Alabama Wastewater Collection Grade 1 C
Exam (2025) UPDATE Verified Questions And
Answers | With 100% Correct Answers graded
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A flow of 60 gph is equal to?
a. 1 mgd
b. 1mg/L
c. 10 gpm
d. 1 gpm - ANSWER-d. 1 gpm (60 gph / 60 min/hr )
Question: 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 - ANSWER-b. The difference in invert elevation
over the length
,of the pipe
Question: 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
water supply
d. Test for oxygen deficiency in manholes - ANSWER-c. Prevent backflow of
wastewater into a drinking
water supply.
Question: 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 - ANSWER-c. Potable (Drinkable)
water pipe connected to a
supply of questionable origin
,Question: Wastewater carried in a collection system may come from
a. Digester supernatant
b. Exfiltration
c. Primary settling tank
d. Inflow - ANSWER-d. Inflow
Question: 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
the hydrant valve only - ANSWER-b. Not to cause flooding in homes and
businesses
Question: Disease producing bacteria are called
a. Saprophytic
b. Facultative
c. Pathogenic
, d. Parasitic - ANSWER-c. Pathogenic
Question: A manhole with a center grating is normally used for
a. Venting
b. Storm sewers
c. Sanitary sewers
d. None of the above - ANSWER-b. Storm sewers
Question: A pig would be used as ________________in a force
main.
a. A reamer
b. A stopper
c. A Float
d. A tell tale - ANSWER-a. A reamer
Question: A minimum scouring velocity of 2 ft/sec in sewers is
necessary so that
a. Flow velocities can be estimated between manholes
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 - ANSWER-d. 1 gpm (60 gph / 60 min/hr )
Question: 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 - ANSWER-b. The difference in invert elevation
over the length
,of the pipe
Question: 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
water supply
d. Test for oxygen deficiency in manholes - ANSWER-c. Prevent backflow of
wastewater into a drinking
water supply.
Question: 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 - ANSWER-c. Potable (Drinkable)
water pipe connected to a
supply of questionable origin
,Question: Wastewater carried in a collection system may come from
a. Digester supernatant
b. Exfiltration
c. Primary settling tank
d. Inflow - ANSWER-d. Inflow
Question: 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
the hydrant valve only - ANSWER-b. Not to cause flooding in homes and
businesses
Question: Disease producing bacteria are called
a. Saprophytic
b. Facultative
c. Pathogenic
, d. Parasitic - ANSWER-c. Pathogenic
Question: A manhole with a center grating is normally used for
a. Venting
b. Storm sewers
c. Sanitary sewers
d. None of the above - ANSWER-b. Storm sewers
Question: A pig would be used as ________________in a force
main.
a. A reamer
b. A stopper
c. A Float
d. A tell tale - ANSWER-a. A reamer
Question: A minimum scouring velocity of 2 ft/sec in sewers is
necessary so that
a. Flow velocities can be estimated between manholes
