Meteorology - ATPL - Airline Transport Pilot license

Test 10 domande Meteorology, tempo libero

1 - The isobars drawn on a surface weather chart represent lines of equal pressure Reduced to sea level At a determined density altitude At height of observatory At flight level

2 - In order to calculate QFE from QNH, which of the following must be known ? Temperature at the airfield. Elevation of the airfield and the temperature at MSL. Elevation of the airfield. Elevation and the temperature at the airfield.

3 - Absolute instability is said to exist whenever the environmental lapse rate Is less than the dry adiabatic lapse rate Is less than the saturated adiabatic lapse rate Exceeds the dry adiabatic lapse rate Is between the dry and saturated adiabatic lapse rate

4 - An air mass acquires its basic properties By the influence of jet streams By stagnation of the air for a long period of time over areas having particular characteristics In the westerlies of the mid-latitudes By widespread thunderstorms

5 - What is a downburst? A concentrated downdraft with high speeds and a higher temperature than the surrounding air. An extremely strong wind gust in a tropical revolving storm. A concentrated downdraft with high speeds and a lower temperature than the surrounding air. A small low pressure system where the wind circulates with very high speeds.

6 - Stratus formed by turbulence will occur when The wind speed is less than 10 kt and the air is heated by the earth's surface The wind speed is greater than 10 kt and the condensation level is situated just above the turbulent layer In the friction layer mixing occurs by turbulence and the condensation level is situated below the top of the turbulent layer Absolute instability exists at low level

7 - What are squall lines? The surface weather associated with upper air troughs. Unusual intensive cold fronts. The paths of tropical revolving storms. Bands of intensive thunderstorms.

8 - When fog is reported, the visibility is below 1.5 km 0.8 km 3 km 1 km

9 - A plain in Western Europe with an average elevation of 500 m (1600') above sea level is covered with a uniform AC layer of cloud during the summer months. At what height above the ground is the base of this cloud to be expected? 1500 - 7000' above the terrain 100 - 1500' above the terrain 15000 - 25000' above the terrain 7000 - 15000' above the terrain

10 - The maximum vapour pressure over a flat supercooled water surface and the maximum vapour pressure over a flat ice surface of the same temperature are compared. The maximum vapour pressure is Equal over both surfaces Smaller over the water surface The same over both surfaces if the air pressure is the same Greater over the water surface

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