Technician exam question T4A11
Subelement T4, AMATEUR RADIO PRACTICES· Group T4A
Where should the negative power return of a mobile transceiver be connected in a vehicle?
- A.At the 12-volt battery chassis ground (correct answer)
- B.To the shell of the power connector
- C.To any metal part of the vehicle
- D.Through the transceiver’s mounting bracket
WhyA mobile transceiver's negative power return should connect at the 12-volt battery chassis ground. Returning the negative power lead directly to the vehicle battery's chassis ground point gives the radio a solid, low-resistance, low-noise return path, answer A. Grounding to the connector shell (B), to whatever metal happens to be nearby (C), or through the mounting bracket (D) all risk higher-resistance or corroded connections that introduce noise and voltage drop into the radio's supply.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2026-2030 NCVEC Element 2 pool (public domain); the explanation above is original writing, see our methodology.
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