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