Basic Qualification · B-006 Feedlines and antenna systems · B-006-003-009
What type of coaxial outer conductor offers the best shielding?
- A Double braided shield
- B Solid shield
- C Aluminum foil
- D Single 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
Getting the signal out: antennas, feedlines, SWR, baluns, matching, and why antenna length depends on frequency.