Chapter 2

Question 1

What is the air made of?

Answer 1

78% Nitrogen, 21% oxygen and 1% other gases as carbodioxide and methane.

Question 2

What is static pressure?

Answer 2

The amount of mass that you have on top of your head (or/of any object). That’s why e.g. your ears hurt.

Question 3

When you are at a high altitude, what happen with the air pressure?

Answer 3

It is low.

Question 4

How does STATIC PRESSURE act?

Answer 4

In all directions.

Question 5

When humidity increases, what happen to air density?

Answer 5

It decreases.

Question 6

What are the ISA conditions at mean sea level (amsl)?

Answer 6

+15 ºC , 1013,25 hPA and 1225kg/m3

Question 7

How does DYNAMIC PRESSURE act?

Answer 7

In one direction.

Question 8

What is the maximum temperature for an aircraft to take off?

Answer 8

52ºC ground temp.

Question 9

What is the minimum temperature for an aircraft to take off?

Answer 9

-40ºC. Otherwise fuel would freeze.

Question 10

What is the temperature lapse rate?

Answer 10

1.98ºC (sometimes rounded up 2ºC) per 1000ft up to the tropopause at 36 089 ft (11km).

Question 11

What is the temperature of the tropopause?

Answer 11

-56.5ºC

Question 12

What are the different types of airspeed? iceT

Answer 12

IAS : Indicated Air Speed - (120 kts)

CAS: Calibrated Air Speed - We correct for 2 types of errors: instrument and positional errors.

EAS: Equivalent Air Speed - We correct for compressibility (from incomprensible to compresible)

TAS: True Air Speed - Real speed of molecules wising by.

Question 13

Which one of the different types of airspeed is the most accurate?

Answer 13

EAS