Basic Qualification · B-003 Station assembly, practice and safety · B-003-017-005
In a mobile installation, why should the fuse in the DC line to the transceiver be located as near to the battery as possible?
- A To protect the entire circuit
- B To reduce the voltage drop in the radio's DC supply
- C To prevent the vehicle's electronic systems causing noise
- D To better absorb voltage transients
Correct answer: A — To protect the entire circuit. From the official ISED question bank, verified word for word.
Why
Placing the fuse right next to the battery ensures that if a short circuit happens anywhere along the power cable, the fuse blows before the wire can overheat and start a fire. 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.