5 METEO. EXAM. PREP.

Question 1 of 25

1

110 Fog produced by frontal activity is a result of saturation due to

Select one of the following:

O evaporation of precipitation.
O nocturnal cooling
O adiabatic cooling.
O advection of moist air

Explanation

Question 2 of 25

1

111 Which in-flight hazard is most commonly associated with warm fronts?

Select one of the following:

O Precipitation-induced fog.
O Advection fog.
O Radiation fog.
O Steam fog

Explanation

Question 3 of 25

1

112 In which environment is aircraft structural ice most likely to have the highest accumulation rate?

Select one of the following:

O Freezing rain.
O Cumulus clouds with below freezing tempera¬tures.
O Freezing drizzle.
O None of the those

Explanation

Question 4 of 25

1

113 In what ways do advection fog, radiation fog, and steam fog differ in their formation or location?

Select one of the following:

O Radiation fog is restricted to land areas; advection fog is most common along coastal areas; steam fog forms over a water surface.
O Advection fog deepens as windspeed increases up to 20 knots; steam fog requires calm or very light wind; radiation fog forms when the ground or water cools the air by radiation.
O Steam fog forms from moist air moving over a colder surface; advection fog requires cold air over a warmer surface; radiation fog is produced by radiational cooling of the ground.
O None of the those

Explanation

Question 5 of 25

1

114 . Which conditions are favorable for the formation of a surface based temperature inversion?

Select one of the following:

O Clear, cool nights with calm or light wind,
O Area of unstable air rapidly transferring heat from the
surface.
O Broad areas of cumulus clouds with smooth, level
bases at the same altitude
O Advection of warm moist air

Explanation

Question 6 of 25

1

115 . What are the characteristics of stable air?

Select one of the following:

O Poor visibility; steady precipitation; stratus clouds.
O Good visibility; steady precipitation; stratus clouds.
O Poor visibility; intermittent precipitation; cumulus clouds.
O Good visibility, turbulence, cumulus clouds

Explanation

Question 7 of 25

1

116 . Which would decrease the stability of an air mass?

Select one of the following:

O Warming from below.
O Cooling from below.
O Decrease in water vapor.
O None of those

Explanation

Question 8 of 25

1

117 . What is a characteristic of stable air?

Select one of the following:

O Stratiform clouds.
O Fair weather cumulus clouds.
O Temperature decreases rapidly with altitude
O Cirrus clouds

Explanation

Question 9 of 25

1

118 . What type weather can one expect from moist, unstable air, and very warm surface temperature?

Select one of the following:

O Strong updrafts and cumulonimbus clouds.
O Fog and low stratus clouds.
O Continuous heavy precipitation
O Fair weather and cirrus clouds

Explanation

Question 10 of 25

1

119 . A moist, unstable air mass is characterized by

Select one of the following:

O cumuliform clouds and showery precipitation
O poor visibility and smooth air.
O stratiform clouds and continuous precipitation
O good visibility and stratiform clouds

Explanation

Question 11 of 25

1

120 . If clouds form as a result of very stable, moist air being forced to ascend a mountain slope, the clouds will be

Select one of the following:

O stratus type with little vertical development and little
or no turbulence.
O cirrus type with no vertical development or
turbulence
O cumulus type with considerable vertical development
and turbulence.
O rotor type

Explanation

Question 12 of 25

1

121 The formation of either predominantly stratiform or predominantly curnuliform clouds is dependent upon the

Select one of the following:

O stability of the air being lifted.
O source of lift
O temperature of the air being lifted.
O the difference between surface temperature and due point

Explanation

Question 13 of 25

1

122 . When an air mass is stable, which of these conditions are most likely to exist?

Select one of the following:

O Smoke, dust, haze, etc., concentrated at the lower
levels with resulting poor visibility.
O Numerous towering cumulus and cumulonimbus
clouds
O Moderate to severe turbulence at the lower levels.
O Updrafts and showery precipitation

Explanation

Question 14 of 25

1

123 . From which measurement of the atmosphere can stability be determined?

Select one of the following:

O The ambient lapse rate.
O Atmospheric pressure
O The dry adiabatic lapse rate.
O The wet ( saturated) adiabatic lapse rate

Explanation

Question 15 of 25

1

124 [Fig.16] What lifts advection fog into low stratus clouds?

Select one of the following:

O Surface winds of approximately 15 knots or stronger.
O Nighttime cooling.
O Dryness of the underlying land mass.
O Updraft

Explanation

Question 16 of 25

1

125 Which would increase the stability of an air mass?

Select one of the following:

O Cooling from below.
O Warming from below.
O Decrease in water vapor.
O Increase in water vapor

Explanation

Question 17 of 25

1

126 The conditions necessary for the formation of stratiform clouds are a lifting action and

Select one of the following:

O stable, moist air.
O unstable, dry air.
O unstable, moist air.
O stable dry air

Explanation

Question 18 of 25

1

127 What feature is normally associated with the cumulus stage of a thunderstorm?

Select one of the following:

O Continuous updraft.
O Roll cloud
O Beginning of rain at the surface.
O Anvil top

Explanation

Question 19 of 25

1

128 . The conditions necessary for the formation of cumulonimbus clouds are a lifting action and

Select one of the following:

O unstable, moist air.
O unstable, dry air.
O stable, moist air.
O stable dry air

Explanation

Question 20 of 25

1

129 . The most severe weather conditions, such as destructive winds, heavy hail, and tornadoes, are generally associated with

Select one of the following:

O squall lines.
O slow-moving warm fronts which slope above the tropopause.
O fast-moving occluded fronts.
O warm sector

Explanation

Question 21 of 25

1

130 Which statement is true concerning squall lines?

Select one of the following:

O They offer the most intense weather hazards to aircraft.
O They form slowly, but move rapidly.
O They are associated with frontal systems only.
O None of the those

Explanation

Question 22 of 25

1

131 Select the true statement pertaining to the life cycle of a thunderstorm.

Select one of the following:

O The beginning of rain at the Earth's surface indicates the mature stage of the thunderstorm
O Updrafts continue to develop throughout the dissipating stage of a thunderstorm
O The beginning of rain at the Earth's surface indicates the dissipating stage of the thunderstorm
O Updrafts develop only throughout the cumulus stage

Explanation

Question 23 of 25

1

132 . Which weather phenomenon signals the beginning of the mature stage of a thunderstorm?

Select one of the following:

O The start of rain.
O The appearance of an anvil top.
O Growth rate of cloud is maximum
O Develop of updraft

Explanation

Question 24 of 25

1

133 During the life cycle of a thunderstorm, which stage is characterized predominately by downdrafts?

Select one of the following:

O Dissipating.
O Mature.
O Developing.
O All stages

Explanation

Question 25 of 25

1

134 Refer on the Significant Weather Chart in Fig.14.
The SIGMET of the same day warns:

WSIY31 LIIB 230437
LIMM SIGMET 02 VALID 230500/230700 LIMM-
MILANO FIR EMBD TS FCST ALPINE AREA AND PO VALLEY AT THE
BORDER WITH ALPS MAINLY CENTRAL PART MOV E NC
SEV ICE FCST BTN FL100 AND FL190 MAINLY CENTRAL ALPS AND PREALPINE
AREA MOV SE NC=
For the area of:

Select one of the following:

O Italy
O Turkey
O UK
O Scandinavia

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