The Need For Oxygen On Aircraft

Question 1

Air we inhale is made up of what?

Answer 1

78% nitrogen

21% Oxygen

1% traces of other gasses

Question 2

Insufficient amount of oxygen leads to ?

Answer 2

Hypoxia

Question 3

Hypoxia effects

Answer 3

Loss of night vision
Apprehension
Euphoria
False sense of well being
Death

Question 4

Air supply required up to 10,000ft

Answer 4

Ambient cabin air

Question 5

Supply needed at 10,000 to 33,000ft

Answer 5

Progressive increase in oxygen content of the oxy/air mix

Question 6

Supply required at 33,000ft to 38,000ft

Answer 6

100% oxygen

Question 7

Oxygen supply needed at 38,000ft +

Answer 7

100% oxygen and pressure breathing

Question 8

Characteristics of oxygen

Answer 8

Colourless odourless and tasteless, also extremely active chemically

Question 9

Pros of gaseous oxygen

Answer 9

Ease of handling and available at vast majority of airports used

Question 10

Liquid oxygen characteristics

Answer 10

Pale blue in colour, vaporises at -183C at normal atmospheric pressure.

Expansion ratio in 7 times greater than gaseous oxygen stored at 1800 psi

Question 11

Chemical or solid oxygen use

Answer 11

Mostly emergency or rare occasions

Question 12

What is - On Board Oxygen Generation System (OBOGS) ?

Answer 12

Procedure for producing oxygen is its extraction from the air by a mechanical process, air is passed through and the nitrogen is trapped as oxygen passes through