Technician exam question T3C10
Subelement T3, RADIO WAVE PROPAGATION· Group T3C
Which of the following bands may provide long-distance communications via the ionosphere’s F region during the peak of the sunspot cycle?
- A.6 and 10 meters (correct answer)
- B.23 centimeters
- C.70 centimeters and 1.25 meters
- D.All these choices are correct
Why6 and 10 meters may provide long-distance communications via the ionosphere's F region during the peak of the sunspot cycle. During the peak of the roughly 11-year sunspot cycle, ionization gets strong enough that even the higher HF/low-VHF bands, 6 and 10 meters, can support F region long-distance propagation that isn't available during quieter solar periods, answer A. 23 centimeters (B) and the 70-centimeter/1.25-meter pairing (C) are far too high in frequency for F region reflection under any sunspot conditions, so D, which depends on those being included, is also wrong.
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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