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USI Module Three
Terms in this set (18)
Icing can occur anytime the temperature nears _____ and _____ is present.
32°F / visible moisture
Cloud Ceiling is defined as _______________.
height, above ground level, of the lowest layer of clouds
Weather conditions including temperature, pressure, wind, precipitation, and visibility is provided by which service?
Automated Surface Observing Systems (ASOS)
Wings and propellers must move through the air faster to generate the same amount of _______ when there is a decrease in air density that reduces unmanned aircraft performance.
Structural icing in flight occurs when ________.
temperature is at the point where moisture striking the aircraft must be 32°F/0°C or colder.
A characteristic of stratus clouds is that they may form in stable air and produce _____________.
light mist or drizzle
What is an abrupt change in the speed or direction of air flow that creates mechanical turbulence?
What happens to air density as temperature increases?
What is wind shear?
change in wind speed or direction of flow, creating mechanical turbulence
The weather report, ____________ provides surface observations at select airports.
Light mist or drizzle is typical of what type of cloud?
A ________ is the dividing line between contrasting air masses.
At select airports, when you need a report that tells future airport conditions for a five mile radius, you look for the ________.
Unmanned aircraft performance ________ as air density decreases and temperature increases. This causes unmanned aircraft wings and propellers to move through the air faster to generate the same amount of lift.
An unstable air mass is characterized by ______________.
turbulence and cumuliform clouds
Wind velocities at 400 feet AGL tend to be __________ winds near the surface.
twice as much as
What term defines the temperature at which water vapor in the air must be cooled for condensation to occur?
The lowest layer of clouds described as either ________.make up the cloud ceiling, which is the height above ground level.
broken or overcast
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