Oxygen System

Question 1

Hypoxia

Answer 1

Insufficient oxygen

Question 2

Time of Useful Consciousness

Answer 2

35 000 ft 30 to 90 seconds

40 000 ft 15 to 20 seconds

Question 3

emergency oxygen

Answer 3

• if the cabin pressure altitude exceeds 13 000 ft x 30 minutes
• hazardous fumes enter the flight deck
• the Cp altitude exceeds 15 000 ft, all the passengers with 02, above 14 000 ft 30% and 10 000 ft 10% of pax

Question 4

type of mask

Answer 4

• crew Gaseous oxygen systems are generally of the diluter demand is stored in High Pressure gaseous
• pax the continuous flow is stored HP gas or be chemically generated

Question 5

Unpressurize aircraft

Answer 5

oxygen equipment will be installed for the use of passengers and crew if the aircraft is to fly above 10 000 ft with portable oxygen if there is not fix

Question 6

EROS - Emengency Regulating Oxygen System

Answer 6

use only for crew member, can give mixture or 100% of 02 on demand. all aircraft that have a maximum operating altitude above 25 000 ft.

Question 7

Chemical O2 generator

Answer 7

is a light self-contained devices and are located in each pax cabin attendants and lavatory O2 is generated by the chemical reaction and supply for descent in emergency conditions (min of 15 mins). Once the chemical reaction has started, it cannot be stopped. Surface temperatures of the generator can reach 232°C

Question 8

portable oxygen

Answer 8

First aid and sustaining portable oxygen cylinders are installed at suitable locations in the passenger cabin. They consist of a cylinder containing normally 120 litres of oxygen at a pressure of 1800 psi

Question 9

crew portable oxygen or smike hood

Answer 9

Standard portable O bottles can be used by the crew to enable them to move about the cabin during reduced cabin pressure or smoke it can produce oxygen for
15 minutes once initiated.

Question 10

crew mask

Answer 10

can deliver 100% 02 at continous flow at positive pressure (3 Atm) to seal the mask and avoid smoke enter

Question 11

crew oxygen

Answer 11

Normally consists of a diluter demand system with oxygen stored in high pressure gaseous form(1800 psi).
• The pure O is mixed with cabin air in order to save oxygen and prevent physiological side effects.
o 100% Pure is provided at 33,000 ft
o Below FL330 aneroid controller mix O and cabin air

Question 12

Setting avaible for EROS

Answer 12

o Normal– Automatically mixed as req.
o 100% - Pure oxygen provided
o EMER 100% pure oxygen provided at an overpressure to prevent inhalation of fumes etc.

Question 13

oxigen for passenger

Answer 13

masks are stowed in the pax service units (PSU), the doors, will open automatically by a barometrically controlled release mechanism if the cabin altitude reaches 14 000 ft or manual select from the flight deck

Question 14

release for passenger

Answer 14

• electrically for the chemical generator system

- pneumatically for the gaseous system.