In the North Atlantic Region, the airspace at and above _____ is Class _____, while airspace below this level is Class _____ airspace {Ans: 1) FL055 2) A 3) G}What is the purpose of a diffuser within a gas turbine engine? {Ans: Decreases the airflow velocity and increases the pressure.}What are the approximate time of useful consciousness following rapid decompression at: 1) 20,000 2) 25,000 3) 30,000 4) 35,000 5) 40,000 6) 45,000 7) 50,000+ {Ans: 1) 5-12 minutes 2) 2-3 minutes 3) 45-75 seconds 4) 30-60 seconds 5) 10-30 seconds 6) 12-15 seconds 7) 12 or less seconds}No person shall fly an aircraft over water within a multi-engine aircraft that is able to maintain flight with any engine failed for a distance greater than _____ nm, or distance covered in _____ minutes of flight at cruising speed, unless life rafts are carried. {Ans: 1) 200 nm 2) 60 minutes}What is the danger when an object lacks relative motion? {Ans: Even though the object appears to be fixed because of the lack of relative motion; it may actually be converging with your flight path}In the case where an Aircraft (Turbo-jet) is required to have an