ATPL MET EXAM QUESTIONS WITH
CORRECT ANSWERS
Microburst downdraft speed? - Correct Answers -3-4,000 fpm
Why is dry microburst worse than wet? - Correct Answers -Evaporation cools air and
speeds it up = faster
Approximate windspeed of a tornado? - Correct Answers -200kts
Average life span of a tornado? - Correct Answers -Few mins - 30 mins
Average speed a tornado moves over the surface? - Correct Answers -20-40 kts
Three stages of a Tstorm? - Correct Answers -Developing, Mature, Dissipating.
Three types of Tstorm? - Correct Answers -Single cell, multicell, supercell.
What does the relationship between ELR and SALR have to be to allow formation of a
Tstorm? - Correct Answers -ELR > SALR for over 10,000ft
By how many ft should you overfly a TS? - Correct Answers -5,000ft
In visual flight, by how many miles should you avoid a CB tower? - Correct Answers -
10nm
By how many miles should you avoid a CB tower if using a weather radar (the echoes
show the TS Core, not the edges). Answer for all flight levels. - Correct Answers -0 -
FL250 = 10nm
FL250 - 300 = 15nm
FL300+ = 20NM
What are the hazards of a TS? - Correct Answers -Severe Icing
Severe Turbulence
Radio Static
Nav Aid Interference
Pitot/Static Blockages
Lightning usually 5,000ft below to 5,000ft above frzg lvl (+10 degrees to -10 degrees)
Where does a gust front form? - Correct Answers -At the surface, at the forward edge of
a supercell.
, Supercell development characteristics? - Correct Answers -Updraft/downdraft side by
side
Central core isolated from cold (high vertical speeds)
Hail carried aloft
Severe gusts/windshear/gust front
Updraft speed for single cell in the development stage? - Correct Answers -3,000 -
4,000fpm
Downdraft speed for a single cell mature stage? - Correct Answers -3,000 - 4,000fpm
(Up to 6,000fpm for sev. TS)
How long dos the development stage for a single cell TS last? - Correct Answers -15-20
min
What is the typical dimensions of a jetstream? - Correct Answers -1,000nm long, 150nm
wide, 10,000ft deep.
After how long does a TS before it starts to dissipate? - Correct Answers -Typically 2
hours
What dictates the direction a single cell TS in the mature stage moves? - Correct
Answers -In line with the medium level (10,000ft) winds
How long does a single cell TS in the mature stage last for? - Correct Answers -
Typically less than 1 hour
What does a super cell need to form? - Correct Answers -Good supply of warm air &
moisture low level, held down by stable layer so turbulence doesn't disturb energy
before TS triggered.
Change in direction and strengthening of winds aloft to tilt CB tower.
3 types of high cloud and what are they made up of? - Correct Answers -Ci, Cs, Cc
Ice crystals
If a could has formed in stable air, what is it? - Correct Answers -Stratus
If a cloud has formed in unstable air, what is it? - Correct Answers -Cumulus
CORRECT ANSWERS
Microburst downdraft speed? - Correct Answers -3-4,000 fpm
Why is dry microburst worse than wet? - Correct Answers -Evaporation cools air and
speeds it up = faster
Approximate windspeed of a tornado? - Correct Answers -200kts
Average life span of a tornado? - Correct Answers -Few mins - 30 mins
Average speed a tornado moves over the surface? - Correct Answers -20-40 kts
Three stages of a Tstorm? - Correct Answers -Developing, Mature, Dissipating.
Three types of Tstorm? - Correct Answers -Single cell, multicell, supercell.
What does the relationship between ELR and SALR have to be to allow formation of a
Tstorm? - Correct Answers -ELR > SALR for over 10,000ft
By how many ft should you overfly a TS? - Correct Answers -5,000ft
In visual flight, by how many miles should you avoid a CB tower? - Correct Answers -
10nm
By how many miles should you avoid a CB tower if using a weather radar (the echoes
show the TS Core, not the edges). Answer for all flight levels. - Correct Answers -0 -
FL250 = 10nm
FL250 - 300 = 15nm
FL300+ = 20NM
What are the hazards of a TS? - Correct Answers -Severe Icing
Severe Turbulence
Radio Static
Nav Aid Interference
Pitot/Static Blockages
Lightning usually 5,000ft below to 5,000ft above frzg lvl (+10 degrees to -10 degrees)
Where does a gust front form? - Correct Answers -At the surface, at the forward edge of
a supercell.
, Supercell development characteristics? - Correct Answers -Updraft/downdraft side by
side
Central core isolated from cold (high vertical speeds)
Hail carried aloft
Severe gusts/windshear/gust front
Updraft speed for single cell in the development stage? - Correct Answers -3,000 -
4,000fpm
Downdraft speed for a single cell mature stage? - Correct Answers -3,000 - 4,000fpm
(Up to 6,000fpm for sev. TS)
How long dos the development stage for a single cell TS last? - Correct Answers -15-20
min
What is the typical dimensions of a jetstream? - Correct Answers -1,000nm long, 150nm
wide, 10,000ft deep.
After how long does a TS before it starts to dissipate? - Correct Answers -Typically 2
hours
What dictates the direction a single cell TS in the mature stage moves? - Correct
Answers -In line with the medium level (10,000ft) winds
How long does a single cell TS in the mature stage last for? - Correct Answers -
Typically less than 1 hour
What does a super cell need to form? - Correct Answers -Good supply of warm air &
moisture low level, held down by stable layer so turbulence doesn't disturb energy
before TS triggered.
Change in direction and strengthening of winds aloft to tilt CB tower.
3 types of high cloud and what are they made up of? - Correct Answers -Ci, Cs, Cc
Ice crystals
If a could has formed in stable air, what is it? - Correct Answers -Stratus
If a cloud has formed in unstable air, what is it? - Correct Answers -Cumulus
