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PPL Canada > PPL Weather > Flashcards

PPL Weather Flashcards

1
Q

Dry adiabatic lapse rate? In degrees

A

3C / 1000ft

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2
Q

Saturated adiabatic lapse rate? In degrees

A

1.5C / 1000ft

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3
Q

High pressure flows clockwise or counterclockwise?

A

Clockwise

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4
Q

low pressure flows clockwise or counterclockwise?

A

Counterclockwise

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5
Q

Sea breeze: day or night? Land to Sea or Sea to Land?

A

Day, Sea to Land.

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6
Q

BKN (Broken) is how many oktas of sky coverage?

A

5 to 7

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7
Q

Symbol and color for warm front

A

Red line with semicircles on one side

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8
Q

elevation: 2,200ft
altimeter setting: 29.42
pressure altitude?

A

2,700ft

PA = 2,200 + 1,000*(29.92-29.42)

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9
Q

What is horizontal visibility of mist?

A

≥ 1,000 meters

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10
Q

What does BR means?

A

BR = Mist (BRuine)
humidity > 80%
visibility > 1,000m

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11
Q

What is absolute humidity?

A

Weight of water vapor per unit volume of air

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12
Q

Is continental air dry or moist?

A

Dry

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13
Q

Is maritime air dry or moist?

A

Moist

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14
Q

Sudden increase in wind speed over a long period of time

A

Squall

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15
Q

During a descent from a height of thousands of feet, win direction will ___ (veer/back) and wind speed will ___ (increase/decrease)

A

Back, decrease

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16
Q

At what altitude do the Lenticular clouds form?

A

20 000 to 40 000 ft

17
Q

What causes Mechanical turbulence?

A

Friction between the air and the ground (and man made structure, trees…)

18
Q

What is convective (Thermal) turbulence

A

Caused by unequal heating of the earth’s surface

19
Q

What clouds indicate convective turbulence?

A

CU, TCU, ACC and CB

20
Q

What is orographic turbulence?

A

air moving up mountains or hills

21
Q

Cite two types of wind shear

A
  • Speed shear (different speed at different altitude)

- Directional shear (different direction at different altitude)

22
Q

Standard Sea Level pressure in millibars

A

1013.2

PPL Canada (4 decks)

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