CGI Weather & Meteorology 2

Question 1

Which pressure system is typically associated with clear, stable weather?

Accepted Answer

High pressure (anticyclone)

Answer

High pressure systems cause air to sink and diverge, suppressing cloud formation and producing clear, stable weather.

Question 2

What is the dew point spread, and why is it significant to pilots?

Accepted Answer

The difference between temperature and dew point; small spreads indicate fog or cloud formation risk

Answer

The temperature-dew point spread indicates how close the air is to saturation; a spread of 5°F or less signals high fog or cloud risk.

Question 3

Where is wind shear most likely to be encountered near a thunderstorm?

Accepted Answer

Near the surface directly below the storm and at all altitudes within 20 NM

Answer

Wind shear associated with thunderstorms can occur near the surface under the storm and within approximately 20 NM of the cell at any altitude.

Question 4

What type of icing is the most hazardous to aircraft?

Accepted Answer

Clear (glaze) ice

Answer

Clear ice is most hazardous because it forms rapidly, is heavy, adheres strongly, and is difficult to remove from airfoil surfaces.

Question 5

A pilot observes a rapidly falling barometric pressure. What does this typically indicate?

Accepted Answer

Approaching low-pressure system with deteriorating weather

Answer

A rapid fall in barometric pressure indicates an approaching low-pressure system, often bringing deteriorating weather and precipitation.

CGI - Certified Ground Instructor Practice Test