Hazardous Weather

Question 1

What is considered IFR condtitions at an airport?

Answer 1

Ceiling less than 1000 feet and/or

visibility less than 3 miles

Question 2

What causes most low visibilities?

Answer 2

Fog

Question 3

What non-water hazards can cause low visibility?

Answer 3

Haze, Smoke, Blowing Dust, Blowing Sand, Volcanic Ash

Question 4

Name 3 types of weather advisories.

Answer 4

AIRMET, SIGMET, CWA (center weather advisory)

Question 5

What is turbulence?

Answer 5

Irregular or disturbed flow of air. Causes abrupt jolts and bumps.

Question 6

Name types of turbulence.

Answer 6

Convective, Mechanical, Clear Air, Wind Shear, Downburst

Question 7

Name the 4 intensities of turbulence.

Answer 7

Light, Moderate, Severe, Extreme

Question 8

What causes mechanical turbulence?

Answer 8

Wind going over or around an obstruction (mountain, building)

Question 9

What is clear air turbulence?

Answer 9

Patchy turbulence near the jet stream

Question 10

What is convective turbulence?

Answer 10

Air movement produced by uneven heating

Question 11

What is wind shear?

Answer 11

Change in wind speed and/or direction in a short distance

Question 12

What is a downburst?

Answer 12

Strong downdraft less than 5 NM wide. Microburst if less than 2.5 NM.
Macroburst if over 2.5 NM.

Question 13

What are the three types of icing?

Answer 13

Clear, rime, mixed

Question 14

What is clear icing, what does it do to the aircraft?

Answer 14

Clear smooth glassy ice. Accumulates rapidly, difficult to remove, heavy.

Question 15

What is rime icing, what does it do to the aircraft?

Answer 15

Coarse, milky, irregular shaped ice. Easy to remove, distorts airfoil shape.

Question 16

What is mixed icing, what does it do to the aircraft?

Answer 16

Mixture of clear and rime ice. Accumulates very rapidly, worst features of clear and rime.

Question 17

Beyond wings what other problems does icing cause?

Answer 17

Clog flow of air to engine, clog flow of fuel to engine, clog flow of air to instruments

Question 18

What are the 4 intensity levels of icing?

Answer 18

Trace, Light, Moderate, Severe

Question 19

What hazards are common in thunderstorms?

Answer 19

Heavy rain, Hail, Strong gusty winds, turbulence, downbursts, low visibility, tornado

Question 20

What are the 3 types of thunderstorms?

Answer 20

Singlecell, multicell, supercell

Question 21

What are common hazards of hurricanes?

Answer 21

Deep low pressure, thunderstorms, tornadoes, strong winds