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Weather 1 > JX103 > Flashcards

JX103 Flashcards

1
Q

What are the four classifications of turbulence?

A

a. Thermal
b. Mechanical
c. Frontal
d. Wind shear

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2
Q

What type of frontal activity is likely to produce the most turbulence?

A

Fast-moving cold front

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3
Q

What type of icing is found in cumuliform clouds and unstable conditions?

A

Clear icing

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4
Q

What type front produces the most significant icing conditions?

A

Occluded front

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5
Q

What are the greatest hazards associated with induction and compressor icing?

A

Reduced airflow and FOD

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6
Q

What conditions are necessary for the formation of aircraft icing?

A

Visible moisture and temperatures between 0° and -20° C

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7
Q

What is the definition of TRACE (icing)?

A

Ice becomes perceptible.
Rate of accumulation slightly greater than sublimation.
De-icing/anti-icing not used unless encountered for extended time.

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8
Q

Define slant range visibility.

A

The distance on final approach at which the runway environment is in sight

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9
Q

What is the minimum sky coverage constituting a ceiling?

A

5/8 (Broken) or a total obscuration

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10
Q

True or false? Advection fog is dissipated by solar heating.

A

False. The fog layer is usually too thick for solar heating to be effective.

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11
Q

If an aircraft encounters an ash cloud in flight, what is the best procedure for the pilot to use to escape the cloud?

A

Execute 180° turn

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12
Q

What are the four levels of turbulence intensity?

A

a. Light
b. Moderate
c. Severe
d. Extreme

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13
Q

What category of turbulence is characterized by large variations in airspeed and abrupt changes in attitude and altitude?

A

Severe turbulence

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14
Q

Turbulence occurring less than ⅓ of the time is described as ______.

A

Occasional

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15
Q

Moderate turbulence can extend as far as ______ miles downwind of a mountain wave.

A

300

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16
Q

What are the three types of wind shear turbulence?

A

Jet stream, gusty winds, temperature inversion

17
Q

What are the two types of engine icing?

A

Compressor and induction icing

18
Q

True or false? Induction icing requires visible moisture and sub-freezing temperatures.

A

False. Induction icing is a result of lower inlet pressures, and can occur in clear air and temperature as high as 10°.

19
Q

True or false? When finding yourself in icing conditions, you can escape by flying into areas of colder temperatures.

A

True. At lower temperatures precipitation is already frozen and aircraft icing is not a hazard.

20
Q

At what intensity of icing is rate of accumulation a problem if encountered for an extended period of time?

A

Light

21
Q

Total visibility over half the horizon circle or greater is ______.

A

Prevailing visibility

22
Q

______ is the distance that be seen directly upward from the ground into a surface-based obscuration

A

Vertical visibility (VV)

23
Q

Which type of fog produces a thicker, more persistent layer?

A

Advection

24
Q

What are the two types of fog?

A

Radiation

Advection

25
Q

What are the conditions required for formation of fog

A

Condensation nuclei
High moisture content
Small temperature/dew point spread
Light surface winds (1/10 KT)

26
Q

What happens when warm moist air moves over cool surface.

A

Advection fog

27
Q

How can you recognize and avoid icing condition?

A 
Signs of icing conditions:
Visible moisture
0° to -20° C
At low altitude or mountainous terrain
Avoidance:
Climb
Descend
28
Q

What are the three types of anti-ice/de-ice equipment?

A

Fluid
Mechanical
Heat

29
Q

What are the three PIREP icing types?

A

clear, rime and mixed

30
Q

What are the icing intensities?

A

TRACE
LIGHT
MODERATE
SEVERE

31
Q

How is the Prevailing Visibility defined?

A

Greatest horizontal visibility:
Equaled or exceeded throughout over half horizon circle.
Measured in statute miles.
Need not be continuous.

32
Q

Name the sky covers and how many eights of the sky covered they represent.

A 
CLR - 0/8
FEW - 1-2/8
SCT - 3-4/8
BKN - 5-7/8
OVC - 8/8

Weather 1 (5 decks)

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