Breathing - it's a good thing
What is the final result of hypoxia if nothing is done to address it?
If you become too hypoxic you will pass out and unless you get more oxygen you will die.
What type of oxygen might have moisture and so is not acceptable for aircraft use.
Hospital oxygen.
What passenger jet flew at 60,000 feet with a cabin pressure of 6000 feet?
Concorde.
What valve keeps the plane from exploding?
Pressure relief valve.
Name one negative about engine driven pressurization systems on reciprocating aircraft?
1. Heavy
2. robs power
If the green disk on the outside of the aircraft is missing what does that tell us?
The oxygen pressure relief valve has opened up.
What is a continuous flow system?
What is a typical cabin pressure for a modern passenger aircraft?
8000 feet.
What valve keeps the plane from imploding?
Negative pressure relief valve.
What spins the turbine shaft on a turbocharger?
Exhaust gasses.
If aircraft are pressurized why do we need oxygen on board?
Because pressurization may fail, so supplemental oxygen enables occupants of the aircraft to breathe normally until the aircraft descends to a safe level. It can also be used to assist passengers in a medical emergency.
What is a rebreather?
Define isobaric pressurization.
Pressure is maintained to a specific cabin altitude regardless of the altitude of the aircraft. Differential pressure will vary depending on the altitude of the aircraft.
27,000 feet.
Which reciprocating aircraft pressurization uses constant speed gearing?
A centrifugal compressor.
What is the relationship between pressurization and people's ability to breathe on an aircraft at high altitude?
At high altitude, the air density is much lower, so there is less oxygen available for each cubic foot of air. Pressurization squeezes the air and makes it denser, therefore increasing the amount of oxygen available in each cubic foot, to a livable level.
What are the three types of onboard oxygen systems mentioned for aircraft?
Bottled gaseous oxygen
Oxygen candles
Liquid oxygen.
Define constant differential pressurization.
This is when the pressurization is set to maintain a constant difference between cabin altitude and aircraft altitude. This means that as the aircraft ascends and descends cabin pressure would vary to keep the differential the same.
If your fuselage can handle a differential pressure of 28,000 feet, your cabin is at 6,000 feet cabin pressure and your aircraft is flying at 36,000 feet, what could happen if your safety relief systems fail?
It could explode.
How is the air from a roots blower protected from oil contamination?
The bearings are in a sealed compartment that's separate from the airflow.
What is the relationship between carbon monoxide and hemoglobin?
Carbon monoxide binds with hemoglobin more readily than oxygen does, so it blocks the blood's ability to carry oxygen to the brain.
What are the types of demand oxygen regulators? What does each do?
Demand - dispenses oxygen any time the user breathes.
Diluter demand - dilutes the oxygen with ambient air up to certain altitudes, and dispenses the mixture when the user breathes.
Pressure demand - dispenses when the user breathers, slightly pressurizes the flow at altitudes above 40,000 feet to push air into the lungs.
25,000 feet
15,000 ft
probable reason.
If all of the valves got stuck closed, and you landed a plane at sea level, after flying it at 8,000 feet cabin pressure, what could happen?
The fuselage could collapse (implode).
What are the three main ways smaller reciprocating engine aircraft are pressurized?
Supercharger
Turbocharger
Engine driven compressor.