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WorksheetsPart 107 Weather
Total questions: 68
Worksheet time: 2hrs 16mins
Which of the following considerations is most relevant to a remote PIC when evaluating unmanned aircraft performance?
Current weather conditions.
The number of available ground crew.
The type of sUAS operation.
Every physical process of weather is accompanied by, or is the result of, a
movement of air.
pressure differential.
heat exchange.
What causes variations in altimeter settings between weather reporting points?
Unequal heating of the Earth's surface.
Variation of terrain elevation.
Coriolis force.
The development of thermals depends upon
a counterclockwise circulation of air.
temperature inversions.
solar heating.
(Refer to Figure 20.) Over which area should a emote pilot expect to find the highest amount of thermal currents under normal conditions?
2.
7.
5.
Clouds, fog, or dew will always form when
water vapor condenses.
water vapor is present.
relative humidity reaches 100 percent.
While operating around buildings, the remote PIC should be aware of the creation of wind gusts that
change rapidly in direction and speed causing turbulence.
enhance stability and imagery.
increase performance of the aircraft.
A strong steady wind exists out of the north. You need to photograph an area to the south of your location. You are located in an open field with no obstructions. Which of the following is not a concern during this operation?
Strong wind conditions may consume more battery power at a faster rate than in calm conditions.
Turbulent conditions will likely be a significant factor during the operation.
Strong wind may exceed the performance of the sUAS making it impossible to recover.
WInd shear can exist
at all altitudes.
at low altitudes.
at high altitudes.
One of the most easily recognized discontinuities across a front is
a change in temperature.
an increase in cloud coverage.
an increase in relative humidity.
One weather phenomenon which will always occur when flying across a front is a change in the
wind direction.
type of precipitation.
stability of the air mass.
Which type of weather phenomenon that may concern a remote pilot is common among cold fronts?
Long-term periods of reduced visibility.
Long periods of steady precipitation.
Thunderstorms and heavy rain.
What weather provides the best flying conditions?
Warm, moist air.
Cool, dry air.
Turbulence.
The zone between different temperature, humidity, and wind is called
a front.
An air mass.
Wind shear.
A stable air mass is most likely to have which characteristic?
Showery precipitation.
Turbulent air.
Poor surface visibility.
What are the characteristics of a moist, unstable air mass?
Turbulence and showery precipitation.
Poor visibility and smooth air.
Haze and smoke.
What are the characteristics of stable air?
Good visibility and steady precipitation.
Poor visibility and steady precipitation.
Poor visibility and intermittent precipitation.
What measurement can be used to determine the stability of the atmosphere?
Atmospheric pressure.
Actual lapse rate.
Surface temperature.
What would decrease the stability of an air mass?
Warming from below.
Cooling from below.
Decrease in water vapor.
Upon your preflight evaluation of weather, the forecasts you reference state there is an unstable air mass approaching your location. Which would not be a concern for your impending operation.
Thunderstorms.
Stratiform clouds.
Turbulent conditions.
You have received an outlook briefing from flight service through 1800wxbrief.com. The briefing indicates you can expect a low-level temperature inversion with high relative humidity. What weather conditions would you expect?
Smooth air, poor visibility, fog, haze, or low clouds.
Light wind shear, poor visibility, haze and light rain.
Turbulent air, poor visibility, fog, low stratus type clouds, and showery precipitation.
What minimum visibility is required for sUAS operations?
1 miles.
3 miles.
4 miles.
The minimum distance from clouds required for sUAS Part 107 operations is
clear of clouds.
500 feet below, 2,000 feet horizontally.
500 feet above, 2,000 feet horizontally.
(Refer to Figure 69) You are inspecting the lighted towers approximately 8 NM SW of the Corpus Christi Intl Airport (CRP). What is the lowest cloud cover that will enable you to inspect the top of the tower?
1,104 feet MSL.
1,604 feet MSL.
1,054 feet MSL.
The weather report lists the ceiling at 800 feet. What is the highest you can operate your sUAS?
200 feet AGL.
800 feet AGL.
300 feet AGL.
(Refer to Figure 23.) What are the VFR minimum visibility requirements over Plantation Airport?
1 SM.
5 SM.
3 SM.
(Refer to Figure 23.) What is the required flight visibility for a remote pilot operating an unmanned aircraft near the Plantation Airport (JYL)?
5 statute miles.
1 statute mile.
3 statute miles.
(Refer to FIgure 78.) What is the minimum base of the cloud layer to fly to the top of the towers 4 NM east of Onawa (K36)?
792 feet AGL.
292 feet AGL.
1,335 feet MSL.
What feature is normally associated with the cumulus stage of a thunderstorm?
Roll cloud.
Continuous updraft.
Frequent lightning.
Which weather phenomenon signals the beginning of the mature stage of a thunderstorm?
The appearance of an anvil top.
Precipitation beginning to fall.
Maximum growth rate of the clouds.
What conditions are necessary for the formation of thunderstorms?
High humidity, lifting force, and unstable conditions.
High humidity, high temperature, and cumulus clouds.
lifting force, moist air, and extensive cloud cover.
During the life cycle of a thunderstorm, which stage is characterized predominately by downdrafts?
Cumulus.
Dissipating
Mature.
Thunderstorms reach their greatest intensity during the
mature stage.
downdraft stage.
cumulus stage.
Thunderstorms which generally produce the most intense hazard to aircraft are
squall line thunderstorms.
steady-state thunderstorms.
warm front thunderstorms.
A nonfrontal, narrow band of active thunderstorms that often develop ahead of a cold front is known as a
prefrontal system.
squall line.
dry line.
