Alabama Wastewater Collection Grade 1 C Exam Questions With Verified Solutions
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Module
Wastewater
Institution
Wastewater
Alabama Wastewater Collection Grade 1 C Exam Questions With Verified Solutions
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...
Alabama
Wastewater
Collection
Grade
1
C
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
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
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
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
b.
Oils
in
wastewater
c.
Fungi
d.
Acids
in
water
-
ANS
d.
Acids
in
water
In
a
collection
system,
wastewater
that
contains
no
"free"
of
dissolved
oxygen
is
referred
to
as
a.
Aerobic b.
Anaerobic
c.
Ambient
d.
Debris
-
ANS
b.
Anaerobic
The
primary
reason
why
it
is
important
not
to
have
cross-connections
of
sewers
with
water
supplies
systems
is
a.
Possible
overloading
of
water
systems
b.
Possible
loss
of
drinking
water
pressure
c.
Possible
drinking
water
contamination
d.
Low
of
wastewater
from
the
sewerage
system
-
ANS
c.
Possible
drinking
water
contamination
A
pig
would
likely
be
used
for
cleaning
of
a
a.
Gravity
sewer
b.
Storm
sewer
c.
Force
main
d.
House
or
building
sewer
-
ANS
c.
Force
main
Flow
rates
can
be
expressed
in
which
of
the
following
units
a.
in³
b.
gal/lb
c.
mgd
d.
Lb/mil
-
ANS
c.
mgd
A
sewer
manhole
is
a.
The
lowest
point
in
the
channel
b.
a
gate
that
opens
or
closes
swinging
around
a
set
of
hinges
c.
An
opening
in
a
sewer
provided
for
the
purpose
of
access
d.
A
small
hole
in
a
sewer
where
a
wastewater
service
line
connects
-
ANS
c.
An
opening
in
a
sewer
provided
for
the
purpose
of
access
The
crown
of
a
sewer
pipe
is
the
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