FAA Questions/Flight Instructor/Question #2
airspaceFAA-published sample question (AGI, Aug 2021)

(Refer to FAA-CT-8080-5H, Figure 47.) Class C airspace usually extends up to

FAA Figure 47Class C airspace diagramFAA-CT-8080-5H · Flight & Ground Instructor supplement
How to read it: Core area: 5 NM radius from the surface; shelf area: 10 NM radius from 1,200 ft AGL; both usually up to 4,000 ft above the airport.
A

3,000 feet MSL.

B

3,000 feet above airport.

C

4,000 feet above airport.✓ Correct Answer

Explanation

AIM 3-2-4 describes Class C airspace as normally extending from the surface to 4,000 feet above the primary airport elevation, with the outer shelf from 1,200 feet AGL. The altitudes are charted in MSL, but the design height is 4,000 feet above the airport, not 3,000.

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