If there is thunderstorm activity in the vicinity of an airport at which you plan to land, which hazardous atmospheric pressure phenomenon might be expected during recovery/landing of the sUAS?
Precipitation static.
Wind-shear turbulence.
Steady rain.
Which weather phenomenon is always associated with a thunderstorm?
Lightning.
Heavy rain.
Hail.
Which is considered to be the most hazardous condition when flying an sUAS inn the vicinity of thunderstorms?
Static electricity.
Lightning.
Wind shear and turbulence.
What is the expected duration of an individual microburst?
Two minutes with maximum winds lasting approximately 1 minute.
One microburst may continue for as long as 2 to 4 hours.
Seldom longer than 15 minutes from the time the burst strikes the ground until dissipation.
In what stage are thunderstorms the strongest?
Mature.
Dissipating.
Cumulus.
Where are squalls most likely to form?
High altitude.
Low altitude.
At any altitude.
The presence of ice pellets at the surface is evidence that there
are thunderstorms in the area.
has been cold frontal passage.
is a temperature inversion with freezing rain at a higher altitude.
One in-flight condition necessary for structural icing to form is
small temperature/dewpoint spread.
stratiform clouds.
visible moisture.
In which environment is aircraft structural ice most likely to have the highest accumulation rate?
Cumulus clouds with below freezing temperatures.
Freezing drizzle.
Freezing rain.
What environment is most conducive to frost formation?
Dewpoint of surface is below freezing, dewpoint is above freezing.
Surface temperature is below freezing, air temperature is below freezing.
Surface temperature is above freezing, air temperature is below freezing.
What situation is most conducive to the formation of radiation fog?
Warm, moist air over low, flatland areas on clear, calm nights.
Moist tropical air moving over cold, offshore water.
The movement of cold air over much warmer water.
In which situation is advection fog most likely to form?
A warm, moist air mass on the windward side of mountains.
An air mass moving inland from the coast in winter.
A light breeze blowing colder air out to sea.
An air mass moving inland from the coast in winter is likely to result in
rain.
fog.
frost.
What types of fog depend upon wind in order to exist?
Radiation fog and ice fog.
Steam fog and ground fog.
Advection fog and upslope fog.
Low-level turbulence can occur and icing can become hazardous in which type of fog?
Rain-induced fog.
Upslope fog.
Steam fog.
What is the best way for a remote pilot to determine the likelihood of local fog formation?
Monitor the temperature/dew point spread.
Monitor the wind conditions to ensure the wind speed is not increasing.
Monitor the barometric pressure to ensure that it is not decreasing.
How would high density altitude affect the performance of a small unmanned aircraft?
No change in performance.
Increased performance.
Decreased performance.
If the outside air temperature (OAT) at a given altitude is warmer than standard, the density altitude
equal to pressure altitude.
lower than pressure altitude.
higher than pressure altitude.
What are the standard temperature and pressure values for sea level?
15 C and 29.92 "Hg.
59 C and 1013.2 millibars.
59 F and 29.92 millibars.
Which factor would tend to increase the density altitude at a given airport referenced in the weather briefing?
An increase in barometric pressure.
An increase in ambient temperature.
A decrease in relative humidity.
What effect does high density altitude have on the efficiency of a small unmanned aircraft propeller?
Propeller efficiency is increased.
Propeller efficiency is decreased.
Density altitude does not affect propeller efficiency.
What effect does humidity have on performance?
It has no effect on performance.
It increases performance.
It decreases performance.
To get a complete weather overview for the planned flight, the remote pilot-in-command should obtain
An outlook briefing.
An abbreviated briefing.
A standard briefing.
Which statement is true concerning ASOS/AWOS weather reporting system?
Each AWOS station is part of a nationwide network of weather reporting stations.
ASOS locations perform weather observing functions necessary to generate METAR reports.
Both ASOS and AWOS have the capability of reporting density altitude, as long as it exceeds the airport elevation by more than 1,000 feet.
(Refer to Figure 12.) The wind direction and velocity at KJFK is from
180° true at 4 knots.
180° magnetic at 4 knots.
040° true at 18 knots.
(Refer to Figure 12.) What are the current conditions for Chicago Midway Airport (KMDW)?
Sky 700 feet overcast, visibility 1-1/2 SM, rain.
Sky 7,000 feet overcast, visibility 1-1/2 SM, heavy rain.
Sky 700 feet overcast, visibility 11, occasionally 2 SM, with rain.
(Refer to Figure 15.) In the TAF for KMEM, what does "SHRA" stand for?
Rain showers.
A shift in wind direction is expected.
A significant change in precipitation is possible.
(Refer to Figure 15.) Between 1000z and 1200z the visibility at KMEM is forecast to be
1/2 statute mile.
3 statute miles.
6 statute miles.
(Refer to figure 15.) What is the forecast wind for KMEM from 1600z until the end of the forecast?
No significant wind.
Variable in direction at 4 knots.
Variable in direction at 6 knots.
(refer to Figure 15.) According to the KMEM forecast, what is the earliest time on the 12th (today) at which the visibility may be reduced below the 3 SM minimum for sUAS operations?
1720Z.
2200Z.
2000Z.
What will a convective SIGMET be issued for?
Squall line thunderstorm.
Visibility less than 3 miles.
Surface winds greater than 40 knots.
(Refer to Figure 12.) The remarks section for KMDW has "RAB35" listed. This entry means
blowing mist has reduced the visibility to 1-1/2 SM.
rain began at 1835Z.
the barometer has risen .35 "Hg.
What is the best way for a remote pilot to determine the likelihood of local fog formation?
Monitor wind conditions to ensure the wind speed is not increasing.
Monitor the barometric pressure to ensure that it is not decreasing.
Monitor the temperature/dew point spread.
