1. In poorly defined pressure systems layers of jet stream cloudiness are generally: Answer : Scattered to broken coverage in shallow layers. Air travels in a "corkscrew" path around the jet stream with upward motion on the equatorial side. When high level moisture is available cirriform clouds form on the equatorial side of the Jet Stream in shallow scattered to broken layers. 3. In what season is clear air turbulence at its worst? Answer : In the winter. 4. Assuming that the jet stream was positioned to the north of a surface low pressure area, where would clear air turbulence be most likely? Answer : North and northeast of the low. 5. You are flying at 40,000 feet, 50 miles east of a mountain range. What statement is true regarding mountain wave CAT: Answer : Can still be expected. 6. You are on a flight through forecast turbulence. You can expect to encounter light turbulence approximately: Answer : 10 - 15% of the time. 9. Dissipation trails (distrails) are: Answer : Not common. 12. High altitude turbulence associated with a severe thunderstorm is most likely: Answer : Under the anvil.