PSTAR Aviation Weather and Meteorology

Question 1

What weather phenomenon is associated with a rapidly rising cumulus cloud with a dark base and anvil-shaped top?

Accepted Answer

Cumulonimbus

Answer

A cumulonimbus cloud with an anvil-shaped top indicates a fully developed thunderstorm with severe hazards to aviation.

Question 2

What is the primary cause of wind shear near the ground?

Accepted Answer

Temperature inversion

Answer

A temperature inversion traps cold air near the ground and creates a sharp boundary where wind speed and direction can change dramatically.

Question 3

What is the dewpoint?

Accepted Answer

The temperature at which air becomes saturated and condensation begins

Answer

The dewpoint is the temperature at which air becomes saturated (100% relative humidity), causing condensation or fog to form.

Question 4

What type of fog forms when warm, moist air moves over a cooler surface?

Accepted Answer

Advection fog

Answer

Advection fog forms when warm, moist air is transported horizontally over a cooler surface, cooling the air to its dewpoint.

Question 5

What wind condition is associated with a mountain wave?

Accepted Answer

Strong winds blowing perpendicular to a mountain ridge

Answer

Mountain waves form when strong winds blow perpendicular (across) a mountain ridge, creating wave oscillations on the leeward side.

PSTAR - Pre Solo Test of Air Regulation Practice Test