I'm really not happy with these questions .... the way they are written is a little bit tricky ... pressurized aircraft at FL 260 ...

 

1. Operating above 25000ft - crew need quick donning oxygen masks – yes.

 

2. The rule ... Cabin altitude greater than 10000ft (3000m) - need warning - so you could argue that this is correct - you will certainly get a warning above 13000ft.

 

3. Pressurized aircraft, SUPPLEMENTAL oxygen for everyone entire fligh time above 15000ft - so definitely correct.

 

4. The rule for First Aid oxygen ... 2% of the passengers (in no case less than 1) for the remainder of the flight cabin altitude above 8000ft - so with 150 passengers - that is 3 - but again, you could argue that this statement is correct - you will have first aid oxygen for 2 passengers.

 

So, if the question is looking for a statement of the rules/regulations - only 1 & 3 are correct - but there is an argument that all 4 statements are OK!

 

I think they are after the rules - so 1 & 3 ... BUT .... we do need to know if this one turns up in an Exam!!