FAA Military Competency Practice Exam

Which type of transponder equipment is required for airplane operations within Class B airspace?

1. Mode A capability

2. 4096 code with Mode C capability

3. Mode S capability only

4. No transponder required

The correct answer is: 4096 code with Mode C capability

In Class B airspace, aircraft operations require a transponder that is equipped with a 4096 code and Mode C capability. The reason for this requirement is to ensure enhanced situational awareness and improve safety in busy airspace. Mode C transponders provide altitude information along with the aircraft’s identification, which is crucial for air traffic control (ATC) to effectively manage the separation of aircraft. By using a Mode C transponder, the aircraft provides its altitude along with a unique squawk code that helps ATC track and identify the aircraft on radar. This capability is key in Class B airspace, which is typically characterized by high traffic density and complex air operations surrounding major airports. The requirement for Mode C is part of efforts to minimize the risk of mid-air collisions and to assist with the safe and efficient flow of air traffic. The other options, while mentioning types of transponder capabilities, do not fulfill the specific requirements set for Class B airspace operations. Mode A capability lacks altitude reporting, which is essential for operations in such controlled environments, and Mode S capability, while advanced, is not the minimum requirement mandated for all aircraft in Class B airspace unless specifically indicated. Finally, the idea that no transponder is required does not