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FAA 107 Main Exam | Questions Solved 100% Correct Already Passed
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FAA 107 Main Exam | Questions Solved 100%Correct Already Passed
Microburst - ANSWER Associated w/ convective precipitation
1 mile horizontally , 1000ft veritically 15minutes
difficult to detect
Stability of atmosphere correlates with? - ANSWER its ability to resist vertical motion. A
stable atmosphere makes vertical movement of air difficult. An unstable atmosphere allows
an upward or downward disturbance to grow into a vertical (or convective) current.
Adiabatic heating / Cooling - ANSWER temperature change, which takes place in all upward and
downward moving air
Adiabitic cooling average rate of change - ANSWER 2 degrees C / 1000ft
Conditions of most stable air? - ANSWER Cool Dry Air, Stratiform Clouds present
Temperature Inversion - ANSWER Temp of Air rises w/ Altitude,
For every 20F increase in temp? The air can hold how much humididity? - ANSWER double
Sublimation - ANSWER Direct change of ice to water vapor.
,Relative Humidity - ANSWER Relative humidity is the actual amount of moisture in the air
compared to the total amount of moisture the air could hold at that temperature. For example,
if the current relative humidity is 65 percent, the air is holding 65 percent of the total amount
of moisture that it is capable of holding at that temperature and pressure
Temperature / Dew Point Relationship - ANSWER The dew point, given in degrees, is the
temperature at which the air can hold no more moisture. As moist, unstable air rises,
clouds often form at the altitude where temperature and dew point reach the same value.
At this point, the air is completely saturated, and moisture begins to condense out of the
air in the form of fog, dew, frost, clouds, rain, hail, or snow.
Calculate Cloud Base - ANSWER Surface Temp - Dew Point = Spread/4.4 * 1000
Continental polar air mass - ANSWER forms over a polar region and brings cool, dry air with it.
Maritime tropical - ANSWER forms over warm tropical waters and brings warm, moist air
with it.
Air Mass passing over Warm Surface - ANSWER Convective Currents form
Good Visibility
unstable air
Air Mass passing over Cold Surface - ANSWER No Convective Currents Form
Poor Visibility
Stable Air
Warm Front Characteristics - ANSWER Moves forward and replaces cold air, warm air rises,
temperature drops / condensation occurs. high humidity. Moves slowly 10-25mph
,Cold Front Characteristics - ANSWER A cold front happens when a cold, dense, mass of stable
air advances and replaces a body of warmer air. Cold fronts move twice as fast as warm
fronts, usually progressing at a rate of 25 to 30 mph. However, extreme cold fronts have been
recorded moving at speeds of up to 60 mph.
Thunderstroms form when? - ANSWER Sufficient Water Vapor
Unstable Laps Rate
Initial Upward Boost (heat)
Thunderstorm Stage 1 - ANSWER Cumulus Stage - lifiting action of air begins - 15 Minutes
Thunderstorm Stage 2 - ANSWER Mature Stage -Rain, down rushing air, increases winds temp
decreases
Thunderstrom Stage 3 - ANSWER Dissipating Stage - Anvil Shape, Downdraft spreads and
replaces updraft
Thunderstorm operations - ANSWER Rule of Thumb 20 Nautical Miles
Define Fog - ANSWER Cloud begins 50ft above surface
Radiation Fog - ANSWER Low Lying Areas (Mountain Valley)
Ground cools due to terrestrial radiation
Forms clear nights, no wind. burns off with Sun
Advection Fog - ANSWER Coastal Areas - Sea breezes
Warm Air moves over cold surface, wind is required, can persist for days. Wind less than
15 knots
, Upslope fog - ANSWER moist, stable air is forced up sloping land features like a mountain range.
Does not burn off w/ Sun, can persist for days
Steam fog - ANSWER Forms over bodies of water during cold times. Cold dry air moves
over warm water. icing can occur
Ice Fog - ANSWER Temp below freezing water vapor forms ice crystals
Distance from Clouds Vertically - ANSWER 500ft Ceiling
Distance from Clouds Horizontally - ANSWER 2000ft
Minimum Flight Visiblity - ANSWER 3 Statute Miles
The briefing indicates you can expect a low-level temperature inversion with high relative
humidity. What weather conditions would you expect? - ANSWER Smooth air, poor
visibility, fog, haze, or low clouds.
Moisture is added to air by - ANSWER evaporation and sublimation.
Which combination of atmospheric conditions will reduce aircraft takeoff and climb
performance? - ANSWER High temperature, high relative humidity, and high density altitude.
Which factor would likely increase density altitude? - ANSWER An increase in
ambient temperature.
What conditions are necessary for a thunderstorm to form? - ANSWER High humidity,
lifting force, and unstable conditions
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