quiz 2

Question 1

Water vapor is ____________

Answer 1

invisible, clear gas

Question 2

_________ determines how much water vapor air can hold

Answer 2

Temp

Question 3

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

Answer 3

Relative Humidity

Question 4

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

Answer 4

Dew point

Question 5

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

Answer 5

Saturated

Question 6

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

Answer 6

sublimation

Question 7

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

Answer 7

Evaporation

Question 8

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

Answer 8

Freezing

Question 9

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

Answer 9

Condensation

Question 10

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

Answer 10

supercooled

Question 11

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

a. _______
b. _______

Answer 11

a. clear night

b. no wind

Question 12

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

Answer 12

3 degree C

Question 13

Clouds give a visible indication of _________

Answer 13

air motion, stability , and moister

Question 14

Clouds are formed by ___________

Answer 14

cooling temps , raise in dew point or both

Question 15

A cloud is composed of ________

Answer 15

minute water or ice particles suspended in air

Question 16

Clouds are valuable to pilots because they

__________________________________

Answer 16

show what air was doing

Question 17

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

Answer 17

Cumulus

Question 18

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

Answer 18

Stratus

Question 19

The prefix nimbo or the suffix nimbus means __________

Answer 19

rain

Question 20

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

Answer 20

False

Question 21

One cloud with extensive vertical development is the ______ ______

Answer 21

towering cumulus

Question 22

The most dangerous cloud by far is the ___________

Answer 22

Cumulonimbus

Question 23

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

Answer 23

Upward

Question 24

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

Answer 24

Rain
Snow
Sleet
Hail

Question 25

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

Answer 25

True

Question 26

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

Answer 26

4,000

Question 27

Aircraft icing occurs _______________

Answer 27

Visible moister and freezing temp

Question 28

Define air mass. _________________

Answer 28

Body of air with uniform temp and moister

Question 29

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

Answer 29

source region

Question 30

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

Answer 30

Front

Question 31

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

Answer 31

Temp

Question 32

___________________, __________________, and __________________ always change across a front

Answer 32

Wind, temp and pressure

Question 33

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

Answer 33

Keep altimeter current

Question 34

The four principal types of fronts are ?

Answer 34

warm cold occluded stationary

Question 35

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

Answer 35

Cumulus

Question 36

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

Answer 36

embedded thunderstorm

Question 37

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

Answer 37

squall line | severe thunderstorm

Question 38

What causes adiabatic cooling of a lifted parcel of air?

Answer 38

expansion of air

Question 39

The temperature lapse rate for unsaturated adiabatic air is ________

Answer 39

3 degree C per 1000 feet

Question 40

A stable atmosphere ___________________ vertical displacement.

Answer 40

hinders

Question 41

An unstable atmosphere ___________________ vertical displacement.

Answer 41

allows

Question 42

Air may be stable or unstable in ________

Answer 42

Layers

Question 43

A positive Lifted Index indicates ____________ air.

Answer 43

stable

Question 44

A negative Lifted Index indicates ____________ air.

Answer 44

unstable

Question 45

Any CAPE value greater than 0 indicates ____________ air

Answer 45

unstable

Question 46

Clouds in stable air develop _________________ and are called ___________

Answer 46

horizontally | stratiform

Question 47

Clouds in unstable air develop ________________ and are called ______

Answer 47

vertically | cumuliform

Question 48

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

Answer 48

T

Question 49

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? ____________________________________.

Answer 49

5,000 feet

Question 50

Turbulence is usually encountered above / below cumulus clouds.

Answer 50

below