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TX Class C Wastewater Treatment License Exam ||
Most Recent Exam Actual Complete Real Verified
Exam Questions And Correct Answers (Verified
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What are major surface waters classified as for the
purposes of water quality management and designation of
site-specific standards? - Answer-segments
Inflow - Answer-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? - Answer-100
How much BOD will each person contribute to the
wastewater treatment plant each day? - Answer-0.17
Cause of septic wastewater - Answer-bacterial action
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Classifications of solids in wastewater - Answer-fixed/ash,
suspended/dissolved, organic/inorganic
Organic compounds in wastewater include - Answer-
carbon, hydrogen and oxygen (animal and vegetable in
nature)
Type of organic matter present in wastewater - Answer-
proteins
BOD is a measure of what? - Answer-oxygen used up
Ways that oxygen can be depleted in streams - Answer-
untreated waste discharges, algae masses at night, and
high BOD in the effluent
A gas found in treatment systems that is NOT dangerous -
Answer-dissolved oxygen
Cycles of decay include - Answer-carbon, nitrogen and
sulfur
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A flow totalizer is required when the plant design flow is
more than - Answer-0.5 MGD
Non-hazardous wastes include - Answer-chlorides,
alkalinity, color, phosphorous and iron
Hazardous wastes include - Answer-cyanide, sulfides,
organics and gasoline
Synergistic Effect - Answer-reaction between waste
streams
How many cubic feet of screenings per million gallons of
wastewater will coarse screens remove? - Answer-0.5 to
6.0
Preaeration benefits - Answer-freshen wastewater, scour
gases and remove grease
Main purpose of sedimentation tank - Answer-allow scum
to rise and solids to settle under quiescent (low velocity)
conditions
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How much settleable solids is removed in primary settling?
- Answer-90-95%
How much suspended solids is removed in primary
settling? - Answer-50-70%
How much BOD is removed in primary settling? - Answer-
35%
How much total organic matter is removed in primary
settling? - Answer-20-30%
What percentage of suspended solids will settle out within
2 hours? - Answer-70%
Required minutes of detention time for peak flow? -
Answer-54
Required minutes of detention time for design flow? -
Answer-108
TX Class C Wastewater Treatment License Exam ||
Most Recent Exam Actual Complete Real Verified
Exam Questions And Correct Answers (Verified
Answers) Already Graded A+ | Guaranteed Success!!
Newest Exam!!!
What are major surface waters classified as for the
purposes of water quality management and designation of
site-specific standards? - Answer-segments
Inflow - Answer-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? - Answer-100
How much BOD will each person contribute to the
wastewater treatment plant each day? - Answer-0.17
Cause of septic wastewater - Answer-bacterial action
,2|Page
Classifications of solids in wastewater - Answer-fixed/ash,
suspended/dissolved, organic/inorganic
Organic compounds in wastewater include - Answer-
carbon, hydrogen and oxygen (animal and vegetable in
nature)
Type of organic matter present in wastewater - Answer-
proteins
BOD is a measure of what? - Answer-oxygen used up
Ways that oxygen can be depleted in streams - Answer-
untreated waste discharges, algae masses at night, and
high BOD in the effluent
A gas found in treatment systems that is NOT dangerous -
Answer-dissolved oxygen
Cycles of decay include - Answer-carbon, nitrogen and
sulfur
,3|Page
A flow totalizer is required when the plant design flow is
more than - Answer-0.5 MGD
Non-hazardous wastes include - Answer-chlorides,
alkalinity, color, phosphorous and iron
Hazardous wastes include - Answer-cyanide, sulfides,
organics and gasoline
Synergistic Effect - Answer-reaction between waste
streams
How many cubic feet of screenings per million gallons of
wastewater will coarse screens remove? - Answer-0.5 to
6.0
Preaeration benefits - Answer-freshen wastewater, scour
gases and remove grease
Main purpose of sedimentation tank - Answer-allow scum
to rise and solids to settle under quiescent (low velocity)
conditions
, 4|Page
How much settleable solids is removed in primary settling?
- Answer-90-95%
How much suspended solids is removed in primary
settling? - Answer-50-70%
How much BOD is removed in primary settling? - Answer-
35%
How much total organic matter is removed in primary
settling? - Answer-20-30%
What percentage of suspended solids will settle out within
2 hours? - Answer-70%
Required minutes of detention time for peak flow? -
Answer-54
Required minutes of detention time for design flow? -
Answer-108
