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Question Bank
Questions for CLOUD
Answer the following questions
Test Mode
Training Mode
1. What are Lenticularis clouds a possible indication of?
Horizontal wind shear in the upper atmosphere
Mountain waves
Developing Cu and Cb
Instability
2. From which cloud do you get hail?
Ns
Cb
Ts
Sc
3. From which of the following clouds are you least likely to get precipitation in summer?
CS/NS
CB/CU
CU/ST
CS/AS
4. 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?
1500 - 7000ft
7000 - 15000ft
15000 - 25000ft
100 - 1500ft
5. When would you mostly likely get fair weather Cu?
17:00
15:00
07:00
12:00
6. A layer of air cooling at the SALR compared to the DALR would give what kind of cloud?
Cumulus if saturated
No cloud if saturated
Convective cloud
Stratus if saturated
7. What is the most common freezing precipitation?
Freezing pellets
Freezing graupel
Freezing rain and freezing drizzle
Freezing hail and freezing snow
8. What is the base of alto cumulus in summer?
0 - 1500’
7000’ - 16500’
1500 - 7000’
7000’ - 15000’
9. Lack of cloud at low level in a stationary high is due to
divergence at high level
sinking air
instability
rising air
10. What is the composition of Ci cloud?
Smoke particles
Super cooled water droplets
Water droplets
Ice crystals
11. If you see Alto Cu Castellanus what does it indicate?
The upper atmosphere is stable
Middle level instability
Subsistence
Instability in the lower atmosphere
12. Which of the following cloud types can stretch across at least two cloud levels?
SC
CI
NS
ST
13. Fair weather cumulus gives an indication of
Smooth flying below
Thunderstorms
Poor visibility
Turbulence
14. Clouds classified as low level are considered to have a base height of
1000 - 2000ft
100 - 200ft
500 - 1000ft
the surface - 6500ft
15. Over flat dry land what would cause cloud?
Advection.
Orographic uplift.
Release of latent heat.
Convective uplift during the day.
16. What type of cloud is usually found at high level?
Ns
Ac
Cc
St
17. What will snow most likely fall from?
Cs
Ci
Ac
Ns
18. Which clouds are evidence of stable air?
St, As
Cu, Ns
Cb, Cc
Cu, Cb
19. What type of cloud is associated with drizzle?
Cb
Ac
St
Ci
20. Flying conditions in Ci cloud and horizontal visibility
Greater than 1000m vis, no icing
Less than 500m vis, light/mod clear icing
Less then 500m vis, no icing
Greater than 1000m vis, light/mod rime ice
21. Which of the following clouds may extend into more than one layer?
Cirrus.
Nimbostratus.
Altocumulus.
Stratus
22. To dissipate cloud
Decrease in temperature
Convection
Increase pressure
Subsidence
23. What cloud does hail fall from?
Cb
Ns
Ci
Cu
24. Which of the following will indicate medium level instability, possibly leading to thunderstorms?
Altocumulus Capillatus
Altocumulus Castellanus
Red Cirrus
Halo
25. Which of the following cloud types can stretch across all three cloud levels (low, medium and high level)?
CB
CI
ST
AC
26. What type of cloud extends into another level?
As
Ns
Acc
Ci
27. Which cloud would produce showers?
NS
AS
CS
CB
28. What would be reflected to radar?
Hail
Cloud
Fog
Mist
29. Cu is an indication of
stability
vertical movement of air
the approach of a cold front
the approach of a warm front
30. What cloud types are classified as medium cloud?
Cb + St
Ns + Sc
Ci + Cs
Ac + As
31. CB cloud in summer contains
Ice crystals
Water droplets and ice crystals
Water droplets, ice crystals and super cooled water droplets
Water droplets
32. Ceilometers measure
RVR
Turbulence
Cloud height
Met Vis
33. In a Tropical Downpour the visibility is sometimes reduced to
200m
500m
1000m
less than 100m
34. Altostratus is
A high level cloud
A low level cloud
A heap type cloud
A medium level cloud
35. Which cloud would you encounter the most intensive rain?
St
Ci
Ns
Sc
36. In what cloud is icing and turbulence most severe?
Ci
Cb
Ns
Sc
37. 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
0- 100 ft above ground level
5000 - 15000 ft above ground level
15 000 - 35 000 ft above ground level
15 000 - 25 000 ft above ground level
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