USI MODULE 3 PROGRESS CHECK 2026/2027 | PRACTICE QUESTIONS, ANSWERS
& COMPREHENSIVE STUDY GUIDE
Icing can occur anytime the temperature nears _____ and _____ is present. - ANS ✔✔32°F / visible
moisture
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. - ANS ✔✔Lift
What can be produced by a stable air mass? - ANS ✔✔stratus clouds and light mist or drizzle
Weather conditions including temperature, pressure, wind, precipitation, and visibility is provided by
which service - ANS ✔✔Automated Surface Observing Systems (ASOS)
The weather report, ____________ provides surface observations at select airports. - ANS ✔✔METAR
What term defines the temperature at which water vapor in the air must be cooled for condensation to
occur? - ANS ✔✔Dew point
What is an abrupt change in the speed or direction of air flow that creates mechanical turbulence? - ANS
✔✔Wind shear
The lowest layer of clouds described as either ________. make up the cloud ceiling, which is the height
above ground level. - ANS ✔✔broken or overcast
The service, for busy terminal areas, that offers continuous broadcast of recorded aeronautical
information, including weather is ____________________. - ANS ✔✔Automated Terminal Information
Service (ATIS)
Light mist or drizzle is typical of what type of cloud? - ANS ✔✔Stratus
A characteristic of stratus clouds is that they may form in stable air and produce - ANS ✔✔light mist or
drizzle
An unstable air mass is characterized by ______________. - ANS ✔✔turbulence and cumuliform clouds
What is wind shear? - ANS ✔✔change in wind speed or direction of flow, creating mechanical turbulence
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. - ANS ✔✔Decreases
When you need information about wind, visibility, significant weather, and the probability of
precipitation and thunderstorms, what report do you obtain? - ANS ✔✔Terminal Aerodrome Forecast
(TAF)
& COMPREHENSIVE STUDY GUIDE
Icing can occur anytime the temperature nears _____ and _____ is present. - ANS ✔✔32°F / visible
moisture
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. - ANS ✔✔Lift
What can be produced by a stable air mass? - ANS ✔✔stratus clouds and light mist or drizzle
Weather conditions including temperature, pressure, wind, precipitation, and visibility is provided by
which service - ANS ✔✔Automated Surface Observing Systems (ASOS)
The weather report, ____________ provides surface observations at select airports. - ANS ✔✔METAR
What term defines the temperature at which water vapor in the air must be cooled for condensation to
occur? - ANS ✔✔Dew point
What is an abrupt change in the speed or direction of air flow that creates mechanical turbulence? - ANS
✔✔Wind shear
The lowest layer of clouds described as either ________. make up the cloud ceiling, which is the height
above ground level. - ANS ✔✔broken or overcast
The service, for busy terminal areas, that offers continuous broadcast of recorded aeronautical
information, including weather is ____________________. - ANS ✔✔Automated Terminal Information
Service (ATIS)
Light mist or drizzle is typical of what type of cloud? - ANS ✔✔Stratus
A characteristic of stratus clouds is that they may form in stable air and produce - ANS ✔✔light mist or
drizzle
An unstable air mass is characterized by ______________. - ANS ✔✔turbulence and cumuliform clouds
What is wind shear? - ANS ✔✔change in wind speed or direction of flow, creating mechanical turbulence
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. - ANS ✔✔Decreases
When you need information about wind, visibility, significant weather, and the probability of
precipitation and thunderstorms, what report do you obtain? - ANS ✔✔Terminal Aerodrome Forecast
(TAF)
