Exam (elaborations)
S-290. Unit 6 EXAM QUESTIONS AND ANSWERS
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S-290. Unit 6 EXAM QUESTIONS AND ANSWERS
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S-290.Unit
6
EXAM
QUESTIONS
AND
ANSWERS
6.1:
Describe
the
relationship
among
atmospheric
pressure,
temperature,
density,
and
volume.
-
ANSWER-Pressure
=
density*temperature.
Density
=
Mass/volume
6.2:
Describe
temperature
lapse
rate
and
stability,
and
the
different
lapse
rates
used
to
determine
the
stability
of
the
atmosphere.
-
ANSWER-Dry
adiabatic:
5.5
Wet:
3
Average:
3.5
6.3:
Describe
the
effects
of
atmospheric
stability
on
wildland
fire
behavior.
-
ANSWER-Unstable
air
=
more
active
wildland
fire
behavior
by
increasing:
Likelihood
of
fire
whirls
and
dust
devils
Likelihood
of
gusty
and
erratic
surface
winds
The
height
and
strength
of
convection
and
smoke
columns
Likelihood
of
firebrands
being
lifted
to
great
heights
for
long-range
spotting
Stable
air
=
less
active
wildland
fire
behavior
by:
Limited
rise
of
smoke
columns
Reducing
inflow
of
fresh
air,
limiting
growth
of
wildland
fire
and
their
convective
column.
Lowering
surface
wind
speeds
and
fire
spread
rates
(except
in
mountainous
terrains)
6.4:
Name
4
types
of
temperature
inversions
and
describe
their
influence
on
wildland
fire
behavior,
including
the
thermal
belt.
-
ANSWER-1.
Nighttime
or
radiation
inversion
Thermal
belt
forms
when
a
nighttime
inversion
makes
frequent
contact
wall
or
mountain
slope.
2.
Frontal
inversion
3.
Marine
inversion
4.
Subsidence
inversion
6.5:
Name
and
describe
the
four
lifting
processes
that
can
produce
thunderstorms.
-
ANSWER-Thermal
(convective)
Frontal
lift
Orographic
Jet
stream
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