11.15

Question 1

What does the air consist of ?

Answer 1

78% nitrogen
21% oxygen ‘
1% inert gas

Question 2

What is hypoxia ?

Answer 2

Sluggish condition of the mind and body caused by insufficient oxygen

Question 3

When aircraft is air cruise, what altitude Is the cabin pressure set at ?

Answer 3

8,000ft

Question 4

What colour are aviation oxygen cylinders ?

Answer 4

Green

Question 5

Why is medical oxygen never used on aircraft?

Answer 5

Contains water droplets and freezes

Question 6

Why is technical oxygen not used on aircraft’s ?

Answer 6

Contains contaminants not suitable for breathing

Question 7

Is oxygen flammable ?

Answer 7

No

Question 8

How many psi is stored in a high-pressure oxygen bottle ?

Answer 8

1850pi

Question 9

Where are the oxygen bottles located for the flight crew ?

Answer 9

Avionics compartment or cargo compartment

Question 10

Whats the function of a pressure regulator valve in an oxygen bottle ?

Answer 10

Drops pressure coming out of bottle from “1850psi” to “25psi”.

Question 11

Whats the inference between continuous oxygen flow and demand oxygen flow ?

Answer 11

Continuous - oxygen always being supplied through mask at a constant flow

Demand - oxygen only goes through mask when you inhale. These types last longer

Question 12

Why does the disc burst on the top of the cylinder when the pressure becomes to high ?

Answer 12

Prevents major damage to oxygen components

Question 13

What happens if there is a discharge in oxygen from the cylinder ?

Answer 13

Green disc ruptures on aircraft skin which shows it has been discharged

Question 14

What is a thermal compensator ?

Answer 14

Compensates the heat build up

Question 15

What is placed on the plastic tube which carries the oxygen from the cylinder to the masks ?

Answer 15

Colour coded tape to identify its “ BREATHING OXYGEN “ and has to be placed at specific intervals

Question 16

Where are the oxygen cylinders located for the cabin ?

Answer 16

Cargo compartment

Question 17

What does the pressure regulator valve do ?

Answer 17

Controls amount of PSI is passed through mask

Question 18

Where is the pressure indicator gauge found ?

Answer 18

Near the filler port

Question 19

Where are the cabin masks found ?

Answer 19

PSU
( passenger service unit )

( there will be spare masks on every row of seat for infants )

Question 20

How else can the cabin chemical oxygen be supplied other than cylinders ?

Answer 20

Oxygen generator

Question 21

Whats the two ways oxygen is supplied to the system ?

Answer 21

Gas
Chemical

Question 22

What does the gas oxygen system use to reduce thee oxygen to a useable level ?

Answer 22

FCU

Question 23

What connects every passenger service unit ( PSU ) to the flow control units ( FCU ) ?

Answer 23

Ring line which transports pressure and releases the PSU doors to allow the mask to fall

Question 24

How is the oxygen activated in the cabin once the masks are deployed ?

Answer 24

Activated when mask is pulled down towards passenger

Question 25

How is the oxygen generated in a chemical oxygen system ?

Answer 25

By pulling lanyard it releases pin and fires a striker which triggers chemical reaction

Question 26

When generator is used, can it be repaired ?

Answer 26

No. It has to be replaced

Question 27

Whats the difference between a FCU and oxygen generator ?

Answer 27

FCU - used for gaseous oxygen to deploy masks and carry the oxygen to PSU.

Generator - used for chemical oxygen to deploy masks and form chemical reaction to deliver oxygen to PSU

Question 28

What mask is used for cockpit crew ?

Answer 28

Demand