Alabama Wastewater Collection Grade
1 C questions n answers graded A+
d. 1 gpm (60 gph / 60 min/hr ) - correct answer ✔✔A flow of 60 gph is equal to?
a. 1 mgd
b. 1mg/L
c. 10 gpm
d. 1 gpm
b. The difference in invert elevation over the length
of the pipe - correct answer ✔✔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
c. Prevent backflow of wastewater into a drinking
water supply. - correct answer ✔✔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
c. Potable (Drinkable) water pipe connected to a
supply of questionable origin - correct answer ✔✔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
d. Inflow - correct answer ✔✔Wastewater carried in a collection system may come from
a. Digester supernatant
b. Exfiltration
c. Primary settling tank
d. Inflow
b. Not to cause flooding in homes and businesses - correct answer ✔✔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
c. Pathogenic - correct answer ✔✔Disease producing bacteria are called
a. Saprophytic
b. Facultative
c. Pathogenic
d. Parasitic
b. Storm sewers - correct answer ✔✔A manhole with a center grating is normally used for
a. Venting
b. Storm sewers
c. Sanitary sewers
d. None of the above
a. A reamer - correct answer ✔✔A pig would be used as ________________in a force
main.
a. A reamer
b. A stopper
c. A Float
d. A tell tale
d. Solids won't build up in a sewer and reduce flow capacity - correct answer ✔✔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
d. A potable water supply connected to a potential
source of pollution. - correct answer ✔✔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.
c. infiltration and inflow - correct answer ✔✔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
1 C questions n answers graded A+
d. 1 gpm (60 gph / 60 min/hr ) - correct answer ✔✔A flow of 60 gph is equal to?
a. 1 mgd
b. 1mg/L
c. 10 gpm
d. 1 gpm
b. The difference in invert elevation over the length
of the pipe - correct answer ✔✔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
c. Prevent backflow of wastewater into a drinking
water supply. - correct answer ✔✔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
c. Potable (Drinkable) water pipe connected to a
supply of questionable origin - correct answer ✔✔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
d. Inflow - correct answer ✔✔Wastewater carried in a collection system may come from
a. Digester supernatant
b. Exfiltration
c. Primary settling tank
d. Inflow
b. Not to cause flooding in homes and businesses - correct answer ✔✔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
c. Pathogenic - correct answer ✔✔Disease producing bacteria are called
a. Saprophytic
b. Facultative
c. Pathogenic
d. Parasitic
b. Storm sewers - correct answer ✔✔A manhole with a center grating is normally used for
a. Venting
b. Storm sewers
c. Sanitary sewers
d. None of the above
a. A reamer - correct answer ✔✔A pig would be used as ________________in a force
main.
a. A reamer
b. A stopper
c. A Float
d. A tell tale
d. Solids won't build up in a sewer and reduce flow capacity - correct answer ✔✔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
d. A potable water supply connected to a potential
source of pollution. - correct answer ✔✔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.
c. infiltration and inflow - correct answer ✔✔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
