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Alabama Wastewater Collection Grade 1 C
Exam (2025) UPDATE Verified Questions
And Answers | With 100% Correct Answers
graded A+ Guaranteed Success!!
A flow of 60 gph is equal to?
a. 1 mgd
b. 1mg/L
c. 10 gpm
d. 1 gpm Ans: — d. 1 gpm (60 gph / 60 min/hr )
The slope of a sewer is measured by
a. The difference from the crown to the invert
b. The difference in invert elevations over the length
of the pipe
c. Using the diameter of the pipe
d. Only entering the manhole Ans: — b. The difference in invert
elevation over the length
of the pipe
An air gap can be used to
a. Clean sewer blockages caused by grease
b. Let air into manholes
c. Prevent backflow of wastewater into a drinking
© 2025 All rights reserved
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water supply
d. Test for oxygen deficiency in manholes Ans: — c. Prevent
backflow of wastewater into a drinking
water supply.
A cross connection is
a. Cast Iron pipe connected to concrete pipe
b. Steel pipe connected to asbestos pipe
c. Potable (Drinkable) water pipe connected to a supply
of questionable origin
d. Lateral line connected to an interceptor Ans: — c. Potable
(Drinkable) water pipe connected to a
supply of questionable origin
Wastewater carried in a collection system may come from
a. Digester supernatant
b. Exfiltration
c. Primary settling tank
d. Inflow Ans: — d. Inflow
When using any hydraulic sewer cleaning method, care must be
taken by the operator
a. To always plug the downstream manhole
b. Not to cause flooding in homes and businesses
c. To prevent any sir gap from occurring
d. To throttle flows from the hydrants by using
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the hydrant valve only Ans: — b. Not to cause flooding in homes
and businesses
Disease producing bacteria are called
a. Saprophytic
b. Facultative
c. Pathogenic
d. Parasitic Ans: — c. Pathogenic
A manhole with a center grating is normally used for
a. Venting
b. Storm sewers
c. Sanitary sewers
d. None of the above Ans: — b. Storm sewers
A pig would be used as ________________in a force
main.
a. A reamer
b. A stopper
c. A Float
d. A tell tale Ans: — a. A reamer
A minimum scouring velocity of 2 ft/sec in sewers is
necessary so that
a. Flow velocities can be estimated between manholes
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b. Roots won't grow in sewers
c. Sewer pipes won't become eroded on the bottom
d. Solids won't build up in a sewer and
reduce flow capacity Ans: — d. Solids won't build up in a sewer
and reduce flow capacity
A cross connection is best defined as
a. Ground water entering a gravity sewer through
cracks in the piping
b. A lateral line connected to the main illegally
c. Storm drainage piped into a domestic
collection system
d. A potable water supply connected to a potential source
of pollution. Ans: — d. A potable water supply connected to a
potential
source of pollution.
When dealing with collection systems, I & I refers to
a. Inflow and inspection
b. inspection and information
c. infiltration and inflow
d. None of the above Ans: — c. infiltration and inflow
Corrosion of sewer pipes may be caused by
a. Laminar flow through them
© 2025 All rights reserved
Alabama Wastewater Collection Grade 1 C
Exam (2025) UPDATE Verified Questions
And Answers | With 100% Correct Answers
graded A+ Guaranteed Success!!
A flow of 60 gph is equal to?
a. 1 mgd
b. 1mg/L
c. 10 gpm
d. 1 gpm Ans: — d. 1 gpm (60 gph / 60 min/hr )
The slope of a sewer is measured by
a. The difference from the crown to the invert
b. The difference in invert elevations over the length
of the pipe
c. Using the diameter of the pipe
d. Only entering the manhole Ans: — b. The difference in invert
elevation over the length
of the pipe
An air gap can be used to
a. Clean sewer blockages caused by grease
b. Let air into manholes
c. Prevent backflow of wastewater into a drinking
© 2025 All rights reserved
, 2 | Page
water supply
d. Test for oxygen deficiency in manholes Ans: — c. Prevent
backflow of wastewater into a drinking
water supply.
A cross connection is
a. Cast Iron pipe connected to concrete pipe
b. Steel pipe connected to asbestos pipe
c. Potable (Drinkable) water pipe connected to a supply
of questionable origin
d. Lateral line connected to an interceptor Ans: — c. Potable
(Drinkable) water pipe connected to a
supply of questionable origin
Wastewater carried in a collection system may come from
a. Digester supernatant
b. Exfiltration
c. Primary settling tank
d. Inflow Ans: — d. Inflow
When using any hydraulic sewer cleaning method, care must be
taken by the operator
a. To always plug the downstream manhole
b. Not to cause flooding in homes and businesses
c. To prevent any sir gap from occurring
d. To throttle flows from the hydrants by using
© 2025 All rights reserved
, 3 | Page
the hydrant valve only Ans: — b. Not to cause flooding in homes
and businesses
Disease producing bacteria are called
a. Saprophytic
b. Facultative
c. Pathogenic
d. Parasitic Ans: — c. Pathogenic
A manhole with a center grating is normally used for
a. Venting
b. Storm sewers
c. Sanitary sewers
d. None of the above Ans: — b. Storm sewers
A pig would be used as ________________in a force
main.
a. A reamer
b. A stopper
c. A Float
d. A tell tale Ans: — a. A reamer
A minimum scouring velocity of 2 ft/sec in sewers is
necessary so that
a. Flow velocities can be estimated between manholes
© 2025 All rights reserved
, 4 | Page
b. Roots won't grow in sewers
c. Sewer pipes won't become eroded on the bottom
d. Solids won't build up in a sewer and
reduce flow capacity Ans: — d. Solids won't build up in a sewer
and reduce flow capacity
A cross connection is best defined as
a. Ground water entering a gravity sewer through
cracks in the piping
b. A lateral line connected to the main illegally
c. Storm drainage piped into a domestic
collection system
d. A potable water supply connected to a potential source
of pollution. Ans: — d. A potable water supply connected to a
potential
source of pollution.
When dealing with collection systems, I & I refers to
a. Inflow and inspection
b. inspection and information
c. infiltration and inflow
d. None of the above Ans: — c. infiltration and inflow
Corrosion of sewer pipes may be caused by
a. Laminar flow through them
© 2025 All rights reserved
