Results
#1. What cloud does hail fall from?
#2. Flying conditions in Ci cloud and horizontal visibility
#3. What is the composition of Ci cloud?
#4. What cloud types are classified as medium cloud?
#5. What type of cloud is associated with drizzle?
Stratus (from Latin stratum, meaning strewn) is generally a grey, layered cloud with a fairly uniform base, which may produce drizzle, or light snow. Stratus cloud is no more than 1,000 – 1 500 ft thick, and is often much thinner. Stratus is usually the lowest of all cloud types.
#6. Fair weather cumulus gives an indication of
#7. What best shows Altocumulus Lenticularis?
Altocumulus lenticularis, also known as lenticular cloud, is found downwind of mountainous or hilly areas, and is indicative of the presence of mountain wave activity. Because of its position downwind of high ground, moderate or even severe turbulence may be found beneath altocumulus lenticularis.
#8. What are Lenticularis clouds a possible indication of?
Altocumulus lenticularis, also known as lenticular cloud, is found downwind of mountainous or hilly areas, and is indicative of the presence of mountain wave activity. Because of its position downwind of high ground, moderate or even severe turbulence may be found beneath altocumulus lenticularis.
#9. In what cloud is icing and turbulence most severe?
#10. What will snow most likely fall from?
#11. A plain in Western Europe at 500m (1600ft) AMSL is covered with a uniform alto – cumulus cloud during summer months. At what height AGL is the base of the cloud expected?
Altocumulus usually occur between 8,000 and 15,000 ft with tops on some occasions as high as 23,000 ft. Usually the cloud base is between 6,500 ft and 20,000 ft.
#12. Cumulus Capillatus
A cumulonimbus capillatus is a cumulonimbus cloud with dense cirrus clouds which makes the cloud’s top appear to contain hair-like structures. The name comes from the Latin, capillatus, meaning “with hair”
#13. Clouds classified as low level are considered to have a base height of:
#14. In a Tropical Downpour the visibility is sometimes reduced to:
#15. What type of cloud is usually found at high level?
#16. What diagram, below, best shows Acc?
#17. Altostratus is
#18. What would be reflected to radar?
Hail causes echo on AIR BORNE WEATHER RADAR
#19. Which of the following clouds may extend into more than one layer?
Nimbostratus is also a medium-level cloud, but it may also extend into both the lower and upper levels of the atmosphere
#20. Which cloud would you encounter the most intensive rain?
Nimbostratus is a dense, dark-grey, rain-bearing, stratiform cloud, producing extensive and long-lasting continuous precipitation. Usually the cloud base is between the surface and 10,000ft above ground level.
#21. CB cloud in summer contains
Cumulonimbus clouds are clouds that the aviator should avoid. Cumulonimbus clouds consist of vigorous convective cloud cells of great vertical extent. In the later stages of their development, cumulonimbus clouds display a characteristic anvil top, as the upper part of the cloud hits the Tropopause. The upper parts of a cumulonimbus cloud often consist of super-cooled water droplets and ice crystals.
#22. Which cloud would produce showers?
Cumulonimbus clouds are clouds that the aviator should avoid. Cumulonimbus clouds consist of vigorous convective cloud cells of great vertical extent. In the later stages of their development, cumulonimbus clouds display a characteristic anvil top, as the upper part of the cloud hits the Tropopause. The upper parts of a cumulonimbus cloud often consist of super-cooled water droplets and ice crystals.
Within cumulonimbus, very strong upcurrents and downdraughts are continually at play, producing severe precipitation in the form of heavy showers of rain and hail.
#24. What type of cloud extends into another level?
Nimbostratus is also a medium-level cloud, but it may also extend into both the lower and upper levels of the atmosphere
#25. Ceilometers measure
As the name suggests “CLOUD CIELING” or height
#26. Which of the following will indicate medium level instability, possibly leading to thunderstorms?
Cumulonimbus clouds sometimes develop from altocumulus castellanus, when instability is present at medium levels of the Troposphere.
Cb causes thunderstorms
#27. What is the base of alto cumulus in summer?
Altocumulus takes the form of speckled white or grey cloud. The patches of cloud appear as rounded masses of fibrous or diffuse aspect. Altocumulus usually occur between 8,000 and 15,000 ft with tops on some occasions as high as 23,000 ft
in summer cloud top rises
#28. When a CC layer lies over a West European plane in summer, with a mean terrain height of 500 m above sea level, the average cloud base could be expected
#29. Which of the following cloud types can stretch across all three cloud levels (low, medium and high level)?
#30. Which of the following cloud types can stretch across at least two cloud levels?
all levels CB
2 levels NS
#31. From which cloud do you get hail?
Within cumulonimbus, very strong upcurrents and downdraughts are continually at play, producing severe precipitation in the form of heavy showers of rain and hail.
#32. If you see Alto Cu Castellanus what does it indicate?
Altocumulus castellanus is a “bubbly” form of normal altocumulus. The “towers” that form in altocumulus castellanus are like battlements on castles, hence the name. These clouds are significant because they often herald a change to showery, thundery weather and are a feature of summer weather in temperate latitudes.
Cumulonimbus clouds sometimes develop from altocumulus castellanus, when instability is present at medium levels of the Troposphere.
#33. To dissipate cloud
An inversion in the atmosphere is where temperature rises with an increase in height. This produces extreme stability and inhibits the formation of cloud
In a high pressure system, air descends at the centre. As the air descends it will be heated adiabatically and will be warmer than the air at a lower level adjacent to the surface. This is called a Subsidence Inversion.
#34. Cu is an indication of
Cumulus cloud is the most common form of convective cloud, being classified as heaped cloud, from Latin cumulare meaning to heap up. For glider pilots, a developing cumulus is regarded as a reliable indication of the presence of thermal upcurrents
developed cumulus cloud is generally dense, with sharp outlines. As it continues to develop vertically, a cumulus cloud forms mounds, domes or towers, of which the upper parts often resemble the head of a cauliflower
#35. Which clouds are evidence of stable air?
Stratus (from Latin stratum, meaning strewn) is generally a grey, layered cloud with a fairly uniform base, which may produce drizzle, or light snow. Stratus cloud is no more than 1,000 – 1 500 ft thick, and is often much thinner
#36. Lack of cloud at low level in a stationary high is due to:
Clouds form with rising air, not sinking air, high pressure has air sinking in the centre
#37. What is the most common freezing precipitation?
Freezing rain is rain maintained at temperatures below freezing by the ambient air mass that causes freezing on contact with surfaces
#38. From which of the following clouds are you least likely to get precipitation in summer?
Cs are high level clouds and AS are medium level and are very less likely to produce rain , indicates approaching weather system
#39. A layer of air cooling at the SALR compared to the DALR would give what kind of cloud?
Fohn winds are formed by this process
#40. Over flat dry land what would cause cloud?
Convection cloud formed over land by surface heating soon dissipates at night because insolation stops and the cloud droplets evaporate