Basic Qualification · B-003 Station assembly, practice and safety · B-003-017-010
Why must the positive lead from the vehicle battery to your transceiver be fused?
- A To reduce the voltage drop in the radio's DC supply
- B To protect the radio from transient voltages
- C To prevent an overcurrent situation from starting a fire
- D To prevent interference to the vehicle's electronic systems
Correct answer: C — To prevent an overcurrent situation from starting a fire. From the official ISED question bank, verified word for word.
Why
A fuse acts as a deliberate weak link that melts and cuts power if too much current flows, which stops thick wires from overheating and igniting a fire in your vehicle. 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.