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Maintain Aircraft Oxygen Systems Flashcards | StudBud
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Maintain Aircraft Oxygen Systems
Maintain Aircraft Oxygen Systems
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1
What are some hazards when handling LDBO?
Very high expansion rate of 860:1
Extremely low temperature will cause cryogenic burns
Violently supports combustion
Static charge can cause major burns
2
What are the two major physical advantages of Liquid Dry Breathing Oxygen (LDBO) system over the GDBO system?
50% Lighter
80% less space required
70% lighter
40% Less Space Required
3
What are the system types of Dry Breathing Oxygen (GDBO)?
High Pressure
Biological
Chemical
Low Pressure
4
What is Hypoxia?
Lack of Oxygen
Severe Lack of Oxygen
Brain Damage
Type of Chicken Pox
5
Carbon Monoxide is a by-product of combustion reactions
False
True
6
What is the Partial Pressure of Oxygen at 18,000ft?
3 x Speed of Sound
About half the normal intake
18,000
About quarter the normal intake
7
What is purged during the purging process?
Moisture
Odours
Solid, liquid and gaseous contaminants
Bugs
8
After replacing the fitting or component of the oxygen system a replenished and leak checked is to be carried out.
False
True
9
What is incorporated to remove any traces of liquid oxygen and to warm the gaseous oxygen to a breathable temperature?
Transceiver
Temperature Controller
Heat Exchange Unit
LDBO Converter
10
Care must be taken once a chemical generator has been activated as they can generate temperatures of up to... (2)
500°F
600°F
360°C
260°C
11
What reduces the high supply pressure to a pressure that is suitable for the regulator?
Pressure Reducing Valve
Demand function
Flow Controller
Bending the hose
12
What involves pressurising the cylinder to pressure with water and checking changes in the cylinder’s overall volume?
Continuous Flow Test
Demand/ Dilution Check
Hydraulic Stretch Test
Hydraulic Leak Check
13
Liquid Dry Breathing Oxygen (LDBO) has an extremely high expansion rate of 860:1
True
False
14
What are filters usually made from?
Silicon Foam
Lox
Sintered Aluminium
Sintered Bronze
15
What is missing from the High-Pressure System below?
Oxygen Regulator
Filter
Line Valve
Pressure Reducing Valve
16
What is missing in the Low Pressure Block Diagram?
Filter/ Contents Gauge
LDBO Regulator
Return Valve
Contents Gauge/ Oxygen Regulator
17
Tape, rags, or paper is used to close openings created by removal of components.
True
False
18
What are the Common types of regulators include?
Diluter/pressure demand
Demand
Continuous Flow
Oxygen Pressure Regulator
19
What are the two functions of diluter demand/pressure demand regulator?
Continuous Flow
Deflation
Dilution
Demand
20
Oxygen Tools are periodically cleaned and degreased as detailed in?
AAP 7002.023
AAP 7212.001-2-8
Modifications Orders
AAP 7055.001-99
21
When the EMERGENCY Function is selected, what opens allowing flow of oxygen, under pressure, to the regulator outlet?
Flow Indicator
Check Valve
Demand Valve
Safety Pressure Valve
22
What is used to speed up the flow of oxygen in the outlet area of the regulator?
Flange Funnell
Diaphragm
Ace Venturi
Venturi
23
When does Liquid Dry Breathing Oxygen (LDBO) boils/condenses?
-183 degrees
180 degrees
-260 degrees
-183 Kelvin
24
What PSI does Airborne low-pressure oxygen cylinders?
425-450 PSI
100-200 PSI
4.25-4.50 PSI
310-360 PSI
25
What is the earth’s atmosphere comprised of?
Air
Oxygen 30%, Nitrogen 55%, Water Vapour 1-5% etc
Nitrogen 20%, Oxygen 78%, Water Vapour 1-2% etc.
Oxygen 20%, Nitrogen 78%, Water Vapour 1-2% etc.
26
What is a severe form of hypoxia where physical damage occurs to the body as a result of the prolonged lack of oxygen?
Carbon Monoxide Poisoning
Death
Anoxia
Dyslexia
27
What is missing from the Chemical Oxygen System below?
Tapered Candle
Fire Cracker
Oxygen Generator
Oxygen Cylinder
28
What colour are High Pressure Cylinders?
Yellow
Green
Lilac
Blue
29
EHP transport cylinders are not to be discharged below...
100 PSI
5000 PSI
500 PSI
0 PSI
30
What is the Blood's Oxygen Carrier?
Dactylion
Haemoglobin
Lungs
Hallux
31
What controls the rate of breathing?
Altitude Training
Canthus
Carbon Dioxide (CO2)
Haemoglobin
32
What must be ensured on a mask to ensure correct delivery of the oxygen/air mixture?
Look down the mask and check for FOD
Air Tight Seal
Purge and seal before use
Must have a beard
33
What happens when any flow of oxygen goes through the overboard discharge indicator?
Error will occur
Oxygen will combust violently
Line Valve Closes
Dislodged Disc
34
What is a cabin usually pressurised and maintained at?
10,000ft
8,000ft
80,000ft
8,000kg
35
Tools used for oxygen maintenance are not to be painted.
True
False
36
What are the advantages of the chemical oxygen system over the gaseous systems?
Reduced fire hazard
Reliability
Low Maintenance
Lesser Leaks
37
What displays the pressure remaining in the cylinders?
Cabin Pressure Indicator
Atmospheric Pressure Indicator
Oxygen Depletion Gauge
Contents Gauge
38
What Function has been selected below?
Emergency
100% Oxygen
Normal
Test
39
What is the lowest discharge pressure allowed for EHP Cylinders?
