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V 2 > Oxygen Systems > Flashcards

Oxygen Systems Flashcards

1
Q

What is the total pressure of atmospheric air at sea level

A

14.70 psi or 760 mm HG

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2
Q

What causes physical problems when you go higher in altitude

A

gasses in body and changes in atmospheric pressur

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3
Q

What causes hypoxia

A

lack of O2 in body tissue

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4
Q

What causes an individual to have the bends

A

nitrogen bubbles around large body joints

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5
Q

What is the normal charge for high pressure oxygen storage cylinders

A

1800-1850 PSI

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6
Q

Up to what altitude does the demand oxygen system deliver oxygen

A

up to 35,000 feet

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7
Q

At what altitude does the requirement for pressure demand equipment start

A

above 35,000 feet

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8
Q

What is the limit of continuous flow oxygen systems

A

30,000 feet

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9
Q

What is the purpose of the 180 degree disconnect swing on the CRU-60/P

A

to allow straight pull disconnect during ejection

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10
Q

Why does the E O2 port on the CRU-60/P swivel

A

to receive the supply connector from above or below

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11
Q

Why is the CRU-60/P equipped with an anti suffocation valve

A

to warn when disconnected from O2

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12
Q

Normally, how often do you preform a leak test on oxygen connector CRU-60/P

A

30 days

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13
Q

What is the first thing you check during the 60/P’s inspection

A

emergency oxygen inlet fitting is screwed on the elbow tight

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14
Q

What are the three lubricants approved to be applied on the O ring of the 60/P

A

krytox, braycote, halocarbon

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15
Q

What do you adjust the restraing chord to

A

1-7/16in +- 1/16

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16
Q

How much force is required to disconnect the male friction connector in the oxygen regulator from the mask connection

A

12-20 lbs

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17
Q

What is the maximum allowable leakage when testing the connectors

A

250 SCCM

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18
Q

EPOS is good up to what temperature

A

1832F or 1000C

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19
Q

Lithium hydroxide panels hold CO2 build up in the EPOS hood to what percentage

A

4% or lower

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20
Q

How does the passenger oxygen mask function

A

as a modified continuous flow system with reservoir bag

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21
Q

During exhalation cycle where is incoming oxygen stored

A

reservoir bag

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22
Q

What is involved in the visual inspection of the passenger oxygen mask

A
  • check face peice for holes, cuts, tares, ect.
  • check valves for damage and proper operation
  • check resivor bag for damage or imperfection
  • check tubing for cremp marks, damage, and kinks
  • check headstrap for distortion, elasticity, and clenliness
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23
Q

What type of oxygen mask is the MBU-12/P

A

pressure demand

24
Q

How is the face form of the 12/P constructed

A

silicone is injected into hardshell to make 1 face peice

25
Q

When fitting a mask, what should you do if a crew members face length is borderline

A

pick most comfortable fit

26
Q

How do you clean the valve assembly

A

swashing operational portion in alcohol

27
Q

When do you preform operational check of mask?

A

pre/post flight and every 30 days

28
Q

What type of protection does PBE provide

A

eye protection in oxygen deficient, smoke filled, or toxic environment

29
Q

What is the min. duration of oxygen supply available when using the PBE

A

15 min 3.5 psi

30
Q

What type inspections are required on PBE

A

upon issue and every 30 days

31
Q

How long will the supply of oxygen last when using an emergency oxygen assembly

A

approximately 10 min.

32
Q

What are three common types of emergency oxygen cylinder assemblies

A

MD-1, H-2, REDAR-K46-01

33
Q

Approximately how much does the cylinder pressure drop for each degree below 70 F

A

3.5 psi

34
Q

What occurs once the anti smoke goggles vent valve is manually pulled

A

oxygen bleeds out purging smoke

35
Q

Who determines the frequency of dissassembly for the quick don mask

A

MAJCOM

36
Q

How long after cleaning is the quick don oxygen valve required to dry at room temperature

A

15-20 min

37
Q

What causes the density of the atmosphere to rise and fall

A

altitude

38
Q

The pressure exerted by the atmosphere is greater

A

near the surface

39
Q

What is the max psi charge of a low pressure oxygen storage cylinder

A

450

40
Q

The continuous flow oxygen system provides sufficient oxygen for flights up to a max altitude of how may feet

A

30,000

41
Q

The demand oxygen system provides sufficient oxygen for a max of how may feet

A

35,000

42
Q

How many ways are there to provide sufficient pressure in the lungs to force oxygen into the blood

A

2

43
Q

What type of manifold block is the CRU-60/P

A

3 way

44
Q

Where does disconnect from the aircraft oxygen supply hose connector take place on the 60/P connector during ejection

A

lower intake port

45
Q

How often is an inspection done on the 60/P

A

30 days

46
Q

What is the max length that the excess restraint chord can be after being trimmed when it is replaced in the 60/P connector

A

1/4 in

47
Q

How many lbs should the friction disconnect force be when checking the 60/P oxygen regulator to the mask connection

A

12-20 lbs

48
Q

What is the max SCCM leakage rate allowed during the low range leak test of the 60/P

A

2500

49
Q

How many liters of oxygen are contained in the single oxygen cylinder within the emergency oxygen passenger system (EPOS)

A

18

50
Q

What is the purpose of the breathing valves located in the valve body of the passenger oxygen mask

A

provide and anchor for the head strap

51
Q

What is the max number of days between inspection intervals for passenger oxygen masks that are used in non fixed environments

A

90

52
Q

The individual harness adjustment straps are attached to the MBU-12/P oxygen mask with what

A

capped T nuts and a self locking screw

53
Q

How long is the MBU-12/P oxygen mask hose

A

17.5 in

54
Q

What type of cord is used to tack the buckles on the MBU-12/P

A

type IVB, 8/4 double waxed

55
Q

What prevents oxygen from being released accidentally from the emergency oxygen assembly

A

caution tag with pin

56
Q

The Scott 358 series folding quick don mask assembly is secured to the wearer’s face with what

A

a spring loaded telescopic mounts on a suspension assembly

V 2 (11 decks)

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