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Aviation weather quiz 2 > quiz 2 > Flashcards

quiz 2 Flashcards

100

1
Q

Water vapor is ____________

A

invisible, clear gas

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2
Q

_________ determines how much water vapor air can hold

A

Temp

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3
Q

________ _________ is the ratio of the actual water content to the maximum
possible water content at that temperature.

A

Relative Humidity

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4
Q

The temperature to which air must be cooled to become saturated by the water vapor already present in
the air is ____ _____.

A

Dew point

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5
Q

Air that can hold no more water vapor is considered to be ______

A

Saturated

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6
Q

The change of state of water from a solid to a gas is _____

A

sublimation

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7
Q

The change of state of water from a liquid to a gas is _______

A

Evaporation

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8
Q

The change of state of water from a liquid to a solid is ______

A

Freezing

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9
Q

The change of state of water from a gas to a liquid is ____

A

Condensation

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10
Q

If water remains in its liquid state at temperatures below freezing, it is said to be ____

A

supercooled

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11
Q

What two conditions are required for dew or frost to form?

a. _______
b. _______

A

a. clear night

b. no wind

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12
Q

If the temperature-dew point spread is __________ you can expect fog to form.

A

3 degree C

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13
Q

Clouds give a visible indication of _________

A

air motion, stability , and moister

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14
Q

Clouds are formed by ___________

A

cooling temps , raise in dew point or both

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15
Q

A cloud is composed of ________

A

minute water or ice particles suspended in air

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16
Q

Clouds are valuable to pilots because they

__________________________________

A

show what air was doing

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17
Q

Clouds formed by vertical currents in unstable air are ___________________, meaning accumulation or
heap.

A

Cumulus

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18
Q

Clouds formed by the cooling of a stable layer are ___________________, meaning stratified or layered

A

Stratus

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19
Q

The prefix nimbo or the suffix nimbus means __________

A

rain

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20
Q

True / False: Low clouds are almost entirely water, and this water can never be super-cooled.

A

False

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21
Q

One cloud with extensive vertical development is the ______ ______

A

towering cumulus

22
Q

The most dangerous cloud by far is the ___________

A

Cumulonimbus

23
Q

When flying near cumulonimbus clouds, always fly on the upwind / downwind side.

A

Upward

24
Q

Precipitation is an all-inclusive term. Name 4 of them.

A

Rain
Snow
Sleet
Hail

25
Q

True / False: Precipitation can change state while falling to the earth.

A

True

26
Q

If an airport is reporting precipitation, expect clouds to be more than ____________ feet thick.

A

4,000

27
Q

Aircraft icing occurs _______________

A

Visible moister and freezing temp

28
Q

Define air mass. _________________

A

Body of air with uniform temp and moister

29
Q

The area over which the air mass acquires its identifying characteristics is known as its
_____________________ _____________________.

A

source region

30
Q

The zone between two different air masses is known as a ____________

A

Front

31
Q

____________________ is one of the most easily recognized discontinuities across a front.

A

Temp

32
Q

___________________, __________________, and __________________ always change across a
front

A

Wind, temp and pressure

33
Q

What is the most important thing to remember when flying in the vicinity of a front?

A

Keep altimeter current

34
Q

The four principal types of fronts are ?

A

warm
cold
occluded
stationary

35
Q

If the warm air being lifted ahead of a cold front is unstable, ______________________ clouds develop.

A

Cumulus

36
Q

What can be the most dangerous characteristic of a warm front?

A

embedded thunderstorm

37
Q

Normally found associated with a cold front, a __________ precedes
frontal passage and can contain __________

A

squall line

severe thunderstorm

38
Q

What causes adiabatic cooling of a lifted parcel of air?

A

expansion of air

39
Q

The temperature lapse rate for unsaturated adiabatic air is ________

A

3 degree C per 1000 feet

40
Q

A stable atmosphere ___________________ vertical displacement.

A

hinders

41
Q

An unstable atmosphere ___________________ vertical displacement.

A

allows

42
Q

Air may be stable or unstable in ________

A

Layers

43
Q

A positive Lifted Index indicates ____________ air.

A

stable

44
Q

A negative Lifted Index indicates ____________ air.

A

unstable

45
Q

Any CAPE value greater than 0 indicates ____________ air

A

unstable

46
Q

Clouds in stable air develop _________________ and are called ___________

A

horizontally

stratiform

47
Q

Clouds in unstable air develop ________________ and are called ______

A

vertically

cumuliform

48
Q

T / F Thunderstorms may be embedded in stratiform cloud formations.

A

T

49
Q

While watching the noon news, the forecaster states that the temperature is 95oF and the dew point is
73oF and that the sky is mostly cloudy. At what altitude would we see the bases of these clouds?
____________________________________.

A

5,000 feet

50
Q

Turbulence is usually encountered above / below cumulus clouds.

A

below

Aviation weather quiz 2 (1 decks)

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