Avionics Electrical Technician First Class (AET1) SWE Practice Test 2026 – The Comprehensive All-in-One Guide to Exam Success!

The key point is safety around fueling operations: RF energy from an energized radar antenna can ignite fuel vapors, so a substantial separation is required to minimize ignition risk. Installing a dummy load inside the antenna setup eliminates the radiated RF power, removing the energy source that could ignite vapors. With the dummy load preventing energizing the antenna, you can operate closer to fueling activities without exposing the fueling area to RF energy. Without the dummy load, the standard, larger safety clearance must be maintained to keep ignition risks down. This is why a larger separation is the recommended practice unless a dummy load is used to prevent energizing the antenna.