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WorksheetsOxygen
Total questions: 46
Worksheet time: 46mins
What percentage of oxygen is in the atmosphere?
21%
78%
1%
What percentage must oxygen levels drop by so body functions get affected?
Below 16%
Below 26%
Below 30%
A total lack of oxygen in the blood is called?
Hypoxia
Anoxia
Hyperoxia
An excess of oxygen to the human body is called?
Hypoxia
Anoxia
Hyperoxia
What altitude must aircraft cabin pressurization occur?
10,000 feet and above
12,000 feet and above
8,000 feet and above
A total lack of oxygen in the blood is called?
Anoxia
Hypoxia
Hyperoxia
Continuous flow, diluter demand and pressure demand are all types of?
Oxygen systems
Nitrogen systems
Auxiliary gas systems
Portable oxygen systems consist of?
Lightweight cylinders
Lightweight cylinders, regulator and single mask
Lightweight cylinders, regulator and multiple masks
Which Australian Civil Aviation Safety Authority contains specifications for aircraft oxygen systems intended for operations up to 40,000 ft?
CAO 108.26
CAO 108.36
CAO 108.46
What is liquid oxygen stored in?
Dewar
Lightweight tank
Air-conditioner system
What percentage must oxygen by volume be contained in aviation purpose on-board oxygen systems?
99.5%
100%
85%
What pressure range is oxygen stored in general aviation fleet steel containers?
1800 and 2400 psi
1000 and 1800 psi
500 and 980 psi
What colour is liquid oxygen?
Pale blue
Light orange
Maroon
What temperature is oxygen stored at?
-181 F (-118 C)
118 F (118 C)
-150 F (-132 C)
What is the purpose of the vacuum section in a liquid oxygen system?
Prevents heat transfer into the inner container
Maintains pressure on the system
Allows for continuous flow of oxygen
What is a convenient method of carrying oxygen for emergency uses and for aircraft that require is only occasionally?
Solid oxygen candle
Personal oxygen tanks
Lightweight oxygen systems
What compound is used to convert into an oxygen supply for carrying oxygen?
Sodium chlorate
Sodium nitrate
Sodium hydroxide
What is air drawn out of in a mechanically separated oxygen system to remove nitrogen out of the air?
Molecular sieve
Filter
Bypass concentrate
What is the mechanical method of separating oxygen called?
OBOGS
ORSYS
OMITT
On large transport aircraft, the flight crews gaseous oxygen system is operated how?
Manually
Automated
Automatically
What colour are oxygen cylinders painted?
Wakefield green
Light green
Barret green
What is sometimes used on oxygen cylinders to make them shatter proof?
Wire wound
Rubber inner
Steel brackets
Below what pressure are oxygen cylinders considered to be empty?
50 psi
100 psi
25 psi
What will happen if you leave an oxygen cylinder completely empty?
Corrosion
Structural deterioration
Brittleness
What pressure will a oxygen tank be hydrostatically tested once past the 3 to 5 year test date?
3000psi
2000psi
1000psi
What pressure will cause the frangible disc to rupture in an oxygen cylinder?
2600 psi
3600 psi
1600psi
What will happen to the indicator disk if oxygen pressure becomes excessive and ruptures the frangible disk in a oxygen cylinder?
Disc is blown out the fuselage
Disc will break
Disk will be absorbed in the cylinder
What pressure do pressure reducing regulators reduce and oxygen tank to?
600-680 psi
1000-1400 psi
300-570psi
What type of mask pressure regulator is found in low demand oxygen systems?
Continuous
Demand
Simultaneous
What is used on an automatic continuous flow regulator to automatically adjust flow to correspond with the altitude?
Barometric control valve
Bore tube
Goggle vent
Which altitude does the air passage completely close off in a demand regulator?
34,000ft
24,000ft
14,000ft
If there is smoke in the cabin of an aircraft, what must the demand regulator selector be switched to?
NORMAL
100%
OXYGEN
Pressure demand regulators are required on unpressurised aircraft which fly at which altitude and above?
30,000 ft
40,000 ft
25,000 ft
How can air escape a continuous flow type oxygen mask?
One way check valve
Exhalation through the nose
Relief valve
When are continuous flow oxygen systems usually used?
Oxygen is only needed occasionally
Oxygen is needed continuously
Oxygen is needed to be forced into the cabin
The pressure relief valve is incorporated into the continuous flow oxygen system for?
Prevent damage in the event of a failure of pressure reducing valve.
Meter the amount of oxygen supplied to each mask
Prevent rapid changes in flow rate that place excessive strain on the system
What is used to provide oxygen for walk around first aid, emergency and sustaining purposes?
Portable oxygen cylinder
Liquid oxygen systems
Chemical oxygen systems
One litre of liquid oxygen will produce approx how many litres of gaseous oxygen?
860
960
760
For a chemical oxygen system, sodium chlorate mixed with binders and fuel to create a block called?
Candle
Wakefield
Coil
What must block caused by sodium chlorate reaction in a solid oxygen system be installed with?
Heat dissipating cage
Ventilation fan
Neutraliser
What is a negative to chemical oxygen system?
They cannot be tested without being used.
They are heavy and expensive
They have a limited shelf life
To reduce the possibility of ignition sources, all protective equipment should be what to prevent oxygen to ignite with contaminants?
Electrostatic free
Well lubricated with oil or grease
A dense material
An oxygen system needs to be purged if it has been opened or depleted for more than how long?
2 hours
1 hour
30 minutes
Once purging out all of the oxygen system with nitrogen or dry air, what must be done before the system is serviceable for use?
Purge with pure oxygen
Ignite any leftover contaminates
Purge with water
What determines the pressure that should be put into oxygen system when filling up?
Ambient temperature
Percentage of nitrogen in system
Existing pressure in the system
Normal cylinder pressure for crew oxygen is how much at 70 degrees Fahrenheit?
1850 psi
2000 psi
2125 psi