10 PSI
0 PSI
500 PSI
Doesn't matter
40
What are the Three Modes of a Basic LDBO System?
Build-Up Mode
Control Mode
Supply Mode
Fill Mode
41
What contracts in the First Reduction Chamber?
Aneroid Capsule
Lever
Balloon
Bellows
42
What are Chemical Oxygen Systems used for?
Canopy Launcher
Emergency Supply of Oxygen
Continuous Flow Passenger Unit
Regular Oxygen Demand System
43
What is the disadvantage of using the Continuous Flow Regulator?
Expensive
Unreliable
Heavier Weight
Waste of Oxygen
44
What provides additional protection against over-pressurisation of the converter and supply lines of the system?
Deflation System
Outflow Valve
System relief valve
Supply Protection Device
45
What are Continuous Flow Regulators used for?
Testing
Light Aircraft
Mask filtering
Passenger Emergency Oxygen System on Large Aircraft
46
What is by definition simply a matter of breathing too rapidly?
Inflation
Hyperventilation
Proventilation
Hypoventilation
47
What is designed to store and convert liquid oxygen into gaseous oxygen for use by the aircrew during flight?
GDBO Converter
Oxygen Conversion System
LDBO converter
Cylinder Converter
48
Tubings are flared type only
True
False
49
What publications are relevant to the removal, inspection and installation of aircraft oxygen systems?
AAP 7212.001- 7
AAP 7055.001-99
AAP 7001.059
AAP 7002.023
50
What does a Continuous Flow Regulator Provide?
Rapid flow of oxygen that won't stop
Continuous flow of oxygen from the storage unit to the aircrew.
Continuous flow of oxygen from the aircrew to the storage unit.
Demand (breath in) controlled oxygen
51
In a LDBO Converter, what stores the liquid oxygen?
Inner Shell
Middle Shell
Outer Shell
Casing
52
What is the purpose of Oxygen Regulators?
Used for Oxygen consumption
Filter out dust particles
Used for rapid Emergency descent
Used to regulate breathing oxygen
53
What colour are Low Pressure Cylinders?
Black
Green
White
Yellow
54
What is the standard atmospheric of Oxygen at zero degrees centigrade (0⁰C)?
20%
1.1 times heavier than air
3 times faster than airspeed
Half of normal air pressure
55
What material is used for plumbing in low-pressure oxygen system plumbing?
Stainless Steel
Aluminium Alloy
Silver
Carbon Steel
56
What are the Common checks/tests on installed airborne oxygen systems?
Purge and Seal Test
Odour/ Contamination Check
Swift Test
Leak Test
57
What isolates the storage cylinders from the rest of the system?
Cut off Valve
Vent Shaft
Line Valve
Fuse
58
What material is used for plumbing in high-pressure oxygen system plumbing?
Gold
Aluminium Alloy
Carbon
Stainless Steel
59
Maintenance operations performed on installed airborne oxygen equipment requires what?
Independent Inspection
Stop all work
SPO Inspection
Electrical Power to be on at all times
60
What percentage of atmospheric gases are made up of oxygen?
1.1%
50%
20%
78%
61
In The ADF, Main areas of oxygen use are?
High purity Dry Breathing Oxygen with moisture on-board aircraft systems
High purity Dry Breathing Oxygen (DBO) on-board aircraft systems
Cutting and welding.
Medicine (high purity breathing oxygen containing moisture)
62
What colour is the Oxygen Charging Regulator Assembly painted?
Red
Black with White Neck
White
Green
63
Ensure what is applied to the oxygen system to allow work rendered safe...
Circuit Breakers are tripped
Use Regular CTK
Paint all Oxygen Tools
Make sure IMI is always present
64
What produces increased flow of oxygen at the beginning of operation to assure that the user will receive oxygen quick?
100% Oxygen
Nitrogen Spark
Tapered Candle
Ram Air
65
What is the max pressure that an Extra High Pressure (EHP) Cylinder can be pressurised to?
300 PSI
2800 PSI
3600 KSI
3600 PSI
66
Prepare and render the oxygen system safe in accordance with the applicable maintenance manual what must be done?
Spray Oxygen away from face to check it works
Battery must be on
Isolation Tags
Use any CTK
67
Which Bed produces the Oxygen?
Bed B
Bed A
68
What PSI does Airborne high-pressure oxygen cylinders?
2000-3600 PSI
1800-2000 PSI
1800-2000 KSI
Max of 1000 PSI
69
What function mixes the oxygen with air to provide the aircrew with a varying oxygen/air mixture.
Dilute
Conditioning
Mixing
Demand
70
What enables maintenance to charge the gaseous oxygen systems on aircraft types from a facility with maximum safety?
Oxygen Fill Up Station
Oxygen Charging Regulator Assembly
Oxygen Pump Valve
Portable Oxygen Inflation/ Deflation Trolley
71
What happens at 14,000ft to allow for oxygen to get to passengers?
Parachutes deploy
Ram air enters cabin
Nothing
Trigger valve operates
72
In a Continuous Flow Regulator, Where is the air mixed with the Oxygen?
Filter Unit
At the Mask
It doesn't mix
Storage Unit
73
What must be 50m away from Oxygen Replenishment?
Vaping
Trees
Cigarettes
Naked Flame
74
What colour are EHP cylinders?
White
White with Black Neck
Black with White Neck
Pale Blue
75
Demand function only regulates when Aircrew breath out and allows varying oxygen/air mixture
True
False
76
What can cause an individual to override normal automatic functions such as breathing rate?
Addiction
Anxiety
Fear
Stress
