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TC CPL Written Exam Prep > Meteorology > Flashcards

Meteorology Flashcards

1
Q

Dry adiabatic lapse rate

A

3 degrees per 1000 ft

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2
Q

Saturated adiabatic lapse rate

A

1.5 degrees per 1000 ft

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3
Q

Dew point drop per 1000 ft

A

0.5 degrees

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4
Q

Unsaturated air temp. dew point closure rate

A

2.5 degrees per 1000 feet

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5
Q

How to calculate convective cloud base

A

Use temp/DP closure rate of 2.5 per 1000

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6
Q

How to calculate non-convective cloud base

A

use DALR of 3 per 1000

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7
Q

signs of warm front passage

A

Temp: increases
Pressure: decreases before and decreases slowly after passage
Wind: veers and increases

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8
Q

Type 1 and 4 deicing fluids

A

1: goes on hot with limited holdover
2; Goes on cold after type 1 meant to stop refreezing

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9
Q

DME frequency range

A

UHF

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10
Q

Order of precipitation when flying through a warm front

A

Warm to cold: Rain, freezing rain, ice pellets, snow

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11
Q

Alto/Cirro cloud heights

A

Alto- starts at 6500
Cirro- Starts at 20000

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12
Q

Wind speed required for mountain waves to occur

A

25kts

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13
Q

SCT is reported when there is ____ cloud coverage

A

3/8 to 4/8

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14
Q

Convective cloud spatial coverage codes and % covered

A

ISOLD = 25% or less
OCNL = 26% to 50%
FRQ = 50% or more

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15
Q

Signs of cold front passage

A

Temp - decreases
Pressure - Sharp decrease slightly before passage then increases as front passes
Wind: Veers and increases

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16
Q

GFA minimum winds published

A

Sustained speed of 20 kts
Gusts of 30 kts

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17
Q

FEW is reported when there is _____ cloud coverage

A

1/8 to 2/8

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18
Q

Mist is reported when vis. is _____

A

Equal to or greater than 5/8 SM

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19
Q

How to decode high level FD

A

Subtract 50 from direction, add 100 to speed

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20
Q

Conditions conducive to thunderstorms

A

-Steep lapse rate
-High moisture content
-lifting agent

21
Q

TAF change group TEMPO

A

Temporary change in conditions lasting less than 1 hour

22
Q

GFA forecast alt.

A

Below 24000 (400 mb)

23
Q

BKN is reported when there is ____ cloud coverage

A

5/8 to less than 8/8

24
Q

TAF change group PROB

A

There is a 30 or 40 percent chance that the condition will exist

25
Q

Fog is reported when vis is _____

A

less than 5/8 SM

26
Q

From how far away can you experience mountain waves?

A

150 NM from mountain peak

27
Q

Air mass nomenclature

A

Moisture content:
-Continental = dry
-Maritime = moist
Temperature:
-Arctic = cold
-Polar = cool
-Tropical = warm

28
Q

Upper front passage

A

No change in wind or temp. precipitation will still fall

29
Q

CLR in AWOS report ?
What does AWOS mean?

A

CLR = no cloud below 10000
AWOS = automated weather observation system

30
Q

AWOS vs human reporting

A

AWOS is more accurate except heavy rain or blowing snow cause erroneous readings

31
Q

Standard meridians in Canada

A

AST-60W; EST-75W; CST- 90W; MST-105W; PST-120W

32
Q

What happens to true altitude when temperature decreases

A

True altitude is lower in low temperature (altimeter reads higher)

33
Q

Mountain waves effect on altimeter

A

Increased wind speed in waves cause decrease in pressure. altimeter reads higher (true altitude is lower)

34
Q

Where do rotor clouds form?

A

Near the ridge of mountains

35
Q

What is virga?

A

Falling rain that evaporates before it hits the ground. virga is the strong downdraft that remains

36
Q

Distance to stay away from thunderstorm

A

20 NM

37
Q

Thunderstorm stages

A

Developing - updrafts only
Mature - Updrafts and downdrafts/heavy rain/
Dissipating - Downdrafts only/rain

38
Q

Carburetor icing highest risk temperature

A

-5 to +15

39
Q

range control on airborne weather radar

A

Adjusts how far forward the pilot can see ahead of the aircraft but it does not change the amount of radar energy being transmitted.

40
Q

Where does convergence happen

A

Center of a low

41
Q

Freezing level line spacing on GFA

A

2500’ Intervals

42
Q

How does frontal fog form `

A

Precipitation falls from warm air mass into cold ai mass

43
Q

Upper level chart heights and hPa

A

850 hPa - 5000’
700 hPa - 10000’
500 hPa - 18000’
250 hPa - 34000’

44
Q

Upper level chart contour spacing

A

60 meters (120 on 250 hPa chart)

45
Q

When are winds reported as VRB

A

Less than 3 knots and variable direction

or stronger winds which direction is impossible to determine

46
Q

Issue frequency of upper level and surface charts

A

0000Z and 1200Z (twice/day)

47
Q

What does XX mean on upper level chart?

A

Cloud base is below forecast altitude

48
Q

What is steam fog

A

Water vapor being introduced into cold air

49
Q

Upper front on GFA symbol

A

normal front but unshaded

TC CPL Written Exam Prep (6 decks)

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