Aviation Weather UAS

What kind of air would one expect over a barren area on a hot, humid day?

• Smooth air

• Dry air

• Thunderstorms, low-level wind shear

• Humid air

When will clouds or fog form?

• When the temperature is cold

• When there is high pressure

• When water vapor is present (condenses)

• When there is low pressure

In what stage are thunderstorms the strongest?

• Dissipating

• Mature

• Cumulus

• The storm is strong through all stages

The presence of ice pellets at the surface is evidence there (a)   .

• Are thunderstorms in the area

• Has been cold frontal passage
• Is a temperature inversion with freezing rain at a
• Is fog

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

• Steam fog and radiation fog

Wind shear can exist (a)   .

• At all altitudes
• At low altitudes

• At high altitudes

• Wind shear does not exist in altitudes

A stable air mass is most likely to have which characteristic?

• Showery precipitation

• Poor surface visibility

• Turbulent air

• Acceptable visibility

What are characteristics of a moist, unstable air mass?

• Poor visibility and smooth air

• Haze and smoke

• Turbulence and showery precipitation

• Heavy rain and good visibility

What effect does humidity have on performance?

• It increases performance

• It decreases performance

• It has no effect on performance

• Performance on a drone is equalized

Which factor would tend to increase the density altitude at a given airport referenced in the weather briefing?

• An increase in barometric pressure

• A decrease in relative humidity

• An increase in ambient temperature

• An increase in steam fog