Basic Qualification · B-006 Feedlines and antenna systems · B-006-003-009
What type of coaxial outer conductor offers the best shielding?
- ADouble braided shield
- BSolid shield
- CAluminum foil
- DSingle braided shield
Correct answer: B — Solid shield. From the official ISED question bank, verified word for word.
Why
A solid shield acts like a continuous metal tube around the inner wire, leaving no gaps for radio signals to leak in or out. The full explanation — and one for every question — is in Pro.
Practise this section
Feedlines and antenna systems is section B-006 of the Basic exam: Getting the signal out: antennas, feedlines, SWR, baluns, matching, and why antenna length depends on frequency.
Drill B-006 — free, no account