Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Flight Planning > Fundamentals of Weather > Flashcards

Fundamentals of Weather Flashcards

0
Q

What is the standard temperature for sea level?

A

15°C / 32°F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
1
Q

At what rate does atmospheric pressure decrease with an increase in altitude?

A

Decreases approximately 2” Hg per 1,000 ft

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the standard pressure value for sea level?

A

29.92”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the general characteristics in regards to flow of air around high-pressure systems in northern hemisphere?

A

Air flows inward, upward, and counterclockwise

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the general characteristics in regards to flow of air around low-pressure systems in northern hemisphere?

A

Air flows outward, downward, and clockwise

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What causes the winds aloft to flow parallel to the isobars?

A

Coriolis force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Why do you surface winds generally flow across the isobars at an angle?

A

Surface friction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What happens when temperature and dew point close together?

A

Visible moisture is likely, inform of clouds, dew, or fog

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What factor primarily determines the type and vertical extent of clouds?

A

Stability of the atmosphere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the difference between stable and unstable atmosphere?

A

Stable atmosphere resist any upward or downward displacement.

Unstable atmosphere allows upward or downward displacement to grow into a vertical or convective current.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How do you determine the stability of the atmosphere?

A

When temperature decreases uniformly and rapidly as you climb, you have an indication of unstable air.

If temperature remains unchanged or decreases only slightly with altitude, air is stable.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the main types of icing an aircraft may encounter?

A

Structural, induction system, and instrument icing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are the three types of structural icing?

A

Clear ice, Rime ice, mixed ice

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Define clear ice:

A

Large drops and slowly freezes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Define Rime ice:

A

Small drops and freezes rapidly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Define mix ice:

A

Combination of clear and Rime ice

16
Q

What is induction icing?

A

Carburetor engine ice.

Carb heat 10 to 15 minutes or until landing

17
Q

What is instrument icing?

A

Pitot icing, nav antenna iced

18
Q

What factors must be present for a thunderstorm to form?

A

A source of lift, heating, fast-moving front to lift/upslope.

Unstable air.

High moisture content.

19
Q

What are the stages of a thunderstorm?

A

Cumulus stage: updrafts

Mature stage: first sign of rainfall begins

Dissipating stage: rain themselves out

20
Q

What are squall line thunderstorms?

A

A non-frontal, narrow band of active thunderstorms.

Often develops ahead of cold front and moist, unstable air, but it may develop an unstable air far removed from any front.

21
Q

How far do you circumnavigate a thunderstorm?

A

20 nautical miles around

22
Q

How do you proceed if caught in a thunderstorm?

A

Wings level, maneuver speed

23
Q

State two basic ways that a fog may form:

A

Cooling air it the dew point.

Adding moisture to the air.

24
Q

Name the types of fog:

A

Ice fog

Radiation fog
Advection fog
Precipitation induced fog

Upslope fog

25
Q

What causes radiation fog to form?

A

Clear sky, little/no wind, small dew point spread.

Forms during night/near daybreak.

26
Q

What is advection fog and where is it most likely to form?

A

Moist air over colder ground or water.

Most common along costal areas.
But often develops deep in continental areas.

27
Q

Define upslope fog:

A

Moist, stable air being cool adiabatically as it moves upsloping terrain.

Once upsloping winds cease, fog dissipates.

Rockies, Appalachian Mountains.

28
Q

Define Ice fog:

A

Occurs in cold whether when temperature is much below freezing and water vapor sublimates directly as ice crystals.

Occurs mostly in Arctic regions.

29
Q

What is precipitation induced fog?

A

When relatively warm air/drizzle falls thru cool air, evaporation from precipitation saturates cool air and forms fog.

Most commonly associated with warm fronts but also slow moving cold fronts and stationary fronts.

Industrial pollution also can cause this

30
Q

Other than fog, what are several other examples of IFR weather producers?

A 
Low clouds
Haze
Smoke
Blowing obstructions to vision 
Precipitation 
Fog
31
Q

What is a microburst?

A

Small scale down drafts.

Originate from low/mid layer convective clouds.

Can prove deadly to all planes.

32
Q

What are the characteristics of a microburst?

A

Max life of 15min.
Against Microburst may encounter increased head winds.
In the middle of microburst may encounter strong down drafts.
With microburst may encounter improved performance.

33
Q

Define freezing level:

A

Altitude where snow, frost & ice are likely to drop

Flight Planning (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions