Meteorology - ATPL - Airline Transport Pilot license

Test 10 domande ATPL - Airline Transport Pilot license - Meteorology, tempo libero

1 - A cold pool Is usually most evident in the circulation and temperature fields of the middle troposphere and may show little or no sign on a surface chart Occurs frequently in winter to the south of the Alps when this region is under the influence of cold north-westerly airstream Normally disappears at night and occurs almost exclusively in summer Develops usually in winter when very unstable maritime polar or maritime arctic air currents stream southwards along the eastern side of an extensive ridge of high pressure, in association with occluded systems

2 - Which of the following sets of conditions are most favourable to the development of thunderstorms? Extensive isothermal layer, ice particles and water droplets must exist just below the freezing level and orographic lifting. Environmental lapse rate less than saturated adiabatic lapse rate with dew point below 0 °C and considerable surface heating. Environmental lapse rate greater than saturated adiabatic lapse rate through a great vertical extent, high relative humidity and an initial lifting process. Environmental lapse rate less than dry adiabatic lapse rate with freezing level below the cloud base, high relative humidity and strong surface winds.

3 - Which of the following statements concerning the intertropical convergence zone is true? It does not change its position over the oceans during the year It lies totally in the northern hemisphere in July and totally in the southern hemisphere in January It is an area of low pressure and low relative humidity There are frequent occurrences of CB

4 - The formation of morning fog before sunrise is possible if The wind is strong Air temperature and dew point are equal or close to one another The turbulence in the lower layers is moderate The sky is overcast

5 - The presence of altocumulus lenticularis is an indication of the Risk of orographic thunderstorms Presence of mountain waves Presence of valley winds Development of thermal lows

6 - What is the approximate speed of a 90 km/h wind, expressed in knots? 50 kt 70 kt 60 kt 55 kt

7 - What is a favourable synoptic situation for the development of a Scirocco? High pressure area over Italy Extension of the Azores high pressure area over the Alps Low pressure area in the western part of the Mediterranean sea High pressure area in the western part of the Mediterranean sea

8 - An air mass is called stable when The temperature in a given air mass decreases rapidly with height The pressure in a given area is constant The vertical motion of rising air tends to become weaker and disappears The environmental lapse rate is high, with little vertical motion of air currents

9 - What is the most likely cause of a lack of clouds at higher levels in a stationary high? Sinking air Divergence at higher levels Instability Rising air

10 - An aircraft over Western Europe is crossing a jet stream 2500 FT below its core at right angles. While crossing, the outside temperature is increasing. The prevailing wind is From the right Headwind. Tailwind. From the left.

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