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Met > Previous Exam Questions > Flashcards

Previous Exam Questions Flashcards

1
Q

Max height of a CB in km and ft

A

12km
40,0000
But can stretch up to

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2
Q

Worst area for CAT in the vicinity of the polar jet stream is normally located

A

On the depression side

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3
Q

Typical visibility in heavy rain

A

Around 100m (poss 50)

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4
Q

Location of the roaring 40s

A

40-50s

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5
Q

Hurricane average in the Atlantic

A

12 (around 10)

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6
Q

Temp of the tropopause at 20km

A

-100

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7
Q

What will clear orographic fog

A

Change in the airflow

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8
Q

How tropical cyclones form east of Darwin each year

A

2

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9
Q

Who prepares a SIGMET

A

A meteorological watch office

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10
Q

How is water vapour content distributed

A

0g/m3 near the poles

25g/m3

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11
Q

How often is windshear reported

A

Every min

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12
Q

Satellites with the highest resolution

A

Polar orbiting

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13
Q

Describe a routine air report and a special air report

A

AIREP is a routine report

PIREP is a special air report

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14
Q

Satellite closest to earth

A

Polar orbiting

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15
Q

Weather reported in a special air report

A

Ts, without hail that are obscured, embedded and widespread

(Not isolated CBs) heavy dust and sandstorms, volcanic ash cloud

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16
Q

Visibility range for a heavy sandstorm

A

200m

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17
Q

Characteristics of a cold air pool

A

Cold air at altitude and in abnormal locations

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18
Q

Weather to expect from a cold air pool

A

Snow showers

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19
Q

Can the katabatic effect cause a valley inversion

A

Yes

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20
Q

What to do when flying through cirrus clouds to min the effect of ice crystal icing

A

Monitor for power fluctuations

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21
Q

Cloud above the tropopause

A

Noctiluscent cloud in mesosphere
CBs
Overshooting tops

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22
Q

Movement associated with a stationary front

A

Direction of straight isobars, <5kts

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23
Q

Climate between 30 to 50 degrees

A

Temperate

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24
Q

Conditions required for a mountain wave

A

Speed in excess of 20kts at mountain top, wind direction perpendicular to the range, stable conditions at the peak

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25
Q

Number of TRS in E Australia

A

9

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26
Q

Slope of a cold front

A

1:80

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27
Q

Mixing ratio in tropical and polar air masses

A

Tropical 25g/kg

Polar 0g/kg

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28
Q

Temp of a saturated parcel of air cools what happens to RH

A

Stays at 100%

29
Q

Chart for identifying the subtropical jet stream

A

200hpa/39,000ft

30
Q

How many volts are created by a lighting strike

A

200-500kv

2,000 ts active around the globe at one time creating 100 lighting strikes per second

They will create a 500kv charge travelling through the ionosphere

31
Q

For a 3 hour flight what is most useful pieces of met info

A

TAF valid at eta, SIGWX valid for eta, SIGMET valid for eta, current METAR inc trend, NOTAM

32
Q

Max height of steam fog

A

Around 500ft

33
Q

Speed of movement of a warm front

A

10kts

34
Q

Tc air mass originates

A

South of France

35
Q

Most likely to dissipate orographic fog

A

Down-sloping wind

36
Q

Where do lightening strikes occur most frequently

A

Between CB and the ground

37
Q

When to expect lee lows

A

Wind blowing north to south of an east to west ridge line

38
Q

Best way to measure and identify CB cloud

A

IR and visual

39
Q

In what conditions is the lowest useable FL safely at or above TA

A

Qnh greater than 1013 and temp greater than isa

40
Q

Expected duration of amid latitude depression

A

Less than 4 days

41
Q

Visibility in warm air mass

A

5-10km

42
Q

What does white IR indicate

A

Cold temps so high cloud and visual indicates density

43
Q

In mixed cloud ice particles are formed at the expense of

A

SCWD

44
Q

Greatest potential difference found in a TS

A

Between the surface of the earth and the tops of the ts clouds as well and between different parts of the same cloud

45
Q

What causes a global variation in the distribution of electrical charges in the ionosphere at the 500KV

A

Distribution of TS

46
Q

Cold air pool is characterised by

A

Topographic depression filled with cold air

47
Q

Height of steam fog

A

Less than 500ft

48
Q

A secondary depression is frequently observed where?

A

On a cold front

49
Q

Ground radar will detect

A

Rain and its intensity

50
Q

Where is precipitation observed on a quasi stationary front

A

It is widespread in the cold air and there is slight precipitation along the front

51
Q

What Harvard is evident with virga

A

Cold air downdrafts due to evaporation

52
Q

What has the strongest effect on climatology

A

Differential ocean heating an currents above ENSO

53
Q

Diameter of a TRS

A

500km

54
Q

What satellite imagery is used for the tops of cumulus clouds

A

Infrared

55
Q

Role of the MWO

A

Prepare warnings of hazardous weather conditions and issue warnings for windshear in the climbout and approach paths

56
Q

9999

A

10km or greater

57
Q

How is lightning formed

A

Electrical potential belong generated between the earths surface and the clouds

58
Q

What is the distance and vertical extent of MTW

A

300nm and up to the tropopause

59
Q

How long does a PFD take to build and its average duration

A

1-2 days and lasts for 3-4

60
Q

Direction of sunrise

A

East and sets in the west

61
Q

AIRMET

A

Low level warnings

62
Q

Tropical rain climate

A

10* N and S

63
Q

Savannah

A

10 to 25*, 1 wet season

64
Q

Arid subtropical

A

20 to 35*, warm and dry

65
Q

Warm temperate

A

Between 35 and 40* warm dry summers, cool dry winters due to PFD

66
Q

Cool temperate

A

40 to 65* wet and windy, mostly effected by PFD

67
Q

Boreal zone

A

40 and 60, in-between cold temperate and polar, biggest temperature variations

68
Q

Polar

A

65 and 90, mostly frozen tundra with a mean temp below +10 throughout the year

Met (11 decks)

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