Home › Part 107 Practice Tests › Airspace & Flight Restrictions Questions › Question 59
An aircraft cruising at FL 180 is operating in which airspace class at the bottom of the flight level structure?
- A.Class E airspace
- B.Class B airspace
- C.Class A airspace beginning at 18,000 feet MSL
Correct answer
C. Class A airspace beginning at 18,000 feet MSL
Why
Class A begins at 18,000 feet MSL, corresponding to FL 180, and extends to FL 600. Class B tops out at 10,000 feet MSL, far below that altitude.
Source: FAA-G-8082-22 Ch. 2 · ACS knowledge area: Airspace Classification and Operating Requirements · From the Airspace & Flight Restrictions practice bank (AIR-059).