Basic 3 Flashcards

1
Q

list the types of visibility

A

Flight visibility
Slant visibility
Ground visibility
(Ground contact)

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2
Q

how is RVR measured?

A

with transmissometer

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3
Q

FU

A

smoke

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4
Q

DU

A

widespread dust

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5
Q

SA

A

sand

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6
Q

MIFG

A

shallow fog <2m AGL

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7
Q

BLSN

A

blowing snow >2m AGL

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8
Q

DRSN

A

drifting snow <2m AGL

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9
Q

definition and conditions for a thunderstorm

A

Thunderstorms are cumulonimbus clouds with lighting or thunder
conditions: high reaching moist unstable air, sufficient moisture in the lower troposphere, freezing level in the cloud

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10
Q

List the types of thunderstorms

A
  • Air mass thunderstorms
  • Frontal thunderstorms
  • Orographic thunderstorms
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11
Q

Life cycle of a thunderstorm

A
  • Cumulus stage
  • Mature stage
  • Dissipating stage
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12
Q

Structural icing during flight

A

Structural icing during flight occurs at the protruding edges of an aircraft, and it happens when the temperature of the aircraft is below 0 degrees C and when there is supercooled water in the atmosphere

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13
Q

List the types of icing

A
  • Rime ice
  • Clear ice
  • Mixed ice
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14
Q

List icing effects on flight control

A

higher weight, more drag, reduced lift, reduced thrust, higher stalling speed

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15
Q

intensity of icing

A

the intensity of icing is higher in cumuliform clouds than in stratiform clouds. The worst icing conditions are met at flight levels just above the freezing level. Light aircraft and helicopters are more vulnerable to icing than jet airplanes flying at cruising speed

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16
Q

List atmospheric situations with turbulence

A
  • Turbulence in the surface friction layer
  • Thermal convection
  • Orographically induced turbulence
  • Clear air turbulence
  • Wake turbulence
17
Q

List effects of wind shear on aircraft

A
  • Airspeed drop shear

- Airspeed rise shear

18
Q

list weather situations associated with wind shear

A
  • Inversion close to the surface/low level jet
  • Wind shear at fronts
  • Orographically induced wind shear
  • Microburst
19
Q

Microburst,macroburst

A

microburst for diameters <4km
macroburst for diameters >4km
microburst consists of: downburst, outburst, gusts front or squall and wind shear zones

20
Q

wind shear definition

A

wind shear is a change in speed and/or direction of horizontal winds

21
Q

tornado definiton

A

tornado is produced when cool air overrides a layer of warm air, forcing the warm air to rise rapidly