*Question E0A02:
When evaluating RF exposure levels from your station at a neighbor’s home, what must you do?*  

*Correct Answer is  B: Ensure signals from your station are less than the uncontrolled maximum permissible exposure (MPE) limits*  

### AI Response: (may contain errors)  

When evaluating RF exposure levels at a neighbor's home, you must ensure that the signals from your station are below the uncontrolled maximum permissible exposure (MPE) limits. Here's why:

### Explanation:

1. **Correct Answer: B - Uncontrolled MPE Limits**
   - **Uncontrolled Environment**: This refers to areas where people who are not aware of RF exposure risks might be present, such as your neighbor's home. The FCC sets stricter limits for these areas to ensure safety.
   - **MPE Limits**: These are the maximum levels of RF exposure that are considered safe. For uncontrolled environments, the limits are lower than for controlled environments to protect the general public.

2. **Why Other Choices Are Incorrect:**
   - **Choice A (Controlled MPE Limits)**: Controlled environments are areas where people are aware of RF exposure and can take precautions, such as your own home or workplace. The limits are higher because people are informed and can manage their exposure.
   - **Choice C (Controlled MPE Limits)**: This is incorrect for the same reason as Choice A. It refers to controlled environments, not applicable to a neighbor's home.
   - **Choice D (Uncontrolled MPE Limits)**: The term "emission" is incorrect here. The focus should be on "exposure," which relates to the safety of people in the vicinity of RF sources.

### Useful Rule of Thumb:

- **Controlled vs. Uncontrolled**: Always consider the environment. If people are unaware of RF exposure, use the stricter uncontrolled MPE limits to ensure safety.

By understanding these distinctions, you can ensure compliance with FCC regulations and protect those around you from excessive RF exposure.