Overview

Question 1

When is the wind speed coded as VRB ?

Answer 1

When the wind speed is 3knots or less and when the wind direction is is more than 60 degrees or more but less than 180

Question 2

If the wind direction has a variation of 180 degrees or more and has speed faster than 3 knots what will it be coded as?

Answer 2

VRB

Question 3

How would you code winds greater than 99kts?

Answer 3

P99

Question 4

What is minimum visibility

Answer 4

When the visibility is less than 1500m or less50% if the prevailing vis in one direction.

Question 5

When the visibility is less than 800m is should be rounded to?

Answer 5

The nearest 50m

Question 6

When the visibility is 800m or more but less than 5000m rounded down to?

Answer 6

The nearest 100m

Question 7

When the visibility is 5000m or more the visibility shall be rounded to

Answer 7

The nearest 1000m.

Question 8

When the visibility is less than 50m how shall it be encoded?

Answer 8

0000

Question 9

How shall a visibility of 50m be encoded?

Answer 9

0050

Question 10

How shall a visibility of 10km be encoded?

Answer 10

9999

Question 11

When is the RVR reported?

Answer 11

When the visibility is less than 1500m

Question 12

When the RVR is less than 50m how shall is be reported?

Answer 12

M0050

Question 13

How many figures shall be are used to report the visibility?

Answer 13

4 figures even for RVRs.

Question 14

When th RVR value is greater than 2000m how shall it be reported?

Answer 14

P2000

Question 15

When the RVR is less than 400m is shall be rounded to the nearest?

Answer 15

25m

Question 16

When the RVR is between 400-800m it shall be rounded down to?

Answer 16

50m

Question 17

When the RVR is greater than 800m it shall be rounded to the nearest?

Answer 17

100m

Question 18

How should different types of precipitation occuring at the same time be reported?

Answer 18

As one single group

Question 19

The dominant type of precipitation should be reported first and preceded by only one intensity qualifier which refers to the intensity not total precipitation.

Answer 19

True

Question 20

What does this symbol mean -

Answer 20

Light

Question 21

What does this symbol mean +

Answer 21

Heavy

Question 22

What does VC mean?

Answer 22

In the vicinity

Question 23

How would you code Fog in the vicinity?

Answer 23

VCFG

Question 24

How would you code sleet?

Answer 24

RASN or SNRA whichever precipitation is more dominant

Question 25

What are the conditions for fog to be reported?

Answer 25

Visibility less than 1000m and relative humidity at or near 100%

Question 26

Code for hail

Answer 26

GR

Question 27

What is the code for small hail?

Answer 27

GS

Question 28

What is the difference between hail and small hail?

Answer 28

Hail has a diameter of 5mm whilst small hail’s is less.

Question 29

What are the conditions for haze?

Answer 29

Relative humidity is less than 95% and the difference between temperature is usually greater than 1 degree

Question 30

Conditions for mist?

Answer 30

Vis between 1000-5000m relative humidity is 95% or higher and difference between temp and dewpoint is usually 1 degree or less.

Question 31

Code for partial

Answer 31

PR

Question 32

Code for patches

Answer 32

BC

Question 33

Code for snow grains

Answer 33

SG

Question 34

What does NSC mean?

Answer 34

No cloud below 5000ft