Basic Qualification · B-007 Radio wave propagation · B-007-006-005
What is one way to determine if the maximum usable frequency (MUF) is high enough to support 28 MHz propagation between your station and western Europe?
- AListen for 20-metre beacon stations
- BListen for 31-metre broadcast stations
- CListen for WWVH time signals on 15 MHz
- DListen for 10-metre beacon stations
Correct answer: D — Listen for 10-metre beacon stations. From the official ISED question bank, verified word for word.
Why
Beacon stations are simple transmitters that send a steady signal so you can check if a band is open. The full explanation — and one for every question — is in Pro.
Practise this section
Radio wave propagation is section B-007 of the Basic exam: How signals travel: the ionosphere and its layers, skip, ground wave, sporadic E, and which bands work when.
Drill B-007 — free, no account