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Question 61-1 : Mechanical turbulence is the result of ? [ Formation weather ]

Friction between the air and the ground

Question 61-2 : The turbulence caused by a wind blowing over rough terrain is the ?

Mechanical turbulence.

Question 61-3 : The turbulence caused by a wind blowing perpendicular to a mountain is the ?

Orographic turbulence.

Question 61-4 : 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 73: 1 2 3
2 - 3 - 4. 3 - 4. 1 - 2.

Question 61-5 : Steam fog occurs when ?

Very cold air passing over a warm water surface.

exemple 77: Very cold air passing over a warm water surface
Very warm air passing over a cold water surface. there is pollution. the wind is blowing strongly.

Question 61-6 : Wind shear is a dangerous phenomenon that is characterized by ?

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

exemple 81: A wind velocity variation wind direction variation over a short distance
Rotors linked to a wave. a moderate to strong turbulence. prolonged periods of heavy rain.

Question 61-7 : Cumulonimbus cb is a cloud that generates vertical currents ?

Ascending and descending.

exemple 85: Ascending and descending
Of low intensity. only descendants. only ascending.

Question 61-8 : 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 89: It has a very large vertical extension with a top that can exceed 35000 ft
Its base lies on the ground. the wind is zero under its base. the cloud base is at about 2000 ft and its top is at 10000 ft.

Question 61-9 : Ground frost may be formed by ?

Night time evaporation.

exemple 93: Night time evaporation
Day-time fusion. intensification. sublimation.

Question 61-10 : The characteristic cloud of an unstable atmosphere is ?

Cumulonimbus.

exemple 97: Cumulonimbus
Stratus. cirrus. cirrostratus.

Question 61-11 : What is a characteristic phenomenon for a stable atmosphere ?

Stratified clouds.

exemple 101: Stratified clouds
Weak wind. many vertical currents. no precipitation.

Question 61-12 : The name of the phenomenon that describes very large variations in wind speed which can sometimes be caused by a line of thunderstorms is ?

Squall.

exemple 105: Squall
Instability. gust. windy.

Question 61-13 : The cumulus stage of a thunderstorm is normally marked by the ?

Onset of updrafts.

exemple 109: Onset of updrafts
Onset of precipitation. the presence of roll clouds. movement of the thunderstorm cell.

Question 61-14 : Which of the following items will not affect air stability ?

Dew point.

Question 61-15 : Which of the following is not a service provided by nav canada ?

Sat comm.

exemple 117: Sat comm
Atis. notam. awws.



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