Meteo Flashcards
(99 cards)
1
Q
Supercool water
A
-40c
2
Q
Tropopause
A
Not vary altitude, not continue
3
Q
Dewpoint associated with
A
temp and relative humidity
4
Q
Earth
A
Stratosphere
5
Q
Icing condition
A
0 to -5c (ตอบอันที่ร้อนสุด)
6
Q
Thermal depend on
A
เกิดจาก Solar heat
7
Q
Metar
A
Runway visual range
8
Q
บินแบบ cross country เข้า headwind
A
Best lift/drag(L/D), decrease a/s
9
Q
In northern hemisphere airmass move by
A
Colioris
10
Q
Cool, dense air lift warm air
A
Pressure gradient force
11
Q
Approaching Thunderstorm with hail
A
Several mile downwind from under Thunderstorm
12
Q
Northern hemisphere
A
High-clockwise, low-counter clockwise
13
Q
Radiation fog
A
Calm night
14
Q
Observer visibility during landing under IFR called
A
RVR(runway visual range)
15
Q
ISOBAR
A
Equal pressure
16
Q
Equator
A
Temperature higher than polar
17
Q
Temp of tropopause
A
Warm than either side
18
Q
When cool air replace warm
A
Convection
19
Q
8000’ (top cumulus cloud at 8000’ greatest turbulence will expect at)
A
5000’
20
Q
lapse rate 4c/1000’
A
The air is absolute stable
21
Q
Sea level under standard condition
A
1013mb 59F 15c 29.92in.hg.
22
Q
Condition when soaring vicinity Thunderstorm
A
wind shear and turbulence
23
Q
Thunderstorm most hazard aircraft
A
Squall line Thunderstorm
24
Q
fog become stratus cloud
A
heat from industrial area
25
why front hazardous flight
front spoils... ...decrease lift
26
the formation of radiation fog
warm, moist ... flatland ... clear calm night
27
cloud with greatest turbulence
Cumulonimbus
28
a sudden increase wind speed 15 knots/1min
Squall
29
frost
temperature ... adjacent below freezing
30
CAV-OK
when all of these condition exist
31
ice pellet at surface is evidence
a temperature inversion with freezing rain at higher altitude
32
wind shear occur
at any altitude, sudden variation in wind speed or direction
33
cycle of TS, predominately by downdrafts
Dissipating
34
flying across front is a change in
wind direction
35
frost affect a/c t/o
frost may prevent ... airborne ... normal t/o speed
36
cloud associated with warm front
all form of start with rain and fog
37
temp, dew point, spread small, decrease 62F
Fog or low clouds
38
the area of strongest turbulence encountered when departing a jet stream
Below the core on the polar side
39
Convection circulation + seabreeze cause by
Cool dense air moving inland from over the water
40
aircraft structural icing have highest accumulation rate
freezing rain
41
water vapor which air can hold depends on
air temperature
42
Thailand lat 7N 23N ... lies be
Sub tropical ... high pressure, Sub polar ... low pressure
43
sea breeze front most suitable for soaring flight
During the afternoon
44
every process of weather is the result of
heat exchange
45
what cause variation in altimeter between
Unequal heating Earth's surface
46
the development of thermals depends upon
solar heating
47
wind 5000' ... southwesterly ... southerly ...
friction between wind and surface
48
convective circulation pattern ... sea breezes cause by
cool dense air moving inland from over the water
49
proper a/s when flying between thermal - cross country
the best lift/drag speed increased by one half
50
temperature inversion ...
increase in temp as altitude increase
51
type of ground or surface-based inversion ... produced by
terrestrial radiation on a clear still night
52
dew point
the temperature to which air must be cooled to become saturated
53
amount of water vapor ... air can hold depend on
air temperature
54
clouds, fog, or dew - form when
water vapor condense
55
processes, moisture added to unsaturated air
evaporation and sublimation
56
If temp/dew spread small and decrease 62F
fog or low clouds
57
boundary ... two different air mass ...
front
58
one of the most easy recognized discontinuities across a front
a change in temp
59
weather phenomenon ... flying across front ... change
wind direction
60
which period is sea breeze front suit for soaring flight
during the afternoon
61
beneath low-level temp inversion when relative humidity is high
smooth air, poor visibility, fog, haze, or low cloud
62
measurement used to determine stability atmosphere
actual lapse rate
63
decrease stability of an air mass
warming from below
64
characteristic of stable air
stratiform cloud
65
associated with a temperature inversion
a stable layer of air
66
characteristic of moist, unstable air mass
cumuliform cloud and showery precipitation
67
characteristic of unstable air
turbulence and good surface visibility
68
stable air mass is ...
poor surface visibility
69
moist, stable air flowing upslope ... expected to
produce stratus type cloud
70
if unstable air mass is forced upward ... clouds be ...
cloud with considerable vertical development and associate turbulence
71
steady precipitating proceeding a front is indication of
stratiform cloud with little or no turbulence
72
condition for formation cumulonimbus cloud
unstable, moist air
73
cumulus cloud ... surface temp at 1000' 70 dew 48
6000'
74
cumulus cloud ... surface temp ... 82 dew 38
10000'
75
nimbus
rain cloud
76
cloud divided four families
height range
77
cloud greatest turbulence
Cumulonimbus
78
almond lens shape ... 50 knots
lenticular cloud
79
crests of standing mountain waves lens shaped
standing lenticular clouds
80
could type would indicate convective turbulence
Towering cumulus cloud
81
Possible mountain wave turbulence could anticipated when wind of 40 knots or greater below
across mountain ridge, and the air is stable
82
upon encountering severe turbulence ... pilot ... maintain
level flight attitude
83
what feature is associated with cumulus stage ... thunderstorm
Continuous updraft
84
which phenomenon signals beginning of mature stage TS
Precipitation beginning to fall
85
condition necessary for formation TS
high humidity, lifting force, unstable condition
86
during the life cycle of TS, which state predominately by downdraft
Dissipating
87
Thunderstorm reach their greatest intensity during
Mature stage
88
Thunders ... produce the most intense hazard to a/c
squall line thunderstorm
89
non frontal narrow band of active TS often develop ahead of cold front is
squall line
90
If there TS - airport plan to land - hazardous expected
wind-shear turbulence
91
phenomenon always associated with TS
lightning
92
the most hazardous condition when soaring in TS
wind shear and turbulence
93
where wind shear occur
all altitude, all direction
94
when wind shear be expected
in area low-level temp inversion frontal zone and ... clear air turbulence
95
wind speed at 2000'-4000'
25 knots
96
ice pellet at the surface is evidence that ...
temperature inversion with freezing rain at a higher altitude
97
in-flight condition necessary for structural icing to form is
visible moisture
98
aircraft structural icing most ... accumulation rate
freezing rain
99
how far 7.5 mins, gs 114 knots
14.25
