W a s t e w a t e r
T r e a t m e n t
O p e r a t o r
C e r t i f i c a t i o n
T e s t
# 3
The
typical
suspended
solids
removal
rate
in
the
primary
clarifier
is
5
to
10%
T rue
or
False
-
ANS
False
(v .1
pg
129)
Over-greasing
a
pump
motor
can
lead
to
damage.
T rue
or
False
-
ANS
T rue
(v .2
pg
404)
A
healthy
digester
gas
consists
mostly
of
hydrogen
sulfide.
T rue
or
False
-
ANS
False
(v .2
pg
158)
Coliform
results
are
reported
as
MPN/100
ml
T rue
or
False
-
ANS
T rue
(v .2
pg
556)
Increased
concentrations
of
volatile
acids
and
decreased
alkalinity
are
signs
that
the
anaerobic
digestion
is
in
an
ideal
state. T rue
or
False
-
ANS
False
(v .2
pg
523)
Breakpoint
chlorination
is
the
addition
of
chlorine
to
wastewater
until
the
chlorine
demand
has
been
met.
T rue
or
False
-
ANS
T rue
(v .1
pg
351)
Zero
calibration
accuracy
for
DO
probes
and
meters
should
be
checked
with
an
absolute
zero
solution
(sodium
sulfite)
T rue
or
False
-
ANS
T rue
T emperature,
pH,
and
dissolved
oxygen
do
not
have
to
be
analyzed
immediately
because
they
can
be
preserved.
T rue
or
False
-
ANS
False
(v .2
pg
499,502)
Sterilization
is
the
goal
of
most
wastewater
treatment
plants
T rue
or
False
-
ANS
False
(v .1
pg
54)
One
of
the
most
common
types
of
packaged
plants
is
extended
aeration T rue
or
False
-
ANS
T rue
(v .1
pg
257)
NPDES
permits
are
issued
by
the
EP A
or
the
state
T rue
or
False
-
ANS
T rue
Hypochlorination
will
raise
the
pH
of
wastewater
being
treated
T rue
or
False
-
ANS
T rue
(v .1
pg
351)
Denitrification
does
not
cause
sludge
to
rise
in
a
secondary
clarifier
T rue
or
False
-
ANS
False
(v .2
pg
73)
The
sludge
digester
can
be
either
aerobic
or
anaerobic
T rue
or
False
-
ANS
T rue
(v .2
pg
148,217
In
order
to
protect
your
family
from
infectious
disease,
you
should
not
wear
your
work
clothes
home.
T rue
or
False
-
ANS
T rue
(v .2
pg
266)
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