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M11 > 11.15 Oxygen > Flashcards

11.15 Oxygen Flashcards

1
Q

What does air consist of?

A

. 78% nitrogen
. 21% oxygen
. 1% inhert gases

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2
Q

As altitude increase what happens to air pressure and density?

A

As altitude increases, air pressure decreases and so does density of air

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3
Q

At 10000ft Humans can compensate for lack of oxygen by?

A

Breathing faster

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4
Q

What feet would you start feeling effects of altitude?

A

14000ft start feeling ill

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5
Q

What feet would you be completely compensated for altitude sickness?

A

15000ft

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6
Q

What are the three types of oxygen?

A

. Aviators
. Medical oxygen
. Technical oxygen

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7
Q

Out of the three types of oxygen which type can be used in aircraft?

A

Aviators as it is dry

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8
Q

What does medical oxygen contain that makes it unable to be used in aircraft?

A

Water so may freeze

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9
Q

What does technical oxygen contain that makes it unable to be used in aircraft?

A

Contaminated

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10
Q

What should you ensure when working with oxygen systems?

A

Wash your hands,
Be free of oil

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11
Q

Who does the crew oxygen system supply to?

A

Only cockpit crew, one or more bottles

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12
Q

What colour is oxygen bottle?

A

Dark green

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13
Q

Attached to each bottle is a what?

A

Pressure regulator
Feed o2 inti distribution components

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14
Q

What is maximum capacity of 02 in a bottle?

A

3200 litres

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15
Q

What pressure is 02 stored at?

A

1850 PSI

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16
Q

If temperature or pressure of bottle gets too high what bursts, preventing major damage?

A

Green Safety disk at 2600 PSI

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17
Q

If the bottle reads less than 50 PSI what should you do?

A

Must not be refilled as moisture may have entered cylinder
. Remove it and return it to workshop

18
Q

When refilling the bottle there is a danger or heat concentration, what helps prevent this?

A

Thermal compensator

19
Q

When 02 pressure is displayed on ECAM/ EICAS what are the two colours for sufficent and low pressure?

A

Green = good
Amber = low pressure

20
Q

In the cockpit how many oxygen masks are there?

A

4
2 for pilots
2 for observers

21
Q

What are the two functions of the mask storage box?

A

. Storage
. Press to rest and test

22
Q

How quickly can flight crew put their masks on?

A

With one hand in less than 5 seconds

23
Q

What must you do before repressurising 02 barrels?

A

Check temperature

24
Q

On flight crew mask what does the mask cover?

A

. Eyes
. Nose
. Mouth

25
Q

What are the three modes of the oxygen mask?

A

. Normal
. 100% oxygen
. Emergency

26
Q

At what altitude will passenger o2 systems activate automatically?

A

14000 feet

27
Q

There is an 02 mask for everyone, where else are the masks available?

A

Every seat, lavatories and every attendant station

28
Q

What precaution is in place because children may be sharing a seat with an adult?

A

At least one spare mask than there are seats in a row

29
Q

If automatic activation switch fails, what can you do?

A

The pilot manually activates it in the cockpit

30
Q

After passenger system has been activated, what must you do?

A

Rest it by pushing reset button in cockpit

31
Q

For maintenance purposes wha5 is in place to prevent the whole system activating?

A

Special tool for opening single stowage boxes

32
Q

After activation and deployment of system, what needs to happen?

A

Repacked away manually by hand

33
Q

What are the two ways oxygen can be supplied to the system?

A

. Chemical system
. Gaseous system

34
Q

In a chemical oxygen generator, of the side of the canister changes colour, what does it mean?

A

Generator has been used and must be replaced

35
Q

In a gaseous system there is no oxygen flow until?

A

Until masks are pulled and at least one lanyard is tightened which pulls a pin to activate.

36
Q

What is the main drawback from gaseous oxygen system?

A

On large aircraft there is a t8me delay suppling oxygen to passengers who are located a long way from o2 bottles

37
Q

In a gaseous system where is the oxygen supplied from?

A

o2 bottles

38
Q

What is the intended use of portable oxygen systems?

A

Emergency and first aid

39
Q

Where is portable oxygen normally stored?

A

In cockpit and near exits in passenger compartment

40
Q

What are the two types of masks used with portable o2 cylinders?

A

. One is a full face mask
. One is a continuous flow o2 mask (first aid)

41
Q

How is oxygen pressure indicated on a bottle?

A

By a direct reading gauge

M11 (41 decks)

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