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Question Bank
Questions for IC JETSTREAM
Answer the following questions
Test Mode
Training Mode
1. Sub-tropical Jet stream (STJ) is
Westerly
Easterly
Southerly
2. The STJ strengthens
Downstream
Northwards
Upstream
3. The STJ affects India from
Jun to Jul
Oct to May
Aug to Sep
4. The TJ prevails over the Indian Peninsula from
Jun to Aug
May to Jun
Sep to Oct
5. The vertical wind shear in Jet stream is about
6m/s km
5m/s km
8m/s km
6. A jet stream can be recognized by
High level dust
High Pressure
Streaks of CI
Lenticular clouds
7. In a jet stream, the path of the maximum speed is known as
Axis
Core
Jet streak
8. The wind speed along the axis of a jet stream is always
Not uniform
Uniform
9. In a wavy jet the Jet streaks are located over or near the
Ridge
Between Trough and Ridge
Trough
10. The TJ is located over the Indian Peninsula, approximately at
13°N
18°N
17°N
11. In the TJ the wind shears are much _____ than the STJ
same
more
less
12. Jet stream has
one maxima
one or more maxima
only two maxima
13. Vertical wind shear in STJ is greater ______ the core
below
above
along
14. Flying at right angles to a jet stream with falling pressure you will experience
Increasing head wind
Wind from right
Wind from left
Increasing tail wind
15. The normal position of Sub-tropical Jet Stream is
35°N
27°N
30°N
16. When and where tropical jet stream occurs
In summers over SE Asia and Central Africa
In Middle East in summers
All year along equator
In winters over Russia
17. Compared to horizontal wind shear the vertical wind shear in a Jet stream is
same
weaker
stronger
18. Along the axis of a jet stream there are centres of high speed winds, these are called
Core
Jet streaks
Axis
19. The southern most position of STJ is February is
22°N
20°N
18°N
20. The arbitrary lower limit of jet core velocity has been assigned by WMO as
70 m/s
60 m/s
60 kt
21. STJ has a layered structure. There are often two layers of max wind to the ____ of jet core
S
N
SW
22. At and near the STJ the temperature gradient is very
Large
Moderate
Small
23. The TJ is located over Indian, approximately at a height of
15 - 16 km
11 - 12 km
12 - 13 km
24. TJ is
Easterly
Westerly
Southerly
25. The TJ is strongest in
June
Sep to Oct
July - Aug
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