TEXAS WASTEWATER CLASS B TEST
2026/2027 EXAM QUESTIONS ACCURATE
ACTUAL EXAM / FREQUENTLY TESTED
QUESTIONS WITH DETAILED ANSWERS |
GUARANTEED PASS | GRADED A | LATEST
UPDATE
What must be used when connecting a potable water
supply to a lift station? - ....ANSWER...an air gap between
the pump and the water line twice the diameter of the water
line or at least 1", whichever is greater
What is the problem if the supernatant in the settleometer
is clear but the effluent is not? - ....ANSWER...1. Bulking
2. An equipment malfuntion such as a plugged R.A.S. or
W.A.S. line
3. problem in secondary clarifier
Why does flow through a clarifier move up slowly? -
....ANSWER...to keep floc particles from coming over the
wiers
,when should a manhole be placed? - ....ANSWER...at least
every 500 feet or whenever necessary
Where should the sludge in the clarifier be kept in the
activated sludge process? - ....ANSWER...bottom quarter
An S.V.I. of 180 represents what? - ....ANSWER...old
bulking sludge
What should be done to remove micro organisms from an
activated sludge plant? - ....ANSWER...waste
What is the preliminary treatments main purpose? -
....ANSWER...remove large solids
what are the considerations for writing a permit? -
....ANSWER...impact on receiving stream
What is an adequate B.O.D. for the contact stabilization
ponds best function? - ....ANSWER...at least 35
lbs/acer/day
,what is fecal coliform measured in? - ....ANSWER...a
geometric mean
how should the bell end of a pipe be laid? -
....ANSWER...uphill
what 5 types of pipe are commonly used in collection
systems? - ....ANSWER...1. PVC
2. concrete
3. asbestos concrete
4. ductile iron
5. clay
what are 3 characteristics of fresh domestic sewage? -
....ANSWER...1. dishwater color
2. slight fecal odor
3. 99.9 percent water
What test should be run within 15 minutes of grabbing the
final effluent sample? - ....ANSWER...PH test
, What does S.V.I. mean? - ....ANSWER...sludge volume
index
what is the formula for S.V.I.? - ....ANSWER...30 minute
settled sludge volume in ML/L, times 1000, divided by the
M.L.S.S. concentration in MG/L x 1000
What are the 3 different cycles of decay? -
....ANSWER...1. nitrogen
2. sulfur
3. carbon
What percent of moisture should the sludge from a
primary clarifier contain? - ....ANSWER...94-96%
What is sludge in a trickling filter that goes to a clarifier
called? - ....ANSWER...humous sludge
What is B.O.D. in an extended aeration activated sludge
process reduced by? - ....ANSWER...90-95%
2026/2027 EXAM QUESTIONS ACCURATE
ACTUAL EXAM / FREQUENTLY TESTED
QUESTIONS WITH DETAILED ANSWERS |
GUARANTEED PASS | GRADED A | LATEST
UPDATE
What must be used when connecting a potable water
supply to a lift station? - ....ANSWER...an air gap between
the pump and the water line twice the diameter of the water
line or at least 1", whichever is greater
What is the problem if the supernatant in the settleometer
is clear but the effluent is not? - ....ANSWER...1. Bulking
2. An equipment malfuntion such as a plugged R.A.S. or
W.A.S. line
3. problem in secondary clarifier
Why does flow through a clarifier move up slowly? -
....ANSWER...to keep floc particles from coming over the
wiers
,when should a manhole be placed? - ....ANSWER...at least
every 500 feet or whenever necessary
Where should the sludge in the clarifier be kept in the
activated sludge process? - ....ANSWER...bottom quarter
An S.V.I. of 180 represents what? - ....ANSWER...old
bulking sludge
What should be done to remove micro organisms from an
activated sludge plant? - ....ANSWER...waste
What is the preliminary treatments main purpose? -
....ANSWER...remove large solids
what are the considerations for writing a permit? -
....ANSWER...impact on receiving stream
What is an adequate B.O.D. for the contact stabilization
ponds best function? - ....ANSWER...at least 35
lbs/acer/day
,what is fecal coliform measured in? - ....ANSWER...a
geometric mean
how should the bell end of a pipe be laid? -
....ANSWER...uphill
what 5 types of pipe are commonly used in collection
systems? - ....ANSWER...1. PVC
2. concrete
3. asbestos concrete
4. ductile iron
5. clay
what are 3 characteristics of fresh domestic sewage? -
....ANSWER...1. dishwater color
2. slight fecal odor
3. 99.9 percent water
What test should be run within 15 minutes of grabbing the
final effluent sample? - ....ANSWER...PH test
, What does S.V.I. mean? - ....ANSWER...sludge volume
index
what is the formula for S.V.I.? - ....ANSWER...30 minute
settled sludge volume in ML/L, times 1000, divided by the
M.L.S.S. concentration in MG/L x 1000
What are the 3 different cycles of decay? -
....ANSWER...1. nitrogen
2. sulfur
3. carbon
What percent of moisture should the sludge from a
primary clarifier contain? - ....ANSWER...94-96%
What is sludge in a trickling filter that goes to a clarifier
called? - ....ANSWER...humous sludge
What is B.O.D. in an extended aeration activated sludge
process reduced by? - ....ANSWER...90-95%
