MET-BNC-MODULE2

1. Which one of the following types of cloud is most likely to produce heavy precipitation ?




2. What characteristics will the surface winds have in an area where the isobars on the weather map are very close together?




3. Which forces are balanced with geostrophic winds?




4. How does moderate turbulence affect an aircraft?




5. Which degree of aircraft turbulence is determined by the following ICAO description? "There may be moderate changes in aircraft attitude and/or altitude but the aircraft remains in positive control at all times. Usually, small variations in air speed. Changes in accelerometer readings of 0.5 to 1.0 g at the aircraft's centre of gravity. Occupants feel strain against seat belts. Loose objects move about. Food service and walking are difficult."




6. For an aircraft what are the meteorological dangers associated with a Harmattan wind?




7. What is the strong relatively cold katabatic wind, blowing down the northern Adriatic coast, mainly during the winter and spring called?




8. In a land- and sea-breeze circulation the land-breeze blows:




9. A high pressure area (slack pressure gradient) covers part of the Mediterranean Sea and coastal region during the summer. What surface wind direction is likely at an airport at the coast on a sunny afternoon?




10. A mountain breeze (katabatic wind) blows




11. Generally northern hemisphere winds at 5000 FT/AGL are south-westerly while most of the surface winds are southerly. What is the primary reason of difference between these two wind directions?




12. Friction between the air and the ground results in the northern hemisphere in:




13. Whilst flying at FL 180 on the northern hemisphere an aircraft experiences right drift. What effect, if any, will this have on the aircraft's true altitude ?




14. What is the most likely temperature at the tropical tropopause?




15. Which weather condition lowers true altitude as compared to pressure altitude to a position where flight over mountains could be dangerous?




16. In the southern hemisphere what wind effect would you expect when flying from a high pressure area towards a low pressure area at FL 100?




17. What degree of turbulence, if any, is likely to be encountered while flying through a cold front in the summer over Central Europe at FL 100?




18. You are flying at 2 500 FT/AGL, the wind is 180°, and intend to land at an airport, at sea level directly below. From approximately which direction would you expect the surface wind (mid-latitude, northern hemisphere)?




19. What are the typical differences with regard to the temperature and humidity between an air mass with its origin in the Azores and an air mass with its origin over northern Russia ?




20. Where is the source of tropical continental air that affects Europe in summer?




21. Where does polar continental air originate?




22. In which air mass are extremely low temperatures encountered?




23. With what type of clouds are showers most likely associated?




24. At what time of day, or night, is radiation fog most likely to occur?




25. What is the average vertical extent of radiation fog?




26. Which of the following weather conditions favour the formation of radiation fog?




27. What type of fronts are most likely to be present during the winter in Central Europe when temperatures close to the ground are below 0°C, and freezing rain starts to fall?




28. Which of the following conditions are you most likely to encounter when approaching an active warm front at medium to low level ?




29. During a cross-country flight at FL 50, you observe the following sequence of clouds: Nimbostratus, Altostratus, Cirrostratus, Cirrus. Which of the following are you most likely to encounter ?




30. What cloud formation is most likely to occur at low levels when a warm air mass overrides a cold air mass?




31. The approximate inclined plane of a warm front is:




32. What type of low pressure area is associated with a surface front?




33. In which approximate direction does the centre of a non-occluded frontal depression move?




34. Where is the coldest air to be found, in an occlusion with cold front characteristics?




35. What type of front / occlusion usually moves the fastest?




36. Over Central Europe what type of cloud cover is typical of the warm sector of a depression during winter?




37. What weather conditions are prevalent during the summer, over the North Sea, approximately 300 km behind a quickly moving cold front?




38. What is the surface visibility most likely to be, in a warm sector of tropical maritime air, during a summer afternoon in western Europe ?




39. Which one of the following statements regarding the intertropical convergence zone (ITCZ) is correct?




40. In which of the following bands of latitude is the intertropical convergence zone most likely to be encountered in January, between Dakar and Rio de Janeiro?




41. What weather conditions are indications of the summer monsoon in India?




42. After passing at right angles through a very active cold front in the direction of the cold air, what will you encounter at FL 50, in the northern hemisphere immediately after a marked change in temperature?




43. When are the rainy seasons in equatorial Africa?




44. Which of the following best describes the intertropical convergence zone ?




45. What is the likely track for a hurricane in the Caribbean area?




46. During which seasons are hurricanes most likely to appear in the northern hemisphere?




47. What is encountered during the summer, over land, in the centre of a cold air pool?




48. How do you recognize a cold air pool?




49. What surface weather is associated with a stationary high pressure region over land in the winter?




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