Alabama Wastewater Collection Grade 1 C Exam
2025 Review QUESTIONS AND ALL CORRECT
ANSWERS 100% SOLVED AND GUARANTEED
SUCCESS!!
A flow of 60 gph is equal to?
1 mgd
1mg/L
10 gpm
1 gpm - answer--d. 1 gpm (60 gph / 60 min/hr )
The slope of a sewer is measured by
The difference from the crown to the invert
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
An air gap can be used to
, Clean sewer blockages caused by grease
Let air into manholes
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.
A cross connection is
Cast Iron pipe connected to concrete pipe
Steel pipe connected to asbestos pipe
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
Wastewater carried in a collection system may come from
Digester supernatant
Exfiltration
Primary settling tank
Inflow - answer--d. Inflow
,When using any hydraulic sewer cleaning method, care must be taken by the
operator
To always plug the downstream manhole
Not to cause flooding in homes and businesses
To prevent any sir gap from occurring
To throttle flows from the hydrants by using
the hydrant valve only - answer--b. Not to cause flooding in homes and
businesses
Disease producing bacteria are called
Saprophytic
Facultative
Pathogenic
Parasitic - answer--c. Pathogenic
A manhole with a center grating is normally used for
Venting
Storm sewers
Sanitary sewers
None of the above - answer--b. Storm sewers
, A pig would be used as ________________in a force
main.
A reamer
A stopper
A Float
A tell tale - answer--a. A reamer
A minimum scouring velocity of 2 ft/sec in sewers is
necessary so that
Flow velocities can be estimated between manholes
Roots won't grow in sewers
Sewer pipes won't become eroded on the bottom
Solids won't build up in a sewer and
reduce flow capacity - answer--d. Solids won't build up in a sewer and reduce
flow capacity
A cross connection is best defined as
Ground water entering a gravity sewer through
cracks in the piping
b. A lateral line connected to the main illegally
2025 Review QUESTIONS AND ALL CORRECT
ANSWERS 100% SOLVED AND GUARANTEED
SUCCESS!!
A flow of 60 gph is equal to?
1 mgd
1mg/L
10 gpm
1 gpm - answer--d. 1 gpm (60 gph / 60 min/hr )
The slope of a sewer is measured by
The difference from the crown to the invert
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
An air gap can be used to
, Clean sewer blockages caused by grease
Let air into manholes
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.
A cross connection is
Cast Iron pipe connected to concrete pipe
Steel pipe connected to asbestos pipe
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
Wastewater carried in a collection system may come from
Digester supernatant
Exfiltration
Primary settling tank
Inflow - answer--d. Inflow
,When using any hydraulic sewer cleaning method, care must be taken by the
operator
To always plug the downstream manhole
Not to cause flooding in homes and businesses
To prevent any sir gap from occurring
To throttle flows from the hydrants by using
the hydrant valve only - answer--b. Not to cause flooding in homes and
businesses
Disease producing bacteria are called
Saprophytic
Facultative
Pathogenic
Parasitic - answer--c. Pathogenic
A manhole with a center grating is normally used for
Venting
Storm sewers
Sanitary sewers
None of the above - answer--b. Storm sewers
, A pig would be used as ________________in a force
main.
A reamer
A stopper
A Float
A tell tale - answer--a. A reamer
A minimum scouring velocity of 2 ft/sec in sewers is
necessary so that
Flow velocities can be estimated between manholes
Roots won't grow in sewers
Sewer pipes won't become eroded on the bottom
Solids won't build up in a sewer and
reduce flow capacity - answer--d. Solids won't build up in a sewer and reduce
flow capacity
A cross connection is best defined as
Ground water entering a gravity sewer through
cracks in the piping
b. A lateral line connected to the main illegally
