Air Density

Question 1

Density can be expressed as the following formula:

Density =

Answer 1

mass / volume (g/m3)

Question 2

The five factors which affect air density:

Answer 2

1 Pressure

2 Temperature

3 Humidity

4 Height

5 Latitude

Question 3

Density decreases with height at an average of -

Answer 3

10% per 3000ft

Question 4

Density decreases at latitudes which are -

Answer 4

high. Low pressure, high temperature.

Question 5

For every 1 degree Celsius above ISA standard temperature -

Answer 5

120ft must be added to pressure altitude

Question 6

Performance related:

High density altitudes reduce both -

Answer 6

lift and power generated by the engine

Question 7

Explain density altitude:

Answer 7

Density altitude is that altitude when the pressure altitude is corrected for non-standard(ISA) temperature. An approximate correction of 118.8 feet may be added to the pressure altitude for every 1 degree above the ISA temperature for that altitude.