Air Pressure and Density Altitude Concepts

The video tutorial explains the concepts of pressure and density altitude and their impact on aircraft performance. It covers how pressure, altitude, temperature, and humidity affect air density and, consequently, aircraft performance. The tutorial also provides methods to calculate pressure and density altitude, using charts and examples to illustrate the process.

What happens to air molecules when the air pressure is low?

• They spread out.

• They become more tightly packed.

• They become heavier.

• They move faster.

How does high altitude affect aircraft performance?

• Has no effect on performance.

• Increases performance due to more air molecules.

• Improves performance due to higher pressure.

• Decreases performance due to lower pressure.

What is the effect of high humidity on air density?

• Increases air density.

• Decreases air density.

• Has no effect on air density.

• Makes air molecules heavier.

What is pressure altitude?

• Altitude at which the aircraft performs best.

• Altitude corrected for humidity.

• Altitude indicated when the altimeter is set to 29.92.

• True altitude corrected for non-standard temperature.

How does a decrease in pressure affect density altitude?

• It stabilizes density altitude.

• It increases density altitude.

• It has no effect on density altitude.

• It decreases density altitude.

What is density altitude?

• Altitude corrected for humidity.

• Pressure altitude corrected for non-standard temperature.

• Altitude at which the aircraft is most efficient.

• True altitude corrected for non-standard pressure.

What is the first step in calculating pressure altitude?

• Finding the conversion factor for the altimeter setting.

• Measuring the humidity.

• Finding the temperature.

• Calculating the true altitude.

How do you find the conversion factor for an altimeter setting not listed on the chart?

• Use a standard conversion factor.

• Interpolate between the two closest settings.

• Use the closest lower setting.

• Use the closest higher setting.

What is the effect of a 15-degree Fahrenheit increase on density altitude?

• Has no effect on density altitude.

• Increases density altitude by 1,000 feet.

• Decreases density altitude by 1,000 feet.

• Decreases density altitude by 500 feet.

What is the final step in determining density altitude from a chart?

• Subtract the conversion factor from the field elevation.

• Add the conversion factor to the field elevation.

• Find the temperature at the bottom of the chart.

• Move to the left and read the density altitude.