Atmosphere
International Civil Aviation Organization Standard Atmospheric Conditions
The air is a perfectly dry gas
Mean Sea Level Temperature: +15
Mean Sea Level Pressure of 29.92 inches of Mercury
Standard Laps Rate: 1.98*/1000ft
Advection Fog
Moist Air moves from a warm surface to a cold surface
A Front is
A narrow transition zone between two air masses
Cloud heights in Canadian Aerodrome Forecast (TAF) are given in?
Feet AGL
The definition of Relative Humidity
Amount of Moisture present in the air compared to the amount of moisture the air can hold at that temperature and pressure
Which of the following is not a lifting agent? Evaporation, convection, mechanical turbulence convergence
Evaporation
During the passage of a cold front what happens to the warm airmass infront of it
Warm air is lifted as cold air pushes under it
What altitude does the GFA go up to?
GFA depicts the most probable weather to occur at or below 24,000ft
Failure to adjust an altimeter setting when going from an area of low pressure to one of high pressure will result in altimeter reading......
Too low
Adiabatic cooling causes which type of fog to form?
Upslope fog
When an airmass is being cooled from below what can you expect?
Fog
Poor visibility
Layer cloud
What does WKNG mean?
Weakening
In an airmass with cloud and rain to the ground the surface temperature is 13 degrees so the temperature at 5000ft is?
SALR: 1.5 per 1000ft
5000ft = 5.5*C
During a decent from 2000ft AGL to the surface you will find the wind: Backs? Veers?
Backs and Decreases
The following sequence of clouds is observed at an airport: Cirus, Altostratus, Nimbostratus. The observer should expect the passage of a
The passage of a warm front
What is the IFR outlook?
Provides additional 12 hr of coverage after the GFA valid time. Indicates main areas where IFR weather is expected and the cause of the weather
In the Norther hemisphere the winds blow
Clockwise around a high and counterclockwise around a low
Cloud type associated with heavy rain
Nimbostratus
The conditions required for the formation of thunderstorms are
Unstable air, high humidity, lifting force
What could the term "Virga" imply in a METAR?
Microburst