21-13. OXYGEN SYSTEMS
All questions: 73
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1. The disadvantages of a chemical oxygen source for the passenger cabin are: 1) a flow which cannot be modulated 2) a heavy and bulky system 3) non-reversible functioning 4) risks of explosion 5) poor autonomy The combination regrouping all the correct statements is:
2. Consider the flight deck oxygen supply system. The purpose of the oxygen regulator (as a function of demand and altitude) is to: 1) decrease oxygen pressure from 1.800 psi (in the bottles) down to about 50-75 psi (low pressure system) 2) supply pure oxygen 3) supply diluted oxygen 4) supply oxygen at normal pressure 5) supply oxygen at emergency/positive pressure 6) trigger the continuous cabin altitude warning at 10.000 ft cabin altitude The combination regrouping all the correct statements is:
3. If the maximum operating pressure of the oxygen system is exceeded the:
4. The passenger oxygen drop-down mask stowage doors are released:
5. A public transport aircraft has a cruising altitude of FL390. It is fitted with individual oxygen masks for the passengers. In the event of depressurization, the masks must be automatically released before the cabin pressure altitude exceeds:
