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M11 new josh > 11.15 oxygen > Flashcards

11.15 oxygen Flashcards

1
Q

the cabin pressurisation system ensure the cabin altitude doesnt exceed what

A

8000ft

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2
Q

what does air consist of

A

78% nitrogen, 21% oxygen, 1% other

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3
Q

as altitude increases what happen to air pressure

A

air pressure decreases

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4
Q

at sea level what is the oxygen pressure in the lungs

A

19.6 hPa

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5
Q

how do we overcome the negative effects of atmospheric pressure in flight

A

increase oxygen pressure, increase quantity of oxygen

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6
Q

what colour are the cylinders painted that stores oxygen

A

green

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7
Q

whats the only type of oxygen suitable for aircraft use

A

aviators breathing oxygen

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8
Q

why is aviators breathing oxygen used on aircraft

A

its very dry

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9
Q

why is medical oxygen not use don aircraft

A

it contains water droplets that will freeze

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10
Q

what are oxygens characteristics

A

colourless, odourless, non-inflammable gas

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11
Q

smoking is not permitted in what distance of oxygen working areas

A

15m

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12
Q

what oxygen systems are used in the flight deck and by the flight crew

A

diluter demand and pressure demand flow systems

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13
Q

what pressure are the high pressure oxygen bottles in the flight deck

A

1850 psi

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14
Q

when is cabin oxygen used

A

only if the cabin depressurises

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15
Q

when does the oxygen system in the cabin automatically activate

A

exceeds 14,000ft

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16
Q

what must oxygen be kept away from

A

oils, greases, flames

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17
Q

whats a SOV on an oxygen bottle

A

shut off valve

18
Q

what pressure safety device do oxygen bottles have

A

disc that breaks over a certain pressure

19
Q

whilst refilling bottles what is there a danger of

A

heat concentration

20
Q

how is oxygen transported to the flight deck

A

through lines and manifolds

21
Q

what 5 types of valve are found in high pressure oxygen systems

A

filler valve, check valve, shut off valve, pressure reducer valve, pressure relief valve

22
Q

what are oxygen shut of valves designed to open

A

slowly

23
Q

what is the use for the portable oxygen bottles

A

emergency or first aid use

24
Q

what 2 types of masks can be used with the portable oxygen

A

full face mask, continuous flow mask

25
Q

when are smoke hoods used

A

when fighting a fire or preventing breathing in smoke

26
Q

when must a oxygen cylinder not be refilled and why

A

if the psi is below 50, moisture may have entered the bottle

27
Q

what is used for leak testing oxygen systems

A

soapy leak check fluid

28
Q

what are the different regulators called that dispense the oxygen

A

continuous flow, demand flow

29
Q

whats the difference between demand and continuous oxygen masks

A

demand only releases oxygen on the inhale, continuous releases oxygen forever even on the exhale

30
Q

what does a diluter-demand type regulator do

A

holds oxygen until the user inhales

31
Q

what aircraft use pressure demand regulators for continuous flow oxygen

A

aircraft that fly above 40,000 ft

32
Q

how long will it take flight crew to put on the full face mask with one hand

A

less than 5 seconds

33
Q

in the oxygen release system what do vent holes allow

A

oxygen to mix with the cabin air

34
Q

what are the 2 ways oxygen is supplied to the cabin mask system

A

chemical or gaseous

35
Q

what are the primary cabin mask chemical oxygen systems

A

portable type, fully integrated type

36
Q

what is the EOC

A

emergency oxygen container

37
Q

what is OBOGS

A

on board oxygen generating system

38
Q

what aircraft is OBOGS usually used on

A

military aircraft

39
Q

what is a FCU

A

flow control unit

40
Q

where are oxygen system blowout discs located

A

fuselage skin

41
Q

what do flow indicators provide

A

indication that oxygen systems are working

M11 new josh (23 decks)

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