atpl/oxford/met/ch10

Question 1

Standing in the Northern Hemisphere, north of a polar frontal depression travelling west to east, the wind will

Answer 1

Continually back

Question 2

ATC will only report wind as gusting if:

Answer 2

Gusts exceeds mean speed by 10kts

Question 3

What is a land breeze?

Answer 3

From land over water at night

Question 4

When heading South in the Southern Hemisphere you experience Starboard drift:

Answer 4

You are flying away from a lower temperature

Question 5

What is the Bora?

Answer 5

Cold katabatic wind over the Adriatic

Question 6

Flying from an area of low pressure in the Southern Hemisphere at low altitudes, where is the wind coming from?

Answer 6

Left and slightly on the nose

Question 7

What causes the Geostrophic wind to be stronger than the gradient wind around a low?

Answer 7

Centrifugal force opposes the gradient force

Question 8

A large pressure gradient is shown by:

Answer 8

Close spaced isobars - strong winds

Question 9

Where would you expect to find the strongest wind on the ground in temperate latitudes?

Answer 9

In an area of Low pressure

Question 10

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?

Answer 10

Crosswind from the right

Question 11

What causes wind?

Answer 11

Difference in pressure

Question 12

If flying in the Alps with a Föhn effect from the south

Answer 12

Clouds will be covering the southern passes of the Alps

Question 13

Comparing the surface wind to the 3000ft wind

Answer 13

Surface wind blows across the isobars and is less than the 3000ft wind

Question 14

90km/hr wind in kts is:

Answer 14

50

Question 15

The Geostrophic Wind blows at your flight level in Northern Hemisphere the true altitude and indicated altitude remain constant, is the crosswind

Answer 15

No crosswind

Question 16

With all other things being equal with a high and a low having constantly spaced circular isobars. Where is the wind the fastest?

Answer 16

Anticyclonic

Question 17

Föhn winds are

Answer 17

Warm descending winds

Question 18

What is the effect of a mountain valley wind?

Answer 18

it blows down a mountain to a valley at night

Question 19

What is the difference between Gradient and Geostrophic winds?

Answer 19

Curved isobars and straight isobars

Question 20

What prevents air from flowing directly from a high to a low pressure?

Answer 20

Coriolis force

Question 21

Wind is caused by:

Answer 21

Horizontal pressure difference

Question 22

For the same pressure gradient at 50N, 60N and 40N, the geostrophic wind speed is:

Answer 22

Greatest at 40N

Question 23

Where are easterly and westerly jets found?

Answer 23

Northern hemisphere only

Question 24

In high pressure systems:

Answer 24

The winds tend to be stronger in early afternoon.

Question 25

An aircraft is flying East to West in the Northern Hemisphere. What is happening to his altitude?

Answer 25

If the wind is from the north, he will gain altitude

Question 26

Where would an anemometer be placed?

Answer 26

10m above aerodrome elevation on a mast

Question 27

Which of the following is an example of a Foehn wind?

Answer 27

Chinook

Question 28

Wind at altitude is usually given as …….. in ……..

Answer 28

True, KT

Question 29

If you fly with left drift in the Northern Hemisphere, what is happening to surface pressure?

Answer 29

Increases