Ham Radio General Class Practice Test

What precaution should you take if you install an indoor transmitting antenna?

1. Locate the antenna close to your operating position to minimize feed-line radiation

2. Position the antenna along the edge of a wall to reduce parasitic radiation

3. Make sure that MPE limits are not exceeded in occupied areas

4. No special precautions are necessary if SSB and CW are the only modes used

The correct answer is: Make sure that MPE limits are not exceeded in occupied areas

Choosing to ensure that MPE limits are not exceeded in occupied areas is crucial when installing an indoor transmitting antenna. MPE stands for Maximum Permissible Exposure, which refers to the levels of RF (radio frequency) radiation that are considered safe for human exposure. When transmitting, especially indoors where space is confined, there is a higher likelihood of individuals being exposed to radiation levels that could potentially exceed these safe thresholds. By verifying that MPE limits are adhered to, you proactively prevent health hazards that could arise from prolonged exposure to RF energy, which may cause issues like thermal injuries or other biological effects. It is essential to carefully assess the antenna's placement and the environment in which it operates to ensure compliance with regulatory standards designed to protect users and others nearby. The other options, while related to antenna installation, do not directly address safety concerns associated with human exposure to RF radiation, which is the primary focus of MPE guidelines. Thus, ensuring compliance with MPE standards is the most responsible and necessary precaution when setting up an indoor transmitting antenna.