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EGK Systems > Oxygen > Flashcards

Oxygen Flashcards

1
Q

Supply Of Oxygen To Crew is from

A

Gaseous oxygen

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2
Q

Supply of oxygen to passengers

A

Chemically generated from gas generators above seats
15-20 minute oxygen supply

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3
Q

Automatic deployment of oxygen is at

A

Excess cabin altitude of 15,000ft

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4
Q

Crew oxygen supply pressures

A

Stored at 1800 psi
Reduced to 80-100psi before distribution
8 psi at mask

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5
Q

Diluted Demand Oxygen Regulator

A

Mixes oxygen and cabin air to supply the correct ratio according to altitude

Also referred to a pressure demand oxygen system

Each member of crew has a regulator

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6
Q

Chemical Generator System

A

Contains mixture of sodium chlorate and iron powders in steel cylinder

Uses electrically operated firing mechanism

Masks automatically eject from PSU by mechanism controlled by Mario metric unit

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7
Q

How many masks should be supplied for flight

A

10% more outlets than seat

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8
Q

PulseOx System

A

Individual gaseous oxygen cylinders at each PSU

Controls flow from cylinder according to sensed demand from passengers

+ saves weight

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9
Q

Portable Oxygen - Normal Flow/High flow duration/capacity

A

Normal flow - 2 litres a minute
High flow - 4 litres a min

1800psi/120 litres capacity

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10
Q

Aviation oxygen bottles are what colour

A

Black or green
Marked AV02

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11
Q

Continuous flow oxygen system

A

Continuously independent of users demand or cabin altitude

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12
Q

EMERGENCY selected on diluted demand system will give

A

100% oxygen continues flow at positive pressure

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13
Q

Normal Operation of diluted demand regulator

A

Diluted oxygen supplied to mask

Oxygen mix increases up until cabin altitude of 32,000ft where 100% is supplied

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14
Q

Replenishment of onboard oxygen bottles must be done with

A

Engine off due to oxygen igniting more easily and burn far more rapidly.

Remove all sources of ignition

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15
Q

Smoke hood

A

Covers the whole head
Chemical air regeneration system
Supply constant flow of oxygen for 12/15 minutes

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16
Q

Smoke mask

A

Gaseous 02 with mask and googles

17
Q

Emergency knob on flight crew mask provides

A

Continuous flow of 100% oxygen at positive pressure

18
Q

Why are gaseous systems used in cockpit over chemical

A

Can be switched on and off/higher capacity

19
Q

Selection of 100% on diluted demand oxygen mask

A

Gives 100% oxygen on demand

20
Q

Operation of the oxygen system is indicated by

A

Flow indicators

21
Q

Colour of oxygen cylinders

A

Green

22
Q

Purpose of pressure relief valves in high pressure gaseous oxygen system

A

Relieve over pressure if the pressure reducing valve malfunctions

23
Q

What happens when oil or grease mixes with oxygen

A

Catch fire spontaneously in presence of oxygen

EGK Systems (15 decks)

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