Technician exam question T7B03
Subelement T7, PRACTICAL CIRCUITS· Group T7B
Which of the following can cause radio frequency interference?
- A.Fundamental overload
- B.Harmonics
- C.Spurious emissions
- D.All these choices are correct (correct answer)
WhyFundamental overload, harmonics, and spurious emissions can all cause radio frequency interference. Fundamental overload (a strong signal simply overwhelming a receiver), harmonics (unwanted multiples of the operating frequency), and spurious emissions (other unintended signals from a transmitter) can each independently cause radio frequency interference, so all three are correct, answer D. Picking just one of A, B, or C would ignore the other two real, distinct causes of RFI.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2026-2030 NCVEC Element 2 pool (public domain); the explanation above is original writing, see our methodology.
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