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DGCA QUESTION BANK FOR PILOTS
Practice until you score 100 %
WIND1
#1. In central Europe, where are the greatest wind speeds?
Tropopause level
5500m
Where the air converges
Above the Alps
#2. Standing in the Northern Hemisphere, north of a polar frontal depression
travelling west to east, the wind will
Continually veer
Continually back
Back then veer
Veer then back
#3. ATC will only report wind as gusting if:
Gust speeds exceeds mean speed by >15kts
Gusts to over 25kts
Gusts exceeds mean speed by 10kts
Gusts to over 25kts
#4. What is a land breeze?
From land over water at night
From land over sea by day
From sea over land by night
From sea over land by day
#5. When heading South in the Southern Hemisphere you experience Starboard
drift:
You are flying towards a lower temperature
You are flying away from a lower temperature
You are flying towards a low pressure
You are flying out of a high
#6. The gradient wind is more than geostrophic wind around an anticyclone
because the:
centrifugal force is added to the pressure gradient
centrifugal force opposes the pressure gradient
effect of coriolis is added to friction
coriolis effect opposes the centrifugal force
#7. What is the Bora?
Cold katabatic wind over the Adriatic
Northerly wind blowing from the Mediterranean
Warm anabatic wind blowing to the Mediterranean
An anabatic wind in the Rockies
#8. Flying from an area of low pressure in the Southern Hemisphere at low
altitudes, where is the wind coming from?
Right and slightly on the nose
Left and slightly on the tail
Left and slightly on the nose
Right and slightly on the tail
#9. What causes the Geostrophic wind to be stronger than the gradient wind
around a low?
Centrifugal force adds to the gradient force
Centrifugal force opposes the gradient force
Coriolis force adds to the gradient force
Coriolis force opposes the centrifugal force
#10. A METAR for Paris gave the surface wind at 260°/20. Wind at 2000ft is
most likely to be:
260°/15
210°/30
290°/40
175°/15
#11. A large pressure gradient is shown by:
Closely spaced isobars – low temperature
Distant spaced isobars – high temperature
Close spaced isobars – strong winds
Close spaced isobars – light winds
#12. Where would you expect to find the strongest wind on the ground in
temperate latitudes?
In an area of Low pressure
In an area of High pressure
In the warm air between two fronts
In a weak anticyclone
#13. 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?
Crosswind from the right
Headwind
Tailwind
Crosswind from the left
#14. What causes wind?
Difference in pressure
Rotation of the earth
Frontal systems
Difference in temperature
#15. If flying in the Alps with a Foehn effect from the south
Clouds will be covering the southern passes of the Alps
CAT on the northern side
Wind veering and gusting on the northern side
Convective weather on the southern passes of the Alps
#16. Comparing the surface wind to the 3000ft wind
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
Both are the same
#17. 90km/hr wind in kts is:
70
60
50
30
#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 left
From the right
No crosswind
Impossible to determine
#19. With all other things being equal with a high and a low having constantly
spaced circular isobars. Where is the wind the fastest?
Anticyclonic
Cyclonic
Where the isobars are closest together
Wherever the PGF is greatest.
#20. Foehn winds are
Cold fall wind
Cold katabatic
Warm descending winds
Warm anabatic
#21. 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
#22. What is the difference between Gradient and Geostrophic winds?
Difference in temperatures
A lot of friction
Curved isobars and straight isobars
Different latitudes and densities
#23. What prevents air from flowing directly from a high to a low pressure
Centripetal force
Centrifugal force
Pressure force
Coriolis force
#24. 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 slower speed
surface winds are veered from the 5000ft and have a slower speed
surface winds are backed from the 5000ft and have a faster speed
#25. What is the relationship between the 2000 ft wind and the surface wind in
the Northern Hemisphere
surface winds blow across isobars towards a high
surface winds blow parallel to isobars
surface winds blow across isobars towards a low
surface winds have laminar flow
#26. Wind is caused by?
Mixing of fronts
Horizontal pressure difference
Earth rotation
Surface friction
#27. For the same pressure gradient at 50°N, 60°N and 40°N, the geostrophic
wind speed is?
Greatest at 60N
Least at 50N
Greatest at 40N
The same at all latitudes
#28. 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
#29. Where are easterly and westerly jets found?
Northern hemisphere only
Southern hemisphere only
Northern and southern hemisphere
There are no easterly jets.
#30. In a high pressure systems
The winds tend to be stronger in the morning
The angle between the isobars and the wind direction is greatest in the afternoon
The winds tend to be stronger at night.
The winds tend to be stronger in early afternoon
#31. An aircraft is flying East to West in the Northern Hemisphere. What is
happening to his altitude?
Flying into a headwind will decrease altitude
If the wind is from the south, he will gain altitude
If the wind is from the north, he will gain altitude
Tailwind will increase altitude.
#32. Where would an anemometer be placed?
close to station, 2m above ground
on the roof of the station
10m above aerodrome elevation on a mast
next to the runway, 1m above ground
#33. Which of the following is an example of a Foehn wind?
Bora
Harmattan
Chinook
Ghibli
#34. Wind at altitude is usually given as …….. in ……..
True, m/s
Magnetic, m/s
True, KT
Magnetic, KT
#35. If you fly with left drift in the Northern Hemisphere, what is happening to
surface pressure?
Increases
Decreases
Stays the same
Cannot tell
FINISH
