals, & Fungi
Secondary treatment typically used today would include - ANSWER-
Stabilization ponds, trickling filters, rotating biological contractors (RBC) &
activated sludge
Essential components of the wastewater collection system include - ANSWER-
Sewer mains & piping, Lift Stations, Pumps, Grease & Sand traps, & Manholes
Grit removal would be considered - ANSWER-A part of Preliminary Treatment
QUESTIONS AND VERIFIED ANSWERS||
ALREADY GRADED A+|| GUARANTEED PASS||
LATEST VERSION 2025
Trench safety is a great concern in Texas. OSHA requires that anytime an
excavation is greater than __ feet deep it must be protected by ______. -
ANSWER-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. - ANSWER-3 feet / 25 feet laterally
A ____________ would be the best to determine if a storm drain is connected to
a sanitary sewer line. - ANSWER-Smoke Test
_________ would most commonly be used to seal a number of joint leaks on a
main with minimal interruption - ANSWER-internal grouting
Preliminary treatment of wastewater would include: - ANSWER-Coarse or fine
screening, grinding and grit removal and grease removal and pre-aeration
Primary treatment of wastewater would include - ANSWER-settling tanks or
basins, scum collection and removal, sludge collection and removal
,In the activated sludge process, Mass Balance refers to - ANSWER-Maintaining
the balance between Return Sludge Flow, Return Sludge, Aeration tank volume,
Mixed liquor suspended solids
In the activated sludge process, the terms F/M ratio is important because this
refers to - ANSWER-Food to Microorganism Ratio
In the activated sludge process, the F/M Ratio is calculated by ______ the
pounds of _________ by the pounds of MLVSS in the ___________. -
ANSWER-Dividing/ Incoming BOD/ aeration tank
In the activated sludge process, the term Gould Sludge Age refers to -
ANSWER-How long in days a pound of solids stays in the aerator
In the activated sludge process, Gould Sludge Age (GSA) is calculated by -
ANSWER-Dividing the total pounds of TSS in the aerator by the pounds of
TSS entering the aerator as raw
In the activated sludge process, the term Mean Cell Residence Time (MCRT)
refers to - ANSWER-The amount of time the living cells are kept in the plant
In the activated sludge process, daily observation of the aeration basin treatment
processes are essential. The operator should pay close attention to - ANSWER-
Surface turbulence, Foam, Odors, & Color
In the activated sludge process, daily observation of the final clarifier is also
essential. The operator should pay close attention to - ANSWER-Surface scum,
Sludge blanket, Weir Flow, Rising solids, & Clarifier overflow
In the activated sludge process, five (5) Important control parameters are -
ANSWER-Dissolved Oxygen level, Aerator solids level, Solids quality, Rate of
returned sludge, & Wasting rate
, In the activated sludge process, Dissolved Oxygen levels throughout the
aeration basins are measured using a portable DO meter. The operator should
keep DO levels between ______ and _______. - ANSWER-2 mg/L and 4.0
mg/L
In the activated sludge process, "Classic Bulking" is a common problem
typically caused by - ANSWER-Low density sludge
In the activated sludge process, Sludge Rising differs from "Sludge Bulking"
and "Sludge Rising" is typically associated - ANSWER-Nitrification - De-
nitrification process
In the activated sludge process, techniques used to reduce "Frothing &
Foaming" typically include - ANSWER-Adjusting sludge age, Reducing the
amount of air, Spraying the frothing area with water, Applying de-foaming
agents
In the activated sludge process, floc is very important to the settling process.
Floc is composed primarily of - ANSWER-Bacteria, Protozoa, Microscopic
Animals, & Fungi
Secondary treatment typically used today would include - ANSWER-
Stabilization ponds, trickling filters, rotating biological contractors (RBC) &
activated sludge
Essential components of the wastewater collection system include - ANSWER-
Sewer mains & piping, Lift Stations, Pumps, Grease & Sand traps, & Manholes
Grit removal would be considered - ANSWER-A part of Preliminary Treatment
