WIND – Air – DGCA Question Bank For Politics

#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

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