Chapter 4 - Atmosphere Density

Question 1

What is density

Answer 1

Concentration of molecules in a volume of air

Question 2

Low density does what

Answer 2

reduces a/c performance

Question 3

What happens to Density if Px increases

Answer 3

increases

Question 4

What happens to Density if Temp increases

Answer 4

Decreases because Px overrides

Question 5

What happens to Density if Humidity increases

Answer 5

Decreases because the water molecules muscle out the air ones

Question 6

75 % - height
50 % - height
25 % - height

Answer 6

10,000 feet
22,000 feet
40,000 feet

Question 7

Least favourable conditions are

Answer 7

High altitude
High Temp
High Humidity

Question 8

Density correction is

Answer 8

1 degree / 120ft = density correction

Question 9

If it’s colder than ISA what do we expect density to be?

Answer 9

Greater than ISA so subtract the LR for correct level