M11.15

Question 1

What is the international standard atmosphere temperature?

Answer 1

15°c

Question 2

What is the international standard atmosphere air pressure?

Answer 2

1013.25 hectopascals

Question 3

Air consist of what percentages?

Answer 3

• 78% nitrogen
• 21% oxygen
• 1% inert gases

Question 4

What type of oxygen is used in aircraft?

Answer 4

Aviators oxygen

Question 5

What are oxygen cyclinders made from?

Answer 5

Steel alloy or composites

Question 6

What pressure is oxygen stored at?

Answer 6

1850psi

Question 7

What is the maximum capacity of a oxygen cylinder?

Answer 7

3,200 litres

Question 8

What does oxygen pressure vary with?

Answer 8

Temperature

Question 9

When will the safety disk break on an oxygen cylinder?

Answer 9

2,600psi

Question 10

What indicates if there has been a oxygen cylinder over pressure?

Answer 10

The green disk will have broken

Question 11

At what pressure should oxygen bottles not be refilled and why?

Answer 11

50 psi because moisture has entered

Question 12

Where would you find the oxygen pressure in the flight deck?

Answer 12

On the doors/oxygen page on the ECAM

Question 13

What does it mean when the flow indicator is blinking on the oxygen stowage box?

Answer 13

Oxygen is flowing

Question 14

What are the two red grips used for on the oxygen face mask?

Answer 14

To inflate and deflate with oxygen to give a tight fit

Question 15

What are the three modes of the diluter demand regulator for oxygen masks?

Answer 15

• normal
• 100% oxygen
• emergency

Question 16

What happens in the normal mode from the diluter demand regulator?

Answer 16

It gives a mixture of air and oxygen up to 35,000 feet

Question 17

What happens in the 100% oxygen mode from the diluter demand regulator?

Answer 17

The user receives 100% oxygen

Question 18

What happens in the emergency mode from the diluter demand regulator?

Answer 18

The masks gives constant oxygen flowing (breathing out becomes uncomfortable)

Question 19

What altitude does the oxygen masks deploy when there is a depressurisation?

Answer 19

14,000ft

Question 20

Where are oxygen masks located?

Answer 20

At every seat, lavatory, and attendant station

Question 21

Why is there always more masks than seats in a row?

Answer 21

Just in case of there being a child

Question 22

What happens if the oxygen masks fail to deploy?

Answer 22

There is a manual switch in the flight deck

Question 23

What are the two ways that oxygen is supplied to the system?

Answer 23

• chemical system

- gaseous system

Question 24

When oxygen masks drop they do not supply oxygen straight away, Why is this?

Answer 24

Because the user must pull the lanyard to break the pin on the oxygen generator

Question 25

What are the oxygen generators filled with?

Answer 25

Sodium chlorate and iron powder

Question 26

How is oxygen generated in a the oxygen masks?

Answer 26

It mixes sodium chlorate and iron powder which consumes less oxygen than created

Question 27

What is used to absorb the left over chlorine from the oxygen generators?

Answer 27

Barium peroxide (BaO2)

Question 28

How long does the oxygen generators supply oxygen for?

Answer 28

12-15minutes

Question 29

What is used in the gaseous system?

Answer 29

Oxygen bottles

Question 30

When are smoke hoods used?

Answer 30

When fighting fires or to prevent breathing in smoke or noxious gases