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Interview Technical Questions > Met (See Met Revision Too Multi Eng) > Flashcards

Met (See Met Revision Too Multi Eng) Flashcards

1
Q

Specific heat capacity

A

Ability of a material to hold thermal/heat energy

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2
Q

3 factors that affect earths surface temp

A

Latitude, season and time of day

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3
Q

What is Total air temp (TAT)

A

Product of SAT (which is basically OAT) and ram rise (compression of air on probe)

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4
Q

What is the SALR

A

Temp change for a saturated air particle when cooled to its dew points, 1.5deg/1000ft

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5
Q

4 main groups of cloud

A

Curriform, cumiliform, stratiform, nimbus

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6
Q

3 layers of cloud and their bases

A

Low level = below 6500ft

Alto (med) level = greater than 6500ft

Cirro (high) level = greater than 16500 to 20000ft

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7
Q

How do lenticular clouds form

A

When orographic uplift causes air to rise and cool adiabatically and once cooled, produces cloud

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8
Q

Different stability of air type effect on lenticular clouds

A

Stable air = lenticular on hillside

Unstable air = cumulus or CBs

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9
Q

How does radiation fog form and what is needed

A

When no cloud at night so ground cools air above and it condenses

Need moist air and wind below 8kt

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10
Q

What 2 things does Virga show

A

Inversion and potential WS

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11
Q

Height of instability needed for thunderstorm

A

ELR has to be greater than SALR, and over 10000ft

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12
Q

How is turbulence shown on significant weather chart

A
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13
Q

How is icing shown sig weather chart

A
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14
Q

Thunderstorm symbol sig weather charts w

A
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15
Q

What do thunderstorms on sig weather chart imply

A

Hail, mod or severe turbulence and icing

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16
Q

What does a convergence line look like on surface pressure chart

A
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17
Q

Effects of windshear

A

Handling issues, flight path deviations, airspeed loss

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18
Q

What are the only two times wind is measured form magnetic north

A

ATC/ATIS and upper wind charts

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19
Q

What is the geostrophic wind and what height is it found

A

Westerly airflow parallel to isobars with LP on left and is proportional to isobar at 2000ft+

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20
Q

Gradient winds

A

Blow around isobars at low to medium heights approx 2000ft

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21
Q

Where is the 2 common jet streams

A

Polar front 60lat and inter tropical front (sub tropical meet tropical air)

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22
Q

What air mass is the jetstream in

A

Warm air mass

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23
Q

Where is most of the CAT in a jetstream

A

Warm air but on the cold polar side, level or just above the core

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24
Q

What happens to surface wind direction and speed when descending

A

Backs and slows due to friction layer

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25
Q

Wind variation day and night, land and sea

A
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26
Q

Trade winds characteristics and direction

A

15kts at surface up to 10,000ft NE in NH and SE in SH

27
Q

Sea breeze

A

Higher Pressure over land due to heating, so moves over sea, and air over sea moves over land

Opposite for night

28
Q

4 types of depression

A

-orographic
-frontal
-thermal
-tropcial

29
Q

Why is warm front slower

A

As it has to pass over denser cold front- geostrophic forced used vertically and horizontally to overcome (2/3rds)

30
Q

Shallow on metar

A

MI

31
Q

Patches on metar

A

BC

32
Q

Low drifting on metar

A

DR

33
Q

Blowing on metar

A

BL

34
Q

Ice pellets on metar

A

PL

35
Q

Small hail metar

A

GS

36
Q

Normal hail metar

A

GR

37
Q

Unknown precipitation metar

A

UP

38
Q

Spray on metar

A

PY

39
Q

Dust devils (dust/sand whirls) metar

A

PO

40
Q

Funnel cloud metar

A

FC

41
Q

Tornado or water spout metar

A

+FC

42
Q

Few okta scale

A

1-2

43
Q

Scattered okta scale

A

3-4

44
Q

Broken okta scale

A

5-7

45
Q

Overcast okta scale

A

8

46
Q

What is a convergence line

A

It is the formation of cloud due to wind from two directions meeting and rising

47
Q

Weather associated with a convergence line

A

A band of cloud that remains fairly stationary and can produce large amounts of rain across a relatively small area

48
Q

Dust

A

DU

49
Q

Dust storm

A

DS

50
Q

Mist

A

BR

51
Q

What weather expected with warm occlusion

A

Winter = rain, sleet, snow

Summer = heavy rain

52
Q

What weather expected with cold occlusions

A

Winter = heavy snowfall

Summer =CBs, heavy rain and downpours

53
Q

ISA deviation and altimeter error

A

For every 1deg deviation from ISA, the altimeter is 4ft wrong for every 1000ft

54
Q

What spheres can mountain waves form

A

Stratosphere and troposphere

55
Q

Wind speed for mountain waves

A

Increase with height within a stable layer above the hill (perpendicular to ridge, speed increasing )

56
Q

CB cell full cycle time length

A

2-3hrs

57
Q

When does hoar frost occur

A

When a/c is in sub zero clear air and suddenly enters warmer moist region

58
Q

Microburst time length and area

A

5 min across 5km

59
Q

Movement of a thunderstorm is associated with what

A

Wind at 10,000ft

60
Q

What happens when air from air mass moves to a lower latitude

A

Surface air warms, humidity falls and instability increases

61
Q

Large CU, temp of -20, amount the droplet will freeze is

A

1/4 of the droplet

62
Q

Polar front position January

A

Florida to SW England (35deg to 65deg)

63
Q

What does a secondary depression form alongside

A

Polar front low

64
Q

What is a thermal depression

A

Where the land is heated faster than water, creating instability. Large land masses in summer

Interview Technical Questions (11 decks)

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