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Question Bank
Questions for WIND1
Answer the following questions
Test Mode
Training Mode
1. An aircraft is flying East to West in the Northern Hemisphere. What is happening to his altitude?
If the wind is from the south, he will gain altitude
If the wind is from the north, he will gain altitude
Flying into a headwind will decrease altitude
Tailwind will increase altitude.
2. What is the Bora?
Northerly wind blowing from the Mediterranean
Warm anabatic wind blowing to the Mediterranean
An anabatic wind in the Rockies
Cold katabatic wind over the Adriatic
3. What is a land breeze
From sea over land by night
From land over water at night
From sea over land by day
From land over sea by day
4. What is the difference between Gradient and Geostrophic winds?
Difference in temperatures
A lot of friction
Different latitudes and densities
Curved isobars and straight isobars
5. For the same pressure gradient at 50°N, 60°N and 40°N, the geostrophic wind speed is?
Least at 50N
Greatest at 40N
The same at all latitudes
Greatest at 60N
6. In a high pressure systems
The winds tend to be stronger in early afternoon
The angle between the isobars and the wind direction is greatest in the afternoon
The winds tend to be stronger in the morning
The winds tend to be stronger at night.
7. Standing in the Northern Hemisphere, north of a polar frontal depression travelling west to east, the wind will
Continually back
Continually veer
Back then veer
Veer then back
8. Wind is caused by?
Horizontal pressure difference
Surface friction
Mixing of fronts
Earth rotation
9. At a coastal airfield, with the runway parallel to the coastline. You are downwind over the sea with the runway to your right. On a warm summer afternoon, what would you expect the wind to be on finals?
Tailwind
Crosswind from the right
Headwind
Crosswind from the left
10. Wind at altitude is usually given as …….. in ……..
True, m/s
True, KT
Magnetic, m/s
Magnetic, KT
11. Flying from an area of low pressure in the Southern Hemisphere at low altitudes, where is the wind coming from?
Left and slightly on the tail
Right and slightly on the tail
Right and slightly on the nose
Left and slightly on the nose
12. Where would an anemometer be placed?
on the roof of the station
next to the runway, 1m above ground
close to station, 2m above ground
10m above aerodrome elevation on a mast
13. What is the effect of a mountain valley wind?
it blows down a mountain to a valley at night
it blows down a mountain to a valley during the day
it blows from a valley up a mountain by day
it blows from a valley up a mountain at night
14. Where are easterly and westerly jets found?
There are no easterly jets.
Southern hemisphere only
Northern hemisphere only
Northern and southern hemisphere
15. With all other things being equal with a high and a low having constantly spaced circular isobars. Where is the wind the fastest?
Wherever the PGF is greatest.
Anticyclonic
Cyclonic
Where the isobars are closest together
16. If flying in the Alps with a Foehn effect from the south
Convective weather on the southern passes of the Alps
Wind veering and gusting on the northern side
CAT on the northern side
Clouds will be covering the southern passes of the Alps
17. What prevents air from flowing directly from a high to a low pressure
Centripetal force
Pressure force
Centrifugal force
Coriolis force
18. The Geostrophic Wind blows at your flight level in Northern Hemisphere the true altitude and indicated altitude remain constant, is the crosswind
From the right
No crosswind
From the left
Impossible to determine
19. A large pressure gradient is shown by
Close spaced isobars - strong winds
Close spaced isobars - light winds
Closely spaced isobars - low temperature
Distant spaced isobars - high temperature
20. What causes wind?
Difference in pressure
Rotation of the earth
Difference in temperature
Frontal systems
21. The wind in the Northern Hemisphere at the surface and above the friction layer at 2000 ft would be?
Veered at the surface, veered above the friction layer
Backed at the surface, veered above the friction layer
Veered at the surface, backed above the friction layer
Backed at the surface, backed above the friction layer
22. ATC will only report wind as gusting if
Gusts to over 25kts
Gusts exceeds mean speed by 10kts
Gust speeds exceeds mean speed by >15kts
Gusts to over 25kts
23. 90km/hr wind in kts is
50
30
60
70
24. Which of the following is an example of a Foehn wind?
Harmattan
Chinook
Bora
Ghibli
25. If you fly with left drift in the Northern Hemisphere, what is happening to surface pressure?
Stays the same
Cannot tell
Decreases
Increases
26. A METAR for Paris gave the surface wind at 260°/20. Wind at 2000ft is most likely to be
175°/15
290°/40
210°/30
260°/15
27. What causes the Geostrophic wind to be stronger than the gradient wind around a low?
Centrifugal force opposes the gradient force
Centrifugal force adds to the gradient force
Coriolis force adds to the gradient force
Coriolis force opposes the centrifugal force
28. When heading South in the Southern Hemisphere you experience Starboard drift
You are flying out of a high
You are flying towards a low pressure
You are flying towards a lower temperature
You are flying away from a lower temperature
29. What is the relationship between the 5000 ft wind and the surface wind in the southern hemisphere
surface winds are veered from the 5000ft and have the same speed
surface winds are backed from the 5000ft and have a faster speed
surface winds are backed from the 5000ft and have a slower speed
surface winds are veered from the 5000ft and have a slower speed
30. Foehn winds are
Cold fall wind
Warm descending winds
Warm anabatic
Cold katabatic
31. Where would you expect to find the strongest wind on the ground in temperate latitudes?
In the warm air between two fronts
In a weak anticyclone
In an area of High pressure
In an area of Low pressure
32. The gradient wind is more than geostrophic wind around an anticyclone because the
centrifugal force opposes the pressure gradient
centrifugal force is added to the pressure gradient
effect of coriolis is added to friction
coriolis effect opposes the centrifugal force
33. In central Europe, where are the greatest wind speeds?
Above the Alps
Tropopause level
Where the air converges
5500m
34. What is the relationship between the 2000 ft wind and the surface wind in the Northern Hemisphere
surface winds have laminar flow
surface winds blow parallel to isobars
surface winds blow across isobars towards a high
surface winds blow across isobars towards a low
35. Comparing the surface wind to the 3000ft wind
Both are the same
Surface wind veers and is less then the 3000ft wind
Surface wind blows along the isobars and is less than the 3000ft wind
Surface wind blows across the isobars and is less than the 3000ft wind
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