609
Questions
and
Answers
100%
Pass
The
recovery
process
on
an
R-12
or
R-134a
A/C
System
should
continue
until
a
stable
vacuum
is
held
by
the
system
for:
-
ANSWER-2
minutes
A
recycled
refrigerant
container
has
been
checked
and
found
to
be
above
the
given
pressure
limit
for
the
ambient
temperature
Technician
A
says
that
the
refrigerant
container
should
be
placed
in
a
cooler
storage
area
before
use
Technician
B
says
that
the
vapor
in
the
container
should
be
slowly
vented
into
a
refrigerant
handling
unit
who's
right
-
ANSWER-Technician
B
only
The
ozone
layer
filters
out
most
of
the
suns
harmful:
-
ANSWER-Ultraviolet
radiation
the
reduction
of
ozone
in
the
stratosphere
could
cause:
-
ANSWER-An
increase
of
skin
cancer
and
eye
cataracts
Technician
A
says
that
sunlight
striking
CFC
molecules
can
cause
chlorine
to
be
released
Technician
B
says
that
chlorine
atoms
react
with
ozone
to
produce
chlorine
monoxide
Who's
right
-
ANSWER-Both
A
and
B
R
134a
refrigerant
must
be
reclaimed
to
meet
which
of
these
purity
standards
-
ANSWER-J2099
if
the
required
charge
level
of
refrigerant
for
MVAC
system
is
40
ounces
which
of
these
is
correct
charge
level
measured
in
pounds
-
ANSWER-2.50lb
(1.13)
Technician
A
says
that
recovery/
recycling/
recharging
equipment
for
R-1234yf
refrigerant
requires
integration
with
a
refrigerant
identifier.