First Half Weather Effects Exit Ticket

What is the standard sea level pressure?

• 29.92°C

• 1,013.2 millibars

• 59°F

• 1,013.2°C

What does rising atmospheric pressure generally indicate?

• Bad weather is approaching

• Fair weather is approaching

• Increasing humidity

• A decrease in air density

How is atmospheric pressure used by unmanned aircraft?

• To measure air density

• To determine altitude with an altimeter

• To predict wind shear

• To measure humidity

What effect does a decrease in air density have on aircraft performance?

• Performance improves

• Performance decreases

• Performance remains unchanged

• Performance improves in humid air only

Why does increasing humidity decrease air density?

• Humid air is denser than dry air

• Water vapor has a lower molecular weight than oxygen and nitrogen

• Water vapor adds more mass to the air

• Humid air replaces oxygen and nitrogen with heavier gases

What does a high-density altitude indicate?

• Improved aircraft performance

• Reduced air density and decreased aircraft performance

• Decreased air density but improved aircraft performance

• Low altitude flying conditions

What is the formula for calculating density altitude?

• Pressure altitude + (120 × (outside air temperature – standard temperature))

• Altimeter reading + (50 × (altitude – air pressure))

• Wind speed – (100 × (air pressure – altitude))

• Pressure altitude – air temperature

What is the standard temperature at sea level?

• 29.92°F

• 1,013.2°C

• 15°C

• 59°C

How can wind speed near obstacles affect drone operations?

• It smooths out turbulence

• It creates wind gusts with rapid changes in direction and speed

• It prevents the drone from flying near the ground

• It improves picture quality

Why should operators be cautious when flying near open fields and water features?

• Wind speed may increase due to lack of obstacles

• Wind speed will decrease due to water absorption

• Wind turbulence is lower in these areas

• Obstacles create safer flight conditions