ALABAMA WASTEWATER
COLLECTION GRADE 1 C EXAM
QUESTIONS AND DETAILED ANSWERS.
EXPERT VERIFIED FOR GUARANTEED
PASS.
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
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
,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 - 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
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
,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 - 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
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, A minimum scouring velocity of 2 ft/sec in sewers is
necessary so that
a. Flow velocities can be estimated between manholes
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
4 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
COLLECTION GRADE 1 C EXAM
QUESTIONS AND DETAILED ANSWERS.
EXPERT VERIFIED FOR GUARANTEED
PASS.
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
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
,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 - 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
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
,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 - 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
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, A minimum scouring velocity of 2 ft/sec in sewers is
necessary so that
a. Flow velocities can be estimated between manholes
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
4 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
