Understanding Weather for Part 107

What is the primary source of weather data for pilots in the United States?

• National Weather Service (NWS)

• Federal Aviation Administration (FAA)

• Aviation Weather Center (AWC)

Which type of cloud is most likely to produce severe turbulence and thunderstorms?

• Cirrus

• Cumulonimbus

• Stratus

What is the standard atmospheric pressure at sea level in inches of mercury (Hg)?

• 29.92 inches Hg

• 30.00 inches Hg

• 28.00 inches Hg

Which weather phenomenon is characterized by a rapid change in wind speed and/or direction over a short distance?

• Microburst

• Wind shear

• Jet stream

What is the term for the temperature at which air becomes saturated and water vapor begins to condense?

• Dew point

• Relative humidity

• Saturation point

Which type of fog forms when warm, moist air moves over a cooler surface?

• Radiation fog

• Advection fog

• Upslope fog

Which weather condition is typically associated with a high-pressure system?

• Stormy weather

• Clear skies

• Heavy rainfall

What is the term for a boundary separating two masses of air of different densities?

• Front

• Isobar

• Thermocline

What type of precipitation occurs when raindrops freeze before reaching the ground?

• Sleet

• Hail

• Snow

What type of cloud is typically associated with fair weather and has a fluffy, cotton-like appearance?

• Stratus

• Cumulus

• Nimbostratus