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Question 20-1 : Wind speed ? [ Admission english ]

Increases with altitude


Question 20-2 : At night as a valley cools down the air becomes denser and flows downward and is referred to as ?

Katabatic winds

exemple 24 Katabatic winds.

Question 20-3 : A cumulonimbus cloud creates a risk of ?

Windshear

exemple 28 Windshear.

Question 20-4 : When isobars on a weather map are close together the wind is most likely to be ?

Strong

exemple 32 Strong.

Question 20-5 : The following sequence of clouds 'cirrus cirrostratus altostratus and nimbostratus' is typically associated to a ?

Warm front

exemple 36 Warm front.

Question 20-6 : Thermal turbulence is caused by ?

Surface heating convection

exemple 40 Surface heating (convection).

Question 20-7 : Mechanical turbulence is the result of ?

Friction between the air and the ground

exemple 44 Friction between the air and the ground.

Question 20-8 : The turbulence caused by a wind blowing over rough terrain is the ?

Mechanical turbulence

exemple 48 Mechanical turbulence.

Question 20-9 : The turbulence caused by a wind blowing perpendicular to a mountain is the ?

Orographic turbulence

exemple 52 Orographic turbulence.

Question 20-10 : Thermal turbulence depends on .1 environment.2 the soil contrasts.3 the degree of air instability.4 the pilot's skill.the combination that regroups all of the correct statements is ?

1 2 3

exemple 56 1 - 2 - 3.

Question 20-11 : Steam fog occurs when ?

Very cold air passing over a warm water surface


Question 20-12 : Wind shear is a dangerous phenomenon that is characterized by ?

A wind velocity variation / wind direction variation over a short distance


Question 20-13 : Cumulonimbus cb is a cloud that generates vertical currents ?

Ascending and descending


Question 20-14 : The cumulonimbus is the most dangerous cloud it can be easily recognized since ?

It has a very large vertical extension with a top that can exceed 35000 ft

exemple 72 It has a very large vertical extension, with a top that can exceed 35000 ft.

Question 20-15 : Ground frost may be formed by ?

Night time evaporation

exemple 76 Night-time evaporation.


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