Page 1 of 42
TEXAS WASTEWATER B FINAL EXAM | {LATEST
2026/ 2027 UPDATE} COMPLETE ACTUAL AND
AUTHENTIC EXAM | BRAND NEW!
The typical pH of an influent entering the plant will vary from
6.5 to 8.0
Organic matter in wastewater can be ______or________and makes up
approximately _______% of the total solids
Dissolved or Suspended / 65
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
,Page 2 of 42
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
,Page 3 of 42
Common operating problems with a trickling filter include
Ponding, Filter files, Odors, Clogging of Nozzles, & Snails
Wastewater Stabilization Ponds are an approved process for
wastewater treatment. Organic loading of Stabilization Ponds is
typically
35 lbs BOD/Acre/Day with a minimum of 30 days detention time
Wastewater Stabilization Ponds work through a complex process
which includes
Sunlight, Oxygen, Nutrients, Algae, and Bacteria
Facultative Lagoons have two zones of treatment
an aerobic surface layer and an anaerobic bottom layer
Typically one could expect ____ % BOD removal in a Facultative
Lagoon
, Page 4 of 42
50
Aerated Lagoons rely on ______ to provide ____and _____
Mechanical aeration/ Aeration & mixing
The most common method of dewatering and drying sludge is
drying bed
Digester gas typically contains about ________%_______
65-75% methane
The depth of sludge drawn to a drying bed should be
Approximately 9 inches
Newly hired personnel have _________to become licensed.
1 year
TEXAS WASTEWATER B FINAL EXAM | {LATEST
2026/ 2027 UPDATE} COMPLETE ACTUAL AND
AUTHENTIC EXAM | BRAND NEW!
The typical pH of an influent entering the plant will vary from
6.5 to 8.0
Organic matter in wastewater can be ______or________and makes up
approximately _______% of the total solids
Dissolved or Suspended / 65
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
,Page 2 of 42
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
,Page 3 of 42
Common operating problems with a trickling filter include
Ponding, Filter files, Odors, Clogging of Nozzles, & Snails
Wastewater Stabilization Ponds are an approved process for
wastewater treatment. Organic loading of Stabilization Ponds is
typically
35 lbs BOD/Acre/Day with a minimum of 30 days detention time
Wastewater Stabilization Ponds work through a complex process
which includes
Sunlight, Oxygen, Nutrients, Algae, and Bacteria
Facultative Lagoons have two zones of treatment
an aerobic surface layer and an anaerobic bottom layer
Typically one could expect ____ % BOD removal in a Facultative
Lagoon
, Page 4 of 42
50
Aerated Lagoons rely on ______ to provide ____and _____
Mechanical aeration/ Aeration & mixing
The most common method of dewatering and drying sludge is
drying bed
Digester gas typically contains about ________%_______
65-75% methane
The depth of sludge drawn to a drying bed should be
Approximately 9 inches
Newly hired personnel have _________to become licensed.
1 year
