SIFT SIFT Aviation Weather and Navigation Questions and Answers 3

Question 1

What is the purpose of a TAF (Terminal Aerodrome Forecast)?

Accepted Answer

To provide a weather forecast for the area around a specific airport, valid for 24–30 hours

Answer

A TAF is an official forecast of expected weather conditions at a specific airport terminal area, typically covering a 24–30 hour period in a standardized coded format.

Question 2

Which type of turbulence is caused by mechanical disruption of airflow as wind passes over irregular terrain such as hills or ridgelines?

Accepted Answer

Mechanical turbulence

Answer

Mechanical turbulence results from the physical disruption of wind flow by surface obstacles like hills, buildings, or trees, creating eddies and unpredictable air movements.

Question 3

On a sectional aeronautical chart, what color is used to depict Class D controlled airspace around smaller airports with operating control towers?

Accepted Answer

Blue

Answer

Class D airspace is depicted on sectional charts with a dashed blue boundary line encircling the airport, typically extending to 2,500 feet AGL.

Question 4

In Army aviation navigation, what does a magnetic compass primarily measure?

Accepted Answer

The horizontal component of the Earth's magnetic field to indicate direction

Answer

A magnetic compass aligns with the horizontal component of Earth's magnetic field, providing the pilot with a magnetic heading reference.

Question 5

Which condition describes a temperature inversion, and why is it relevant to Army aviators?

Accepted Answer

Temperature increasing with altitude instead of decreasing, which can trap fog and reduce visibility near the surface

Answer

A temperature inversion reverses the normal lapse rate, creating a stable layer that traps moisture and pollutants, often producing persistent low-level fog, haze, or stratus that severely limits visibility.

SIFT Exam Practice Test

SIFT Exam Practice Test

SIFT SIFT Aviation Weather and Navigation Questions and Answers 3