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There are two overpressure safety systems to vent oxygen overboard, through a safety port, if the oxygen pressure becomes too high.

Correct! Wrong!

ECAM DOOR/OXY PAGE - REGUL LO PR indication is in amber if oxygen pressure on the low-pressure circuit is low (200 PSI).

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REGUL LO PR indication is in amber if oxygen pressure on the low-pressure circuit is low (50 PSI).

Flight crew oxygen can be turned off from the cockpit.

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A supply solenoid valve allows the flight crew to shut off the distribution system.

Above _____ cabin altitude the flight crew oxygen masks will provide 100% oxygen regardless of the position of the N/100% selector.

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Overpressure supply is automatically started, when cabin altitude exceeds 30 000 ft

Flight crew oxygen is supplied by:

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When the passenger oxygen masks are released, the PA system automatically broadcasts prerecorded instructions for their use.

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To provide a visual indication of a thermal discharge a _____ disk is located on the lower left side of the forward fuselage.

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Cockpit lateral consoles - As soon as the left flap door opens, the mask is supplied with oxygen and, once it closes (mask still supplied with oxygen), the 'OXY ON' flag appears.

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Oxygen masks are located in containers above the passenger seats, in the lavatories, in each galley, and at each cabin crew station.

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If smoke enters the flight crew mask:

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When pressed for a few seconds the EMERGENCY pressure selector creates an overpressure, which eliminates condensation or fogging of the mask, and prevents smoke, smell, or ashes from entering the mask. Turning the knob, in the direction of the arrow, generates a permanent overpressure.

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Passenger oxygen is supplied by:

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The chemical reaction used for oxygen generation creates heat. Therefore, a smell of burning, smoke, and an increase in cabin temperature may be associated with the normal operation of the oxygen generators.

ECAM DOOR/OXY PAGE - When the oxygen pressure indication is in amber, it means that the pressure is greater than, or equal to _____.

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The indication is normally in white. It becomes amber, when the pressure goes below 300 PSI, low oxygen pressure is detected, the overhead panel's OXYGEN CREW SUPPLY pb is OFF.

ECAM DOOR/OXY PAGE - On ground, an amber half frame appears when oxygen pressure is less than _____. In this case, the flight crew must check that the remaining quantity is not below the minimum.

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When does the flow of oxygen begin for the passengers?

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The passenger oxygen mask doors open automatically if the cabin altitude exceeds:

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ECAM DOOR/OXY PAGE - When the oxygen pressure indication is in green, it means that the pressure is greater than, or equal to _____.

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Airbus A330 – Oxygen