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Airbus A320 > Oxygen > Flashcards

Oxygen Flashcards

1
Q

What does the oxygen system consist of ?

A
  • cockpit-fixed oxygen system
  • cabin-fixed oxygen system
  • portable oxygen system
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2
Q

Who does supply the cockpit-fixed oxygen system ?

A

It supplies breathing oxygen to the cockpit occupants in case of smoke or depressurisation

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3
Q

Who does supply the cabin-fixed oxygen system ?

A

It supplies oxygen to the cabin occupants (crew and pax) in case of depressurisation

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4
Q

Who does supply the portable oxygen system ?

A

It supplies both cockpit and cabin occupants and to be used as a protection for crew during on board emergencies or for FIRST AID purposes

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5
Q

What is the purpose of the pressure regulator ?

A

Directly attached to the oxygen bottle, the pressure regulator converts bottled high pressure oxygen to low pressure oxygen suitable for crew

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6
Q

What is the purpose of the safety relief valve ?

A

It limits the pressure delivered to the crew

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7
Q

What is the maximum capacity of the flight crew oxygen bottle ?

A

1850 PSI

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8
Q

How many masks are there in the flight deck ?

A

3 (4 in option)

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9
Q

What is the maximum pressure in the oxygen bottle before the frangible disk discharges the content overboard ?

A

2500 PSI

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10
Q

What happens when there is on overpressure in the system ?

A

A frangible disk located upstream of the pressure regulator discharges the content of the bottle overboard via on overboard vent and through a green blowout disc, located underneath captain’s window.

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11
Q

What is the purpose of the green disk visible outside ?

A

To check if there is any issue, overpressure or bottle discharged in the oxygen system

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12
Q

What is the purpose of the emergency selector on the mask ?

A

It creates an overpressure in the mask, which eliminates condensation in the mask, and prevents smoke, smells or ashes from entering the mask

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13
Q

At what cabin pressure altitude is the overpressure automatically started in the mask ?

A

30 000 ft

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14
Q

What are the 2 positions on the mask ?

A

NORMAL and 100%

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15
Q

What is the NORMAL position on the mask ?

A

Pilots breathe a mixture of oxygen and cabin air.

Mixture change with altitude. The higher the cabin, the more oxygen the mask provides.

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16
Q

What is the 100% on the mask ?

A

The mask delivers 100% of oxygen, regardless of altitude

17
Q

When is the oxygen pressure displayed in green on the ECAM ?

A

When pressure > 800 PSI ( > 500 PSI for NEO)

18
Q

When does the oxygen pressure pulse in green on the ECAM ?

A

When pressure < 800 PSI ( < 500 PSI for NEO)

19
Q

When is the oxygen pressure displayed in amber on the ECAM ?

A

When pressure < 400 PSI ( < 200 PSI for NEO)

20
Q

What does an amber half box on the oxygen pressure on the ECAM ?

A

When pressure < 1500 PSI ( < 800 PSI for NEO)

21
Q

When is the REGUL LO PR displayed in amber on the ECAM ?

A

When pressure in the LP circuit is low (50 PSI)

22
Q

When is the CKPT OXY displayed in amber on the ECAM ?

A
  • When pressure < 400 PSI ( < 200 PSI for NEO)
  • Low oxygen pressure is detected
  • The CREW SUPPLY pb is OFF
23
Q

Does the cabin oxygen system protect from inhaling smoke or sustaining high altitude ?

A

NO

24
Q

How is produced oxygen in the cabin ?

A

It is produced through chemical generators above the passengers seats, lavatories and galleys.H

25
Q

How long can the cabin system provide oxygen ?

A

15 minutes

26
Q

At what altitude do the masks latch ?

A

Cabin pressure altitude of 14 000 ft

27
Q

What is the use of the MAK MAN ON pb ?

A

To override the automatic system.

It does NOT activate oxygen flow. Passengers must pull the mask to start the flow.

28
Q

What is the particularity of the chemical reaction ?

A

It creates heat and as a result, it can emit burning smell.
This is normal !

29
Q

How long can the portable oxygen system provide oxygen ?

A

15 minutes

Airbus A320 (22 decks)

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