1|Page
TEXAS WASTEWATER CLASS A TEST 2026/2027
EXAM QUESTIONS ACCURATE ACTUAL
EXAM||VERIFIED EXAM!!! FREQUENTLY TESTED
QUESTIONS WITH DETAILED ANSWERS |
GUARANTEED PASS | GRADED A+||NEWEST EXAM!!!
An industrial complex has a BOD discharge to the POTW
of 500 pounds per day. The population equivalent of this
industry is 500 lbs = 2,941 0.17 lbs BOD person -
Answers-2941
The parameters of the BOD test are - Answers-5 days at
20° Centigrade
Standard Dimension Ratio in pvc pipe is defined as -
Answers-Ratio of OD pipe diameter to wall thickness
How should shoring be removed from a trench? -
Answers-up from the bottom up
In low pressure sewer systems where each tap must have
a grinder pump lift station, station is considered to be -
,2|Page
Answers-part of the collection system and the
responsibility of the utility
Effective communication depends on - Answers-being a
good listener
When designing a wastewater collection system, the
engineer considers the population for how many years in
the future? - Answers-50
According to 30 TAC Chapter 317, all pipe and fittings
used in wastewater pressure shall have a minimum psi
pressure rating of - Answers-150
The minimum velocity of flow in a wastewater line should
be - Answers-2.0 fps
At a construction job site, as the roadway speed
increases, the spacing between cones and barricades
should - Answers-increase
The major cause of wastewater line stoppages is -
Answers-roots and grease
,3|Page
The smallest pipe size for air recirculation of a self-priming
centrifugal pump is - Answers-1 inch
Dangerous gases in a confined space may not be
detected with the physical senses because - Answers-
some gases have no odor some gases may deaden the
sense of smell some gases may displace the oxygen (all
of the above)
What are the dangerous gases a collection system worker
might come into contact with? - Answers-CO2 CO НaS
CH4 (all of the above)
On a construction job site, equipment booms must
maintain at least how many feet of clearance from
overhead electric lines? - Answers-10
How should trench shoring be installed? - Answers-to
above the top of the trench
When setting work goals for an employee, the goals
should be - Answers-accompanied by an action plan
, 4|Page
According to Chapter 317, Design Criteria, a manhole can
be installed within 9 feet of an existing waterline if -
Answers-the manhole is completely watertight and tested
for no leakage
As the population of a collection system increases, the
ratio of peak flow to average daily flow will - Answers-
decrease
Seeding of BOD samples is necessary when samples -
Answers-(All of the above) have a chlorine residual, have
a previously been chlorinated, have been subjected to
high temperatures, contain high or low pH industrial
wastes
When is blue-green algae the most dominant on a pond
treatment system? - Answers-Summer
A 30-inch diameter wastewater interceptor is observed to
be flowing half-full at about two fps. The approximate
volume of wastewater flowing through the pipe is
3.14x1.25 x 1.25 x 2 = 4.9 cfs x 449 = 2,200 gpm -
Answers-c. 2,200 gallons per minute
TEXAS WASTEWATER CLASS A TEST 2026/2027
EXAM QUESTIONS ACCURATE ACTUAL
EXAM||VERIFIED EXAM!!! FREQUENTLY TESTED
QUESTIONS WITH DETAILED ANSWERS |
GUARANTEED PASS | GRADED A+||NEWEST EXAM!!!
An industrial complex has a BOD discharge to the POTW
of 500 pounds per day. The population equivalent of this
industry is 500 lbs = 2,941 0.17 lbs BOD person -
Answers-2941
The parameters of the BOD test are - Answers-5 days at
20° Centigrade
Standard Dimension Ratio in pvc pipe is defined as -
Answers-Ratio of OD pipe diameter to wall thickness
How should shoring be removed from a trench? -
Answers-up from the bottom up
In low pressure sewer systems where each tap must have
a grinder pump lift station, station is considered to be -
,2|Page
Answers-part of the collection system and the
responsibility of the utility
Effective communication depends on - Answers-being a
good listener
When designing a wastewater collection system, the
engineer considers the population for how many years in
the future? - Answers-50
According to 30 TAC Chapter 317, all pipe and fittings
used in wastewater pressure shall have a minimum psi
pressure rating of - Answers-150
The minimum velocity of flow in a wastewater line should
be - Answers-2.0 fps
At a construction job site, as the roadway speed
increases, the spacing between cones and barricades
should - Answers-increase
The major cause of wastewater line stoppages is -
Answers-roots and grease
,3|Page
The smallest pipe size for air recirculation of a self-priming
centrifugal pump is - Answers-1 inch
Dangerous gases in a confined space may not be
detected with the physical senses because - Answers-
some gases have no odor some gases may deaden the
sense of smell some gases may displace the oxygen (all
of the above)
What are the dangerous gases a collection system worker
might come into contact with? - Answers-CO2 CO НaS
CH4 (all of the above)
On a construction job site, equipment booms must
maintain at least how many feet of clearance from
overhead electric lines? - Answers-10
How should trench shoring be installed? - Answers-to
above the top of the trench
When setting work goals for an employee, the goals
should be - Answers-accompanied by an action plan
, 4|Page
According to Chapter 317, Design Criteria, a manhole can
be installed within 9 feet of an existing waterline if -
Answers-the manhole is completely watertight and tested
for no leakage
As the population of a collection system increases, the
ratio of peak flow to average daily flow will - Answers-
decrease
Seeding of BOD samples is necessary when samples -
Answers-(All of the above) have a chlorine residual, have
a previously been chlorinated, have been subjected to
high temperatures, contain high or low pH industrial
wastes
When is blue-green algae the most dominant on a pond
treatment system? - Answers-Summer
A 30-inch diameter wastewater interceptor is observed to
be flowing half-full at about two fps. The approximate
volume of wastewater flowing through the pipe is
3.14x1.25 x 1.25 x 2 = 4.9 cfs x 449 = 2,200 gpm -
Answers-c. 2,200 gallons per minute
