Home › Part 107 Practice Tests › Airspace & Flight Restrictions Questions › Question 67
On a sectional chart, the numbers shown inside Class B shelf boundaries, such as 100 over 40, express the ceiling and floor in
- A.hundreds of feet AGL above the airport only
- B.hundreds of feet MSL
- C.nautical miles from the airport
Correct answer
B. hundreds of feet MSL
Why
Shelf figures are given in hundreds of feet MSL, so 100 over 40 means a ceiling of 10,000 feet MSL and a floor of 4,000 feet MSL. They are altitudes, not distances from the airport.
Source: FAA-G-8082-22 Ch. 2 · ACS knowledge area: Airspace Classification and Operating Requirements · From the Airspace & Flight Restrictions practice bank (AIR-067).