General exam question G9A06
Subelement G9, ANTENNAS AND FEED LINES· Group G9A
G9A06
In what units is RF feed line loss usually expressed?
- A.Ohms per 1,000 feet
- B.Decibels per 1,000 feet
- C.Ohms per 100 feet
- D.Decibels per 100 feet (correct answer)
WhyRF feed line loss is usually expressed in decibels per 100 feet. Feed line loss is conventionally specified in decibels per 100 feet, matching the way manufacturers publish coax loss tables at various frequencies, answer D. Ohms isn't a unit of loss at all (that's an impedance unit), and "per 1,000 feet" isn't the standard reference length used for this figure, so A, B, and C are wrong.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2023-2027 NCVEC Element 3 pool (public domain); the explanation above is original writing, see our methodology.
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