Question E1B03:
[97.13] Within what distance must an amateur station protect an FCC monitoring facility from harmful interference?  

Choices:  
A: 1 mile  
B: 3 miles  
C: 10 miles  
D: 30 miles    

Correct Answer is  A: 1 mile  

Correct answer: A — 1 mile

Why this is correct:
- Part 97.13 requires amateurs to protect FCC monitoring facilities from harmful interference within a radius of $1$ mile. Within this zone, the FCC can require power reductions, antenna changes, or other mitigations to prevent interference.

Why the other choices are incorrect:
- 3 miles, 10 miles, and 30 miles are not specified in Part 97 for FCC monitoring facility protection. These are distractors; the only special protection radius in Part 97 for these facilities is $1$ mile.

Useful rule of thumb:
- Memorize: FCC monitoring facility protection radius = $1$ mile (per 47 CFR §97.13).