JAR questions
Hello folks
I am doing my ATPL exams now and on my last sitting there were 2 questions that I cannīt find the anserws to in my textbooks.
1. Why are there 2 trim knobs on some control wheels?
2. What do passengers breath through their masks?
The anserws for this on were like
a) 100% oxygen
b) oxygen + cabin air
c) cabin air
any help would be great.