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CPL Test Series
Question Bank
Questions for UPPER WIND
Answer the following questions
Test Mode
Training Mode
1. Flying 2500 ft below core of jet, with temperature increasing in the Southern Hemisphere, where does the wind come from?
Left
Right
Tail
Head
2. What type of jet stream blows constantly through the northern hemisphere?
Equatorial
Sub tropical
Arctic
Polar night
3. If an Isohypse on a surface pressure chart of 500hPa shows a figure of 522, this indicates
A low surface pressure
Topography of 522m above MSL
Pressure is 522mb
Topography of 522 decametres above MSL
4. With a polar front jet stream (PFJ), the area with the highest probability of turbulence in the Southern Hemisphere is
Above the jet core in the boundary of the warm and cold air
In the jet core
Looking downstream, on your right hand side
Looking downstream, on your left hand side
5. Wind at altitude is usually given as .......... in ..........
True, m/s
Magnetic, Kts
Magnetic, m/s
True, Kts
6. In central Europe, where are the greatest wind speeds?
5500m
Above the Alps
Tropopause level
Where the air converges
7. Under which of the following circumstances is the most severe CAT likely to be experienced?
A straight jet stream near a low pressure area
A jet stream where there is a large spacing between the isotherms
A curved jet stream near a deep trough
A westerly jet stream at low altitude in the summer
8. When and where does an Easterly jet stream occur?
In summer from SE Asia through S. India to Central Africa
In summer from the Middle East through N. Africa and the Mediterranean to S. Spain
All year through the Equator
In winter in Arctic Russia
9. When heading South in the Southern Hemisphere you experience Starboard drift
You are flying towards a low pressure
You are flying towards a lower temperature
You are flying out of a high
You are flying away from a lower temperature
10. Where are easterly and westerly jets found?
Northern and southern hemisphere
Southern hemisphere only
Northern hemisphere only
There are no easterly jets
11. When flying from south to north in the Southern Hemisphere, you cross over the Polar Front Jet. What happens to the temperature?
it remains the same
it decreases
impossible to determine
it increases
12. The core of a jet stream is located
in the warm air and directly beneath at the surface
in the warm air where the pressure surface is horizontal
in cold air
at the level where temperature change with altitude becomes little or nil and the pressure surface is at maximum slope
13. The Arctic Jet core is at
50,000ft
40,000ft
30,000ft
20,000ft
14. Contours on a weather chart indicate
Heights of pressure levels
Distance between pressure levels
Height of ground
Thickness between pressure levels
15. From the pre-flight briefing you know a jet stream is at 31,000 ft whilst you are at FL270. You experience moderate C.A.T. What would be the best course of action?
Climb
Reduce speed
Descend
Stay level
16. A jet stream with a wind speed of 350kts is
Common
Possible but very rare
Impossible
Possible in polar areas
17. What is most different about the Equatorial Easterly jet stream?
Its speed
Its height
Its length
Its direction
18. What is the ratio of height to width in a typical jet stream?
1:10000
1:1000
1:10
1:100
19. If you fly at right angles to a jet stream in Europe with a decreasing outside air temperature, you will experience
Increasing tailwind
Wind from the left
Wind from the right
Increasing headwind
20. How do you recognise high level jet streams and associated CAT?
Streaks of Cirrus
High pressure centre at high level
Lenticularis
High level dust
21. On a particular day the PFJ runs north to south in the Northern Hemisphere
The polar air is below the jet to the east
The temperature gradient runs north to south below the jet core
The polar air is east of the jet above the core
The temperature gradient runs north to south above the jet core
22. FL180, Northern Hemisphere with a wind from the left, what can you say about temperature with a heading of 360°?
Increases from North to South
Increases from South to North
Nothing
Not possible to tell without a pressure
23. The polar front jet stream in summer compared to winter in the Northern Hemisphere moves
South and decreases in strength
North and increases in strength
South and increases in strength
North and decreases in strength
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