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ATSC 231 block 3 questions and answers _ 100% solved.
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ATSC 231 block 3 questions and answers _ 100% solved.
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ATSC231
block
3
questions
and
answers
/
100%
solved
What
is
the
wind
minimum
for
possible
mountain
wave
activity?
-
ANSWER-20
its
at
the
peaks
What
is
the
wind
minimum
for
possible
clear
air
turbulence
in
a
jet
stream?
-
ANSWER-110
kts
What
is
the
wind
minimum
per
1000
ft
for
moderate
turbulence?
-
ANSWER-5-6
kts
increase
or
decrease
What
is
the
wind
minimum
per
1000
ft
for
severe
turbulence?
-
ANSWER-6
its
or
above
What
is
the
wind
minimum
for
moderate
horizontal
wind
shear
across
150
nm?
-
ANSWER-20-40
kts
How
do
downscoping
winds
form?
-
ANSWER-potential
energy
converting
to
kinetic
energy
Where
and
how
do
lee
wind
storms
occur?
-
ANSWER-lee
of
the
mountains
and
the
winds
can
reach
speeds
two
times
the
speed
of
those
at
the
crest
What
is
a
hydraulic
wave?
-
ANSWER-A
steady
disturbance
in
the
lee
of
a
mountain
What
type
of
turbulence
does
a
hydraulic
jump
create?
-
ANSWER-Low
to
moderate
turbulence What
is
a
rotor?
-
ANSWER-turbulent
area
where
wind
rotates
around
an
area
next
to
a
mountain
How
far
can
a
hydraulic
jump
extend
beyond
the
top
of
a
mountain?
-
ANSWER-50-100
miles
What
is
a
trapped
lee
wave?
-
ANSWER-A
rotor
trapped
below
a
low
level
turbulence
zone
What
is
a
vertically
propagating
wave?
-
ANSWER-gravity
wave
which
has
energy
that
propagates
vertically
What
are
the
requirements
for
a
vertically
propagating
wave?
-
ANSWER-Weak
wind
shear
moderately
stable
atmosphere
What
is
the
volume
of
a
vertically
propagating
wave?
-
ANSWER-extends
10s
of
miles
downwind
amplitude
increases
w
height
How
do
you
calculate
if
a
wave
is
a
vertically
propagating
wave
or
a
trapped
lee
wave?
-
ANSWER-Compare
winds
at
the
peak
of
a
mountain
and
6000
ft
above.
If
the
ratio
is
less
than
1.6
it
is
a
vertically
propagating
wave
and
if
its
greater
than
its
a
trapped
lee
wave
What
conditions
are
required
for
a
trapped
lee
wave
to
form?
-
ANSWER-stable
atmosphere
(temp
inversion
near
mountain
top)
strong
vertical
wind
shear
What
is
the
highest
cause
of
part
91
weather
related
accidents?
-
ANSWER-wind
What
is
the
highest
cause
of
part
135
weather
related
accidents?
-
ANSWER-visibility/ceiling
What
is
the
highest
cause
of
part
121
weather
related
accidents?
-
ANSWER-turbulence
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