Home › Part 107 Practice Tests › Airspace & Flight Restrictions Questions › Question 46
The ceiling of Class C airspace is expressed as 4,000 feet above what reference?
- A.Mean sea level at the nearest coast
- B.The elevation of the primary airport
- C.The highest terrain within 10 NM
Correct answer
B. The elevation of the primary airport
Why
Class C tops out at 4,000 feet above the primary airport's elevation. Using coastal sea level or nearby terrain would give the wrong ceiling for airports at elevation.
Source: FAA-G-8082-22 Ch. 2 · ACS knowledge area: Airspace Classification and Operating Requirements · From the Airspace & Flight Restrictions practice bank (AIR-046).