Basic Qualification · B-003 Station assembly, practice and safety · B-003-019-004
Which of these materials is best for a ground rod driven into the earth?
- A Iron or steel
- B Fibreglass
- C Copper-clad steel
- D Hard plastic
Correct answer: C — Copper-clad steel. From the official ISED question bank, verified word for word.
Why
Copper-clad steel is the best choice because it combines the strength of steel to be driven deep into the ground with the superior electrical conductivity of copper to safely carry lightning or fault currents away. The full explanation — and one for every question — is in Pro.
Practise this section
Building a station safely: power supplies, grounding, RF exposure, lightning, feedline routing, and what a transmitter, receiver and transceiver actually do.