4.0 Airspace Classification and Operational Requirements Part 107 Practice Quiz

• A. Class A begins at 18,000 ft MSL; standard Part 107 sUAS operations are already constrained well below this altitude and would never reach Class A
• B. Class A begins at 10,000 ft MSL; sUAS may operate in Class A without authorization if they stay below 12,500 ft MSL
• C. Class A begins at 14,500 ft MSL; sUAS need ATC authorization but may otherwise operate using standard VFR procedures
• D. Class A begins at 18,000 ft MSL; sUAS may freely transit Class A airspace because it is above all controlled airport traffic areas

Class A airspace begins at 18,000 ft MSL and extends upward to FL600; because Part 107 limits sUAS to 400 ft AGL under standard rules, sUAS operations never approach Class A.

• A. ATC authorization from the controlling facility, obtainable via LAANC or FAA DroneZone prior to the operation
• B. No authorization is needed because sUAS weigh less than 55 pounds and pose minimal risk to commercial aircraft at ground level
• C. A written letter of agreement between the remote pilot and the airport authority governing the specific operation
• D. A Class B airspace waiver filed with the FAA at least 90 days before the intended flight date

Under 14 CFR 107.41, no person may operate an sUAS in Class B airspace without ATC authorization; LAANC or the FAA DroneZone portal are the standard methods for obtaining this authorization.

• A. A single large circle of uniform floor and ceiling altitude extending 20 nautical miles from the primary airport
• B. A cylinder extending from the surface to 2,500 ft AGL within a 5-mile radius of the primary airport
• C. A rectangular block of airspace centered on the airport with uniform dimensions up to 10,000 ft MSL
• D. An inverted wedding cake with floors that rise with increasing distance from the airport, forming increasingly higher tiers

Class B airspace is described as resembling an inverted wedding cake, with successive tiers having higher floors as distance from the primary airport increases, allowing arriving and departing traffic to transition in and out.

• A. The inner ring extends from the surface to 4,000 ft AGL within a 5 nautical mile radius of the primary airport
• B. The inner ring extends from the surface to 2,500 ft AGL within a 10 nautical mile radius of the primary airport
• C. The inner ring extends from 1,200 ft AGL to 4,000 ft AGL within a 5 nautical mile radius of the primary airport
• D. The inner ring extends from the surface to approximately 4,000 ft above the airport elevation within a 5 nautical mile radius of the primary airport

Per AIM 3-2-4, the standard Class C inner core has a 5 NM radius and extends from the surface to approximately 4,000 ft above the airport elevation. Exact ceilings are tailored per airport and depicted on sectional charts.

• A. A Mode C veil requiring all aircraft to be equipped with altitude-encoding transponders within this ring
• B. A Class D surface area that is active only when the tower is in operation during published hours
• C. A Class C outer ring indicating radar approach control services are available at this non-towered airport
• D. A Class E surface area where Class E airspace begins at the surface to accommodate instrument approaches at non-towered airports

A magenta dashed line on a sectional chart indicates a Class E surface area, where Class E airspace extends from the surface up; this designation is used at airports with instrument approaches but no control tower, requiring instrument weather separation at the surface.

• A. The airspace reverts to Class E or Class G as charted when the tower closes, and ATC authorization is no longer required for the sUAS flight
• B. The airspace remains Class D for 30 minutes after official tower closure as a buffer period to protect departing traffic
• C. The airspace automatically becomes Class B when the tower closes because the airport's instrument approaches remain active
• D. The airspace becomes uncontrolled Class G regardless of any charted transition area since all controlled airspace requires an active tower

When a part-time Class D tower closes, the airspace reverts to the airspace charted for the after-hours period, which is typically Class E (if a transition area exists) or Class G; ATC authorization is not required for sUAS operations in Class G or non-surface Class E.

• A. It indicates a Class B airspace boundary where radar services transition from mandatory to advisory beyond the shaded ring
• B. It depicts a prohibited area where all civil aircraft including sUAS are excluded without prior FAA authorization
• C. It marks a Military Operations Area (MOA) boundary where military training activities may be conducted at low altitudes
• D. It indicates that Class E airspace begins at 700 ft AGL in the shaded area, transitioning instrument traffic from Class G at lower altitudes

A magenta vignette or fade on a sectional chart indicates that Class E airspace begins at 700 ft AGL in that area, providing a transition area where IFR traffic transitions between the en route environment and the airport environment; below 700 ft AGL in that area the airspace is Class G.

• A. The ceiling is 40 ft AGL and the floor begins at 12 ft AGL, indicating an extremely low-level airspace
• B. The ceiling is 4,000 ft MSL and the floor is 1,200 ft MSL, defining the altitude band of the outer ring
• C. The ceiling is 4,000 ft MSL above airport elevation and the floor is 1,200 ft MSL above airport elevation, defining the outer shelf
• D. The numbers represent the ceiling and floor in hundreds of feet MSL: ceiling at 4,000 ft MSL, floor at 1,200 ft MSL

On sectional charts, Class C airspace ceiling and floor values are expressed in hundreds of feet MSL; 40/12 means the ceiling is 4,000 ft MSL and the floor is 1,200 ft MSL, defining the outer shelf boundaries.