Oxygen

Question 1

418. The aircraft has separate oxygen bottles for crew and passengers. How are the bottles connected and serviced?

Answer 1

Through a common line.

Question 2

419. What’s the location of oxygen service panel?

Answer 2

Right side of aircraft opposite the main door.

Question 3

420. When does overboard discharge occur?

Answer 3

High pressure or high temperature.

Question 4

421. Where are oxygen control panels located?

Answer 4

On flight deck: one controls oxygen to cockpit and one controls oxygen to passengers.

Question 5

422. At what cabin altitude do passenger masks automatically deploy?

Answer 5

When sensed cabin altitude reaches approximately 14,750 feet with HIGH ALT switch in normal and approximately 15,750 feet with HIGH ALT switch selected (i.e., lighted).

Question 6

423. What kind of test is performed with the PRESS TO TEST AND RESET control switch on oxygen mask storage box?

Answer 6

Leak check

Question 7

424. What would indicate a leak in the oxygen system while pressing and holding the PRESS TO TEST AND RESET control switch?

Answer 7

Blinker remains yellow

Question 8

425. When mask is removed from storage container, what activates the shutoff valve?

Answer 8

The open doors

Question 9

426. How is mask microphone activated?

Answer 9

By selecting MIC knob on COMM JACKS panel to MASK.

Question 10

427. What’s the differenc

Answer 10

In NORMAL, you get diluted oxygen and with 100% selected, you get undiluted oxygen.

Question 11

428. What’s the difference between selections of NORMAL (fully counterclockwise) and EMERGENCY (fully clockwise)?

Answer 11

In NORMAL, it allows regulator to provide diluter-demand flow, and in EMERGENCY position, it sets regulator to provide constant pressure of undiluted oxygen.

Question 12

429. How can tension in mask harness be adjusted to make it more comfortable?

Answer 12

By using comfort toggle on front of mask: it has two stops.

Question 13

430. What action must passengers perform to get oxygen to flow into passenger mask retaining bag?

Answer 13

Pull on lanyard to remove flow pin.

Question 14

431. The crewmember Protective Breathing Equipment (PBE) is a self-contained, portable, personal breathing device designed to safeguard the wearer from the effects of smoke, carbon dioxide, harmful gases, and oxygen deficiency whilemanaging in-flight fire, smoke or fume emergencies. How many are on the aircraft?

Answer 14

Two: one installed in flight deck and the other is installed in vicinity of baggage compartment.