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