FAA Military Competency Practice Exam

What transponder equipment is necessary for operations within Class B airspace?

1. A transponder with 4096 code only.

2. A transponder with Mode S capability only.

3. A transponder with 4096 code and Mode C capability.

4. No transponder is required for Class B airspace.

The correct answer is: A transponder with 4096 code and Mode C capability.

In Class B airspace, a transponder with a 4096-code capability and Mode C capability is required. This is because Class B airspace is the most heavily trafficked airspace and is designed to manage a high density of aircraft while ensuring safety through precise tracking and communication with Air Traffic Control (ATC). The 4096-code allows for unique identification of each aircraft, which is vital in busy airspace. The Mode C capability allows the transponder to transmit the aircraft's altitude, providing ATC with essential information about vertical positioning. This altitude data is crucial for maintaining safe separation between aircraft operating at varying altitudes. In addition, transponder requirements are in place to enhance situational awareness for both pilots and ATC, which is particularly important in complex environments like Class B airspace, where there may be multiple aircraft operating in close proximity. Having both code and altitude information helps in avoiding conflicts and ensuring safe operations.