Meteorology

Question 1

What’s the criteria for a gale warning?

Answer 1

34-47kts sustained surface wind

Question 2

ATC can report 2 types of surface wind. What are they?

Answer 2

Instant and 30s average

Question 3

What is the max number of RVR recording points on an instrument runway. Where are they?

Answer 3

Touch down
Mid point
Stop end

Question 4

How often is Metform 215 issued?

Answer 4

Every 6 hours

Each one covers a 9 hour period

Question 5

How is the effect of moderate turbulence described in the AIP?

Answer 5

Moderate changes in attitude and/or altitude may occur.
Aircraft remains in positive control
Difficulty walking, loose objects move around

Question 6

What is the frequency and operating hours of London Volmet South?

Answer 6

128.6

Question 7

Decode the following Metar items:
DZ
GR
SG
FZFG
VA
VV

Answer 7

Drizzle
Hail
Snow grains
Freezing fog
Volcanic ash
Vertical visibility

Question 8

What conditions apply during CAVOK?

Answer 8

> 10km vis
No cloud of operational consideration (<5000ft)
No CBs TCUs
No fog, snow etc

Question 9

4 types of icing

Answer 9

Rime ice
Clear ice
Mixed
Hoar frost

Question 10

Approaching warm front, where get icing?

Answer 10

In cold sector before front, in rain but clear of cloud

Question 11

Fog or mist?

Answer 11

Fog vis <1000m

Mist vis >1000m but <5000m

Question 12

Radiation fog

Answer 12

Land cools at night and cools adjacent air to below dewpoint

Question 13

Advection fog

Answer 13

Warm, moist air moves over cold surface. 15kt ish wind required to move air mass. Anytime, anywhere.