Card Set Information

2014-04-10 13:44:55
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  1. What is a feature of air movement in a high pressure area?
    Descending to the surface then outward
  2. Where is the usual location of a thermal low?
    Over the surface of a dry, sunny region
  3. What temperature condition is indicated if precipitation in the form of wet snow occurs during flight?
    The temperature is above freezing at Flight altitude
  4. Where is a common location for an inversion?
    In the stratosphere
  5. Which term applies when the temperature of the air changes by compression or expansion with no heat added or removed?
  6. Isobars on a surface weather chart represent lines of equal pressure
    Reduced to sea level
  7. At which location does Coriolis force have the least effect on wind direction?
    At the equator
  8. How does Coriolis force affect wind direction in the Southern Hemisphere?
    Causes clockwise rotation around a low
  9. Which weather condition is defined as an anti-cyclone?
    High pressure area
  10. What is the result when water vapor changes to the liquid state while being lifted in a thunderstorm?
    Latent heat is released into the atmosphere
  11. What is a feature of supercooled water?
    The unstable water drop freezes upon striking an exposed object
  12. Which process causes adiabatic cooling?
    Expansion of air as it rises
  13. When saturated air moves downhill, its temperature increases
    at a slower rate than dry air because vaporization releases latent heat
  14. What minimum thickness of cloud layer is indicated if precipitation is reported as light or greater intensity?
    4000 feet
  15. Which condition produces weather on the lee side of a large lake?
    Warm air flowing over a colder lake may produce fog
  16. How can the stability of the atmosphere be determined?
    Ambient temperature lapse rate
  17. Atmospheric pressure changes due to a thunderstorm will be at the lowest value
    When the thunder storm is approaching
  18. Why are downdrafts in a mature thunderstorm hazardous?
    Downdrafts are kept cool by cold rain which tends to accelerate the downward velocities
  19. What is a difference between an air mass thunderstorm and a steady-state thunderstorm?
    Air mass thunderstorm downdrafts and precipitation retard the reverse of the updrafts
  20. Which type storms are most likely to produce funnel clouds or tornadoes?
    Cold front or squall line thunderstorms
  21. What type weather change is to be expected in an area where frontolysis is reported?
    The front is dissipating
  22. Which weather condition is an example of a nonfrontal instability band?
    Squall line
  23. In which meteorological conditions can frontal waves and low pressure areas form?
    Slow moving cold front or stationary fronts
  24. Under what conditions would clear air turbulence (CAT) most likely be encountered?
    When constant pressure charts show 20 knot isotachs less then 60 MN apart
  25. What action is recommended when encountering turbulence due to a wind shift associated with a sharp pressure trough?
    Establish a straight course through the troff
  26. Which type frontal system is normally crossed by the Jetstream?
    Occluded front
  27. Which action is recommended regarding an altitude change to get out of jetstream turbulence?
    Descend if ambient temperature is falling
  28. Clear air turbulence (CAT) associated with a mountain wave may extend as far as
    5000 feet above the tropopause
  29. A strong wind shear can be expected
    On the low pressure side of a 100 knot jet stream core