問題一覧
1
1.
Pressure
2
2.
850mb
3
3.
Metars
4
4.what types of char is shown?
surface analysis
5
5.
Jet stream
6
6.
30000’msl
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7.What is the valid time of the above forecast chart in MST?
26 October at 5:00 am MST
8
Which point in the attached chart is located along an upper-level ridge axis?
B
9
Which point in the attached chart is located at the lowest height above MSL?
D
10
Which point is likely experiencing convergence, sinking motion, & increasing surface pressure?
C
11
Which point is likely experiencing divergence, decreasing surface pressure, and rising motion?
A
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Which one has the strongest wind
C
13
Which of the following sources of vertical motion does NOT generally produce precipitation?
wave motions
14
A surface low pressure system will strengthen when___
Divergence aloft exceeds convergence into the low
15
When strong winds blow across a large mountain range, upward motion will generally occur.
along the windward slope
16
What type of weather is generally associated with low pressure?
cloudy skies
17
What causes the wind to converge into surface low pressure systems?
friction
18
when stable air is displaced vertically ____
buoyancy will force it back toward its initial altitude
19
The environmental lapse rate is___
the rate that ambient temperature changes with altitude
20
How would you describe the lapse rate of an inversion layer?
Negative
21
The dry adiabatic lapse rate is the rate that____
the temperature of rising/sinking air changes with altitude
22
If the temperature is 10°C at the surface (0 AGL) and 2 °C at 3,000' AGL, then the air is
stable
23
How does the temperature of air change adiabatically?
by expansion or compression
24
In stable air, flight is__
generally smooth
25
in unstable air, clouds appear
flat on bottom/bumpy on top (cumuliform)
26
Which of the following stabilizes the atmosphere?
sinking (subsidence)
27
Which of the following phase changes of H2O releases latent heat into the air?
condensation
28
Which of the following phase changes of H2O absorbs the most latent heat?
sublimation
29
Which of the following increases exponentially as temperature increases?
saturation vapor pressure
30
The higher the dew point temperature the higher the ____ must be.
Vapor pressure
31
relative humidity and temperate are ____
inversely related to each other
32
The relative humidity is generally highest ___
around dawn
33
If L.A. and Seattle have the same RH but it's warmer in L.A., which has a higher dew point?
LA
34
The higher the water vapor content of the air, the___the aircraft performance
slightly worse
35
how is air brought to saturation
all of the above
36
Which of the following is not a necessary ingredient for cloud formation?
ice nuclei
37
A cloud is composed of ____
liquid and ice particles
38
What kind of fog forms when cool air resides over a warm, moist surface?
mixing or steam fog
39
What kind of fog forms when warm moist air moves over cooler water or land (wind < 15 kt)?
advection fog
40
The majority of cloud particles are supercooled in clouds with temperatures___
between 0 and -15c
41
Supercooled drops freeze when
all of the above
42
What is the LCL when the surface temperature is 10 °C and the dew point is -5 °C?
6000 agl
43
Fallstreaks that don't reach the ground, warning of strong downdrafts and shear are called___
Virga
44
A bumpy cloud with base at 10,000' AGL is called
altocumulus
45
A precipitating layered cloud with a base at 3,500' AGL is called___
nimbostratus
46
A cloud pattern that is bright white in visible imagery yet is hard to see in IR is likely__
a low , thick cloud
47
A cloud that is bright white in both visible and infrared imagery would be__
a high think cloud
48
Which is an advantage of GOES satellites over POES satellites?
fixed location relative to earth
49
A(n)_ radar is blind beyond the first _ echo.
airbone , strong
50
___is a radar product that shows the maximum reflectivity at any elevation angle above.
composite reflectivity
51
If there are no echoes in the base reflectivity, then we are sure no thunderstorms are forming.
False
52
Convective echoes (with strong, turbulent updrafts/downdrafts) are best found by identifying _
strong reflectivity gradients
53
A thunderstorm echo that likely contains large hail and possibly a tornado is called a
hook echo
54
what does Doppler rader detect
particle motion towards/away