Aviation Meteorology Exam 3
Questions And Answers
/.1. What are the units used for radar reflectivity (for which the echo colors are based)? -
Answer-✅dBZ
/.2. Microwave radiation from weather radar gets reflected toward the radar by
precipitation. The amount that gets reflected back toward the radar is proportional to
which? (where D = particle diameter) - Answer-✅D^6
/.3. Which of the following indicates moderate intensity rainfall according to the FAA? -
Answer-✅30-40 dBZ
/.4. What is the typical wavelength of the energy emitted by weather radar (which
focuses on precipitation-size particles)? - Answer-✅about 10cm
/.5. Doppler radar. Blue flows to red. Therefore, these winds are southerly, i.e, from the
south. You may see "from the south to the southeast." - Answer-✅Southerly wind
/.6. The polar jet stream is caused by an increase in the pressure gradient with
height(increased tilt of pressure surfaces). The increased tilt of the pressure surfaces is
caused by horizontal changes in... - Answer-✅temperature
/.7. Know your semi-permanent weather cells and two jet streams - Answer-✅Polar
Cell, Ferrel Cell, Hadley Cell
Polar Jet, Subtropical Jet
/.8. Frontal passage. Veering or backing? What is the direction of wind that typically
occurs with the passage of a surface front? - Answer-✅Veering
/.9. Know your cyclone stages - Answer-✅Stationary front, frontal wave, open wave,
mature, advanced occlusion, cut-off cyclone
/.10. Airmass profiles from Skew-T - Answer-✅Continental artic, maritime tropic
/.11. Airmass profiles from Skew-T - Answer-✅
/.12. Airmass profiles from Skew-T - Answer-✅
, /.13. What is the typical altitude of the maximum winds of the Southerly Low-Level Jet
that occurs with Mid-Latitude Cyclones? - Answer-✅5000 ft
/.14. Diffluent flow? - Answer-✅
/.15. What will happen at each location? - Answer-✅D: warm up
C: cool off
A: dry and moist
/.16. Where is the strong tailwind? - Answer-✅C
/.17. What weather concept best explains...you will be given a radar image with cold air
blowing over an open Great Lake in the wintertime. - Answer-✅Air mass modification
/.18. Name three lifting agents that cause air to ascend. Convergence, convection,
mechanical, frontal, orographic? - Answer-✅Convergence, convection, frontal
/.19. Four indicators of a cold front passage. - Answer-✅temperature drop, dew point
drop, decrease in relative humidity, altimeter rise
/.20. Know how to read weather radar - Answer-✅A: gust front
B: heavy to extreme precipitation
C: bow line
D: ground clutter
E: not needed
/.21. Jet stream exit/entrance. How does a jet enhance surface development? - Answer-
✅Left = exit, right = entrance
/.22. Know the Sig Wx chart. Tropopause height in rectangle, etc. Four questions: -
Answer-✅3- tropopause at 50000
2- jetstream at 90 kt 39000
1-
/.23. Windspeed/direction/altitude? - Answer-✅160 kt
/.24. Name some hazards associated with a thunderstorm. - Answer-✅turbulence, rapid
altimeter changes, downbursts, hail, severe icing, low level wind shear
/.25. Match the three stages of a thunderstorm - Answer-✅A: Cumulus
B: mature
C: dissipating
Questions And Answers
/.1. What are the units used for radar reflectivity (for which the echo colors are based)? -
Answer-✅dBZ
/.2. Microwave radiation from weather radar gets reflected toward the radar by
precipitation. The amount that gets reflected back toward the radar is proportional to
which? (where D = particle diameter) - Answer-✅D^6
/.3. Which of the following indicates moderate intensity rainfall according to the FAA? -
Answer-✅30-40 dBZ
/.4. What is the typical wavelength of the energy emitted by weather radar (which
focuses on precipitation-size particles)? - Answer-✅about 10cm
/.5. Doppler radar. Blue flows to red. Therefore, these winds are southerly, i.e, from the
south. You may see "from the south to the southeast." - Answer-✅Southerly wind
/.6. The polar jet stream is caused by an increase in the pressure gradient with
height(increased tilt of pressure surfaces). The increased tilt of the pressure surfaces is
caused by horizontal changes in... - Answer-✅temperature
/.7. Know your semi-permanent weather cells and two jet streams - Answer-✅Polar
Cell, Ferrel Cell, Hadley Cell
Polar Jet, Subtropical Jet
/.8. Frontal passage. Veering or backing? What is the direction of wind that typically
occurs with the passage of a surface front? - Answer-✅Veering
/.9. Know your cyclone stages - Answer-✅Stationary front, frontal wave, open wave,
mature, advanced occlusion, cut-off cyclone
/.10. Airmass profiles from Skew-T - Answer-✅Continental artic, maritime tropic
/.11. Airmass profiles from Skew-T - Answer-✅
/.12. Airmass profiles from Skew-T - Answer-✅
, /.13. What is the typical altitude of the maximum winds of the Southerly Low-Level Jet
that occurs with Mid-Latitude Cyclones? - Answer-✅5000 ft
/.14. Diffluent flow? - Answer-✅
/.15. What will happen at each location? - Answer-✅D: warm up
C: cool off
A: dry and moist
/.16. Where is the strong tailwind? - Answer-✅C
/.17. What weather concept best explains...you will be given a radar image with cold air
blowing over an open Great Lake in the wintertime. - Answer-✅Air mass modification
/.18. Name three lifting agents that cause air to ascend. Convergence, convection,
mechanical, frontal, orographic? - Answer-✅Convergence, convection, frontal
/.19. Four indicators of a cold front passage. - Answer-✅temperature drop, dew point
drop, decrease in relative humidity, altimeter rise
/.20. Know how to read weather radar - Answer-✅A: gust front
B: heavy to extreme precipitation
C: bow line
D: ground clutter
E: not needed
/.21. Jet stream exit/entrance. How does a jet enhance surface development? - Answer-
✅Left = exit, right = entrance
/.22. Know the Sig Wx chart. Tropopause height in rectangle, etc. Four questions: -
Answer-✅3- tropopause at 50000
2- jetstream at 90 kt 39000
1-
/.23. Windspeed/direction/altitude? - Answer-✅160 kt
/.24. Name some hazards associated with a thunderstorm. - Answer-✅turbulence, rapid
altimeter changes, downbursts, hail, severe icing, low level wind shear
/.25. Match the three stages of a thunderstorm - Answer-✅A: Cumulus
B: mature
C: dissipating
