What change of wind direction can be expected during the passage of a polar front low in Central Europe? Backing wind during passage of the warm front, veering wind during passage of the cold front Backing wind during passage of the warm front, backing wind during passage of the cold front Veering wind during passage of the warm front, veering wind during passage of the cold front Veering wind during passage of the warm front, backing wind during passage of the cold front.
Extensive high pressure areas can be found throughout the year ... in areeas showing extensive lifting processes. in mid latitudes along the polar front over oceanic areas at latitues around 30°N/S. on tropical areas, close to the equator.
What cloud type can typically be observed across widespread high pressure areas during summer? Overcast low stratus Scattered Cu clouds Overcast Ns clouds Squall lines and thunderstorms.
What pressure pattern may result from cold-air inflow in high tropospheric layers? Formation of a low in the upper troposphere Formation of a high in the upper troposphere Formation of a large ground low Alternating pressure.
Cold air inflow in high tropospheric layers may result in... showers and thunderstorms. stabilisation and calm weather. frontal weather. calm weather and cloud dissipation.
How does inflowing cold air affect the shape and vertical distance between pressure layers? Increasing vertical distance, raise in height (high pressure) Decreasing vertical distance, raise in height (high pressure) Decrease in vertical distance, lowering in height (low pressure) Increase in vertical distance, lowering in height (low pressure).
What weather phenomena have to be expected around an upper-level trough? Calm wind, forming of shallow cumulus clouds Calm weather, formation of lifted fog layers Formation of high stratus clouds, ground-covering cloud bases Development of showers and thunderstorms (Cb).
What frontal line divides subtropical air from polar cold air, in particular across Central Europe? Occlusion Cold front Polar front Warm front.
What weather conditions can be expected in high pressure areas during summer? Changing weather with passing of frontal lines Squall lines and thunderstorms Calm winds and widespread areas with high fog Calm weather and cloud dissipation, few high Cu.
What weather conditions in Central Europe are typically found in high pressure areas during summer? Large isobar spacing with calm winds, formation of local wind systems Large isobar spacing with strong prevailing westerly winds Small isobar spacing with calm winds, formation of local wind systems Small isobar spacing with strong prevailing northerly winds.
What weather conditions can be expected in high pressure areas during winter? Changing weather with passing of frontal lines Calm weather and cloud dissipation, few high Cu Calm winds and widespread areas with high fog Squall lines and thunderstorms.
What wind conditions can be expected in areas showing large distances between isobars? Formation of local wind systems with strong prevailing westerly winds Strong prevailing easterly winds with rapid backing Strong prevailing westerly winds with rapid veering Variable winds, formation of local wind systems.
What weather conditions can be expected during "Foehn" on the windward side of a mountain range? Dissipating clouds with unusual warming, accompanied by strong, gusty winds Scattered cumulus clouds with showers and thunderstorms Layered clouds, mountains obscured, poor visibility, moderate or heavy rain Calm wind and forming of high stratus clouds (high fog).
Which of the stated wind phenomena will increase in speed since its path is narrowed by mountains? Bora Mistral Scirocco Passat.
What is the name of the the cold, katabatic wind phenomena blowing from northeast into the Adriatic Sea? Bora Mistral Scirocco Passat.
Which of the following conditions are most favourable for ice accretion? Temperatures between 0° C and -12° C, presence of supercooled water droplets (clouds) Temperaturs below 0° C, strong wind, sky clear of clouds Temperatures between +10° C and -30° C, presence of hail (clouds) Temperatures between -20° C and -40° C, presence of ice crystals (Ci clouds).
What temperatures are most dangerous with respect to airframe icing? +5° to -10° C 0° to -12° C -20° to -40° C +20° to -5° C.
Which type of ice forms by very small water droplets and ice crystals hitting the front surfaces of an aircraft? Clear ice Mixed ice Hoar frost Rime ice.
Which type of ice forms by large, supercooled droplets hitting the front surfaces of an aircraft? Clear ice Mixed ice Hoar frost Rime ice.
What situation may result in the occurrence of severe wind shear? Flying ahead of a warm front with visible Ci clouds Cross-country flying below Cu clouds with about 4 octas coverage During final approach, 30 min after a heavy shower has passed the airfield When a shower is visible close to the airfield.
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