Turbulence near the ground due to surface heating will usually be most severe ?
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Which cloud type indicates the presence of significant vertical currents at low levels ?
Select the correct statement from the following ?
What the turbulence caused a wind blowing over rough terrain Mechanical turbulence. 
Mechanical turbulence the result of Friction between air the ground. 
Always suspect turbulence in presence of Friction between air the ground. 
The recommended distance to stay away from a thunderstorm Friction between air the ground. Question 59-8
Indicate speed that descending air currents can reach in a cumulonimbus cloud 2 feet per minute. Question 59-9
The instrument used to measure surface wind speed An anemometer installed on a mast. Question 59-10
Indicate maximum speed that ascending air currents can reach in a cumulonimbus cloud An anemometer installed on a mast. Question 59-11
An aircraft flying in northern hemisphere at low altitude and going directly away from a centre of low pressure what direction relative to aircraft does wind come from An anemometer installed on a mast. Question 59-12
When isobars are close together The wind velocities are stronger. Question 59-13
A 310° wind a wind that comes from The wind velocities are stronger. Question 59-14
A wind of 225° blows The wind velocities are stronger. Question 59-15
The jet stream A high speed air current at altitudes between 6 5 km.
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