Technician exam question T7C10
Subelement T7, PRACTICAL CIRCUITS· Group T7C
Why should the outer jacket of coaxial cable be resistant to ultraviolet light?
- A.Ultraviolet light can increase the resistance of the conductors
- B.Ultraviolet light can increase losses in the cable’s jacket
- C.Ultraviolet and RF signals can mix, causing interference
- D.Ultraviolet light can damage the jacket and allow water to enter the cable (correct answer)
WhyThe outer jacket of coaxial cable should be resistant to ultraviolet light because UV light can damage the jacket and allow water to enter the cable. Prolonged ultraviolet exposure breaks down the plastic outer jacket of coaxial cable over time, and once that jacket cracks or degrades, water can work its way in and ruin the cable's performance, answer D. UV light doesn't meaningfully change conductor resistance (A) or add loss inside an intact jacket (B), and UV and RF signals don't mix together to create interference (C), those are unrelated physical phenomena.
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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