MET

Question 1

How does wind vary from 2000’ to SFC and from day to night?

Answer 1

Backs and Slacks due to Friction

Question 2

Effects of Icing on AC

Answer 2

AAEUCPCVV.

Aerodynamics, All Up Mass Incr, Engine, Undercarriage, Control Sfc, Pitot Static Syst, Comms, Vision, Vibration

Question 3

2 Types of Icing

Answer 3

Rime (Hoar Frost, Freezes Quickly)

Clear (Big H2O Droplets, Freezes Slowly)

Question 4

Icing Clouds

Answer 4

CB, TCU, NS

All Imply Sev Icing

Question 5

Slant Vis?

Answer 5

Hyp of triangle - better above HZ, poor in HZ

Question 6

Prevailing Vis

Answer 6

Over half the circle

Question 7

Min Vis

Answer 7

When colour state changes or less than 1/2 prevailing (civ)

Question 8

RVR

Answer 8

Reported when vis less than 1500m

Question 9

When is advection fog formed?

Answer 9

When moist air moves across cold land, cools to dew point.

Forms over land in winter, sea in summer

Question 10

Radiation Fog

Answer 10

light winds, clear skies, long night

Question 11

Polar Continental SS Track (Summer/ Winter)

Answer 11

SUMMER - Ltd instability, SCT CU, HZ, Mod-Good Vis

WINTER - Stable, NSC, HZ, Mod Vis

Question 12

Polar Continental LS Track (Summer/ Winter)

Answer 12

SUMMER - Stable, OVC ST SC, DZ, Mod-Poor Vis

WINTER - Unstable, BKN CU CB, SHRA/SN/GR, TS, Good Vis except in SH

Question 13

Hazards of Trough

Answer 13

CBs, TS, Icing

Question 14

Anticyclone (Summer/ Winter)

Answer 14

SUMMER - HZ

WINTER - Icing, FG

Question 15

Draw Global Pressures, Cells etc.

Answer 15

Diagram incl. H, L, Polar, Ferrel, Hadley, PFJ, STJ, ITCZ, Equatorial Trough, Trade Winds

Question 16

Active ITCZ

Answer 16

CB TS up to Trop (65000’)

Question 17

Mediterranean

Answer 17

SUMMER - Hot, Dry w depressions. Sub-tropical H moves into region bringing HZ.

WINTER - Cooler, Rain, TS, Low comes in from N

Question 18

Explain Asiatic Monsoon

Answer 18

SUMMER - L over Land, H to L from SW brings warm moist air. Tropical Maritime Airmass.

WINTER - H over Continent, Draws cold air from contient NE wind.

Question 19

Tropical Storms req’d conditions

Answer 19

Low Winds, PS26 Sea Temp, Moist Air, 5-15deg from Equator (needs PGF), unstable

Question 20

Significance of Tropopause

Answer 20

Jet Engines most efficient, Nil Wx above, Contrails form nr Trop, CAT, Jetstreams just below

Question 21

Why does Trop vary?

Answer 21

Air MAsses

Question 22

Why does Vwind incr with height?

Answer 22

Greater deltaT, incr PGF

Question 23

How do you avoid/ lessen contrails?

Answer 23

Fly above Trop, find warmer/ drier air/ reduce throttle

Question 24

CAVOK Req?

Answer 24

Greater than 10KM Vis, NSW, no CB or TCU, No Cloud below 5000’

Question 25

How far ahead of SFC Warm Front will you find JS?

Answer 25

300-450NM

Question 26

CAT Causes

Answer 26

JS, Lee Mountain, Trough, Convergence,

Question 27

PRFG, BCFG, MIFG, VCFG

Answer 27

Bank of Fog, Patches, Shallow, In Vicinity

Question 28

STJ Characteristics

Answer 28

Circulates globe in Winter, Intermittent in Summer.