7.7: Wind Shear

Question 1

Where does wind shear occur?

A. Only at higher altitudes.
B. Only at lower altitudes.
C. At all altitudes, in all directions.

Answer 1

At all altitudes, in all directions.

Question 2

A pilot can expect a wind-shear zone in a temperature inversion whenever the wind speed at 2,000 to 4,000 feet above the surface is at least

A. 10 knots.
B. 15 knots.
C. 25 knots.

Answer 2

25 knots.

Question 3

When may hazardous wind shear be expected?

A. When stable air crosses a mountain barrier where it tends to flow in layers forming lenticular clouds.
B. In areas of low-level temperature inversion, frontal zones, and clear air turbulence.
C. Following frontal passage when stratocumulus clouds form indicating mechanical mixing.

Answer 3

In areas of low-level temperature inversion, frontal zones, and clear air turbulence.