Texas Wastewater Class C 2026 Licensing
Exam COMPLETE 200 Questions Fully Solved
TCEQ ORIGINAL BLUEPRINT (GUARANTEED
PASS)
Who reviews plans and specifications for new construction projects before construction
begins?
TCEQ
Water quality fees may be as high as ____________ per permit?
$115,000
Administrative penalties, up to __________ per day for each violation, may be assessed against
any violator.
$25,000
Direct filtration of secondary effluent is often used to reduce _____ solids to low levels.
suspended
The most important factor affecting filter performance is the _____ of the secondary effluent
applied to the filter.
quality
Proper __________ is essential to filter performance.
cleaning
What is the absorbent most commonly used for water treatment?
Activated carbon
The use of granular activated carbon (GAC) for ______________ removal is common.
organic
What can cause problems in granular activated carbon (GAC) treatment?
biological growth
,Every city with more than ________ in population needs to establish a water pollution control
program and hire qualified personnel to administer it.
10,000
State law requires that reports are to be submitted no later than the ________th day of the
following month.
20
What are major surface waters classified as for the purposes of water quality management
and designation of site-specific standards?
segments
Inflow
direct discharges of storm water or surface water into a wastewater collection system (storm
drains, roof gutters, yard drains, basement sump pumps and broken manholes and wastewater
lines).
How many gallons per day will each person contribute to the wastewater treatment plant?
100
How much BOD will each person contribute to the wastewater treatment plant each day?
0.17
Cause of septic wastewater
bacterial action
Classifications of solids in wastewater
fixed/ash, suspended/dissolved, organic/inorganic
Organic compounds in wastewater include
carbon, hydrogen and oxygen (animal and vegetable in nature)
Type of organic matter present in wastewater
proteins
BOD is a measure of what?
oxygen used up
, Ways that oxygen can be depleted in streams
untreated waste discharges, algae masses at night, and high BOD in the effluent
Cycles of decay include
carbon, nitrogen and sulfur
A flow totalizer is required when the plant design flow is more than
0.5 MGD
Non-hazardous wastes include
chlorides, alkalinity, color, phosphorous and iron
Hazardous wastes include
cyanide, sulfides, organics and gasoline
Synergistic Effect
reaction between waste streams
How many cubic feet of screenings per million gallons of wastewater will coarse screens
remove?
0.5 to 6.0
Preaeration benefits
freshen wastewater, scour gases and remove grease
Main purpose of sedimentation tank
allow scum to rise and solids to settle under quiescent (low velocity) conditions
How much settleable solids is removed in primary settling?
90-95%
How much suspended solids is removed in primary settling?
50-70%
How much BOD is removed in primary settling?
35%
Exam COMPLETE 200 Questions Fully Solved
TCEQ ORIGINAL BLUEPRINT (GUARANTEED
PASS)
Who reviews plans and specifications for new construction projects before construction
begins?
TCEQ
Water quality fees may be as high as ____________ per permit?
$115,000
Administrative penalties, up to __________ per day for each violation, may be assessed against
any violator.
$25,000
Direct filtration of secondary effluent is often used to reduce _____ solids to low levels.
suspended
The most important factor affecting filter performance is the _____ of the secondary effluent
applied to the filter.
quality
Proper __________ is essential to filter performance.
cleaning
What is the absorbent most commonly used for water treatment?
Activated carbon
The use of granular activated carbon (GAC) for ______________ removal is common.
organic
What can cause problems in granular activated carbon (GAC) treatment?
biological growth
,Every city with more than ________ in population needs to establish a water pollution control
program and hire qualified personnel to administer it.
10,000
State law requires that reports are to be submitted no later than the ________th day of the
following month.
20
What are major surface waters classified as for the purposes of water quality management
and designation of site-specific standards?
segments
Inflow
direct discharges of storm water or surface water into a wastewater collection system (storm
drains, roof gutters, yard drains, basement sump pumps and broken manholes and wastewater
lines).
How many gallons per day will each person contribute to the wastewater treatment plant?
100
How much BOD will each person contribute to the wastewater treatment plant each day?
0.17
Cause of septic wastewater
bacterial action
Classifications of solids in wastewater
fixed/ash, suspended/dissolved, organic/inorganic
Organic compounds in wastewater include
carbon, hydrogen and oxygen (animal and vegetable in nature)
Type of organic matter present in wastewater
proteins
BOD is a measure of what?
oxygen used up
, Ways that oxygen can be depleted in streams
untreated waste discharges, algae masses at night, and high BOD in the effluent
Cycles of decay include
carbon, nitrogen and sulfur
A flow totalizer is required when the plant design flow is more than
0.5 MGD
Non-hazardous wastes include
chlorides, alkalinity, color, phosphorous and iron
Hazardous wastes include
cyanide, sulfides, organics and gasoline
Synergistic Effect
reaction between waste streams
How many cubic feet of screenings per million gallons of wastewater will coarse screens
remove?
0.5 to 6.0
Preaeration benefits
freshen wastewater, scour gases and remove grease
Main purpose of sedimentation tank
allow scum to rise and solids to settle under quiescent (low velocity) conditions
How much settleable solids is removed in primary settling?
90-95%
How much suspended solids is removed in primary settling?
50-70%
How much BOD is removed in primary settling?
35%
