Part 107 weather questions

104What does the "OVC" notation in a METAR report indicate?

105Density altitude is best described as:

106A METAR reads: "27015KT". What does this mean?

107Which weather phenomenon poses the greatest risk of causing a loss of control for a small UAS?

108What are characteristics of a moist, unstable air mass?

109What effect does high density altitude have on the efficiency of a UA propeller?

110What are the characteristics of stable air?

111You receive a briefing indicating a low-level temperature inversion with high relative humidity. What weather conditions would you expect?

112In a METAR report, what does "BKN015" indicate?

113An AIRMET Sierra is issued to warn pilots of:

114An AIRMET Tango is issued to warn pilots about:

115An AIRMET Zulu provides information about:

116What is the primary distinction between a SIGMET and an AIRMET?

117A Convective SIGMET (WST) is issued for which conditions?

118A Terminal Aerodrome Forecast (TAF) covers what area and time period?

119Radiation fog is most likely to form under which conditions?

120What are the three stages of a thunderstorm cell in the correct sequence?

121What is a microburst and why is it particularly hazardous to aviation?

122When the temperature and dew point spread is 4°F (2°C) or less, what weather condition becomes likely?

123What weather sequence is typically associated with the passage of a fast-moving cold front?

124In aviation weather, how is "ceiling" defined?

125What is the primary value of a Pilot Weather Report (PIREP) compared to other weather products?

126What does the "CAVOK" group in a METAR report indicate?

127What does a rapidly falling barometric pressure reading indicate for weather planning purposes?

128Which type of fog is most likely to form on a clear, calm night over a recently irrigated field?

129What is "wind shear" and why is it hazardous to sUAS operations?

130What is the standard atmospheric lapse rate and why does it matter for density altitude calculations?

131A remote pilot reviews the following METAR before a real estate shoot: KXYZ 141555Z 18012KT 2SM -RA OVC007 22/20 A2982. Can the pilot legally conduct the operation under standard Part 107?

132A remote pilot is set up for a commercial survey 18 miles from a visible line of cumulonimbus clouds. The briefing forecasts storm movement away from the survey area over 2 hours. The client has a hard deadline. What is the correct decision?

133A remote pilot is preparing for a construction documentation mission. The nearest weather station reads 9 knots of surface wind. Observing the tree line along the property, the pilot notices upper branches swaying vigorously while lower foliage is relatively still. What is the most accurate interpretation?

134A remote pilot arrives at a shoot at 10 AM. Surface visibility appears clear for several miles horizontally. However, looking toward their 350-foot planned altitude, the sky appears hazy and milky above approximately 200 feet. This visual effect is most likely caused by:

135A remote pilot reviews the following METAR before a 1 PM shoot: KXYZ 151755Z 09006KT 6SM SCT020 BKN035 24/17 A3001. The planned altitude is 250 feet AGL. Can the pilot legally conduct the operation under standard Part 107 cloud clearance and visibility rules?

136A remote pilot is preparing a construction documentation flight. The current observation reports 3 SM visibility and a broken ceiling at 1,200 feet AGL. The client says the shot only needs 200 feet AGL and 10 minutes. Part 107 minimums are 3 SM visibility and 500 feet below clouds. What is the correct decision?

137A remote pilot plans a 30-minute roof inspection at 10 AM. The TAF shows a cold front passing the area at 12 PM with wind shift from 180 degrees at 8 knots to 320 degrees at 18 knots gusting 28, and a period of rain showers. The drone is rated to 22 knots. What is the correct planning decision?

138A remote pilot arrives at a construction documentation job in Denver (field elevation 5,400 feet MSL) on a July afternoon. Temperature is 94°F, pressure is 30.10 inHg, and the planned altitude is 200 feet AGL. The drone's spec sheet lists 'rated ceiling 16,000 feet' under standard atmospheric conditions. What performance consideration should dominate the pilot's pre-flight planning?

139A remote pilot is finishing the last of three real estate shoots scheduled for the day. A Convective SIGMET was issued 20 minutes ago for an area 25 miles west, and cumulonimbus buildups are visible on the western horizon. The current shoot location has clear skies and calm winds. The listing agent needs the shots today. What is the correct decision?

140A remote pilot has a 7 AM shoot tomorrow. The 00Z TAF reads in part: FM1200 18008KT P6SM FEW050 BKN120. What does this forecast predict for the 7 AM flight window, and how should the pilot plan?

141A remote pilot is hired for a winter construction progress shoot in northern Wisconsin. Temperature is 18°F with 75% relative humidity, no precipitation, and light winds. The batteries have been in the vehicle overnight. What pre-flight decisions are most important?