5-35.
What is “looming”?
1.
An atmospheric phenomenon that causes
objects over the horizon, which would
otherwise not be seen, to become visible
2.
A phenomenon that causes stars to twinkle
and change color near the horizon
3.
An inferior mirage
4.
A form of iridescence
5-36.
A luminous beam of sunlight passing through a
break in the clouds and extending to the Earth
like a spotlight is known as
1.
iridescence
2.
scintillation
3.
a crepuscular ray
4.
a sunstroke
5-37.
Which of the following atmospheric conditions
is
necessary
for
the
formation
of
thunderstorms?
1.
High temperatures and contrasting air
masses
2.
Conditionally stable air and high humidity
3.
Moist, conditionally unstable air and a
lifting mechanism
4.
A weak horizontal temperature gradient,
low-level turbulence, and high humidity
5-38.
Which of the following statements is NOT true
concerning the makeup of thunderstorms?
1.
In the initial stages of development
updrafts prevail throughout the cell
2.
A cell’s life cycle usually lasts 1 to 3 hours
3.
There are three distinct stages in the life
cycle of a cell
4.
They consists of only one convective cell
5-39.
Which of the following lapse rates would most
likely NOT be found in a thunderstorm?
1.
.45/100 meters
2.
.75/100 meters
3.
7.0/1000 meters
4.
7.5/1000 meters
5-40.
What is considered to be the most hazardous
level for flying in a thunderstorm?
1.
The base
2.
The middle level
3.
The upper level
4.
The freezing level
5-41.
Which of the following statements concerning
the winds associated with thunderstorms is
correct?
1.
Microbursts, macrobursts, and first gusts
occur in all convective cells
2.
Microbursts
are
produced
by
violent
updrafts
3.
The wind speed of the first gust is usually
the highest recorded in a storm
4.
Macrobursts normally last 2 to 3 hours
5-42.
What is the Earth’s normal electrical field?
1.
Ground negative and air positive
2.
Ground positive and air negative
3.
Ground and air both positive
4.
Ground and air both negative
5-43.
Within
a
thunderstorm
cloud,
where
is
lightning most frequently encountered?
1.
Several thousand feet below the freezing
level
2.
At the freezing level
3.
Between the freezing level and 15°F
4.
Between the freezing level and the base of
the cloud
5-44.
Auroras most commonly occur
1.
in thunderstorms
2.
near the Earth’s magnetic poles
3.
when rarefied gases invade the lower
atmosphere
4.
near the equator
5-45.
Which of the following factors distinguishes
airglow from an aurora?
1.
Airglow is fainter
2.
Airglow does not shimmer as much as an
aurora
3.
Airglow appears in middle and lower
altitudes, while auroras are a feature of
high altitudes
4.
Each of the above
5-46.
Which of the following definitions best
describes climate?
1.
The scientific study of the weather of a
region
2.
The sum total of the Earth’s atmospheric
variables
3.
The
average
state
of
the
Earth’s
atmosphere over any given location over a
long period of time
4.
The general weather of a region
28
