Chapter 4: Oxygen Flashcards
what will happen to human body when there is a reduction of oxygen supply
affect body function
degree of consciousness
how to overcome less oxygen from reduction of pressure at high altitudes
1) increase quantity of oxygen in air
2) increase pressure of oxygen
which aircrafts uses which method to overcome oxygen problem?
small/medium aircraft: increase quantity of oxygen
large/passenger aircraft: pressurise air
oxygen characteristics
colourless, odourless, tasteless at normal temp and pressures
what is the maximum water level within the oxygen cylinders
0.02ml per litre of oxygen
what colour is the aviators breathing oxygen cylinder in?
green
liquid oxygen characteristics
pale blue, transparent liquid below -183degC or pressurising gaseous oxygen
why is liquid oxygen used?
small amount of LOX can be converted to large amount of gaseous oxygen (less storage space)
how does a chemical oxygen supply work?
firing pin that lights up sodium chlorate when pulled
generator will provide 10 - 20 minutes of oxygen
how does onboard oxygen generating system (OBOGS) work?
passes bleed air from turbine through sieve that seperates oxygen for breathing
what are the oxygen system and their targeted use?
continuous flow oxygen system:
installed for both passenger & crew
demand flow oxygen system:
crew system on large transport aircraft
how does continuous flow system work?
allows oxygen to leave tank through a valve and passes through a regulator
how does demand flow system work?
oxygen is allowed to flow into the mask when the user inhales (negative pressure is created)
how does pressure demand system work?
selector switch for user to choose % of oxygen delivered
where are pressure demand regulators usually on?
aircraft that flies 40000ft and above (fighter jets)
