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Oxygen Systems Flashcards

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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

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A

pressure demand

24
Q

How is the face form of the 12/P constructed

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A

silicone is injected into hardshell to make 1 face peice

25
When fitting a mask, what should you do if a crew members face length is borderline
pick most comfortable fit
26
How do you clean the valve assembly
swashing operational portion in alcohol
27
When do you preform operational check of mask?
pre/post flight and every 30 days
28
What type of protection does PBE provide
eye protection in oxygen deficient, smoke filled, or toxic environment
29
What is the min. duration of oxygen supply available when using the PBE
15 min 3.5 psi
30
What type inspections are required on PBE
upon issue and every 30 days
31
How long will the supply of oxygen last when using an emergency oxygen assembly
approximately 10 min.
32
What are three common types of emergency oxygen cylinder assemblies
MD-1, H-2, REDAR-K46-01
33
Approximately how much does the cylinder pressure drop for each degree below 70 F
3.5 psi
34
What occurs once the anti smoke goggles vent valve is manually pulled
oxygen bleeds out purging smoke
35
Who determines the frequency of dissassembly for the quick don mask
MAJCOM
36
How long after cleaning is the quick don oxygen valve required to dry at room temperature
15-20 min
37
What causes the density of the atmosphere to rise and fall
altitude
38
The pressure exerted by the atmosphere is greater
near the surface
39
What is the max psi charge of a low pressure oxygen storage cylinder
450
40
The continuous flow oxygen system provides sufficient oxygen for flights up to a max altitude of how may feet
30,000
41
The demand oxygen system provides sufficient oxygen for a max of how may feet
35,000
42
How many ways are there to provide sufficient pressure in the lungs to force oxygen into the blood
2
43
What type of manifold block is the CRU-60/P
3 way
44
Where does disconnect from the aircraft oxygen supply hose connector take place on the 60/P connector during ejection
lower intake port
45
How often is an inspection done on the 60/P
30 days
46
What is the max length that the excess restraint chord can be after being trimmed when it is replaced in the 60/P connector
1/4 in
47
How many lbs should the friction disconnect force be when checking the 60/P oxygen regulator to the mask connection
12-20 lbs
48
What is the max SCCM leakage rate allowed during the low range leak test of the 60/P
2500
49
How many liters of oxygen are contained in the single oxygen cylinder within the emergency oxygen passenger system (EPOS)
18
50
What is the purpose of the breathing valves located in the valve body of the passenger oxygen mask
provide and anchor for the head strap
51
What is the max number of days between inspection intervals for passenger oxygen masks that are used in non fixed environments
90
52
The individual harness adjustment straps are attached to the MBU-12/P oxygen mask with what
capped T nuts and a self locking screw
53
How long is the MBU-12/P oxygen mask hose
17.5 in
54
What type of cord is used to tack the buckles on the MBU-12/P
type IVB, 8/4 double waxed
55
What prevents oxygen from being released accidentally from the emergency oxygen assembly
caution tag with pin
56
The Scott 358 series folding quick don mask assembly is secured to the wearer's face with what
a spring loaded telescopic mounts on a suspension assembly

V 2 (11 decks)

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